CN103636542B - A kind of Bitterling Welfare indoor artificial propagation methods - Google Patents

Abstract

An indoor artificial propagation method of bream, the invention includes intensive cultivation of broodstock, mating of broodstock, seed collection and seed cultivation, and is characterized in that the intensive cultivation of broodstock of bream adopts the adult fish population of bream that has been cultured in ponds for one year as For broodstock groups, select female broodstock individuals with fresh ovary outlines, oviducts extended into a tubular shape, and male fish broodstock individuals with milky white semen flowing out when lightly pressed on the abdomen. The ratio of male to female is 1:1, and put them in the broodstock breeding pond For mussels, after January, the seeds are collected by pulling nets and divided into seed cultivation pools for cultivation. The opening bait for seed cultivation is small freshwater rotifers that pass through the 80-mesh sieve tulle, and gradually supplement the rotifers that pass through the 60-mesh sieve tulle. rotifers and daphnia, the fry grow to a total length of 15mm, and the rotifers and circlipods that have been passed through a 40-mesh tulle screen are fed. The fry grow to a total length of 30mm and can be put into ponds for conventional breeding.

Description

A kind of indoor artificial propagation method of bream

technical field

The invention relates to an artificial propagation technique for fishes of the genus Cyprinus subfamily Cyprinidae, in particular to an indoor artificial propagation technique for Cyprinidae.

Background technique

Rhodeus , belonging to Cyprinidae, Cyprinidae, and Subfamily Cyprinidae, is a small omnivorous wild freshwater fish. It is distributed in all major water systems, especially in the south of the Yangtze River. It has a special breeding Habit (eggs are laid in the gill flaps of mussels). Seaweed, omnivorous, mainly algae, the food is aquatic plants, leaves of higher plants, algae, sedimentary organic matter, zooplankton, aquatic insects and cladocera, etc. It is useful for controlling algal blooms in eutrophic water bodies and improving river channels. , landscape waters, and the bottom quality of aquaculture ponds have positive effects. In addition, the fish has a marriage color. During the breeding season, the male fish is extremely bright in color, with an orange-red abdomen, light red fins, and pearl stars on the snout and around the eye sockets. It is very popular among Chinese native fish viewing enthusiasts and has ornamental value. At the same time, squid can also be used as a traditional Chinese medicine, which has the effects of adding essence and marrow, nourishing the fire of the triple burner, benefiting the spleen and stomach, and eliminating acne poison. In scientific research and aquaculture production, because the squid is a small fish, it can be used as a bait fish for some large carnivorous fish; because of its short reproductive cycle, it can also be developed as an animal experiment fish.

In recent years, factors such as water pollution, overfishing, illegal electricity, explosives, poisonous fish and other factors have seriously affected the natural resources of the squid, and the fecundity of the squid is relatively weak, and its special breeding habits (eggs are laid on the gill flaps of mussels) Middle) has become a bottleneck in the research of artificial reproduction technology, hindering the development of its subsequent scientific research, ecological and economic value. At present, there is no in-depth research on the artificial propagation technology in China. Therefore, the artificial propagation technology of S. chinensis has become the key to protect the germplasm resources of S. spp.

Contents of the invention

The purpose of the present invention is to provide a kind of indoor intensive artificial breeding technology of bream.

The technical scheme of the present invention includes the steps of intensive cultivation, mating, seed collection, and seed cultivation of the broodstock of the bream; it is characterized in that the intensive cultivation of the broodstock of the bream adopts the adult fish population of the bream that has been cultivated in a pond for one year as the broodstock group, Select female broodstock individuals with fresh ovary outlines, oviducts extended into tubes, and male fish broodstock individuals with milky white semen flowing out when lightly pressed on the abdomen. The ratio of male to female is 1:1. The selected broodstock is required to be strong and vigorous, The scales and fin rays are intact and smooth without scars; the broodstock breeding pond is an indoor cement pond of 20-25 m ² , the stocking density is 20-25 tails/m ² , the blower is used to continuously inflate oxygen, and the density of air stones is 0.5-1/ m ² , fed 0 ^# shrimp pellets, fed twice a day, sucked up dirt every day, and changed water once a week; broodstock were cultivated until early April, and the water temperature in the shed had risen to above 15°C, and they were put in the broodstock cultivation pond The stocking density of mussels is 5-10/m ² ; male and female broodstock mate naturally. When oviducts lay eggs, they first look for mussels, insert them into the gill water pipes of mussels with the help of slender oviducts, and lay eggs in the gills or mantle cavity Among them, after the female fish laid eggs, the male fish immediately fertilized them, and the fertilized eggs hatched and developed in the mussels; after the river mussels were released for one month, as soon as juvenile fish clusters were observed in the broodstock breeding pond, 80-mesh sieves were used to screen them. Pull the net to collect. During the operation of pulling the net, the lower line rope is 15-20 cm away from the bottom of the pond. The young fish collected are moved into the nursery pond with water and seedlings, and the broodstock returns to the original pond; the nursery pond is an indoor cement pond of 20-25 ^m2 . The stocking density is 1000-2000 tails/pond, and the blower is used to continuously inflate and oxygenate. The density of air stones is 0.5-1/m ² . The static water aeration method is used for cultivation, and the water temperature is 20-28°C. The water for seedling cultivation is fresh water, which has undergone secondary precipitation Finally, filter it with a 200-mesh sieve and inject it into the nursery pond; the opening bait for seedling cultivation is a small freshwater rotifer that has passed through an 80-mesh sieve, and the rotifer density is 1-2/ml. After 7 days, add rotifers and daphnia that passed through a 60-mesh sieve to increase their palatability; absorb the dirt once a day to clear the bottom, change the water once a day, and the water change rate is 60%; The larvae of worms and circlipods, the zooplankton are fished and filtered with 40-mesh sieves, and then fed, once in the morning and afternoon, once a day to absorb the dirt and clean the bottom, and change the water every other day, the water change is 60-70%, The cultivated fish fry grow to a total length of more than 30 mm, and can be put into ponds for conventional culture.

The salient features of the present invention are: 1) Solve the indoor artificial breeding technology of scallops, compared with the natural breeding mode of scallops relying on river mussels to complete the development of yolk sac larvae before the stage, forming a seed cultivation with stronger artificial controllability Technology; 2) Compared with natural breeding, the survival rate of indoor seedling cultivation is significantly improved, and is less affected by natural environmental factors; 3) Several key technical points such as bait types, stocking density, and separation methods of broodstock juveniles in artificial breeding and seedling breeding have been solved , forming an operating procedure, which is easy to operate, easy to accept and popularize.

detailed description

The production technical steps of the invention include: intensified cultivation of the broodstock of the anchovy, mating of the broodstock, isolation of embryos, artificial hatching and seedling cultivation.

1. Intensive cultivation of broodstock:

The adult fish populations of scallops that have been cultured in ponds for one year are used as the broodstock population, and the female broodstock individuals with fresh ovarian outlines and oviducts extending into tubes can be seen, and the male fish broodstock individuals with milky white semen flowing out when lightly pressed on the abdomen are selected. The ratio of male to female is 1:1, and the selected broodstock is required to be strong and vigorous, and the scales and fin rays are intact and smooth without scars. The breeding pond is an indoor cement pond of 20-25 m ² , the stocking density is 20-25 tails/m ² , the blower is continuously inflated to increase oxygen, the air stone density is 0.5-1/m ² , and 0 ^# shrimp pellet feed is fed, every day Feed twice, absorb dirt every day, and change water once a week.

2. Parent fish mating:

The broodstock was cultivated until the beginning of April, and the water temperature in the shed had risen to above 15°C. The mussels were put into the breeding pond at a density of 5-10 per m ² , and the male and female broodstock mated naturally. Mussels are inserted into the gills of mussels with the help of slender oviducts, and eggs are laid in the gills or mantle cavity. After the female fish lays eggs, the male fish immediately fertilizes them, and the fertilized eggs hatch and develop in the mussels.

3. Seed collection:

One month after the river mussels were released, once juvenile fish clusters were observed in the broodstock breeding pond, they were collected with an 80-mesh sieve tulle net. When pulling the net, the lower line rope was 15-20 cm away from the bottom of the pond. The collected juvenile fish were collected in a basin. Even the water and the seedlings are moved into the nursery pond, and the broodstock returns to the original pond.

4. Seedling cultivation:

The nursery pond is an indoor cement pond of 20-25 m ² , the stocking density is 1000-2000 tails/pond, the blower is used to inflate and oxygenate continuously, the air stone density is 0.5-1/m ² , and the method of static water aeration is used for cultivation, and the water temperature is natural The water temperature range is 20-28°C; the seedling water is fresh water, after secondary precipitation, it is filtered with a 200-mesh silk screen and then poured into the nursery pool; the opening bait for seedling cultivation is a small freshwater rotifer that has passed through an 80-mesh screen silk screen. The density of worms is 1-2/ml, once in the morning and in the afternoon, and after 7 days of cultivation, add rotifers and daphnia that pass through a 60-mesh sieve to increase their palatability; suck the dirt and clean the bottom once a day, and change the water once a day , the water change rate is 60%; the fish fry grow to a total length of 15mm, and the larvae of rotifers and circumlopods are fed. After the zooplankton is caught, they are filtered with 40-mesh sieves and then fed. Once at the end, change the water once every other day, the water change volume is 60-70%, and the cultivated fish fry grow to a total length of more than 30mm, and can be put into the pond for conventional breeding.

Claims (1)

1. A method for indoor artificial propagation of bream broodstock, comprising steps of intensive cultivation of bream broodstock, mating of broodstock, seed collection and seed cultivation; it is characterized in that the intensive cultivation of bream broodstock adopts bream broodstock grown in ponds for one year As a broodstock group, select female broodstock individuals with fresh ovary outlines, oviducts extended into tubes, and male fish broodstock individuals with milky white semen flowing out when lightly pressed on the abdomen. The ratio of male to female is 1:1, and the selection is required The broodstock is strong and vigorous, with complete scales and fin rays and smooth body surface without scars; the broodstock breeding pond is an indoor cement pond of 20-25 m ² , the stocking density is 20-25 fish/m ² , and the blower is used to continuously inflate oxygen to increase the density of air stones. 0.5-1/m ² , fed 0 ^# shrimp pellets, fed twice a day, sucked up dirt every day, and changed the water once a week; the broodstock was cultivated until the beginning of April, and the water temperature in the shed had risen to above 15°C. Put mussels in broodstock breeding ponds at a density of 5-10/m ² ; male and female broodstock mate naturally, and when oviducts lay eggs, first look for mussels, insert them into the gills of mussels with the help of slender oviducts, and lay eggs In the gills or in the mantle cavity, after the female fish lays eggs, the male fish immediately fertilizes them, and the fertilized eggs hatch and develop in the mussels; after one month after the mussels are released, once the juvenile fish clusters are observed in the broodstock breeding pond, Use 80-mesh sieve tulle to pull the net to collect. During the operation of pulling the net, the lower line rope is 15-20 cm away from the bottom of the pond. The young fish collected are moved into the nursery pond with the water and the seedlings, and the broodstock returns to the original pond; the nursery pond is 20-25 cm. m ² indoor cement ponds, stocking density 1000-2000 tails/pond, continuous aeration and oxygenation with blower, airstone density 0.5-1/m ² , adopt static water aeration method for cultivation, water temperature 20-28℃; seedling water is Fresh water, after secondary sedimentation, is filtered with 200-mesh silk screen and injected into the seedling pond; the bait for seedling cultivation is small freshwater rotifers passing through 80-mesh screen silk screen, and the density of rotifers is 1-2/ml. Invest once in the afternoon, and after 7 days of cultivation, add rotifers and daphnia that passed through a 60-mesh sieve to increase their palatability; once a day to absorb dirt and clear the bottom, change the water once a day, and the water change rate is 60%; the fry grow to full size. The length is 15mm. Feed the larvae of rotifers and circumlopods. After the zooplankton are fished out, they are filtered with 40-mesh sieves and then fed. They are fed once in the morning and in the afternoon. It is 60-70%, and the cultivated fish fry grow to a total length of more than 30mm, and can be put into ponds for conventional breeding.