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Method for artificially-induced spawning of little yellow croaker

A technology for artificially inducing spawning and small yellow croakers, which can be used in fish farming, applications, climate change adaptation, etc., and can solve problems such as soaring prices and reduced production of small yellow croakers

Active Publication Date: 2015-09-16
MARINE FISHERIES RES INST OF ZHEJIANG
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Problems solved by technology

However, since the 1970s, due to factors such as overfishing and environmental deterioration, the production of small yellow croaker has been decreasing year by year, forcing the price of its adult fish to soar. Currently, the market price of fresh fish is more than 80 yuan / kg, and the supply is in short supply.

Method used

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Embodiment

[0020] From the beginning of March 2015 to the end of April 2015, intensive breeding and artificial induction of broodstock were carried out in the 20-square-meter indoor cement pool of the Xishan Test Site of the Zhejiang Ocean Fisheries Research Institute. 200 broodstock weighing 100-200g obtained a total of high-quality fertilized eggs of small yellow croakers 800mL, the specific implementation is as follows:

[0021] 1. Intensive indoor cultivation of broodstock

[0022] In early March, the indoor water temperature reached above 10°C. Select 1-year-old fish, small yellow croaker, with a male-to-female ratio of 2:1 for intensive breeding. Strengthened management methods: water temperature 10-13°C, light 1200LX, salinity 30-35, dissolved oxygen 5-8mg / L, daily water change 40%; feed is oyster meat plus squid pieces at a ratio of 1:1, and is fed twice a day Hey, the feeding amount accounts for 3% of the parent fish's weight.

[0023] 2. Artificial induced labor

[0024] In...

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PUM

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Abstract

The invention discloses a method for artificially-induced spawning of little yellow croaker and belongs to the field of agricultural seawater fry rearing. The method includes that little yellow croaker of one year old and 100-200g in body weight is adopted as parent fishes for domestication strengthening; after strengthening, luteinizing hormone releasing hormone analogue number 2 (LHRH-A2) is adopted for dilution, the diluent is injected in one time, and the parent fishes can spawn in a cement pool after 24-26h. By the method, the little yellow croaker can smoothly spawn in the indoor cement pool, induced spawning rate can reach 75%, fertilized egg hatching rate reaches 80%, and needs on artificial fry cultivation of the little yellow croacker can be met.

Description

field of invention [0001] The invention relates to a method for artificially inducing spawning of fish, which belongs to the field of agricultural seawater seed breeding. Background technique [0002] Small yellow croaker ( Pseudosciaena polyactis Bleeker), also known as Xiaoxian, yellow croaker, etc., belongs to Perciformes (Perciformes), Sciaenidae (Sciaenidae). The small yellow croaker is widely distributed in the East China Sea, the Yellow Sea, the Bohai Sea, and the offshore waters off the west coast of the Korean Peninsula. It is a warm-temperate near-bottom fish. It plays an important role in China's traditional marine fishery. It was once called the "Four Seafoods" together with large yellow croaker, cuttlefish (Mansoni squid) and hairtail. However, since the 1970s, due to factors such as overfishing and environmental degradation, the production of small yellow croaker has been decreasing year by year, forcing the price of its adult fish to soar. Currently, the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCA01K61/00Y02A40/81
Inventor 詹炜陈睿毅楼宝毛国民徐冬冬
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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