Judgment method for viability of juvenile eriocheir sinensis

A technology for Chinese mitten crab and juvenile crab, applied in fish farming, climate change adaptation, animal husbandry, etc., can solve the problem of difficulty in judging the vitality of juvenile crabs, affecting the quality of adult crab products, and wasting breeding resources from juvenile crabs to adult crabs. and other problems, to achieve good reliability, improve product quality, and save breeding resources.

Active Publication Date: 2021-09-21
SHANGHAI OCEAN UNIV
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Problems solved by technology

[0003] The critical period for fattening and growth is from the first instar crab species to adult crab after overwintering. At this stage, the vitality of young crabs needs to be closely observed. Because of their small size and immature body surface, it is difficult to judge the vitality of young crabs. Households often adopt "quantity wins" to let young crabs be eliminated naturally, which not only wastes the breeding resources from young crabs to adult crabs, but also greatly affects the product quality of adult crabs after fattening

Method used

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  • Judgment method for viability of juvenile eriocheir sinensis
  • Judgment method for viability of juvenile eriocheir sinensis
  • Judgment method for viability of juvenile eriocheir sinensis

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Experimental program
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Embodiment 1

[0028] The establishment of the viability judging method of embodiment 1 Chinese mitten crab juvenile crab

[0029] Step 1: Sampling young crab seedlings, and measuring parameters related to vitality intensity (tissue supernatant osmotic pressure, ion concentration, non-specific immune enzyme activity) based on different salinity water bodies.

[0030] Step (1): Randomly sample the juvenile crabs of the same batch, and the sampling ratio is 1‰-3‰ of the weight of each batch of juvenile crabs. Specifically, 900 juvenile crabs with neat specifications, no body trauma, and healthy limbs were selected from the Chongming base of Shanghai Ocean University.

[0031] Step (2): use bittern and tap water after aeration, and adopt the step-by-step salt-increasing method to prepare water bodies with salinity of 8‰, 16‰, and 32‰.

[0032] Step (3): Set up 3 parallel groups for each salinity-stressed water body. In step (1), sample young crabs and put them into each group of water bodies e...

Embodiment 2

[0052]In March 2019, the study on the osmotic regulation and immunity of Chinese mitten crab juveniles under acute salinity stress was carried out at the experimental base of Shanghai Ocean University. Three cultivation ponds with neat specifications, no physical trauma, and mitten crabs were selected from the Chongming base of Shanghai Ocean University. Each 1000 juvenile crabs with sound limbs, after temporary support, utilize the method of embodiment 1 to carry out viability judgment to the juvenile crabs of Chinese mitten crab, specifically:

[0053] (1) Randomly sample 100 juvenile crabs with neat specifications, no body trauma, and healthy limbs in 3 breeding ponds at the Chongming base of Shanghai Ocean University.

[0054] (2) Using salt bittern and tap water after aeration, the water body with salinity of 0‰, 8‰, 16‰, and 32‰ was prepared by gradually increasing salt method.

[0055] (3) Set up three parallel groups for each salinity-stressed water body. Step (1) Samp...

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Abstract

The invention discloses a judgment method for viability of juvenile eriocheir sinensis, and relates to the field of river crab culture in the modern agricultural industry. According to the judgment method for the viability of the juvenile eriocheir sinensis, the viability of the juvenile eriocheir sinensis is judged by analyzing the stress expression and osmotic pressure regulation condition of the eriocheir sinensis under salinity stress. The judgment method for the viability of the juvenile eriocheir sinensis established by the invention has extremely good reliability, the breeding resources from the juvenile crab to the adult crab stage are saved, and meanwhile, the survival of the superior and the inferior is carried out according to the judgment result of the viability, so that the product quality of the adult crab after the eriocheir sinensis is fattened can be effectively improved.

Description

technical field [0001] The invention relates to the field of river crab culture in modern agricultural industry, in particular to a method for judging the viability of juvenile Chinese mitten crabs. Background technique [0002] Chinese mitten crab (Eriocheir sinensis) gets its name because of the dense hairs on the inner and outer edges of its chelicerae. Freshwater crab species originate in China and are widely distributed in streams and rivers along the eastern coast of China. Because of their delicious taste and high nutritional value, they are deeply loved by consumers. [0003] The critical period for fattening and growth is from the first instar crab species to adult crab after overwintering. At this stage, the vitality of young crabs needs to be closely observed. Because of their small size and immature body surface, it is difficult to judge the vitality of young crabs. Households often adopt "quantity wins" to let young crabs be eliminated naturally, which not only...

Claims

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Application Information

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IPC IPC(8): A01K61/59G01N33/48
CPCA01K61/59G01N33/48Y02A40/81
Inventor 杨志刚杨帆赵雪健成永旭
Owner SHANGHAI OCEAN UNIV
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