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Method for artificial fertilization and hatching of hexagrammos otakii

A technology for artificial hatching and hexagonal fish, which is applied in the field of insemination and hatching of hexagonal fish, can solve the problems of low insemination rate and low hatching rate, and achieve the effects of improving insemination rate, simple operation process, and improving large-scale production capacity

Inactive Publication Date: 2010-07-14
MARICULTURE INST OF SHANDONG PROVINCE
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Problems solved by technology

[0004] The invention provides a method for artificial insemination and hatching of hexagonal fish, which solves the problems of low fertilization rate and low hatching rate caused by the viscosity of hexagonal fish eggs in seawater fish and turning them into lumps when meeting seawater

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  • Method for artificial fertilization and hatching of hexagrammos otakii
  • Method for artificial fertilization and hatching of hexagrammos otakii

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Embodiment Construction

[0019] see figure 1 , the hexaline fish insemination and hatching method of the present invention comprises the following steps:

[0020] (1) Breeding and maturation of broodstock

[0021] Broodstock selection is carried out from October to November every year, and six line fish broodstock with a weight of 800-1500g, good character and good development degree are selected to be cultivated in the breeding pond, and the ratio of male to female is 2:1. Sand filter natural sea water is used for cultivation, the daily water flow is 4 to 6 times the pool water volume, continuous aeration, wild fresh miscellaneous fish are fed, and the daily feeding amount is 3%-5% of the broodstock body weight.

[0022] (2) Artificial insemination

[0023] After a period of cultivation and maturation of broodstock, generally 30-40 days, select mature broodstock roe whose egg diameter has reached 1.8mm-2.2mm, and collect the roe into a medical dissection tray with a smooth and clean surface. Since...

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Abstract

The invention provides a method for artificial fertilization and hatching of hexagrammos otakii, which is used for solving the problems that spawns of the hexagrammos otakii in marine fishes have low fertilization rate and hatchability because the spawns have viscosity and become agglomerates when meeting sea water. The method adopts an artificial method to shape the spawns of the hexagrammos otakii into a planar type and then perform fertilization to prevent the viscid spawns from becoming the agglomerates so as to ensure that the spawns can fully and effectively contact sperms during the fertilization, the spawn fertilization rate is improved and can reach 93 percent under an artificial condition; besides, the method adopts hanging type hatching for spawn segments after artificial planar shaping to ensure that oosperms can obtain sufficient dissolved oxygen during the hatching and greatly improve the hatchability of the oosperms. Experiments show that the hatchability of the oosperms reaches 85 percent and is far more than 56 percent which is achieved under the conditions of the prior art.

Description

technical field [0001] The invention relates to a fish fertilization and hatching method, in particular to a six line fish fertilization and hatching method. Background technique [0002] Hexagrammos otakii J&S in the ocean is mainly distributed in the coasts of Shandong and Liaoning, my country, commonly known as yellow croaker and yellow stick, belonging to the family Scorpionidae and Hexagrammos otakii. 8℃~23℃, the optimum growth water temperature is 16~21℃. It has delicious taste and high economic value, and is very popular with farmers and consumers in the northern coastal areas of my country. The eggs of six-line fish are relatively large, with an egg diameter of 2.0-2.2mm, and the broodstock has low eggs, which are sticky eggs, which are easy to squeeze and agglomerate. At this stage, there are few practices and publications on the artificial insemination and hatching techniques of sticky eggs in seawater fish, which greatly limits the development of the industrializ...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 潘雷郭文菅玉霞胡发文高凤祥张少春王雪
Owner MARICULTURE INST OF SHANDONG PROVINCE
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