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Method for controlling sexual maturity of siganus oramin

A macular basket fish, mature technology, applied in fish farming, climate change adaptation, animal feed and other directions, can solve the problems of short feeding cycle, difficult to meet quantity and quality, and high stress of macular basket fish, etc.

Active Publication Date: 2021-01-15
SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] macular bluefish ( Siganus oramin ) is a herbivorous mariculture fish developed in the southeastern coastal areas of China in recent years. The fish is rich in polyunsaturated fatty acids (HUFA), with tender meat, delicious taste, high nutritional value, and a short feeding cycle. It has become an expert in mariculture It is actively recommended as a new species of large-scale breeding, but the artificial large-scale breeding of the yellow-spotted basketfish has not yet achieved a substantial breakthrough. The development of its farming industry
In addition, the main breeding season of this fish in the coast of South my country is from February to April of the lunar calendar. In the waters of Daya Bay, the macular basketfish breeds concentrated from March to early May. The breeding window is very short, only about one month, and the breeding time The growing period of larvae is in the high temperature summer, and the macular basketfish is stressed under high temperature, and the survival rate of breeding is low. The average survival rate of experienced farmers in summer breeding is not more than 30%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]This embodiment provides a method for controlling the sexual maturity of macular basketfish, which specifically includes the following steps: in December-January when the natural water temperature is still at 17-18.5°C, transfer the broodstock to the cross-temperature pool, and control the water temperature to remain constant , so that the gonads of the broodstock are stopped in the second stage or delay their entry into the reproductive period; after May, when the gonads of the macular basketfish begin to degenerate under natural conditions, transfer the broodstock in the constant temperature pool to the warming pool to simulate the rise of natural water temperature. The temperature rise is controlled at 0.8~1°C / week, and the daily feed is changed to high-protein broodstock feed (the protein content is controlled at 38-45%, which can be manually prepared or directly selected from the high-protein golden pomfret on the market. Feed), mix vitamin E (also called tocopherol,...

Embodiment 2

[0033] Fish are temperature-changing animals, and their gonad development depends on changes in water temperature. In the waters of Daya Bay, under natural conditions, the gonad development of the macular basket fish basically stops from July to November. During this period, the water temperature is high and the bait is abundant. During the fattening period, due to the limited source of bait under natural conditions, the fattening period is relatively long, nearly 5 months. However, in this embodiment, the fattening period of the macular basketfish can be shortened by artificially controlling temperature and enhancing nutrition, and entering the breeding period in advance.

[0034] Specifically, this embodiment provides a method for controlling the sexual maturity of the macular basket fish, which specifically includes the following steps: after June, collect the broodstock of the macular basket fish with degenerated gonads, raise them in a cooling pool, and control the cooling ...

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PUM

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Abstract

The invention discloses a method for controlling sexual maturity of siganus oramin. The method comprises the following steps of from December to January, transferring parent siganus oramin to a constant temperature pool, controlling the water temperature to be continuously at 17-18.5 DEG C, transferring the parent siganus oramin in the constant temperature pool to a heating pool after May, or collecting the parent siganus oramin with degenerated gonads after June, breeding the parent siganus oramin with the degenerated gonads in a cooling pond, controlling the cooling amplitude to be 0.8-1 DEGC / week, after 4 months, successively reducing the water temperature to 16-18 DEG C, keeping the water temperature not reduced any more, and in October, transferrimg the fattened parent siganus oraminto the heating pool from the cooling pool; in the heating pool, simulating the rise of natural water temperature, meanwhile, daily feeding high-protein parent fish feed and feeding fresh algae everyday, wherein vitamin E and vitamin C are added in the parent fish feed; and after raising in the heating pool for 5-6 weeks, raising the water temperature to 22-23 DEG C, starting to manually inject luteinizing hormone releasing hormone and human chorionic gonadotropin, and then raising for one week until the gonads develop to complete sexual maturity.

Description

technical field [0001] The invention relates to a method for controlling the sexual maturity of macular basketfish. Background technique [0002] macular bluefish ( Siganus oramin ) is a herbivorous mariculture fish developed in the southeastern coastal areas of China in recent years. The fish is rich in polyunsaturated fatty acids (HUFA), with tender meat, delicious taste, high nutritional value, and a short feeding cycle. It has become an expert in mariculture It is actively recommended as a new species of large-scale breeding, but the artificial large-scale breeding of the yellow-spotted basketfish has not yet achieved a substantial breakthrough. the development of its farming industry. In addition, the main breeding season of this fish in the coast of South China is from February to April of the lunar calendar. In the waters of Daya Bay, the macular basketfish breeds from March to early May. The breeding window is very short, only about one month, and the breeding time...

Claims

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Application Information

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IPC IPC(8): A01K61/10A23K50/80A23K10/30A23K20/174
CPCA01K61/10A23K50/80A23K10/30A23K20/174Y02A40/81
Inventor 黄小林杨育凯黄忠李涛
Owner SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI