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A detection method for hatching rate of fertilized eggs in salmon spawning grounds under natural conditions

A technology of salmon and natural conditions, applied in the field of fishery, can solve the problems of damaged fertilized eggs and inaccurate hatching rate detection, and achieve the effect of reducing damage

Active Publication Date: 2022-07-19
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

[0004] The purpose of the present invention is to solve the problem that fertilized eggs are damaged in the acquisition of fertilized eggs in the spawning field of salmon under natural conditions, resulting in inaccurate detection of hatching rate. Hatch rate detection method

Method used

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  • A detection method for hatching rate of fertilized eggs in salmon spawning grounds under natural conditions

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Experimental program
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Effect test

specific Embodiment approach 1

[0018] Embodiment 1: Combining figure 1 Explain this embodiment, a kind of detection method of hatching rate of fertilized eggs in salmon spawning ground under natural conditions, it is carried out according to the following steps:

[0019] 1) In the salmon migratory spawning river section, observe the geographical features of the waters from the air, select the expected salmon spawning section, select a number of water areas suitable for salmon spawning, and dig out the bottom 30~ Place a screen-type fish nest at 40cm and bury it. After the salmon spawns and reproduce, the fertilized eggs develop for 3 to 5 months, and the fish nest is dug up to collect the screen-type fish nest containing the salmon fertilized eggs;

[0020] 2) Place the salmon fertilized eggs collected in the previous step in the roe separator, and after removing impurities through the roe separator, the collected fish eggs are detected to remove the number of dead salmon fertilized eggs, and the remaining ...

specific Embodiment approach 2

[0023] Specific implementation mode 2: Combining figure 1 The present embodiment will be described. The difference between the present embodiment and the specific embodiment 1 is that the water inlet of the water passage pipe 2 is trumpet-shaped.

[0024] Others are the same as the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment will be described with reference to the drawings. The difference between this embodiment and Embodiment 1 is that the upper side wall of the fish roe holding basket 4 is uniformly distributed with a plurality of anti-collision rubber blocks 9 along the circumferential direction.

[0026] Others are the same as the first embodiment.

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Abstract

A method for detecting the hatching rate of fertilized eggs in a salmon spawning field under natural conditions relates to the field of fishery. The invention solves the problem that the fertilized eggs are damaged in the acquisition of fertilized eggs in a salmon spawning field under natural conditions, resulting in a hatching rate The problem of inaccurate detection. The invention collects the fertilized eggs of the salmon from the migratory water section of the salmon, and removes the impurities of the fertilized eggs of the collected salmon through a fish egg separator, so as to ensure that the fertilized eggs of the salmon are not damaged as much as possible, and also Remove impurities. The invention removes the impurities of the salmon fertilized eggs by means of water flow, reduces the damage to them, ensures that the normal fish eggs are not damaged, avoids the reduction of the number of normal fish eggs in the later hatching, and improves the detection accuracy of the hatching rate . The invention is applied to the field of salmon.

Description

technical field [0001] The invention relates to the field of fishery, in particular to a method for detecting the hatching rate of fertilized eggs in a salmon spawning ground under natural conditions. Background technique [0002] Salmon (Oncorhynchus keta Walbaum) is a typical anadromous migratory cold-water fish. Because of its special survival, habitat and reproduction characteristics, it has high scientific value, economic value and academic research value. Salmon are mainly distributed in the Pacific Ocean, the Arctic Ocean and the rivers with their mouths at 35°-73° north latitude and 120°-123° east longitude. Salmon usually live in the ocean for 3-5 years (usually 3-5 years old and reach sexual maturity), and travel up the river in autumn. The canyons or the rapids and waterfalls do not retreat. They rush through the obstacles and migrate upstream to the river where they were born for spawning and reproduction. The adult fish do not feed after entering the freshwater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/17
CPCA01K61/17Y02A40/81
Inventor 李培伦王继隆刘伟唐富江鲁万桥
Owner HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI