Method for promoting gonad maturing of pseudorasbora parva out of season

A technology for gonads and gonads of crocodile fish, which is applied in the field of aquatic animal reproduction, can solve problems such as maturation of gonads of crocodile carp that have not been seen yet, and achieve the effects of low equipment requirements, low cost, and small damage
CN102742522BInactive Publication Date: 2014-09-10HUAZHONG AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG AGRI UNIV
Publication Date
2014-09-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of aquatic livestock reproduction, and relates to a method for promoting the gonad maturing of pseudorasbora parva out of season. The method comprises the following steps of: (1) in the middle and lower reaches of Changjiang River, selecting pseudorasbora parva longer than 40mm and heavier than 1.0g in September to October, and carrying the pseudorasbora parva back with an oxygen bag as a parent; (2) soaking the pseudorasbora parva body in 2-3% saline solution for 5 minutes, and temporarily cultivating for 2 weeks in a circulating aquaculture system, wherein the daily feed is 5-8% of the pseudorasbora parva weight in the temporary cultivation period; (3) transferring the pseudorasbora parva into an aquarium with a circulating filtration and oxygen increasing device, wherein the density is 12 pseudorasbora parvas per aquarium; and controlling the water temperature to 22-24 DEG C, the light intensity on water surface is 400lux, and the illumination time is 16-24h / d; (4) feeding the pseudorasbora parvas in the morning and afternoon everyday; and (5) changing water once every 2 weeks, wherein 1 / 2 of the cultivation water is changed; and the physicochemical conditions of water are: the dissolved oxygen is greater than or equal to 7.5mg / L, the pH is 7.5-8.0, the ammonia nitrogen is less than or equal to 0.1mg / L, and the nitrite nitrogen is less than or equal to 0.01mg / L; and cultivating for 2 months to obtain the pseudorasbora parva with mature gonad development.
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Description

technical field

[0001] The invention belongs to the technical field of aquatic animal reproduction, and in particular relates to a method for promoting the maturation of the gonads of the wheat ear fish against the season. Background technique

[0002] Fish toxicity test materials are indispensable for formulating water quality benchmarks or standards for surface water and fishery waters of toxic chemicals, and for evaluating the impact of toxic chemicals on aquatic ecosystems. For a long time, my country has used economic fish such as green carp, grass carp, silver carp and bighead carp as acute toxicity test materials, but due to the long time of sexual maturity and the large size of the fish species, the test is subject to certain restrictions; the Organization for Economic Cooperation and Development also uses (OECO) and the U.S. Environmental Protection Agency (USEPA) recommended fish such as medaka, zebrafish, and black-headed minnow as toxicity test materials, but thes...

Claims

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