Method for nature spawning and fertilization of scatophagus argus by artificial induction

Abstract

The invention discloses a method for nature spawning and fertilization of scatophagus argus by artificial induction. According to the method, for parent fish, the gonad development and the maturation can be promoted by nutrition optimization, adjustment of the breeding condition and the combination with exogenous hormone in a net cage in a natural sea area, and the natural spawning and fertilization can be realized by artificial induction at artificial culture areas such as a spawning net cage or a cement breeding pool of a culture sea area. The effective rate of maturation acceleration of the parent fish is 89.1-100%, the spawning rate is 79.2-94.0%, the maturing rate of the milter is 100% and the total spawning amount of the parent fish is 48 million. The method disclosed by the invention has the advantages that the simpleness and convenience are achieved, convenience is brought for operation control, the technical cost is low, the effect is obvious and stable, the mature time and the spawning time of the parent fish can be more accurately judged according to the gonad development state and the ecological condition of the sea area, and the fertilized egg and the biological study materials are provided for breeding and production of the scatophagus argus fries.

Description

Technical field:

[0001] The invention belongs to the field of aquaculture, and in particular relates to a method for artificially inducing natural spawning and fertilization of money fish. Background technique:

[0002] Goldfish belongs to Perciformes, Scatophagidae, and Scatophagus. It is a tropical-subtropical wide-temperature and wide-salt species. It is distributed in the Indo-Pacific waters, from Kuwait to Vanuatu, and southern Japan. It is distributed in vast waters such as Shrike and Micronesian Islands. The money fish is the only species of fish in this family that has been recorded in my country at present. It is mainly distributed in the South China Sea, the Taiwan Strait and the East China Sea.

[0003] Money fish is a rare seawater economic fish with high ornamental value and food value. Fast growth, strong resistance to disease and stress, not only can grow and develop normally in seawater and brackish water, but also can be cultured and produced in fresh wate...

Examples

Embodiment 1

[0019] (1) The broodstock is artificially cultivated from wild seedlings, and the juvenile fish are mainly fed with compound feed. Two months before the breeding period of the golden fish, select healthy broodstock, and carry out nutritional intensive cultivation under the shade of floating raft cages in the coastal harbor sea area, and the seawater flow rate in the breeding sea area is 5~20cm.s -1 In between, feed the Yuehai brand A series seawater fish compound feed and high-quality seaweed Enteromorpha produced by Guangdong Yuehai Feed Group. The mass ratio of compound feed to high-quality seaweed is 3:1, and the daily feeding of compound feed and high-quality seaweed The total amount is 2~4% of the total mass of broodstock;

[0020] (2) Artificially induced natural spawning and fertilization of money fish: For the parent fish of money fish that have undergone nutritional improvement and intensive cultivation in step (1), in May of the reproductive period, 2-year-old female...

Embodiment 2

[0022] (1) The broodstock is artificially cultivated from wild seedlings, and the juvenile fish are mainly fed with compound feed. Two months before the breeding period of the golden fish, select healthy broodstock, and carry out nutritional intensive cultivation under the shade of floating raft cages in the coastal harbor sea area, and the seawater flow rate in the breeding sea area is 5~20cm.s -1In between, feed the Yuehai brand A series seawater fish compound feed and high-quality seaweed Enteromorpha produced by Guangdong Yuehai Feed Group. The mass ratio of compound feed to high-quality seaweed is 3:1, and the daily feeding of compound feed and high-quality seaweed The total amount is 2 to 4% of the total mass of broodstock; (2) artificially induced natural spawning and fertilization of goldfish: the broodstock of goldfish that has undergone nutritional improvement and intensive cultivation in step (1), in May of the reproductive period, select 48 3-year-old female fish w...

Embodiment 3

[0024] (1) The broodstock is artificially cultivated from wild seedlings, and the juvenile fish are mainly fed with compound feed. Two months before the breeding period of the golden fish, select healthy broodstock, and carry out nutritional intensive cultivation under the shade of floating raft cages in the coastal harbor sea area, and the seawater flow rate in the breeding sea area is 5~20cm.s -1 In between, feed the Yuehai brand A series seawater fish compound feed and high-quality seaweed Enteromorpha produced by Guangdong Yuehai Feed Group. The mass ratio of compound feed to high-quality seaweed is 3:1, and the daily feeding of compound feed and high-quality seaweed The total amount is 2~4% of the total mass of broodstock;

[0025] (2) Artificially induced natural spawning and fertilization of money fish: For the parent fish of money fish that have undergone nutritional improvement and intensive cultivation in step (1), in June of the reproductive period, 2-year-old femal...

Technical field:

[0001] The invention belongs to the field of aquaculture, and in particular relates to a method for artificially inducing natural spawning and fertilization of money fish. Background technique:

[0002] Goldfish belongs to Perciformes, Scatophagidae, and Scatophagus. It is a tropical-subtropical wide-temperature and wide-salt species. It is distributed in the Indo-Pacific waters, from Kuwait to Vanuatu, and southern Japan. It is distributed in vast waters such as Shrike and Micronesian Islands. The money fish is the only species of fish in this family that has been recorded in my country at present. It is mainly distributed in the South China Sea, the Taiwan Strait and the East China Sea.

[0003] Money fish is a rare seawater economic fish with high ornamental value and food value. Fast growth, strong resistance to disease and stress, not only can grow and develop normally in seawater and brackish water, but also can be cultured and produced in fresh wate...

Examples

Embodiment 1

[0019] (1) The broodstock is artificially cultivated from wild seedlings, and the juvenile fish are mainly fed with compound feed. Two months before the breeding period of the golden fish, select healthy broodstock, and carry out nutritional intensive cultivation under the shade of floating raft cages in the coastal harbor sea area, and the seawater flow rate in the breeding sea area is 5~20cm.s -1 In between, feed the Yuehai brand A series seawater fish compound feed and high-quality seaweed Enteromorpha produced by Guangdong Yuehai Feed Group. The mass ratio of compound feed to high-quality seaweed is 3:1, and the daily feeding of compound feed and high-quality seaweed The total amount is 2~4% of the total mass of broodstock;

[0020] (2) Artificially induced natural spawning and fertilization of money fish: For the parent fish of money fish that have undergone nutritional improvement and intensive cultivation in step (1), in May of the reproductive period, 2-year-old female...

Embodiment 2

[0022] (1) The broodstock is artificially cultivated from wild seedlings, and the juvenile fish are mainly fed with compound feed. Two months before the breeding period of the golden fish, select healthy broodstock, and carry out nutritional intensive cultivation under the shade of floating raft cages in the coastal harbor sea area, and the seawater flow rate in the breeding sea area is 5~20cm.s -1In between, feed the Yuehai brand A series seawater fish compound feed and high-quality seaweed Enteromorpha produced by Guangdong Yuehai Feed Group. The mass ratio of compound feed to high-quality seaweed is 3:1, and the daily feeding of compound feed and high-quality seaweed The total amount is 2 to 4% of the total mass of broodstock; (2) artificially induced natural spawning and fertilization of goldfish: the broodstock of goldfish that has undergone nutritional improvement and intensive cultivation in step (1), in May of the reproductive period, select 48 3-year-old female fish w...

Embodiment 3

[0024] (1) The broodstock is artificially cultivated from wild seedlings, and the juvenile fish are mainly fed with compound feed. Two months before the breeding period of the golden fish, select healthy broodstock, and carry out nutritional intensive cultivation under the shade of floating raft cages in the coastal harbor sea area, and the seawater flow rate in the breeding sea area is 5~20cm.s -1 In between, feed the Yuehai brand A series seawater fish compound feed and high-quality seaweed Enteromorpha produced by Guangdong Yuehai Feed Group. The mass ratio of compound feed to high-quality seaweed is 3:1, and the daily feeding of compound feed and high-quality seaweed The total amount is 2~4% of the total mass of broodstock;

[0025] (2) Artificially induced natural spawning and fertilization of money fish: For the parent fish of money fish that have undergone nutritional improvement and intensive cultivation in step (1), in June of the reproductive period, 2-year-old femal...