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Method for preventing green crabs from killing each other

A technology of cannibalizing and killing blue crabs, applied in fish farming, application, climate change adaptation, etc., can solve problems such as reducing breeding efficiency, and achieve the goal of improving survival rate and output, reducing killing behavior of blue crabs, and improving survival rate. Effect

Inactive Publication Date: 2014-06-11
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of breeding, methods such as reducing the breeding density and placing shelters are usually adopted to reduce the occurrence of attacks and killing behaviors among mud crabs, but these measures have no substantial change in the killing behavior of mud crabs, and at the same time reduce the breeding benefits. Therefore urgently need to develop a kind of breeding technology that improves economic benefit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] From the young crabs to the crab breeding stage, the effect of using the method of inhibiting the cannibalism of blue crabs: the stocking density of young crabs is 3000 / mu, and other water temperature, salinity, and water quality conditions are carried out according to the breeding specifications. Inhibiting the bait by mass percentage, the content of L-tryptophan is 0.5% of the dry weight of the artificial bait or natural bait, and feeding the inhibiting bait every day; when it is close to the stage of detaining crabs, the inhibiting bait is based on the mass percentage, L-tryptophan The content of acid is 0.8% of the dry weight of artificial compound bait or natural bait, and the inhibiting bait is fed every day. After about 45 days of breeding and management, the young crabs can be cultivated into buckle crabs with a carapace width of about 2.5 cm. Compared with the control group, the survival rate of the experimental group increased by 21.3%.

Embodiment 2

[0029] The effect of the method of inhibiting cannibalism of blue crabs from the breeding stage of crabs to small-sized (below 250g) finished crabs: the stocking density of crabs is 1000 / mu, and other water temperature, salinity, and water quality conditions are carried out in accordance with the breeding specifications. In each molting (molting) cycle, the inhibitory bait is fed every day from 5 days before the molting to the day of the molting. The content of the inhibitory bait is calculated by mass percentage, and the content of L-tryptophan is the dry weight of artificial compound bait or natural bait 0.9%. After about 75 days of breeding, the buckle crab can reach a small-sized finished crab with a weight of 150-200g. Compared with the control group, the survival rate of the experimental group increased by 18.6%.

Embodiment 3

[0031] The effect of the method of inhibiting the cannibalism of blue crabs from the breeding stage of crabs to large-scale (above 250g) finished crabs: the stocking density of crabs is 800 / mu, and other water temperature, salinity, and water quality conditions are carried out in accordance with the breeding specifications. In each molting (molting) cycle, the inhibitory bait is fed every day from 5 days before the molting to the day of the molting. The content of the inhibitory bait is calculated by mass percentage, and the content of L-tryptophan is the dry weight of artificial compound bait or natural bait 1.0% of. After 115 days of breeding, the buckle crabs have grown into large-scale blue crabs with a weight of more than 300g. Compared with the control group, the survival rate of the experimental group increased by 15.1%.

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Abstract

The invention provides a method for preventing green crabs from killing each other and relates to an aquaculture method. At a breeding stage from young crabs to buckle crabs, inhibition baits are fed everyday, the inhibition baits are composed of inhibitors and baits, the inhibitors are L-tryptophan, and the baits are artificial baits or natural baits; and or at a breeding stage from the buckle crabs to mature crabs, inhabitation baits are fed everyday from five days before ecdysis to the ecdysis day, the inhibition baits are composed of inhibitors and baits, the inhibitors are L-tryptophan, and the baits are artificial baits or natural baits.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a method for inhibiting cannibalism of blue crabs. Background technique [0002] Scylla paramamosain is a famous seawater edible crab in my country. In recent years, its cultivation has flourished in southern provinces, with an annual output of 116,000 tons, and has developed into an important marine aquaculture industry. Scylla is a kind of crab with a serious habit of killing each other, especially in the moulting stage, it is often eaten by its kind, which greatly affects the health and aquaculture output of Scylla. In terms of breeding, methods such as reducing the breeding density and placing shelters are usually adopted to reduce the occurrence of attacks and killing behaviors among mud crabs, but these measures have no substantial change in the killing behavior of mud crabs, and at the same time reduce the breeding benefits. Therefore urgently need to develop a kind of breeding te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 叶海辉黄辉洋王桂忠林琼武李少菁
Owner XIAMEN UNIV
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