CN103891640A - Method for hatching and breeding aquatic seedlings - Google Patents

Abstract

The invention discloses a method for hatching and breeding aquatic seedlings. The method includes the steps of seedling breeding, parent fish rearing and optimizing, parent fish rearing and original source introduction, standard pond cultivation, reversible environment screening, artificial propagation, postnatal nurturing, secondary pond screening and eliminating, seedling cultivation, bait scientific preparation for guaranteeing reasonable nutrition, prevention of diseases and the like. According to the method, cement ponds are used for hatching, fertilized ova processed through conditioning fluid are used, uniformly distributed on hatching fish nests manually and then hatched, and effective breeding of seeding hatching is guaranteed.

Description

A kind of aquatic product sprout is hatched the method for breeding

Technical field

The invention belongs to novel ecological cultural technique field, relate to a kind of large-scale fish pond consumption reduction synergy culture model, say that more specifically a kind of aquatic product sprout hatches the method for breeding.

Background technology

Along with the adjustment of agricultural structure, aquaculture is as one of agricultural leading industries, for increasing advantage and potentiality have been given play in economic growth.It is one of aquaculture key link that seed produces, and it is also the basis of culture fishery development simultaneously, is the principal element that affects aquatic products industry development.Aquatic product sprout is the material base of culture fishery development, is the key link that aquaculture is produced.Do the supervision and management of aquatic product sprout production well, make it to adapt to the needs of culture fishery fast development, for the industrial structure of adjusting and optimize fishery, promote fishery industry overall efficiency, ensure that fishery is lasting, stable, high speed development has very important meaning.Aquatic product sprout is a kind of special commodity, has the characteristic of himself compared with other commodity.1) life: it is being born and is producing offspring and the dual role used of aquaculture seedling, and this is that other commodity can not replace.Aquatic product sprout is the material of living, and vitality is stronger, seedling quality better.2) ageing: first, aquatic animal has breeding period separately, by artificially only changing within the specific limits its repoductive time.Secondly, aquaculture production is subject to seasonal restrictions, and best period is emerged, transported to aquatic product sprout, missed best period, and aquatic product sprout not only cultivates survival rate to be reduced, and has also lost the seedling of cultivation with being worth, and does not reach the object of breeding production.Therefore, aquatic product sprout is bred strong ageing.3) technical: the breeding of aquatic product sprout, the maintenance of germplasm, production, operation are complicated biotechnology, and its technical requirement is high, and the each variety production technology of aquatic product sprout varies, and every kind of aquatic animal has again its reproductive characteristic separately.Therefore, the supervision and management that aquatic product sprout is produced, managed, must be by understanding that the technical staff that seed produces serves as, and aquatic product sprout supervision and management just can be avoided blindness like this.

Summary of the invention

Along with aquatic product sprout industry high speed development, aquatic product sprout production supervision management work is more and more subject to the great attention of administrative department for fisheries at different levels.Take various forms, strengthen aquatic product sprout administrative staff professional training, improve the quality, reach and build a high-quality aquatic product sprout management team object.The one, by manually operated environmental condition, by preferably, keep and improve the anti-adversity ability of parent and seed, keep good proterties.The 2nd, constantly introduce new original seed or original seed seed, cultivate parent, form edge mating far away with existing parent, avoid inbreeding and the degeneration that produces.The 3rd, seed is eliminated preferably, do not make the residual seed of deformity, disease and harmful medicine appear on the scene.The 4th, utilize on this basis modern hybridization, cell engineering, develop new Hybrid and female, complete male kind entirely, to adapt to the needs of the unit of cultivation.

The invention discloses with kind of aquatic product sprout and hatch the method for breeding, it is characterized in that being undertaken by following step:

(1) 10-15 days before seed breeding, cultivation, with 50 centimetres of 80 object gauze filtered water inlets, can turn out good water colour and transparency through 3-4 days, formed good ecotope; Under fingerling, when the pool, pond Shuifu County is containing food organisms, and beneficial bacterium and algae become dominant population; Desirable water quality transparency should be at 25-30cm, and water colour is dark brown or yellow green; Organic fertilizer not after the preparation of ponds, if after pond adds water, water quality is too thin, can executes a small amount of organic ripe extensive use of chemical fertilizer juice and splash for every mu; Exchanging water principle is:

1. cultivate water level spring and will control lowlyer, should, according to the temperature rises and fish bulk-growth and progressively adding water, increase 10cm, until cultivation water level controls to 1.5 ~ 2.0 meters at every turn;

2. control after water level when reaching maximum, regulating and controlling water quality can be used water transfer method, in the time that water colour is bad, strengthens the water yield and the flow that inject wild rice stem growing area; Now, the good flow of water quality is little, and water quality inferiority flow is large; Daytime, flow was little, and flow is large after midnight; Have wind sky flow little, within calm day, flow is large;

3. regularly use microorganism examination to improve water quality; For the content of ammonium nitrogen and nitrite in degraded pond, improve fish immunity ability, particularly, in the pond of new water that is difficult to annotate, use microorganism reagent that must be regular is photosynthetic bacteria, EM bacterium, ensures water quality " fertile, alive, tender, refreshing "; Within the cultivation phase, the pH value of breeding water body is controlled at 7.2-8.5; Dissolved oxygen >=4mg/L; In the time that dissolved oxygen is not up to standard, open oxygen increasing equipment in good time;

(2) parent fish rearing and preferred: a point pond is eliminated in cultivate parent fish rearing and former edge introduction → standard pond rearing → reversible environmental screening → artificial propagation → postpartum → screening, select parent population physique stalwartness, anosis, without wound, general selection above parent population in 1 age, parent population has experienced 4 screenings before use, generally in the time that juvenile fish reaches 250g-300g, select that tail line is bright-coloured, tail band is neat, body is longer, there is no deformity, male and female parent population ratio, with 2:1, is carried out seed production through multistage screening by selfing, Crossing system, in the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition, propagation method can be taked natural spawning or artificial induced spawning and insemination, natural spawning gets the mature brood fish of choosing, press female-male proportion 1: 6 or 2: 10 combos, put into spawning pond, spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1-2 mu, 1 meter of the depth of water, artificial fish nest is set in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 5-10 minute through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing, eliminate, ensure the good pure of breeding proterties,

(3) seed rearing: more than the dissolved oxygen in larval rearing water remains on 5mg/L, add algae liquid regulation and control transparency 50cm; Put seedling density 30000-50000 tail/cubic meter; The water temperature temperature difference of nursery pond and Spawning water is no more than 1 DEG C, salinity is poor is no more than 3 ‰, fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, and every mu of the breeding density of fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch; Raised through 120-150 days again, can grow to the large size fingerling of 13 centimetres, also can support or raise together with through overlapping by summer flower, directly form marketable fish;

(4) preparation of bait science ensures that nutrition is reasonable, the composition of bait preparing: dregs of beans 25-30 part, wheat bran 25-40 part, corn 8-20 part, alfalfa meal 5-10 part, additive (terramycin) 0.5-2 part, margosa leaf 1-3 part;

(5) carry out prevention of damage by disease

1) seed produces: by selfing: two same quality high-quality parent populations of the same race, by artificial induced spawning the cultivated seed that is fertilized), Crossing system carries out seed production.

2) breeding

In the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition.Propagation method can be taked natural spawning or artificial induced spawning and insemination, and natural spawning gets the mature brood fish of choosing, and by female-male proportion 1: 6 or 2: 10 combos, puts into spawning pond.Spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1-2 mu, and 1 meter of left and right of the depth of water, arranges artificial fish nest in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 5-10 minute through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing

3) seed rearing

Fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, the principal element that directly affects its growth and survive be agreeable to the taste bait number, every mu of the breeding density of general fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch left and right, raised through 120-150 days again, can grow to 13 centimetres of above large size fingerlings, also can support or raise together with through overlapping by summer flower, directly form marketable fish.

The good effect that aquatic product sprout hatching mating system disclosed by the invention compared with prior art had is:

Aquatic products of the present invention is hatched the key technical indexes of the seed breeding:

(1) temperature control: by heating, insulation means, steady production water temperature, controls hatching water temperature and change round the clock within the scope of 2 DEG C.

 

(2) artificial propagation: use in own patented technology and activate seminal fluid, improve fertilization rate, extend the processing medicine of viscid egg viscosity generation time, improve fertilization rate.

(3) hatching: carry out cement pit hatching, use the fertilized egg for the treatment of fluid processing, hatch after artificial coating is evenly distributed in Hatching fish net.

Embodiment:

Below in conjunction with embodiment, the present invention is described, the scheme of embodiment described here, do not limit the present invention, one of skill in the art can make improvements and change according to spirit of the present invention, these described improvement and variation all should be considered as within the scope of the invention, and scope of the present invention and essence are limited by claim.Dregs of beans, wheat bran, corn, alfalfa meal, additive (terramycin), margosa is set raw material used all has commercially available.

Embodiment 1:

Plant aquatic product sprout and hatch the method for breeding, it is characterized in that being undertaken by following step:

(1) seed breeding, cultivate first 10 days, with 50 centimetres of 80 object gauze filtered water inlets, can turn out good water colour and transparency through 3 days, form good ecotope; Under fingerling, when the pool, pond Shuifu County is containing food organisms, and beneficial bacterium and algae become dominant population; Desirable water quality transparency should be at 25-30cm, and water colour is dark brown or yellow green; Organic fertilizer not after the preparation of ponds, if after pond adds water, water quality is too thin, can executes a small amount of organic ripe extensive use of chemical fertilizer juice and splash for every mu; Exchanging water principle is:

1. cultivate water level spring and will control lowlyer, should, according to the temperature rises and fish bulk-growth and progressively adding water, increase 10cm, until cultivation water level controls to 1.5 meters at every turn;

2. control after water level when reaching maximum, regulating and controlling water quality can be used water transfer method, in the time that water colour is bad, strengthens the water yield and the flow that inject wild rice stem growing area; Now, the good flow of water quality is little, and water quality inferiority flow is large; Daytime, flow was little, and flow is large after midnight; Have wind sky flow little, within calm day, flow is large;

3. regularly use microorganism examination to improve water quality; For the content of ammonium nitrogen and nitrite in degraded pond, improve fish immunity ability, particularly, in the pond of new water that is difficult to annotate, use microorganism reagent that must be regular is photosynthetic bacteria, EM bacterium, ensures water quality " fertile, alive, tender, refreshing "; Within the cultivation phase, the pH value of breeding water body is controlled at 7.2; Dissolved oxygen >=4mg/L; In the time that dissolved oxygen is not up to standard, open oxygen increasing equipment in good time;

(2) parent fish rearing and preferred: a point pond is eliminated in cultivate parent fish rearing and former edge introduction → standard pond rearing → reversible environmental screening → artificial propagation → postpartum → screening, select parent population physique stalwartness, anosis, without wound, general selection above parent population in 1 age, parent population has experienced 4 screenings before use, generally in the time that juvenile fish reaches 250g, select that tail line is bright-coloured, tail band is neat, body is longer, there is no deformity, male and female parent population ratio, with 2:1, is carried out seed production through multistage screening by selfing, Crossing system, in the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition, propagation method can be taked natural spawning or artificial induced spawning and insemination, natural spawning gets the mature brood fish of choosing, press female-male proportion 1: 6 or 2: 10 combos, put into spawning pond, spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1 mu, 1 meter of the depth of water, artificial fish nest is set in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 5 minutes through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing, eliminate, ensure the good pure of breeding proterties,

(3) seed rearing: more than the dissolved oxygen in larval rearing water remains on 5mg/L, add algae liquid regulation and control transparency 50cm; Put seedling density 30000 tail/cubic meters; The water temperature temperature difference of nursery pond and Spawning water is no more than 1 DEG C, salinity is poor is no more than 3 ‰, fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, and every mu of the breeding density of fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch; Raised through 120-150 days again, can grow to the large size fingerling of 13 centimetres, also can support or raise together with through overlapping by summer flower, directly form marketable fish;

(4) bait science preparation ensures that nutrition is reasonable, the composition of bait preparing: 1 part of 25 parts of dregs of beans, 25 parts, wheat bran, 8 parts of corns, 5 parts of alfalfa meals, additive 0.5 part (terramycin), margosa leaf;

(5) carry out prevention of damage by disease

1) seed produces: by selfing: two same quality high-quality parent populations of the same race, by artificial induced spawning the cultivated seed that is fertilized), Crossing system carries out seed production.

2) breeding

In the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition.Propagation method can be taked natural spawning or artificial induced spawning and insemination, and natural spawning gets the mature brood fish of choosing, and by female-male proportion 1: 6 or 2: 10 combos, puts into spawning pond.Spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1 mu, and 1 meter of left and right of the depth of water, arranges artificial fish nest in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 5 minutes through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing

3) seed rearing

Fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, the principal element that directly affects its growth and survive be agreeable to the taste bait number, every mu of the breeding density of general fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch left and right, raised through 120 days again, can grow to 13 centimetres of above large size fingerlings, also can support or raise together with through overlapping by summer flower, directly form marketable fish.

Embodiment 2

(1) seed breeding, cultivate first 15 days, with 50 centimetres of 80 object gauze filtered water inlets, can turn out good water colour and transparency through 4 days, form good ecotope; Under fingerling, when the pool, pond Shuifu County is containing food organisms, and beneficial bacterium and algae become dominant population; Desirable water quality transparency should be at 30cm, and water colour is dark brown or yellow green; Organic fertilizer not after the preparation of ponds, if after pond adds water, water quality is too thin, can executes a small amount of organic ripe extensive use of chemical fertilizer juice and splash for every mu; Exchanging water principle is:

1. cultivate water level spring and will control lowlyer, should, according to the temperature rises and fish bulk-growth and progressively adding water, increase 10cm, until cultivation water level controls to 2.0 meters at every turn;

2. control after water level when reaching maximum, regulating and controlling water quality can be used water transfer method, in the time that water colour is bad, strengthens the water yield and the flow that inject wild rice stem growing area; Now, the good flow of water quality is little, and water quality inferiority flow is large; Daytime, flow was little, and flow is large after midnight; Have wind sky flow little, within calm day, flow is large;

3. regularly use microorganism examination to improve water quality; For the content of ammonium nitrogen and nitrite in degraded pond, improve fish immunity ability, particularly, in the pond of new water that is difficult to annotate, use microorganism reagent that must be regular is photosynthetic bacteria, EM bacterium, ensures water quality " fertile, alive, tender, refreshing "; Within the cultivation phase, the pH value of breeding water body is controlled at 8.5; Dissolved oxygen >=4mg/L; In the time that dissolved oxygen is not up to standard, open oxygen increasing equipment in good time;

(2) parent fish rearing and preferred: a point pond is eliminated in cultivate parent fish rearing and former edge introduction → standard pond rearing → reversible environmental screening → artificial propagation → postpartum → screening, select parent population physique stalwartness, anosis, without wound, general selection above parent population in 1 age, parent population has experienced 4 screenings before use, generally in the time that juvenile fish reaches 300g, select that tail line is bright-coloured, tail band is neat, body is longer, there is no deformity, male and female parent population ratio, with 2:1, is carried out seed production through multistage screening by selfing, Crossing system, in the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition, propagation method can be taked natural spawning or artificial induced spawning and insemination, natural spawning gets the mature brood fish of choosing, press female-male proportion 1: 6 or 2: 10 combos, put into spawning pond, spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1-2 mu, 1 meter of the depth of water, artificial fish nest is set in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 10 minutes through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing, eliminate, ensure the good pure of breeding proterties,

(3) seed rearing: more than the dissolved oxygen in larval rearing water remains on 5mg/L, add algae liquid regulation and control transparency 50cm; Put seedling density 30000-50000 tail/cubic meter; The water temperature temperature difference of nursery pond and Spawning water is no more than 1 DEG C, salinity is poor is no more than 3 ‰, fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, and every mu of the breeding density of fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch; Raised through 120-150 days again, can grow to the large size fingerling of 13 centimetres, also can support or raise together with through overlapping by summer flower, directly form marketable fish;

(4) preparation of bait science ensures that nutrition is reasonable, the composition of bait preparing: 30 parts of dregs of beans, 40 parts, wheat bran, 8 parts of corns, 10 parts of alfalfa meals, 0.5 part of additive (terramycin), 3 parts of margosa leaves;

(5) carry out prevention of damage by disease

1) seed produces: by selfing: two same quality high-quality parent populations of the same race, by artificial induced spawning the cultivated seed that is fertilized), Crossing system carries out seed production.

2) breeding

In the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition.Propagation method can be taked natural spawning or artificial induced spawning and insemination, and natural spawning gets the mature brood fish of choosing, and by female-male proportion 1: 6 or 2: 10 combos, puts into spawning pond.Spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 2 mu, and 1 meter of left and right of the depth of water, arranges artificial fish nest in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 10 minutes through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing

3) seed rearing

Fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, the principal element that directly affects its growth and survive be agreeable to the taste bait number, every mu of the breeding density of general fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch left and right, raised through 150 days again, can grow to 13 centimetres of above large size fingerlings, also can support or raise together with through overlapping by summer flower, directly form marketable fish.

Embodiment 3

Aquatic product sprout is hatched the method for breeding, and it is characterized in that being undertaken by following step:

(1) seed breeding, cultivate first 8 days, with 50 centimetres of 80 object gauze filtered water inlets, can turn out good water colour and transparency through 84 days, form good ecotope; Under fingerling, when the pool, pond Shuifu County is containing food organisms, and beneficial bacterium and algae become dominant population; Desirable water quality transparency should be at 830cm, and water colour is dark brown or yellow green; Organic fertilizer not after the preparation of ponds, if after pond adds water, water quality is too thin, can executes a small amount of organic ripe extensive use of chemical fertilizer juice and splash for every mu; Exchanging water principle is:

1. cultivate water level spring and will control lowlyer, should, according to the temperature rises and fish bulk-growth and progressively adding water, increase 10cm, until cultivation water level controls to 82.0 meters at every turn;

2. control after water level when reaching maximum, regulating and controlling water quality can be used water transfer method, in the time that water colour is bad, strengthens the water yield and the flow that inject wild rice stem growing area; Now, the good flow of water quality is little, and water quality inferiority flow is large; Daytime, flow was little, and flow is large after midnight; Have wind sky flow little, within calm day, flow is large;

3. regularly use microorganism examination to improve water quality; For the content of ammonium nitrogen and nitrite in degraded pond, improve fish immunity ability, particularly, in the pond of new water that is difficult to annotate, use microorganism reagent that must be regular is photosynthetic bacteria, EM bacterium, ensures water quality " fertile, alive, tender, refreshing "; Within the cultivation phase, the pH value of breeding water body is controlled at 7.5; Dissolved oxygen >=4mg/L; In the time that dissolved oxygen is not up to standard, open oxygen increasing equipment in good time;

(2) parent fish rearing and preferred: cultivate in parent fish rearing and the introduction of former edge, standard pond rearing, reversible environmental screening → artificial propagation, postpartum, screen and eliminate a point pond, select parent population physique stalwartness, anosis, without wound, general selection above parent population in 1 age, parent population has experienced 4 screenings before use, generally in the time that juvenile fish reaches 300g, select that tail line is bright-coloured, tail band is neat, body is longer, there is no deformity, male and female parent population ratio, with 2:1, is carried out seed production through multistage screening by selfing, Crossing system, in the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition, propagation method can be taked natural spawning or artificial induced spawning and insemination, natural spawning gets the mature brood fish of choosing, press female-male proportion 1: 6 or 2: 10 combos, put into spawning pond, spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1-2 mu, 1 meter of the depth of water, artificial fish nest is set in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 10 minutes through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing, eliminate, ensure the good pure of breeding proterties,

(3) seed rearing: more than the dissolved oxygen in larval rearing water remains on 5mg/L, add algae liquid regulation and control transparency 50cm; Put seedling density 40000 tail/cubic meters; The water temperature temperature difference of nursery pond and Spawning water is no more than 1 DEG C, salinity is poor is no more than 3 ‰, fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, and every mu of the breeding density of fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch; Raised through 150 days again, can grow to the large size fingerling of 13 centimetres, also can support or raise together with through overlapping by summer flower, directly form marketable fish;

(4) bait science preparation ensures that nutrition is reasonable, the composition of bait preparing: 3 parts of 28 parts of dregs of beans, 35 parts, wheat bran, 18 parts of corns, 8 parts of alfalfa meals, 1.5 parts of terramycin of additive, margosa leaf;

(5) carry out prevention of damage by disease

1) seed produces: by selfing: two same quality high-quality parent populations of the same race, by artificial induced spawning the cultivated seed that is fertilized), Crossing system carries out seed production.

2) breeding

In the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition.Propagation method can be taked natural spawning or artificial induced spawning and insemination, and natural spawning gets the mature brood fish of choosing, and by female-male proportion 1: 6 or 2: 10 combos, puts into spawning pond.Spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 2 mu, and 1 meter of left and right of the depth of water, arranges artificial fish nest in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 10 minutes through 5% saline solution, move into hatching in the breeding spand of sterilizing

3) seed rearing

Fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, the principal element that directly affects its growth and survive be agreeable to the taste bait number, every mu of the breeding density of general fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch left and right, raised through 150 days again, can grow to 13 centimetres of above large size fingerlings, also can support or raise together with through overlapping by summer flower, directly form marketable fish.

Claims (1)

1. aquatic product sprout is hatched a method of breeding, and it is characterized in that being undertaken by following step:

(1) 10-15 days before seed breeding, cultivation, with 50 centimetres of 80 object gauze filtered water inlets, can turn out good water colour and transparency through 3-4 days, formed good ecotope; Under fingerling, when the pool, pond Shuifu County is containing food organisms, and beneficial bacterium and algae become dominant population; Desirable water quality transparency should be at 25-30cm, and water colour is dark brown or yellow green; Organic fertilizer not after the preparation of ponds, if after pond adds water, water quality is too thin, can executes a small amount of organic ripe extensive use of chemical fertilizer juice and splash for every mu; Exchanging water principle is:

1. cultivate water level spring and will control lowlyer, should, according to the temperature rises and fish bulk-growth and progressively adding water, increase 10cm, until cultivation water level controls to 1.5 ~ 2.0 meters at every turn;

2. control after water level when reaching maximum, regulating and controlling water quality can be used water transfer method, in the time that water colour is bad, strengthens the water yield and the flow that inject wild rice stem growing area; Now, the good flow of water quality is little, and water quality inferiority flow is large; Daytime, flow was little, and flow is large after midnight; Have wind sky flow little, within calm day, flow is large;

3. regularly use microorganism examination to improve water quality; For the content of ammonium nitrogen and nitrite in degraded pond, improve fish immunity ability, particularly, in the pond of new water that is difficult to annotate, use microorganism reagent that must be regular is photosynthetic bacteria, EM bacterium, ensures water quality " fertile, alive, tender, refreshing "; Within the cultivation phase, the pH value of breeding water body is controlled at 7.2-8.5; Dissolved oxygen >=4mg/L; In the time that dissolved oxygen is not up to standard, open oxygen increasing equipment in good time;

(2) parent fish rearing and preferred: a point pond is eliminated in cultivate parent fish rearing and former edge introduction → standard pond rearing → reversible environmental screening → artificial propagation → postpartum → screening, select parent population physique stalwartness, anosis, without wound, general selection above parent population in 1 age, parent population has experienced 4 screenings before use, generally in the time that juvenile fish reaches 250g-300g, select that tail line is bright-coloured, tail band is neat, body is longer, there is no deformity, male and female parent population ratio, with 2:1, is carried out seed production through multistage screening by selfing, Crossing system, in the time that spring, water temperature stability was at 18 DEG C, breeding starts to hasten parturition, propagation method can be taked natural spawning or artificial induced spawning and insemination, natural spawning gets the mature brood fish of choosing, press female-male proportion 1: 6 or 2: 10 combos, put into spawning pond, spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1-2 mu, 1 meter of the depth of water, artificial fish nest is set in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 5-10 minute through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing, eliminate, ensure the good pure of breeding proterties,

(3) seed rearing: more than the dissolved oxygen in larval rearing water remains on 5mg/L, add algae liquid regulation and control transparency 50cm; Put seedling density 30000-50000 tail/cubic meter; The water temperature temperature difference of nursery pond and Spawning water is no more than 1 DEG C, salinity is poor is no more than 3 ‰, fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, and every mu of the breeding density of fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch; Raised through 120-150 days again, can grow to the large size fingerling of 13 centimetres, also can support or raise together with through overlapping by summer flower, directly form marketable fish;

(4) preparation of bait science ensures that nutrition is reasonable, the composition of bait preparing: dregs of beans 25-30 part, wheat bran 25-40 part, corn 8-20 part, alfalfa meal 5-10 part, additive 0.5-2 part terramycin, margosa leaf 1-3 part;

(5) carry out prevention of damage by disease

1) seed produces: by selfing: two same quality high-quality parent populations of the same race, by artificial induced spawning the cultivated seed that is fertilized), Crossing system carries out seed production,

2) breeding

In the time that spring, water temperature stability was at 18 DEG C, the breeding that starts to hasten parturition,

Propagation method can be taked natural spawning or artificial induced spawning and insemination, and natural spawning gets the mature brood fish of choosing, and by female-male proportion 1: 6 or 2: 10 combos, puts into spawning pond,

Spawning pond must be sterilized in advance, remove wild fishes, area is advisable with 1-2 mu, and 1 meter of left and right of the depth of water, arranges artificial fish nest in pond, after sterilization, hang in the water of 0.5 meter of underwater, after finishing wait laying eggs, fish nest is taken out, embathe after 5-10 minute through the saline solution of 3-5%, move into hatching in the breeding spand of sterilizing

3) seed rearing

Fry opens the zooplankton that mainly eats wheel animalcule and protozoa and so on after food, along with fish length is large, feeding habits transform to macroplankton thereupon, the same with other fries, the principal element that directly affects its growth and survive be agreeable to the taste bait number, every mu of the breeding density of general fry is no more than 300,000 tails, through the cultivation of 30 days, can grow to the summer flower fingerling of one-inch left and right, raised through 120-150 days again, can grow to 13 centimetres of above large size fingerlings, also can support or raise together with through overlapping by summer flower, directly form marketable fish.