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A method for improving the survival rate of japonica larvae

A technology of survival rate and larvae, applied in application, climate change adaptation, fish farming, etc., can solve problems such as deterioration of water quality in larval breeding ponds, low survival rate of larvae, and difficulty in molting of larvae, so that water quality is not easy to deteriorate and promotes rapid development. , the effect of preventing outbreaks of filamentous bacterial disease

Active Publication Date: 2020-01-10
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the survival rate of its larvae is low. The reason may be that the unsaturated fatty acid content of the selected Monocellular algae cannot meet the needs of the larvae development of Japanese larvae, which makes it difficult for the larvae to molt. During the early stage of using the single-celled algae, but in the subsequent cultivation process, the single-celled algae was not used, which caused the water quality of the larvae cultivation pond to deteriorate, leading to the occurrence of diseases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1. A method for improving the survival rate of Japanese larvae, the steps are as follows:

[0039] Disinfection of oviposit crabs: Before entering the pool, oviposit crabs are disinfected with a nystatin solution with a concentration of 40 mg / L and rinsed with clean water to prevent the oviposit crabs from bringing filamentous bacteria into the nursery pond.

[0040] Larvae collection: Japonica larvae are phototaxis, and larvae with strong vitality will gather in places with strong light, but those with poor vitality or dead larvae generally sink to the bottom. After the japonica larvae hatch, a fluorescent lamp is placed on the side of the hatching pond, so that the energetic larvae gather in a place with strong light and collect the energetic larvae and transfer them to the larvae breeding pond.

[0041] Strengthening and disinfection of live bait: rotifers were fortified with chlorella before feeding and disinfected with nystatin solution when feeding; Artem...

Embodiment 2

[0046] Example 2. A method for improving the survival rate of Japanese larvae, the steps are as follows:

[0047] Disinfection of oviposit crabs: Before entering the pond, oviposit crabs are disinfected with nystatin solution with a concentration of 50 mg / L and rinsed with clean water to prevent the oviposit crabs from bringing filamentous bacteria into the nursery pond.

[0048] Larvae collection: Japonica larvae are phototaxis, and larvae with strong vitality will gather in places with strong light, but those with poor vitality or dead larvae generally sink to the bottom. After the japonica larvae hatch, a fluorescent lamp is placed on the side of the hatching pond, so that the energetic larvae gather in a place with strong light and collect the energetic larvae and transfer them to the larvae breeding pond.

[0049] Strengthening and disinfection of live bait: rotifers were fortified with chlorella before feeding and disinfected with nystatin solution when feeding; Artemia...

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Abstract

A method for improving a survival rate of charybdis japonica larvae comprises the steps of disinfection of ovigerous crabs, collection of larvae, disinfection of live food and combination of various baits and the like. The method of performing combined feeding of skeletonema costatum, chlorella, live rotifers and artemia nauplii not only can regulate water quality and makes the water quality not deteriorate easily, but also meets nutrition requirements of the charybdis japonica larvae, the charybdis japonica larvae smoothly casts off a skin and performs metamorphosis development, and thus the survival rate of the larvae is improved. The ovigerous crabs and the rotifers and artemia nauplii as the live baits are disinfected, filamentous bacterium disease pathogens are prevented from being brought into a culture tank, and the outbreak of the filamentous bacterium disease in the process of cultivating the charybdis japonica larvae is effectively prevented. According to characteristics of development of the charybdis japonica larvae, the method is scientific and reasonable, the survival rate of the charybdis japonica larvae is improved, and rapid development of the charybdis japonica breeding industry is promoted.

Description

technical field [0001] The invention relates to the technical field of crustacean seedling cultivation, in particular to a method for improving the survival rate of japonica larvae. Background technique [0002] Japanese catfish ( Charybdis japonica ), commonly known as Shiza crab, Chijiahong, etc., is a large-scale marine edible crab, mainly distributed in the coastal areas of my country, Japan, North Korea, Southeast Asia and other coastal islands and reefs and shallow waters. Japanese crab is rich in nutrition, has the effects of clearing away heat, nourishing, reducing swelling, etc., and has high economic value. It is a potential breeding crab species. [0003] At present, it is found that the survival rate of larvae is low in the process of artificial breeding of Japanese catfish, especially in zoar larvae metamorphosis to flea period, flea In the three stages of metamorphosis into megalopa and megalopa metamorphosis into larvae, the mortality rate of larvae is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/59
CPCY02A40/81
Inventor 陈建华熊文超王玉飞高焕徐加涛阎斌伦
Owner HUAIHAI INST OF TECH
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