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Blue crab net cage fat-breeding method

A net cage and ointment breeding technology, which is applied in climate change adaptation, fishing, animal feed, etc., can solve the problems of killing each other, disease infection, etc., and achieve the effect of low cost, convenient operation and harvesting

Inactive Publication Date: 2010-10-13
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-density pond breeding often faces the risk of mutual killing and disease transmission

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Bamboo net cages are selected, and the length, width and height are 2m×1m×1m. Some non-toxic branches, plastic pipes, etc. are placed at the bottom of the cage as shelters. Select female crabs with complete appendages, healthy body, and have been mated for stocking, and stocking density is 7 to 10 crabs / m 2 . The cages sink into seawater 1-2m in summer, and the cages are semi-submerged in autumn. The feeding of small miscellaneous fish and shrimps is generally controlled at 7% to 12% of the total weight of blue crabs; low-value shellfish oysters, clams and blue clams can be controlled at 20% to 35% of the total weight of blue crabs. During the creaming period, the fat is caught and the thin is left, and the rounds are caught and released. The creaming time is 2 weeks, the survival rate of blue crabs is more than 95%, and the weight gain rate is 10% to 15%.

Embodiment 2

[0018] Use plastic netting cages, the length, width and height of which are 2m×1m×1m. Select female crabs with complete appendages, healthy body and have been mated for stocking, and stocking density is 5-7 crabs / m 2 . Other cream raising measures are identical with embodiment 1. The creaming time is 4 weeks, the survival rate of blue crabs is more than 95%, and the weight gain rate is 15-20%. Low-value shellfish include oysters, short-toothed clams and snails.

Embodiment 3

[0020] Use polyethylene net cages, the length, width and height of which are 3m×2m×1m. Select female crabs with complete appendages, healthy body and have been mated for stocking, and the stocking density is 5 / m 2 . Other cream raising measures are identical with embodiment 1. The creaming time is 3 weeks, the survival rate of blue crabs is more than 95%, and the weight gain rate is 15%. Low-value shellfish are selected from oysters, clams and snails.

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PUM

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Abstract

The invention provides a method to culture crab roe with a blue crab net cage, relating to an aquiculture method and providing a crab roe culturing method with the blue crab net cage, and the method has high survival rate of crabs and weight growth rate, low production cost, no deteriorating cultivation substrate, convenient operation and harvesting and can enhance the production efficiency and market efficiency. The survival rate and the weight growth rate of the blue crab can be higher than 95 percent, and the weight growth rate is increased by about 15 percent, which effectively improves the cultivation quality of the blue crab and the growth of income. A shielding object is positioned at the bottom of the net cage, the upper opening of the net cage is covered and tied by a mesh patch,and 5 to 10 net cages are grouped and semi-submerged or submerged into water in parallel. The crab roe culturing measures are that: (1) mated female crabs with complete appendages are divided into two kinds: one kind is just mated female crabs, and the other is the female crabs being mated for one month, and the two kinds are cultured respectively; (2) the culturing density of the female crabs is5 to 10 crabs / m<2>; (3) the daily feeding quantity of small fishes and shrimps is controlled between 5 to 12 percent of the total weight of the blue crab, and that of low value small shellfishes is controlled between 20 to 35 percent of the total weight of the blue crab.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a net-cage culture method for blue crabs which promotes weight gain and ovarian development of female crabs. Background technique [0002] Scylla is an important marine cultured crab in southern my country. Sexually mature female crabs are called "red paste crabs" because of the red ovaries on both sides of the carapace. "Red Gyoza" is delicious and nutritious, and is favored by consumers. Using artificial fattening technology to fatten lean crabs to promote fattening has the advantages of short breeding period, high market price and significant economic benefits. At present, pond culture is mainly used to promote cream fattening (Chen Fenshen. Scylla serrata to promote cream fattening and efficiency enhancement technology, Scientific Fish Farming, 2004, 10: 26-27). High-density pond breeding often faces the risk of cannibalism and disease transmission. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00A23K1/18A01K69/00A23K50/80
CPCY02A40/81
Inventor 叶海辉王桂忠林琼武李少菁
Owner XIAMEN UNIV