CN107455307A

CN107455307A - A kind of the artificial screening method and its screening plant of the high-quality colony of little yellow croaker

Info

Publication number: CN107455307A
Application number: CN201710855939.XA
Authority: CN
Inventors: 王志铮; 赵蓓蓓; 郭延泽
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2017-09-14
Filing date: 2017-09-14
Publication date: 2017-12-12

Abstract

A kind of the artificial screening method and its screening plant of the high-quality colony of little yellow croaker, it is screened using sea-farming resource and device, and it includes following basic skills and step：First, the high-quality colony of initial screening：1st, the setting of screening plant；2nd, screening plant inspection, cleaning and debugging；3rd, initial screening pretreatment and shoal of fish source；4th, the initial screening of the shoal of fish；2nd, high-quality colony is selected eventually；As a result of the present invention, effectively overcome using single traits as the group directional selection mode of selection target in the presence of the defects of, it fundamentally ensure that the quality of the high-quality colony of selected little yellow croaker, so as to thoroughly solve, current artificial screening seriously lags and cultivation parent is for many generations from numerous caused germplasm degenerate problem, the present invention is applied to the screening of the high-quality colony of different growth phases consortive group of flora little yellow croaker and parent population, with screening technique is easy directly perceived, installation cost is low, selected unblemished fish colony matter is strong, is quick on the draw, the characteristics of escape capability is strong, the speed of growth is fast.

Description

A kind of the artificial screening method and its screening plant of the high-quality colony of little yellow croaker

Technical field the present invention relates to the artificial screening method of the high-quality colony of a kind of little yellow croaker in culture fishery and its Screening plant, belong to Fishery cultural technique field.

Technical background little yellow croaker (latin name Larimichthys polyactis) also known as small yellow croaker, are under the jurisdiction of os osseum Net-rope, Actinopterygii, Perciformes, Sciaenidae, yellow croaker category, it is distributed widely in East China Sea, the Huanghai Sea and the Bohai Sea and Korea half Island west bank marine site.Its meat delicate flavour is beautiful, nutritious, economic value and medical value are high, with hairtail, little yellow croaker, inkfish and claiming me The great tradition marine products of state four, it is always the rare precious marine product of China's resident's eating.Happiness knot group, good adverse current, grows suitable water temperature 18-25 DEG C, suitable salinity 25-32, appropriate pH 7.8-8.3, dissolved oxygen should reach more than 4 mg/litres, and warm nature bottom knot group's property is warmed up for coastal waters Straddling fish stocks.In the recent period, as the lasting propulsion that little yellow croaker artificial breeding technique is studied, the fish are expected to support as China shallow sea net cage The important fingerling grown, but so far both at home and abroad there is not yet turning down the artificial screening research report of the high-quality colony of yellow croaker.

Elite germplasm screening is excavated and using the important content for being always Aquaculture Science research, for a long time by natural money Source is increasingly failed, and artificial screening seriously lags and cultivated parent and for many generations supported from numerous influence, the common aquaculture object in China Grow survival rate and specific yield go fromes bad to worse, germplasm degradation phenomena has turned into serious obstruction China's aquaculture upgrading synergy Great realistic problem.The screening and nurturing research for undoubtedly efficiently carrying out high-quality parent turn into current China's aquaculture scholars The focus of concern.

Artificial orientation selects system to carry out the conventional method of aquaculture object germplasm screening, is selected based on multiple target character High complexity and low success rate, to improve choice accuracy and accuracy rate, take mostly both at home and abroad at present using single traits as selection The group directional selection mode of target, selected objective trait relate generally to body colour, the speed of growth, anti-adversity and to certain element or The single specific character such as the enrichment of material and production capacity, there should be optimal cultivation to integrate with real aquatic products fine variety production and give birth to The theory of production performance mutually deviates from.

The optimal comprehensive production performance of cultivation and its high-quality colony refer to：In involved consortive group of flora large sample, in constitution, predation Sensitivity, the speed of growth and the upper comprehensive score highest colony of commodity economy value, its final selective ratio should be less than or equal to small Probabilistic standard.Selecting the purpose for most preferably cultivating the high-quality colony for integrating production performance is：1st, there is excellent genetic background, through essence The heart, which is cultivated, to breed parent as high-quality；2nd, in the fish of tool grouping behavior, the colony of the optimal comprehensive production performance of cultivation Often it is top dog in the consortive group of flora shoal of fish, through raising and train meticulously, signal transmission in kind can be run through, guide and lead increasing Grow that area is of the same race to be released the shoal of fish and enter artificial default feeding ground.

Failed increasingly actual, the most recent two decades that increasingly sharpen with ocean " desertification " to reverse traditional fishery resource conscientiously Between departments of fishery administration at different levels of China persistently increase investment to propagation fishery this capital-intensive industry, but Because the rate of recapture is low and cultivation effect visual evaluation technology does not obtain essence and solved for a long time, cause reality of the various circles of society to propagation fishery Border effect is passed different judgements on, and the sound of query is continuous.The propagation rate of recapture and propagation actual effect are effectively improved, is responded with directly perceived to propagation The query of fishery, it has also become the lasting significant technology issues for promoting propagation fishery sustainable health development to face and reality test. Wherein regnant high-quality individual is screened in group's property shoal of fish is tied, carries out artificial domestication, is run through signal transmission in kind, Guide and lead breeding blanket is of the same race to release the shoal of fish into artificial default feeding ground, undoubtedly for the raising propagation rate of recapture and intuitively Particularly important effect will be played by responding propagation fishery actual effect.

Therefore it is easy, easily operated and can intuitively filter out and have from the alternative shoal of fish to establish a kind of method for research and development The screening technique of the high-quality colony of the optimal comprehensive production performance of cultivation, and a set of screening plant to match therewith of design, just Seem very urgent and important.

Numerous studies show that the animal with Aggregation behaviour often forms the community characterized by " domination --- subordinate " Grade, wherein the colony being top dog often has most strong constitution and optimal cultivation synthesis production performance." net is broken Fish escapes " it is phenomenon most commonly seen in aquaculture production, when aquaculture net cage occurs damaged, the shoal of fish meeting in top stream mode Successively from net cage breakage it is orderly flee from, wherein be first away from aquaculture net cage often be exactly wherein be top dog High-quality colony.At the same time, in the shoal of fish cultivated in same net cage, weight gain performance it is most strong also tend to be wherein grab eat The high-quality colony being top dog during thing.Therefore, screened with cultured fishes " the broken fish of net escapes " characteristic and weight gain performance The method being combined, us can be easily helped to look for the finally selected high-quality target shoal of fish.

In view of described above, this method cultivates consortive group of flora as screening pair using the little yellow croaker with cluster, top Flow Behavior habit As carrying out high-quality mass screening, can effectively evade and be disturbed caused by age, breeding environment and breeding way difference.

Consortive group of flora refers to the group of individuals of the same age of the same race for undergoing identical breeding environment and identical breeding way.

Using consortive group of flora as screening object, according to the actual impossibility principle of small probability event, innovatively propose and establish One kind utilizes " the broken fish of net escapes " characteristic and weight gain performance to screen the high-quality mass screening method of little yellow croaker being combined and its screening dress Put.

Statistically it is referred to as testing probability or statistical probability and the probability estimated by many experiments, is represented with P values.Specifically For, P values represent the number percent for having a certain characteristic individual in experimental population, and it, which is reflected, has a certain spy in experimental population Levy the appearance possibility size of individual.

The objective statistical that the probability of chance event shows part of getting over is regular, and it reflects event and occurred in once testing The size of possibility, the possibility that the big expression event of probability occurs is big, and the possibility that the small expression event of probability occurs is small, if event The probability that A occurs is smaller, and such as 0.05 or 0.01, then it is assumed that event A is unlikely to occur in once testing, and this is referred to as small probability It is actual can not possibly occurring principle, abbreviation small probability principle, here 5% or 1% be referred to as small probability standard.

There is optimal cultivation to integrate suitable for each growth phase of consortive group of flora little yellow croaker for the screening technique and its screening plant The high-quality colony of production performance selects.

The content of the invention in order to overcome in current little yellow croaker seed selection using single traits as selection target group directional select The defects of in the presence of mode, the present invention provide a kind of the artificial screening method and its sieve of a kind of brand-new high-quality colony of little yellow croaker Screening device, by the way of fish " the broken fish of net escapes " characteristic and weight gain performance screening are combined, with little yellow croaker consortive group of flora large sample To screen object, the high-quality colony of little yellow croaker with the comprehensive production performance of optimal cultivation is filtered out in the case where pushing up stream mode, to realize The obtained little yellow croaker colony of screening has the purpose of the comprehensive production performance of optimal cultivation.

The technical solution adopted by the present invention is：

1st, the artificial screening method of the high-quality colony of a kind of little yellow croaker, it is screened using sea-farming resource and device, and it is wrapped Include following basic skills and step：

(1) the high-quality colony of initial screening

The setting of (1-1) screening plant

The screening plant by：Contributing region, Shou Yu areas, passageway area, Zan Yang areas and water supply dynamical system are formed, and are supplied water Area, Shou Yu areas, Ji Zanyang areas of passageway area are linked in sequence, and each junction is in sealing state, water supply dynamical system and contributing region It is connected, current regulating gate is provided between the contributing region and Shou Yu areas, contributing region is tank structure, and Zan Yang areas are Pond structure, contributing region are connected by current regulating gate with Shou Yu areas, and Shou Yu areas are connected with passageway area, passageway area with Zan Yang areas are connected；

Shou Yu areas dodge gate is provided with the housing in the Shou Yu areas, current regulation is installed in the housing in Shou Yu areas Gate, fish-luring light and attracting bait box；

Passageway area dodge gate is provided with the housing in the passageway area, rack is installed with the housing in passageway area A, rack B, rack C, rack D and rack E, escape hole is provided with each rack, one is respectively provided with each escape hole The individual cover plate that can cover the escape hole completely, to open and close escape hole；

The inspection of (1-2) screening plant, cleaning and debugging

A, each rack installation and position are checked；

B, the escape hole size on rack and installation position and cover plate flexibility are checked；

C, attracting bait box quantity, installation position are checked and is put into bait in box；

D, fish-luring light quantity and installation position are checked；

E, water supply dynamical system is checked, it is necessary to assure current supply during screening under the stream mode of shoal of fish top；

F, current regulating gate is checked, and is closed；

G, screening plant, the clean sea water can be washed down after normal use with clean sea water by completing above-mentioned review and validate Water quality, the NY5052-2001 pollution-free food used in mariculture water water of The Ministry of Agriculture of the People's Republic of China, MOA 2001 editions should be met The requirement of matter standard；

H, Shou Yu area's dodge gates and passageway area dodge gate are closed and is sealed；

(1-3) initial screening pre-processes and shoal of fish source

A, close current regulating gate, clean sea water is poured into screening plant, contributing region, Shou Yu areas, passageway area and temporarily Clean sea water is filled in foster area, and the water level of contributing region 1 is higher than the water level in Zan Yang areas；

B, clean sea water：20 DEG C -25 DEG C of water temperature, salinity 25-30, pH 7.8-8.3, more than the mg/litre of dissolved oxygen 4；

C, randomly select more than the same batch of tail of consortive group of flora little yellow croaker 5000 bred and cultivated with pond, it is desirable to which scale and fin ray are complete It is whole intact, move about active, disease-free and injury-free, be put into Zan Yang areas culturing pool, to avoid causing fish body to abrade because the shoal of fish is overstocked, Depending on the maximum temporarily foster density of the shoal of fish in shoal of fish Zan Yang areas culturing pool presses the specific body long size of alternative little yellow croaker, wherein averagely body The maximum temporarily foster density of the long 3-5cm shoal of fish must not exceed 800 tails/cubic meter, and the long 10cm-15cm of the average body shoal of fish is maximum temporarily to be supported Density must not exceed 200 tails/cubic meter, the average long 20cm-25cm of the body maximum temporarily foster density of the shoal of fish must not exceed 50 tails/cube Rice, long more than the 30cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 30 tails/cubic meter；

D, it is described randomly select with the consortive group of flora little yellow croaker for batch breeding and cultivating with pond must through processing of stopping eating, stop eating processing when Between be 2-3 days, be defined by draining excrement in fish body；

E, primary election is operated in night progress, to keep primary election place quiet, not by external interference, if must enter on daytime OK, then answer sunshade and control the light in work-yard, the alternative consortive group of flora little yellow croaker shoal of fish is kept relatively quiet, indoor illumination Control is within 500 luxs；

The initial screening of (1-4) shoal of fish

A, the shoal of fish is put into Zan Yang areas and is allowed to after keeping quite, and progressively opens current regulating gate, and slowly improve water Flow velocity degree, big minor adjustment water velocity is opened and closed by current regulating gate, the little yellow croaker shoal of fish for making to be put into Zan Yang areas is through of short duration It is in pushing up stream mode after adaptation；

Water (flow) direction is：Contributing region → Shou Yu areas → passageway area → Zan Yang areas；

Swimming direction is when the shoal of fish is screened：Zan Yang areas → passageway area → Shou Yu areas；

Contributing region water level should be consistently higher than Zan Yang areas water level, and water velocity during screening is to screen the little Huang in Qian Zanyang areas Fish is in top stream mode and is defined, and when all individuals of the little yellow croaker shoal of fish keep top stream mode, no longer improves water velocity；

B, after the little yellow croaker shoal of fish adapts to top stream 30 minutes, the fish-luring light for trapping the shoal of fish is opened in Shou Yu areas, it is described Intensity of light control is hung in Shou Yu areas in the lux of 1500 lux -2500, fish-luring light and attracting bait box；

C, fish-luring light 8 opens 15-30 minutes, and after confirming that bait breath has diffused to Zan Yang areas 4, opens all escape holes On cover plate, making each escape hole, be in can prevailing state；

D, when the little yellow croaker mantissa for entering Shou Yu areas reaches the 5% of alternative shoal of fish total amount, cover plate on closure escape hole, Current regulating gate is closed, primary election work is terminated, collects the little yellow croaker into Shou Yu areas, complete the initial screening of the shoal of fish, this is 5% small Yellow croaker mantissa is the high-quality Population that primary dcreening operation is elected, i.e., primary election rate is 5%；

(2) high-quality colony is selected eventually

On the basis of the high-quality colony of initial screening, i.e., on the basis of the shoal of fish of primary dcreening operation rate 5%, primary dcreening operation is elected into high-quality group The shoal of fish individual of body is weighed one by one, by the descending number sorting one by one of whose body weight, and before body weight is sorted 5% the shoal of fish Body is defined as selecting high-quality colony eventually, i.e., it is 5% individual in the high-quality colony of initial screening to select object eventually, and it is 0.25% to select rate eventually.

2nd, the screening technique is applied to the high-quality colony of different growth phases consortive group of flora little yellow croaker with the screening plant Screening.

3rd, the screening technique is applied to the screening of high-quality parent population with the screening plant, and screening object is female parent population When, on the basis of the escape capability and body weight screening, i.e., on the basis of selecting rate in the primary election rate and/or eventually, filter out The most aobvious golden yellow female individuals of body colour are as high-quality parent population.

4th, the screening technique can adjust the choice accuracy of the high-quality colony of consortive group of flora little yellow croaker, as improve choice accuracy, Primary election rate described in screening technique is adjusted to 1%-5% by 5%, and the end selects rate to be adjusted by 0.25% to 0.01%-0.25%, To reduce choice accuracy, primary election rate is adjusted to 5%-10% by 5%, selects rate to be adjusted by 0.25% to 0.25%-1% eventually.

5th, the screening technique can adjust the choice accuracy of high-quality parent population, as improve choice accuracy, this screening technique institute The primary election rate stated can be adjusted to 1%-5% by 5%, select rate to be adjusted by 0.25% to 0.01%-0.25% eventually, selected to reduce Precision, primary election rate can be adjusted to 5%-10% by 5%, select rate to be adjusted by 0.25% to 0.25%-1% eventually.

6th, when the screening size is limited by work-yard, then it should ensure that shoal of fish Zan Yang areas by the maximum temporarily foster density one It is secondary at least to accommodate 500 tail little yellow croakers, and by making more set screening plants, it is allowed to accommodate the total amount of the alternative little yellow croaker shoal of fish at least Reach 5000 tails or more, screened simultaneously with realizing, it is disposable to complete screening operation and ensure primary election reliability.

7th, the screening plant of the high-quality colony of a kind of little yellow croaker, the screening plant mainly by：Contributing region, Shou Yu areas, passageway Area, Zan Yang areas and water supply dynamical system are formed, and contributing region, Shou Yu areas, Ji Zanyang areas of passageway area are linked in sequence, each connection Place is in sealing state, and water supply dynamical system is connected with contributing region, and current tune is provided between the contributing region and Shou Yu areas Gate is saved, contributing region is tank structure, and Zan Yang areas are pond structure, and contributing region passes through current regulating gate and Shou Yu areas phase Connection, Shou Yu areas are connected with passageway area, and passageway area is connected with Zan Yang areas；

The housing in the Shou Yu areas is made by transparent material, rectangular channel-type structure, on the housing in Shou Yu areas Shou Yu areas dodge gate is provided with, Shou Yu areas dodge gate is in when closed sealing structure, is provided with the housing in Shou Yu areas Current regulating gate, fish-luring light and attracting bait box；

The fish-luring light is adjustable light quality and the watertight light fitting for trapping the shoal of fish of brightness, and its installation position is adjustable；

The attracting bait box is the hollow out plastic casing for launching special bait, and its installation position is adjustable；

The housing in the passageway area is made by transparent material, rectangular channel-type structure, on the housing in passageway area 3 Passageway area dodge gate is provided with, passageway area dodge gate is in when closed sealing structure, the fixed peace in the housing in passageway area The 15 of maximum specification length of fish body is should be greater than equipped with rack A, rack B, rack C, rack D and rack E, the length of passageway area 3 More than times, the rack adjacent spacing should be greater than more than 3 times of maximum specification length of fish body, the rack A, rack B, rack C, Rack D and rack E rectangular configuration and area and Cross-Section Rectangular structure in passageway area housing are identical with area；

The rack A is made up of framework and mesh sheet, there is 5 escape holes in the mesh sheet；

The rack B is made up of framework and mesh sheet, and 3 escape holes are provided with the mesh sheet；

The rack C is made up of framework and mesh sheet, and 2 escape holes are provided with the mesh sheet；

The rack D is made up of framework and mesh sheet, and 1 escape hole is provided with the mesh sheet；

The rack E is made up of framework and mesh sheet, and 1 escape hole is provided with the mesh sheet；

The mesh sheet is polyethylene mesh sheet, and its size of mesh is the high 1/9-1/4 of fish body body, each escape in the mesh sheet Hole shifts to install mutually at random, and the escape hole is only capable of accommodating 1 tail maximum specification little yellow croaker by the way that the escape hole is respectively positioned on water In, a cover plate that can cover the escape hole completely is respectively provided with each escape hole, to open and close escape hole.

8th, the line of centres in escape hole is not parallel with the longitudinal centre line in passageway area on the adjacent rack.

The beneficial effects of the invention are as follows：

After artificial screening method and its screening plant as a result of a kind of high-quality colony of little yellow croaker of the present invention, effectively Overcome using single traits as the group directional selection mode of selection target in the presence of the defects of, fundamentally ensure that selected small The quality of the high-quality colony of yellow croaker, i.e. selected little yellow croaker colony have optimal cultivation synthesis production performance, so as to thoroughly solve Current artificial screening seriously hysteresis and cultivation parent for many generations from numerous caused germplasm degenerate problem.The present invention is applied to difference The screening of the high-quality colony of growth phase consortive group of flora little yellow croaker, a kind of artificial screening method of the high-quality colony of little yellow croaker of the invention and Its screening plant, has that screening technique is easy directly perceived, installation cost is low, the selected high-quality shoal of fish have constitution is strong, be quick on the draw, The characteristics of escape capability is strong, the speed of growth is fast.

The above-mentioned high-quality colony of target obtained through artificial screening, both can be by reinforced cultivating, and being cultivated turns into high quality It is high-quality breed parent population, also can by acclimatization culture, cultivated as guiding and lead breeding blanket it is of the same race release the shoal of fish entrance " head fish " colony or " head fish " colony in artificial default feeding ground.

Brief description of the drawings

Fig. 1：It is a kind of three-dimensional structure diagram of the screening plant of the high-quality colony of little yellow croaker of the embodiment of the present invention one；

Fig. 2：It is Fig. 1 main structure figure；

Fig. 3：It is Fig. 1 overlooking structure figure；

Fig. 4：It is Fig. 2 A-A sectional structure charts；

Fig. 5：It is Fig. 3 B-B sectional structure charts；

Fig. 6：A kind of screening plant rack A structure charts of the high-quality colony of little yellow croaker of the present invention；

Fig. 7：A kind of screening plant rack B structure figure of the high-quality colony of little yellow croaker of the present invention；

Fig. 8：A kind of screening plant rack C-structure figure of the high-quality colony of little yellow croaker of the present invention；

Fig. 9：A kind of screening plant rack D structure charts of the high-quality colony of little yellow croaker of the present invention；

Figure 10：A kind of screening plant rack E structure charts of the high-quality colony of little yellow croaker of the present invention；

Figure 11：It is a kind of main structure figure of the screening plant of the high-quality colony of little yellow croaker of the embodiment of the present invention two；

Figure 12：It is Figure 11 overlooking structure figure.

In Fig. 1：1st, contributing region 2, Shou Yu areas 3, passageway area 4, Zan Yang areas 5, water supply dynamical system

6th, current regulating gate 7, Shou Yu areas dodge gate 8, fish-luring light 9, attracting bait box

10th, passageway area dodge gate 11, rack A 12, rack B 13, rack C

14th, rack D 15, rack E

In Fig. 2：1st, contributing region 2, Shou Yu areas 3, passageway area 4, Zan Yang areas

6th, current regulating gate

In Fig. 3：1st, contributing region 2, Shou Yu areas 3, passageway area 4, Zan Yang areas

5th, water supply dynamical system 6, current regulating gate

7th, Shou Yu areas dodge gate 10, passageway area dodge gate

In Fig. 4,5：1st, contributing region 2, Shou Yu areas 3, passageway area 4, Zan Yang areas

6th, current regulating gate 8, fish-luring light 9, attracting bait box

11st, rack A 12, rack B 13, rack C 14, rack D

15th, rack E

In Fig. 6：11st, rack A 11a, framework 11b, mesh sheet 11c, escape hole

In Fig. 7：12nd, rack B 12a, framework 12b, mesh sheet 12c, escape hole

In Fig. 8：13rd, rack C 13a, framework 13b, mesh sheet 13c, escape hole

In Fig. 9：14th, rack D 14a, framework 14b, mesh sheet 14c, escape hole

In Figure 10：15th, rack E 15a, framework 15b, mesh sheet 15c, escape hole

In Figure 11：1st, contributing region 2, Shou Yu areas 3, passageway area 4, Zan Yang areas

16th, valve 17, pipeline

In Figure 12：1st, contributing region 2, Shou Yu areas 3, passageway area 4, Zan Yang areas

5th, water supply dynamical system 7, Shou Yu areas dodge gate 10, passageway area dodge gate

16th, valve 17, pipeline

Embodiment

High-quality colony of the present invention refers to that using the consortive group of flora large sample shoal of fish as screening object, i.e. consortive group of flora shoal of fish individual is total Amount must be more than 5000 tails, the shoal of fish then obtained by the screening technique and screening plant of the present invention after artificial screening, claim Be to reach the target shoal of fish of small probability standard.

The target shoal of fish for reaching small probability standard is the high-quality colony of initial screening and/or whole screening high-quality colony, is reached The target number of fish school to small probability standard is the 1%-10% of the selected large sample number of fish school, the i.e. high-quality Population of initial screening For the 1%-10% of the consortive group of flora large sample number of fish school, referred to as primary election rate；Whole screening high-quality colony is the high-quality colony of initial screening The 1%-10% of quantity, it is referred to as to select rate eventually；If without particular/special requirement, the two 5% is advisable with taking, i.e., is preferred with 5%.

Embodiment one

As Figure 1-10 shows

A kind of artificial screening method of the high-quality colony of little yellow croaker, using seawater resources cultivation screening, it includes following base for it This method and step：

The high-quality colony of initial screening

The structure of screening plant and setting

The screening plant by：Contributing region 1, Shou Yu areas 2, passageway area 3, Zan Yang areas 4 and water supply dynamical system 5 are formed, Contributing region 1, Shou Yu areas 2, Ji Zanyang areas 4 of passageway area 3 are linked in sequence, and each junction is in sealing state, water supply dynamical system 5 It is connected with contributing region 1, current regulating gate 6 is provided between the contributing region 1 and Shou Yu areas 2, contributing region 1 is tank Structure, Zan Yang areas 4 are pond structure, and contributing region 1 is connected by current regulating gate 6 with Shou Yu areas 2, Shou Yu areas 2 and mistake Road area 3 is connected, and passageway area 3 is connected with Zan Yang areas 4；

The housing in the Shou Yu areas 2 is made by transparent material, rectangular channel-type structure, the housing in Shou Yu areas 2 On be provided with Shou Yu areas dodge gate 7, Shou Yu areas dodge gate 7 is in when closed sealing state, is pacified in the housing in Shou Yu areas 2 Equipped with current regulating gate 6, fish-luring light 8 and attracting bait box 9；

The current regulating gate 6 is used to adjust water velocity；

The fish-luring light 8 is adjustable light quality and the watertight light fitting for trapping the shoal of fish of brightness, and it is removable that its installation position is adjustable；

The attracting bait box 9 is the hollow out plastic casing for launching special bait, and it is removable that its installation position is adjustable；

The housing in the passageway area 3 is made by transparent material, rectangular channel-type structure, the housing in passageway area 3 On be provided with passageway area dodge gate 10, passageway area dodge gate 10 is in when closed sealing state, in the housing in passageway area 3 It is installed with rack A11, rack B12, rack C13, rack D14 and rack E15, the length of passageway area 3 and should be greater than maximum More than 15 times of specification length of fish body, the rack spacing should be greater than more than 3 times of maximum specification length of fish body, the rack A11, rack B12, rack C13, rack D14 and rack E15 rectangular configuration and area and the housing of passageway area 3 in Cross-Section Rectangular knot Structure is identical with area；

The rack A11 is made up of framework 11a and mesh sheet 11b, and 5 escapes have been randomly provided on the mesh sheet 11b Hole 11c；

The rack B12 is made up of framework 12a and mesh sheet 12b, and 3 escapes have been randomly provided on the mesh sheet 12b Hole 12c；

The rack C13 is made up of framework 13a and mesh sheet 13b, and 2 escapes have been randomly provided on the mesh sheet 13b Hole 13c；

The rack D14 is made up of framework 14a and mesh sheet 14b, and 1 escape has been randomly provided on the mesh sheet 14b Hole 14c；

The rack E15 is made up of framework 15a and mesh sheet 15b, and 1 escape has been randomly provided on the mesh sheet 15b Hole 15c；

The mesh sheet is polyethylene mesh sheet, and its size of mesh is the high 1/9-1/4 of fish body body, each escape in the mesh sheet Hole shifts to install mutually at random, and the escape hole is only capable of accommodating 1 tail maximum specification little yellow croaker calmly by the escape Kong Junwei Yu Shuizhong, a cover plate that can cover the escape hole completely is respectively provided with each escape hole, to open and close escape hole.

Screening plant inspection, cleaning and debugging

Check each rack installation and position；

Check the escape hole size and installation position in mesh sheet；

Check the quantity of attracting bait box 9, installation position and be put into bait in box；

Check the quantity of fish-luring light 8 and installation position；

Check water supply dynamical system 5, it is necessary to assure current supply during screening under the stream mode of shoal of fish top；

Current regulating gate 6 is checked, and is closed；

Screening plant can be washed down after normal use with clean sea water by completing above-mentioned review and validate, the clean sea water Water quality, the NY5052-2001 pollution-free food used in mariculture water water quality of The Ministry of Agriculture of the People's Republic of China, MOA 2001 editions should be met Standard requirement；

Close Shou Yu areas dodge gate 7 and passageway area dodge gate 10 and seal.

Initial screening pre-processes and shoal of fish source

Close current regulating gate 6, clean sea water poured into screening plant, contributing region 1, Shou Yu areas 2, passageway area 3 and Clean sea water is filled in Zan Yang areas 4, and the water level of contributing region 1 is higher than the water level in Zan Yang areas 4；

Clean sea water：20 DEG C -25 DEG C of water temperature, salinity 25-30, pH 7.8-8.3, more than the mg/litre of dissolved oxygen 4；

Randomly select more than the same batch of tail of consortive group of flora little yellow croaker 5000 bred and cultivated with pond, it is desirable to which scale and fin ray are complete It is intact, move about active, disease-free and injury-free, be put into the culturing pool of Zan Yang areas 4, to avoid causing fish body to abrade because the shoal of fish is overstocked, Depending on the maximum temporarily foster density of the shoal of fish in the culturing pool of shoal of fish Zan Yang areas 4 should be by the specific body long size of alternative little yellow croaker, wherein flat The long 3-5cm of the equal body maximum temporarily foster density of the shoal of fish must not exceed 800 tails/cubic meter, and the long 10cm-15cm of the average body shoal of fish is maximum Temporarily foster density must not exceed 200 tails/cubic meter, the long 20cm-25cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 50 tails/ Cubic meter, long more than the 30cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 30 tails/cubic meter；Work-yard by limited time, It then should ensure that shoal of fish Zan Yang areas 4 can once be accommodated 500 tail above little yellow croakers by above-mentioned density, and chosen to install by making more bushing screens Put, the total amount for being allowed to accommodate the alternative little yellow croaker shoal of fish reaches more than 5000 tails, is screened simultaneously with realizing, disposable to complete screening work Make and ensure primary election reliability；

Described randomly select must be stopped eating processing time with batch consortive group of flora little yellow croaker for breeding and being cultivated with pond through processing of stopping eating For 2-3 days, it is defined by draining excrement in fish body；

Primary election is operated in night progress, to keep primary election place quiet, not by external interference, and if must be carried out on daytime, Then answer sunshade and control the light in work-yard, the alternative consortive group of flora little yellow croaker shoal of fish is kept relatively quiet, indoor illumination control System is within 500 luxs.

Lux is generally abbreviated as lx or LX, also known as meter-candle, is the unit of international units system of a mark illumination, and l flows Bright luminous flux is evenly distributed on the illumination on 1 square metre of area, is exactly 1 lux.

The initial screening of the shoal of fish

The shoal of fish is put into Zan Yang areas 4 and is allowed to after keeping quite, and progressively opens current regulating gate 6, and slowly improve water Flow velocity degree, big minor adjustment water velocity is opened and closed by current regulating gate 6, the little yellow croaker shoal of fish that can make to be put into Zan Yang areas 4 passes through It is in pushing up stream mode after of short duration adaptation；

Water (flow) direction is：2 → passageway area, 3 → Zan Yang areas of contributing region 1 → Shou Yu areas 4；

Swimming direction is when the shoal of fish is screened：4 → passageway area of Zan Yang areas, 3 → Shou Yu areas 2；

The water level of contributing region 1 should be consistently higher than the water level of Zan Yang areas 4, and water velocity during screening is to screen in Qian Zanyang areas 4 Little yellow croaker is in top stream mode and is defined, and when all individuals of the little yellow croaker shoal of fish keep top stream mode, does not improve further Water velocity；

After the little yellow croaker shoal of fish adapts to top stream 30 minutes, the fish-luring light 8 for trapping the shoal of fish, light are opened in Shou Yu areas 2 Strength control is in 1500lx-2500lx, and fish-luring light 8 and the hanging side by side of attracting bait box 9 are in water in Shou Yu areas 2 at 1/2 height；

Fish-luring light 8 opens 15-30 minutes, and after confirming that bait breath has diffused to Zan Yang areas 4, opens on all escape holes Cover plate, make it is each escape hole be in exposed prevailing state；

When the little yellow croaker mantissa for entering Shou Yu areas 2 reaches the 5% of alternative shoal of fish total amount, the lid on the hole of closure escape immediately Plate, the termination primary election work of current regulating gate 6 is closed, collect the little yellow croaker into Shou Yu areas 2, complete the initial screening of the shoal of fish, this 5% is the high-quality colony that primary dcreening operation is elected, i.e., primary election rate is 5%.

High-quality colony is selected eventually

This screening technique is applied to the screening of the high-quality colony of different growth phases consortive group of flora little yellow croaker with screening plant.

This screening technique can adjust the choice accuracy of the high-quality colony of consortive group of flora little yellow croaker, as improve choice accuracy, this sieve Each screening rate described in choosing method can be also adjusted to 1%-5% by 5%, i.e., select rate to be adjusted by 0.25% to 0.01%- eventually 0.25%, to reduce choice accuracy, each screening rate can be also adjusted to 5%-10% by 5%, i.e., select rate can be by 0.25% eventually Adjust to 0.25%-1%.

This screening technique is applied to the screening of high-quality parent population with screening plant, when screening object is female parent population, described On the basis of escape capability and body weight are selected, i.e., on the basis of selecting rate in the primary dcreening operation rate and/or eventually, filter out the most aobvious gold of body colour The female individuals of yellow are as high-quality parent population.

A kind of screening plant of the high-quality colony of little yellow croaker, the screening plant by：Contributing region 1, Shou Yu areas 2, passageway area 3, Zan Yang areas 4 and water supply dynamical system 5 are formed, and contributing region 1, Shou Yu areas 2, Ji Zanyang areas 4 of passageway area 3 are linked in sequence, described each Junction is in sealing state, and water supply dynamical system 5 is connected with contributing region 1, is provided with the Shou Yu areas 2 close to contributing region 1 Current regulating gate 6, contributing region 1 are tank structure, and Zan Yang areas 4 are pond structure, and contributing region 1 passes through current regulating gate 6 are connected with Shou Yu areas 2, and Shou Yu areas 2 are connected with passageway area 3, and passageway area 3 is connected with Zan Yang areas 4；

The housing in the Shou Yu areas 2 is made by transparent material, rectangular channel-type structure, the housing in Shou Yu areas 2 On be provided with Shou Yu areas dodge gate 7, Shou Yu areas dodge gate 7 is in when closed sealing structure, is pacified in the housing in Shou Yu areas 2 Equipped with current regulating gate 6, fish-luring light 8 and attracting bait box 9；

The housing in the passageway area 3 is made by transparent material, rectangular channel-type structure, the housing in passageway area 3 On be provided with passageway area dodge gate 10, passageway area dodge gate 10 is in when closed sealing structure, in the housing in passageway area 3 It is installed with rack A11, rack B12, rack C13, rack D14 and rack E15, the length of passageway area 3 and should be greater than maximum More than 15 times of specification length of fish body, the rack spacing should be greater than more than 3 times of maximum specification length of fish body, the rack A11, rack B12, rack C13, rack D14 and rack E15 rectangular configuration and area and the housing of passageway area 3 in Cross-Section Rectangular knot Structure is identical with area；

P values are equal to 0.05 as in agricultural experiment research by the present invention according to the actual impossibility principle of small probability event One of small probability standard, that is to say, that P values can be equal to 0.05 be considered as high-quality colony under large sample level select threshold value, i.e., According to selection target, superseded wherein 95% individual, the high-quality colony that remaining 5% individual is classified as primary election and/or selected eventually.

The present invention is applied to the screening of the high-quality colony of different growth phases consortive group of flora little yellow croaker, and the present invention can be according to actual need Ask, the appropriate choice accuracy for adjusting the high-quality colony of consortive group of flora little yellow croaker, as improving choice accuracy can be as shown in each choice phase 95% mortality adjust to 99%, for reduce choice accuracy can also be adjusted as 95% mortality shown in each choice phase to 90%, 95% mortality can be adjusted to 99% by as improving choice accuracy, it is on the contrary then 95% mortality can be adjusted to 90%.

The present invention using knot all living creatures possessed by little yellow croaker is living, top stream and " the broken fish of net escapes " habit against the current, and be aided with light, Bait lures the effect of drawing, and attracts the high-quality strong individual of consortive group of flora of artificial culture to swim five nets continuously set through screening plant rapidly Frame, five racks are from the close-by examples to those far off set gradually from shoal of fish Zan Yang areas, and respectively on per pass rack set 5 escape holes, 3 escape Ease hole, 2 escape holes, 1 escape hole and 1 escape hole, each escape hole can only hold 1 tail little yellow croaker calmly by adjacent net Escape hole line between piece is not parallel with the horizontal longitudinal center axis of screening plant, and can manual control each escape the opening of hole Close, and the preferred individual into before Shou Yu areas 5% is defined as the high-quality colony of primary election, bait built in Shou Yu areas and attracting light fixture.

The specific preparation method of rack is：Cut and the wide contour polyethylene mesh sheet of screening plant inner section size, outer edge It is seamless to be fixed in the screening plant shown in Fig. 1 after polyethylene rack is made in frame, the size of mesh control of selected polyethylene mesh sheet For system in the high 1/10-1/3 of fish body body, material used in frame requires nontoxic, can be plank, plastic plate, steel, rubber slab In one kind, being cut after fixed with surgical scissors in polyethylene rack can only hold what 1 tail fish passed through calmly, and with smooth steel ring Fixed-type escape hole, each plug-in one of hole of escaping can cover the cover plate in escape hole completely, and cover plate is interior edge polythene net The smooth steel ring of piece, to open and close escape hole, the line in each adjacent escape hole is not parallel with the horizontal longitudinal center axis of device.

Collect primary election high-quality colony, weighed one by one after numbering, and it is descending sort successively, by body in the high-quality colony of primary election The end that 5% individual is defined as finally being selected in before reordering selects high-quality colony.

Whole screening plant mainly includes：Contributing region, Shou Yu areas, passageway area, four, Zan Yang areas region, its major function point It is not：

Zan Yang areas：For temporarily supporting the alternative shoal of fish, to avoid causing fish body to abrade because the shoal of fish is overstocked, the maximum temporarily foster density of the shoal of fish Depending on should be by the specific body long size of alternative little yellow croaker, wherein the maximum temporarily foster density of the averagely long 3-5cm of the body shoal of fish must not exceed 800 tails/cubic meter, the long 10cm-15cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 200 tails/cubic meter, average body length The maximum temporarily foster density of the 20cm-25cm shoal of fish must not exceed 50 tails/cubic meter, and long more than the 30cm of the average body shoal of fish is maximum temporarily to be supported Density must not exceed 30 tails/cubic meter；

Passageway area：For high-quality individual primary election in the shoal of fish.The overall length requirement of passageway area is more than 15 times of length of fish body, 5 racks are fixed in the area of passageway, spacing is more than 3 times of length of fish body between rack is adjacent, and hole of being escaped between adjacent rack Between line it is not parallel with the horizontal longitudinal center axis of device, hole of each escaping during primary election is in below water level.

Shou Yu areas：For trapping and collecting the shoal of fish, it is provided for launching the attracting bait box of bait and adjustable in Shou Yu areas Light quality and brightness are saved to trap the attracting light fixture of the shoal of fish, attracting bait box is hollow out plastic casing, and attracting light fixture is watertight light fitting, is engraved The installation position of empty plastic casing and watertight light fitting is adjustable removable.

Contributing region：Water pump water supply system is set, for providing current and flow velocity, control, water velocity when regulation is selected, The spotted maigre for selecting Qian Zanyang areas is set to be in top stream mode.

Water (flow) direction is：Contributing region → Shou Yu areas → passageway area → Zan Yang areas.

Swimming direction is when the shoal of fish is screened：Zan Yang areas → passageway area → Shou Yu areas.

Water level：In screening, contributing region water level should be consistently higher than Zan Yang areas water level more than 10-20 centimetres.

To avoid causing fish body to abrade because the shoal of fish is overstocked, temporarily foster density should be by standby for the maximum of the alternative shoal of fish in shoal of fish Zan Yang areas Depending on the specific body long size for selecting the little yellow croaker shoal of fish, wherein the maximum temporarily foster density of the averagely long 3-5cm of the body shoal of fish must not exceed 800 Tail/cubic meter, the long 10cm-15cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 200 tails/cubic meter, average body length The maximum temporarily foster density of the 20cm-25cm shoal of fish must not exceed 50 tails/cubic meter, and long more than the 30cm of the average body shoal of fish is maximum temporarily to be supported Density must not exceed 30 tails/cubic meter, if work-yard conditions permit, it should be ensured that shoal of fish Zan Yang areas can be by above-mentioned maximum temporarily foster close Degree accommodate 5000 tails more than the alternative shoal of fish, if work-yard condition is limited, also should ensure that shoal of fish Zan Yang areas can by it is above-mentioned this Density once accommodates 500 tail above little yellow croakers, and by making multiple device frames, makes the total of the alternative shoal of fish in shoal of fish Zan Yang areas Amount reach more than 5000 tails, with disposably complete primary election work and ensure screening reliability.

Check whether the firmness of polyethylene rack installation in screening plant, and escape hole size accord with installation position Close and require.

Check whether hollow out plastic casing is intact, and can watertight light fitting and water pump water supply system normal operation.

Randomly selected in plant with criticizing more than little yellow croaker consortive group of flora 5000 tails of healthy and strong individual bred and cultivated with pond, Ask physical strong, scale and fin ray perfect, move about active, disease-free and injury-free.

It is put into the shoal of fish Zan Yang areas shown in Fig. 1, the alternative shoal of fish after processing of stopping eating empties internal excrement to avoid Cause fish body to abrade because the shoal of fish is overstocked, in Zan Yang areas the maximum temporarily foster density of the shoal of fish should by the specific body long size of alternative little yellow croaker and It is fixed, wherein the maximum temporarily foster density of the averagely long 3-5cm of the body shoal of fish must not exceed 800 tails/cubic meter, the long 10cm-15cm of average body The maximum temporarily foster density of the shoal of fish must not exceed 200 tails/cubic meter, the long 20cm-25cm of the average body maximum temporarily foster density of the shoal of fish is not Must be more than 50 tails/cubic meter, long more than the 30cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 30 tails/cubic meter.

Embodiment two

As depicted in figs. 11-12, screening plant can also be following structure type.

The screening plant by：Contributing region 1, Shou Yu areas 2, passageway area 3, Zan Yang areas 4, water supply dynamical system 5, valve 16 and Pipeline 17 is formed, and water supply dynamical system 5 is connected and connected with contributing region 1, and contributing region 1 is by valve 16 and pipeline 17 with receiving Fish area 2 is connected and connected, and Shou Yu areas 2 are connected and connected with passageway area 3, and passageway area 3 is connected and connected with Zan Yang areas 4, Each junction is in sealing state, and contributing region 1 is tank structure, and Zan Yang areas 4 are pond structure.

The housing in the Shou Yu areas 2 is made by transparent material, rectangular channel-type structure, the housing in Shou Yu areas 2 On be provided with Shou Yu areas dodge gate 7, Shou Yu areas dodge gate 7 is in when closed sealing state, is pacified in the housing in Shou Yu areas 2 Equipped with fish-luring light 8 and attracting bait box 9.

The valve 16 is used to adjust water velocity.

In the present embodiment two valve 16 act on, application method it is identical with the current regulating gate 6 in embodiment one.

It is the other structures of screening plant and screening operation method in the present embodiment two, identical with embodiment one using step.

Claims

1. a kind of artificial screening method of the high-quality colony of little yellow croaker, it is screened using sea-farming resource and device, and its feature exists In：It includes following basic skills and step：

(1) the high-quality colony of initial screening

The setting of (1-1) screening plant

The screening plant mainly by：Contributing region (1), Shou Yu areas (2), passageway area (3), Zan Yang areas (4) and water supply dynamical system (5) formed, contributing region (1), Shou Yu areas (2), passageway area (3) Ji Zanyang areas (4) are linked in sequence, and each junction is in sealing State, water supply dynamical system (5) are connected with contributing region (1), are set between the contributing region (1) and the Shou Yu areas (2) There is current regulating gate (6), contributing region (1) is tank structure, and Zan Yang areas (4) are pond structure, and contributing region (1) passes through water Stream regulating gate (6) is connected with Shou Yu areas (2), and Shou Yu areas (2) are connected with passageway area (3), passageway area (3) and Zan Yang areas (4) it is connected；

Shou Yu areas dodge gate (7) is provided with the housing of the Shou Yu areas (2), water is installed in the housing of Shou Yu areas (2) Flow regulating gate (6), fish-luring light (8) and attracting bait box (9)；

Passageway area dodge gate (10) is provided with the housing of the passageway area (3), is fixedly mounted in the housing of passageway area (3) There are rack A (11), rack B (12), rack C (13), rack D (14) and rack E (15), escape is provided with each rack Hole, a cover plate that can cover the escape hole completely is respectively provided with each escape hole, to open and close escape hole；

The inspection of (1-2) screening plant, cleaning and debugging

A, each rack installation and position are checked；

C, attracting bait box (9) quantity, installation position are checked and is put into bait in box；

D, fish-luring light (8) quantity and installation position are checked；

E, water supply dynamical system (5) is checked, it is necessary to assure current supply during screening under the stream mode of shoal of fish top；

F, current regulating gate (6) is checked, and is closed；

G, screening plant, the water of the clean sea water can be washed down after normal use with clean sea water by completing above-mentioned review and validate Matter, the NY5052-2001 pollution-free food used in mariculture water water quality marks of The Ministry of Agriculture of the People's Republic of China, MOA 2001 editions should be met Alignment request；

H, Shou Yu area's dodge gates (7) are closed and passageway area dodge gate (10) and are sealed；

(1-3) initial screening pre-processes and shoal of fish source

A, current regulating gate (6) is closed, clean sea water is poured into screening plant, contributing region (1), Shou Yu areas (2), passageway area (3) Ji Zanyang areas (4) fill clean sea water, and the water level of contributing region (1) is higher than the water level of Zan Yang areas (4)；

B, clean sea water：20 DEG C -25 DEG C of water temperature, salinity 25-30, pH7.8-8.3, more than the mg/litre of dissolved oxygen 4；

C, randomly select more than the same batch of tail of consortive group of flora little yellow croaker 5000 bred and cultivated with pond, it is desirable to scale and the complete nothing of fin ray Lack, move about active, disease-free and injury-free, be put into Zan Yang areas (4) culturing pool, to avoid causing fish body to abrade because the shoal of fish is overstocked, Depending on the maximum temporarily foster density of the shoal of fish is by the specific body long size of alternative little yellow croaker in shoal of fish Zan Yang areas (4) culturing pool, wherein average The maximum temporarily foster density of the long 3-5cm of the body shoal of fish must not exceed 800 tails/cubic meter, and the long 10cm-15cm of the average body shoal of fish is maximum temporarily Foster density must not exceed 200 tails/cubic meter, and the average long 20cm-25cm of the body maximum temporarily foster density of the shoal of fish must not exceed 50 tails/vertical Square rice, long more than the 30cm of the average body maximum temporarily foster density of the shoal of fish must not exceed 30 tails/cubic meter；

D, described randomly select must be through processing of stopping eating with the consortive group of flora little yellow croaker for batch breeding and cultivating with pond, and processing time of stopping eating is 2-3 days, it is defined by draining excrement in fish body；

E, primary election is operated in night progress, to keep primary election place quiet, not by external interference, and if must be carried out on daytime, Answer sunshade and control the light in work-yard, the alternative consortive group of flora little yellow croaker shoal of fish is kept relatively quiet, indoor illumination control Within 500 luxs；

The initial screening of (1-4) shoal of fish

A, the shoal of fish is put into Zan Yang areas (4) and is allowed to after keeping quite, and progressively opens current regulating gate (6), and slowly improve Water velocity, big minor adjustment water velocity is opened and closed by current regulating gate (6), makes the spotted maigre fish being put into Zan Yang areas (4) Group is in pushing up stream mode after of short duration adaptation；

Water (flow) direction is：Contributing region (1) → Shou Yu areas (2) → passageway area (3) → Zan Yang areas (4)；

Swimming direction is when the shoal of fish is screened：Zan Yang areas (4) → passageway area (3) → Shou Yu areas (2)；

Contributing region (1) water level should be consistently higher than Zan Yang areas (4) water level, and water velocity during screening is to screen in Qian Zanyang areas (4) Little yellow croaker be in push up stream mode be defined, when the little yellow croaker shoal of fish it is all individual keep top stream mode when, no longer improve current Speed；

B, after the little yellow croaker shoal of fish adapts to top stream 30 minutes, the fish-luring light (8) for trapping the shoal of fish, institute are opened in Shou Yu areas (2) The intensity of light control of fish-luring light (8) is stated in the lux of 1500 lux -2500, fish-luring light (8) and attracting bait box (9) suspension In Shou Yu areas (2)；

C, fish-luring light (8) opens 15-30 minutes, and after confirming that bait breath has diffused to Zan Yang areas (4), opens all escape holes On cover plate, making each escape hole, be in can prevailing state；

D, when enter Shou Yu areas (2) little yellow croaker mantissa reach the 5% of the alternative shoal of fish total amount when, closure escape hole on cover plate, Current regulating gate (6) is closed, primary election work is terminated, collects the little yellow croaker into Shou Yu areas (2), complete the initial screening of the shoal of fish, This 5% little yellow croaker mantissa is the high-quality Population that primary dcreening operation is elected, i.e., primary election rate is 5%；

(2) high-quality colony is selected eventually

On the basis of the high-quality colony of initial screening, i.e., on the basis of the shoal of fish of primary dcreening operation rate 5%, primary dcreening operation is elected into high-quality colony Shoal of fish individual is weighed one by one, by the descending number sorting one by one of whose body weight, and before body weight is sorted 5% shoal of fish individual really It is set to and selects high-quality colony eventually, i.e., it is 5% individual in the high-quality colony of initial screening to select object eventually, and it is 0.25% to select rate eventually.

A kind of 2. artificial screening method of the high-quality colony of little yellow croaker according to claim 1, it is characterised in that：The screening Method is applied to the screening of the high-quality colony of different growth phases consortive group of flora little yellow croaker with the screening plant.

A kind of 3. artificial screening method of the high-quality colony of little yellow croaker according to claim 1, it is characterised in that：The screening Method and the screening plant are applied to the screening of high-quality parent population, when screening object be female parent population, the escape capability with On the basis of body weight screening, i.e., on the basis of selecting rate in the primary election rate and/or eventually, filter out the most aobvious golden yellow female of body colour Body is as high-quality parent population.

A kind of 4. artificial screening method of the high-quality colony of little yellow croaker according to claim 1 or 2, it is characterised in that：It is described Screening technique can adjust the choice accuracy of the high-quality colony of consortive group of flora little yellow croaker, as improve choice accuracy, described in screening technique just Rate is selected to be adjusted by 5% to 1%-5%, the end selects rate to be adjusted by 0.25% to 0.01%-0.25%, to reduce choice accuracy, Primary election rate is adjusted to 5%-10% by 5%, selects rate to be adjusted by 0.25% to 0.25%-1% eventually.

A kind of 5. artificial screening method of the high-quality colony of little yellow croaker according to claim 1 or 3, it is characterised in that：It is described Screening technique can adjust the choice accuracy of high-quality parent population, as improve choice accuracy, and primary election rate described in screening technique is by 5% adjustment To 1%-5%, the end selects rate to be adjusted by 0.25% to 0.01%-0.25%, and to reduce choice accuracy, primary election rate is adjusted by 5% It is whole to 5%-10%, select rate to be adjusted by 0.25% to 0.25%-1% eventually.

A kind of 6. artificial screening method of the high-quality colony of little yellow croaker according to claim 1, it is characterised in that：The screening When plant bulk is limited by work-yard, then it should ensure that shoal of fish Zan Yang areas (4) are once at least accommodated by the maximum temporarily foster density 500 tail little yellow croakers, and by making more set screening plants, the total amount for being allowed to accommodate the alternative little yellow croaker shoal of fish is at least up to 5000 tails Or more, screened simultaneously with realizing, it is disposable to complete screening operation and ensure primary election reliability.

A kind of 7. screening plant of the high-quality colony of little yellow croaker, it is characterised in that：The screening plant by：Contributing region (1), Shou Yu areas (2), passageway area (3), Zan Yang areas (4) and water supply dynamical system (5) are formed, contributing region (1), Shou Yu areas (2), passageway area (3) Ji Zanyang areas (4) are linked in sequence, and each junction is in sealing state, and water supply dynamical system (5) is connected with contributing region (1), Current regulating gate (6) is provided between the contributing region (1) and the Shou Yu areas (2), contributing region (1) is tank knot Structure, Zan Yang areas (4) are pond structure, and contributing region (1) is connected by current regulating gate (6) with Shou Yu areas (2), Shou Yu areas (2) it is connected with passageway area (3), passageway area (3) are connected with Zan Yang areas (4)；

The housing of the Shou Yu areas (2) is made by transparent material, rectangular channel-type structure, the housing in Shou Yu areas (2) On be provided with Shou Yu areas dodge gate (7), Shou Yu areas dodge gate (7) is in sealing structure when closed, the shell in Shou Yu areas (2) Current regulating gate (6), fish-luring light (8) and attracting bait box (9) are installed in vivo；

The fish-luring light (8) is adjustable light quality and the watertight light fitting for trapping the shoal of fish of brightness, and its installation position is adjustable；

The attracting bait box (9) is the hollow out plastic casing for launching special bait, and its installation position is adjustable；

The housing of the passageway area (3) is made by transparent material, rectangular channel-type structure, the housing in passageway area (3) On be provided with passageway area dodge gate (10), passageway area dodge gate (10) is in sealing structure when closed, in passageway area (3) Rack A (11), rack B (12), rack C (13), rack D (14) and rack E (15), the passageway area are installed with housing (3) length should be greater than more than 15 times of maximum specification length of fish body, and the rack adjacent spacing should be greater than maximum specification fish length More than 3 times of degree, the rack A (11), rack B (12), rack C (13), rack D (14) and rack E (15) rectangular configuration It is identical with area with area and Cross-Section Rectangular structure in passageway area (3) housing；

The rack A (11) is made up of framework (11a) and mesh sheet (11b), and 5 escapes are provided with the mesh sheet (11b) Hole (11c)；

The rack B (12) is made up of framework (12a) and mesh sheet (12b), and 3 escapes are provided with the mesh sheet (12b) Hole (12c)；

The rack C (13) is made up of framework (13a) and mesh sheet (13b), and 2 escapes are provided with the mesh sheet (13b) Hole (13c)；

The rack D (14) is made up of framework (14a) and mesh sheet (14b), and 1 escape is provided with the mesh sheet (14b) Hole (14c)；

The rack E (15) is made up of framework (15a) and mesh sheet (15b), and 1 escape is provided with the mesh sheet (15b) Hole (15c)；

The mesh sheet is polyethylene mesh sheet, and its size of mesh is the high 1/9-1/4 of fish body body, and each escape hole in the mesh sheet is mutual Mutually shift to install at random, it is described escape hole be only capable of accommodate 1 tail maximum specification little yellow croaker by, it is described escape hole be respectively positioned in water, A cover plate that can cover the escape hole completely is respectively provided with each escape hole, to open and close escape hole.

A kind of 8. screening plant of the high-quality colony of little yellow croaker according to claim 7, it is characterised in that：The adjacent rack The line of centres in upper escape hole is not parallel with the longitudinal centre line of passageway area (3).