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Artificial propagation method of esox reichertii

A black-spotted pike and artificially induced birth technology, applied in the field of black-spotted pike breeding, can solve the problems of low hatching rate, long spawning cycle, and inconsistent spawning time.

Inactive Publication Date: 2014-07-09
HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of non-concentrated spawning time, long spawning cycle, asynchronous maturation of male and female broodstock and low hatching rate in the natural spawning process of the existing wild black-spotted pike; induced labor method

Method used

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specific Embodiment approach 1

[0014] Specific embodiment one: in the present embodiment, the method for artificially induced labor of black-spotted pike is carried out according to the following steps:

[0015] Step 1. Select a female fish with a good body shape, strong activity without injury, a body weight greater than 2kg and over 3 years old as the female parent.

[0016] Select a male fish with good body shape, strong activity without injury, weighing more than 1.5kg and over 3 years old as the male parent;

[0017] Step 2. In April, when the water temperature rises to 8°C, the female and male parents selected in the fishing step 1 are anesthetized and given the first drug injection at the base of the pectoral fins of the broodstock. The injection depth is 5mm. Inject 2.0 μg salmon gonadotropin-releasing hormone analogue and 500 IU chorionic gonadotropin at a ratio of 2.0 μg salmon gonadotropin-releasing hormone analogue and 500 IU chorionic gonadotropin per kilogram of body weight; for males, inject ...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that: step 2 anesthesia is to put the fish in a 5% phenoxyethanol anesthesia solution, anesthetize until the fish body is gently turned and no longer struggling. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment is different from Embodiment 2 in that: step 3 anesthesia is to put the fish in a 5% phenoxyethanol anesthesia solution, anesthetize until the fish body is gently turned and no longer struggling. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses an artificial propagation method of esox reichertii, belongs to the cultivation filed of the esox reichertii, and is mainly used for solving the technical problems that the existing natural egg-laying process of the wild esox reichertii is unfocused in egg-laying time, long in egg-laying period, non-synchronous in maturity of male and female parent fishes and low in hatching rate. The artificial propagation method of the esox reichertii comprises the following steps of: sorting parents; and carrying out artificial impregnation after injecting the medicine twice by S-GnRH (gonadotropin releasing hormone)-A, HCG (Human Chorionic Gonadotropin) or DOM (Dimethoxy Mephentermine) in April, so that the artificial propagation of esox reichertii is completed. The artificial propagation method of the esox reichertii disclosed by the invention can be used for enabling the maturity of male and female parent fishes to be synchronous, enabling the egg-laying time to be focused and shortening the egg-laying period by 15-20 days, and also has a fertility rate of 85%-90% and a hatching rate of 60%-70%. The parent fishes are propagated artificially, the propagation success rate of male fishes is 97% and the propagation success rate of the female fishes is 70%-85%.

Description

technical field [0001] The invention belongs to the field of black-spotted pike breeding, and in particular relates to a method for artificially inducing spawning of black-spotted pike. Background technique [0002] Black-spotted pike Esox reicherti Dybowski, commonly known as pike and hookfish, belongs to Salmoniformes, Pike suborder, Pikeidae, Pike genus. The black-spotted pike is an important economic cold-water fish in China. It is distributed in the cold waters north of 44 degrees north latitude, mainly in the Danube River, the Nester River, Europe, Siberia, the Aral Sea system, North America, and Sakhalin Island. China is distributed in the tributaries of Heilongjiang, Wusuli River, Nenjiang, Songhua River and other river systems. The fish has tough meat, few thorns, delicious taste, and rapid growth. It is a high-quality economic fish that people love very much, and it is expected to become a new domesticated and cultivated species. The black-spotted pike used to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 白庆利张永泉贾钟贺李小龙张玉勇
Owner HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI
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