Blue crab battery rearing and fattening method

A technology of blue crabs and cages, applied in fish farming, climate change adaptation, fishing, etc., can solve problems such as disease infection, mutual killing, etc., to achieve large or small scale, increase economic income, and facilitate operation and harvest. Effect

Inactive Publication Date: 2008-05-28
XIAMEN UNIV
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  • Summary
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  • Claims
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AI Technical Summary

Problems solved by technology

However, 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

[0015] (1) Breeding facilities: The basic structure of the cage is to use a polyethylene rope with a length of 100m and a diameter of 3cm as the big rope, and a float with a buoyancy of 15-20kg is provided at a distance of 4m, and the two ends of the big rope are fixed on the seabed. The row spacing of Dalong is about 5m. Crab pots are cylindrical, 120cm in height, 30-40cm in diameter, separated into 6 layers, and each layer has a small door for feeding. Crab cages are fixed on the big rice pole with a diameter of 1 cm polyethylene rope, and the distance between the cages is 1 m.

[0016] (2) Fattening measures: The fattening objects are female and male crabs with complete appendages, healthy body and insufficient plumpness, or female crabs that have mated but whose ovaries are immature. When raising a single cage, sink the crab cage into the seawater about 1m, and adjust the depth of the crab cage in the seawater according to the water temperature and light intensity. The m...

Embodiment 2

[0019] (1) Breeding facilities: The basic structure of the cage is to use a polyethylene rope with a length of 60m and a diameter of 2cm as the big rope, and a float with a buoyancy of 15kg is provided at a distance of 4m, and the two ends of the big rope are fixed on the seabed. The row spacing of Dalong is 5.5m. Crab cages are cylindrical, 80cm in height, 30-40cm in diameter, separated into 4 layers, and each layer has a small door for feeding. The crab cages are fixed on the large rice paddles with polyethylene ropes with a diameter of 0.6 cm, and the distance between the cages is 1 m.

[0020] (2) Fattening measures: The fattening objects are female and male crabs with complete appendages, healthy body and insufficient plumpness, or female crabs that have mated but whose ovaries are immature. When raising a single cage, sink the crab cage into the seawater 0.8m, and adjust the depth of the crab cage in the seawater according to the water temperature and light intensity. ...

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PUM

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Abstract

The invention provides a cage rearing and fattening method of a blue crab, relating to an aquiculture method, providing a cage rearing and fattening method of the blue crab without land occupancy, with non-deteriorating culture substrate, various scale, convenient operation and harvesting ways, high survival ratio and rate of live weight growth and improvement of culture quality and goods grade. A rope is taken as a large rope for the structure of cage rearing, floaters are arranged every 3 to 5m, and both ends of the large rope are fixed down the bottom of a sea, with a line spacing between 4 to 6m; the crab cage is cylinder-shaped, with a height of 80 to 120cm and a diameter of 30 to 40cm, and separated into 4 to 6 layers; a small door is arranged for every layer to cast bait, and the crab cage is fixed on the large rope by a thin rope with a diameter ranging from 0.6 to 1cm. The fattening measures are that: fattening objects are female or male crabs with complete appendages and insufficient fatness or those mated female crabs with immature ovary, and a single cage is used for cage rearing for every crab and sunk to the seawater; the daily feeding quantity of low value shellfishes is controlled between 20 to 30 percent of the total weight of the blue crab, and that of small fishes and shrimps is controlled between 5 to 12 percent of the total weight of the blue crab.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a mud crab cage fattening method which adopts crab cage culture to promote weight gain and ovary development of female crabs. Background technique [0002] Scylla is an important marine cultured crab in southern my country. After some adult crabs reach the commodity standard, the market price is low due to insufficient plumpness or immature female crab ovaries, and the breeding benefits are not ideal. Using artificial fattening technology to fatten lean crabs to promote creaming can increase the weight of cultured blue crabs and improve the quality of breeding, and has the advantages of short breeding period and significant economic benefits. The currently used fattening technology is mainly earthen pond fattening (Chen Fenshen. Scylla serrata fattening and efficiency-enhancing technology, Scientific Fish Farming, 2004, 10: 26-27). However, high-density pond breeding often faces the ris...

Claims

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Application Information

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Patent Type & Authority Applications(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
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