CN105010193A

CN105010193A - Pond cultivation method for current-year fries of half-bred takifugu

Info

Publication number: CN105010193A
Application number: CN201510448015.9A
Authority: CN
Inventors: 张年国; 潘桂平; 周文玉; 周裕华; 刘本伟; 侯文杰; 毕浩
Original assignee: Shanghai Fisheries Research Institute
Current assignee: Shanghai Fisheries Research Institute
Priority date: 2015-07-27
Filing date: 2015-07-27
Publication date: 2015-11-04
Anticipated expiration: 2035-07-27
Also published as: CN105010193B

Abstract

The invention discloses a pond cultivation method for current-year fries of half-bred takifugu, and the method is characterized in that the method comprises the steps: carrying out desilting and disinfecting of a pond before the fries are put in the pond; splashing compound fertilizer cultivation biology baits after water enters into the pond, wherein the body length of each fry needs to be greater than 8 mm, and the activity of the fries is high; enabling the water salinity of the pond to be gradually increased to the pond cultivation salinity before the fries are put in the pond, wherein the fries needs to be in water for carrying, and the cultivation density of the fries is 4500/1000 square meters; casting no bait at the initial stage of fry throwing; splashing soybean milk and frozen big artemias when the biology baits in the pond is not sufficient, thereby reducing the mutual killing of the fries, and improving the survival rate of the fries; casting cluster eel cooperation baits after the body length of the fries reaches 20mm; changing water one time per 15 days at the early stage of cultivation; adjusting the water-changing frequency to be one time per 7 days at the middle and later stages of cultivation; splashing a biological agent into the pond in a cultivation process, so as to prevent parasites; transferring half-bred fishes to a thermal-insulation greenhouse for overwintering when the temperature of water in the pond decreases to 18 DEG C or less, wherein the catching mode is a mode of trawling, and a knotless net is used for trawling, thereby avoiding the scratching damage to the fish body.

Description

A kind of hybridization Fugu seed pond breeding method then

Technical field

The present invention relates to technical field of aquaculture, especially hybridize Fugu seed pond breeding method.

Background technology

Fugu obscurus (Takifugu obscurus) and the yellow Fugu (Takifugu flavidus) of chrysanthemum are all under the jurisdiction of Tetraodontiformes (Tetraodontif-ormes), Molidae (Tetraodontidae), Fugu genus (Fugu).Fugu obscurus is that warm water borne base migration fishes are warmed up in coastal waters, is mainly distributed in the East China Sea and the Yellow Sea, region, the middle and lower reach of Yangtze River in China, and parent population anadromous migration entered fresh water rivers tributary and bred spring, and juvenile fish is fattened in fresh water; The yellow Fugu of chrysanthemum is commonly called as ship bar, babysbreath, is mainly distributed in the coastal immediate offshore area of northwest Pacific, is mainly distributed in the marine site such as the East China Sea and the Yellow Sea and the Bohai Sea in China, belong to coastal waters, temperate zone demersal fishes.Increasingly mature in recent years along with cultural technique, the cultivation scale of fugu obscurus and the yellow Fugu of chrysanthemum is also in continuous expansion, both self-characteristics determine its cultivation future, fugu obscurus fast growth, 1-2 just can reach listing requirement, but comparatively the yellow Fugu of chrysanthemum is low for its economic worth, although the yellow Fugu of chrysanthemum is worth higher, but its growth rate comparatively fugu obscurus is slow, just can reach commercial specification after general 3 years, therefore develop that a kind of fast growth, market acceptance are high, cultivation is worth large new varieties and just seems particularly important.

According to hybrid organisms characteristic, if fugu obscurus and the yellow Fugu of chrysanthemum are hybridized, gene are reconfigured, through directive breeding, be expected to obtain the crossbreed possessing parent both sides' merit or produce parent unexistent new merit, namely cultivate fast growth, individual large, meat is good and the river Puffer with extensive market acceptance cultivates new varieties.At present the research report of relevant Fugu hybridization aspect is less, mainly concentrates on the kinds such as chrysanthemum yellow Fugu, Fugu rubripes, yellowfin Fugu, and hybridizes F about fugu obscurus raun and chrysanthemum Huang Fugu milter ₁open report is then there is not yet for pond rearing method.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of hybridization Fugu seed pond breeding method then; solve fugu obscurus raun and chrysanthemum yellow Fugu milter hybrid seedlings large-scale cultivation to produce, improve and cultivate survival rate and be convenient to manage, for the large-scale promotion of hybridization Fugu provides technical support.

Technical scheme of the present invention by pond selection, fertilising of cleaning up the pond, seed is thrown in, pond manages, disease control and fish for step and form, it is characterized in that pond is selected in the place had a good transport service, water quality is good, pond require environment quiet, have abundant water resources pollution-free, aspect ratio is 2:1, water level remains on more than 150cm, enter draining convenient, discharge outlet is arranged prevents escaping filter screen, need to sterilize to pond desilting before seed is put in a suitable place to breed, sterilization quicklime, consumption is 90-150kg/1000 ㎡, full pool spilling head after change water, pond water inlet employing 80 mesh sieve tulle bag filtration, after the 100cm that adds water, compound fertilizer of splashing in pond carries out rich water and cultivates basic biological feed, consumption is 7.5kg/1000 ㎡, carries out imposing composite fertilizer according to water body color, makes water body be dark brown or yellow green, the seed body length of throwing in need reach more than 8mm, energy is strong, and salinize is to pond culture salinity gradually by seedling pool inner water body salinity to put Miao Qianxu, and seed needs the operation of band water moving in process, and seed breeding density is 4500 tail/1000 ㎡, pond management throws in not bait throwing in substantially in initial stage 1-6 days in seed, by the underlying biological bait in pond waters, if when in pond, underlying biological bait is not enough, by soya-bean milk of splashing, freezing large halogen worm, reduce seed to cut one another's throat, to improve the survival rate of hybridization Fugu seed, reach to throw something and feed gradually after 20mm until seed body and be processed into the eel mixed bait of bulk, bait throwing in twice every day, bait feeding volume in the morning accounts for whole day 60%, account for 40% in the afternoon, summer feeding volume to account for fish body weight ratio few compared with spring and autumn, every day, feeding volume adjusted at any time by material feeding situation, to eat up in after bait throwing in 2 hours as in right amount, pond change of water quality and material feeding situation is observed in daily management, in 45 days after seed is put in a suitable place to breed, water is changed once every 15 days, each quantity of exchanged water is 30%, within 46 days, rise until before fishing for, change water frequency and be adjusted to 7 days once, each 50%, disease control is splashed every 15 days substrate modifier in whole breeding process in cultivating pool commercially available (efficient substrate clear, white+black matrix change king) and EM bacteria microorganism preparation, the parasitic argulus of prevention fish body, when carrying out medical treatment, preferential use EM bacteria microorganism preparation, time below pond water temperature drop to 18 DEG C, just hybridization fish will be transferred to heat preservation greenhouse and survive the winter, fishing style adopts trawl type, and trawlnet adopts knotless net, avoids fish body skin abrasion.

The fugu obscurus raun of the invention and the yellow Fugu milter of chrysanthemum hybridize F ₁remarkable result is achieved in force for pond rearing method; the large-scale production utilizing outdoor ponds ecological method to carry out yellow Fugu (♂) hybrid seedlings of fugu obscurus (♀) × chrysanthemum is cultivated; make its survival rate to more than 90%; in pond culture process; hybridize that Fugu is individual large, growth is fast, premunition is strong 1 age; body weight be his father, maternal 1.5 times, there is obvious hybrid vigour, be expected to cultivate hybridization Fugu new lines.

Embodiment

In order to make technological means of the invention process be easy to understand, set forth further below in conjunction with instantiation, instantiation comprises the following steps:

1, pond is selected in the place had a good transport service, water quality is good, and pond requires environment quiet, has abundant water resources pollution-free, and aspect ratio is 2:1, and water level remains on more than 150cm, and it is convenient to enter draining, and discharge outlet is arranged anti-ly escapes filter screen; Scientific base, Shanghai Aquatic Product Institute Qidong has a good transport service, water quality is good, environment quiet, have abundant water resources pollution-free, there is long 80m, wide 40m, south-north direction cultivating pool, cultivation water level remains on more than 150cm, enters draining conveniently, discharge outlet is arranged prevents escaping filter screen, meets cultivating pool and selects primary condition.

2, to clean up the pond fertilising: need pond desilting sterilization before seed is put in a suitable place to breed, sterilization quicklime, consumption is 90-150kg/1000 ㎡, full pool spilling head after change water; Pond water inlet employing 80 mesh sieve tulle bag filtration, the compound fertilizer (N-P-K=15-15-15) of just splashing in pond after 100cm of adding water carries out rich water and cultivates basic biological feed, consumption is 7.5kg/1000 ㎡, can carry out imposing compound fertilizer according to water body color, make water body keep dark brown, yellow green as well.

3, seed is thrown in: seed reaches more than 8mm and seedling pool inner water body salinity gradually after salinize to the identical salinity in pond, just can be rendered in cultivating pool and cultivate, and seed needs the operation of band water moving in process, and seed breeding density is 4500 tail/1000 ㎡.

4, pond manages: throw in not bait throwing in substantially in initial stage 1-6 days in seed, by the underlying biological bait in pond waters, if when in pond, underlying biological bait is not enough, by soya-bean milk of splashing, freezing large halogen worm, reduce seed to cut one another's throat, to improve the survival rate of hybridization Fugu seed, reach to throw something and feed gradually after 20mm until seed body and be processed into the eel mixed bait of bulk, bait throwing in twice every day, bait feeding volume in the morning accounts for whole day 60%, account for 40% in the afternoon, summer feeding volume to account for fish body weight ratio few compared with spring and autumn, every day, feeding volume adjusted at any time by material feeding situation, to eat up in after bait throwing in 2 hours as in right amount, pond change of water quality and material feeding situation is observed in daily management, in 45 days after seed is put in a suitable place to breed, water is changed once every 15 days, each quantity of exchanged water is 30%, within 46 days, rise until before fishing for, change water frequency and be adjusted to 7 days once, each 50%.

5, disease control: in whole breeding process, splashed every 15 days substrate modifier in cultivating pool commercially available (efficient substrate clear, white+black matrix change king) and EM bacteria microorganism preparation, the parasitic argulus of prevention fish body, when carrying out medical treatment, preferential use EM bacteria microorganism preparation.

6, below pond water temperature drop to 18 DEG C time, just hybridization fish will be transferred to heat preservation greenhouse and survive the winter, fishing style adopts trawl type, and trawlnet adopts knotless net, avoids fish body skin abrasion.

The object of hybrid seedlings Juvenile stage, fugu obscurus (Takifugu obscurus) is as maternal, and the yellow Fugu (Takifugu flavidus) of chrysanthemum is as male parent.The growing state of hybridizing Fugu and its Parent offspring during results 1 age contrasts in table 1.

Table 1 control group 1: adopt the same female parent of hybridization Fugu; Control group 2: adopt the same male parent of hybridization Fugu.

As shown in Table 1, hybridization Fugu has obvious growth vigor, and compared with control group, body is long is 1.17 times of control group 1,1.29 times of control group 2, total length is 1.20 times of control group 1,1.26 times of control group 2, and body weight is 1.67 times of control group 1,1.76 times of control group 2.This shows, the hybridization Fugu kind that this case method obtains incorporates the multinomial merit of Parent parent population, shows obvious heterosis, hybrid vigor, has good market development prospect.

Claims

1. hybridize the pond rearing method of Fugu seed then for one kind, by pond selection, fertilising of cleaning up the pond, seed is thrown in, pond manages, disease control and fish for step and form, it is characterized in that pond is selected in the place had a good transport service, water quality is good, pond require environment quiet, have abundant water resources pollution-free, aspect ratio is 2:1, water level remains on more than 150cm, enters draining conveniently, and discharge outlet is arranged prevents escaping filter screen, need to sterilize to pond desilting before seed is put in a suitable place to breed, sterilization quicklime, consumption is 90-150kg/1000 ㎡, full pool spilling head after change water, pond water inlet employing 80 mesh sieve tulle bag filtration, after the 100cm that adds water, compound fertilizer of splashing in pond carries out rich water and cultivates basic biological feed, consumption is 7.5kg/1000 ㎡, carries out imposing composite fertilizer according to water body color, makes water body be dark brown or yellow green, the seed body length of throwing in need reach more than 8mm, energy is strong, and salinize is to pond culture salinity gradually by seedling pool inner water body salinity to put Miao Qianxu, and seed needs the operation of band water moving in process, and seed breeding density is 4500 tail/1000 ㎡, pond management throws in not bait throwing in substantially in initial stage 1-6 days in seed, by the underlying biological bait in pond waters, if when in pond, underlying biological bait is not enough, by soya-bean milk of splashing, freezing large halogen worm, reduce seed to cut one another's throat, to improve the survival rate of hybridization Fugu seed, reach to throw something and feed gradually after 20mm until seed body and be processed into the eel mixed bait of bulk, bait throwing in twice every day, bait feeding volume in the morning accounts for whole day 60%, account for 40% in the afternoon, summer feeding volume to account for fish body weight ratio few compared with spring and autumn, every day, feeding volume adjusted at any time by material feeding situation, to eat up in after bait throwing in 2 hours as in right amount, pond change of water quality and material feeding situation is observed in daily management, water was changed once every 15 days in 45 days after seed is put in a suitable place to breed, each quantity of exchanged water is 30%, within 46 days, rise until before fishing for, change water frequency and be adjusted to 7 days once, each 50%, disease control is splashed every 15 days substrate modifier in whole breeding process in cultivating pool commercially available (efficient substrate clear, white+black matrix change king) and EM bacteria microorganism preparation, the parasitic argulus of prevention fish body, when carrying out medical treatment, preferential use EM bacteria microorganism preparation, time below pond water temperature drop to 18 DEG C, just hybridization fish will be transferred to heat preservation greenhouse and survive the winter, fishing style adopts trawl type, and trawlnet adopts knotless net, avoids fish body skin abrasion.

2. a kind of pond rearing method of hybridizing Fugu seed then according to claim 1, is characterized in that the object of described hybrid seedlings Juvenile stage, and fugu obscurus is as female parent, and the yellow Fugu of chrysanthemum is as male parent.