Method for identifying Yangtze river system Chinese mitten crab wild larval crabs and pond culture larval crabs
A technology for Chinese mitten crab and crab, which is applied in fish farming, application, climate change adaptation, etc., can solve the problems of germplasm identification and origin identification, etc.
Active Publication Date: 2015-01-21
SHANGHAI OCEAN UNIV +2
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a very high accuracy and very practical method for identifying Chinese mitten crabs in the Yangtze River system in view of the inconvenient problems of existing domestic population identification, germplasm identification, and origin identification of Chinese mitten crabs. The method of detaining wild crabs and pond-cultured detaining crabs can not only provide anti-counterfeiting skills for aquaculture producers, but also provide scientific basis for fishery resource managers and improve on-site law enforcement capabilities
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Embodiment Construction
[0018] The present invention relates to a method for identifying wild mitten crabs and artificially cultured mitten crabs. In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the following examples will further illustrate the present invention.
[0019] For simultaneously proving the identification accuracy of the present invention, grab 40 crabs (20 wild crabs, 20 artificially cultured crabs), mark their actual belongings respectively, and then use the technology of the present invention to carry out the identification test. The specific test method is to measure the carapace length (L1) of each crab and the length of the third leg length (L2) on the right side of the body, and use the formula Z=L2 / (L1×0.732) to calculate the corresponding Z value, when Z≥ When Z<1, it is judged as wild crab; when Z<1, it is judged as artificial cultured crab.
[0020] Crab number
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L1
L2 ...
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The invention discloses a method for identifying Yangtze river system Chinese mitten crab wild larval crabs and pond culture larval crabs. The method includes the following steps of measuring, calculating and identifying, wherein in the step of measuring, the lengths of the carapace and the third paraeiopod meropodite of each Chinese mitten crab wild larval crab are measured through a vernier caliper, and the obtained data are L1 and L2 respectively; in the step of calculating, the formula that Z=L2 / (L1*0.730-0.732) is satisfied; in the step of identifying, when Z is larger than or equals to 1, the crabs are judged to be the wild larval crabs, and when Z is smaller than 1, the crabs are judged to be artificially cultured larval crabs. According to the method, after comparison of a lot of morphological feature parameters, the simple and practical method is created, only two morphological parameters are measured to quickly identify the wild larval crabs and the artificially cultured larval crabs, and identification accuracy reaches more than 95%.
Description
technical field [0001] The invention relates to the technical field of aquaculture seed identification, in particular to a method for identifying wild mitten crabs and pond cultured mitten crabs in the Yangtze River system. Background technique [0002] Chinese mitten crab, commonly known as river crab and hairy crab, has become an important freshwater economic crab in my country. However, due to the high price of large-scale Chinese mitten crab parents, and the relatively low survival rate of the parents, many river crab nursery farms pursue economic benefits one-sidedly. , using small-scale parents (female: 60-100g / only; male: 80-150g / only) for artificial breeding, resulting in serious germplasm degradation of the Chinese mitten crab breeding population in the Yangtze River system, and the blindness of Chinese mitten crabs between different water systems. The introduction has intensified the germplasm mixing of Chinese mitten crabs in the Yangtze River system, resulting in s...
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IPC IPC(8): A01K61/00
CPCY02A40/81A01K61/00
Inventor 吴旭干何杰赵恒亮刘皓王幼鹏成永旭
Owner SHANGHAI OCEAN UNIV