Outdoor earth pond ecological culturing of portunid juvenile crabs

An ecological technology for swimming crabs three warts, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of difficulty in adapting to the natural environment, low survival rate of breeding, etc., and achieves significant economic benefits, high survival rate, and broad development. Foreground effect

Active Publication Date: 2007-07-18
辽宁每日农业集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an outdoor earthen pond ecological seedling cultivation of Portunus trituberculatus, which solves the problem that the industrialized seedling cultivation in the prior art is difficult to adapt to the natural environment and the survival rate of cultivati

Method used

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Effect test

Embodiment 1

[0007] Process technology and key technology: the outdoor earthen pond ecological breeding of Portunus trituberculatus utilizes the existing original river crab ecological seedling pond (earth pond) or the newly-built seedling earthen pond for outdoor earthen pond ecological seedling cultivation, which is based on the climate characteristics of the northern region's seedling cultivation period and adopts early artificial maturation The method solves the problem of climate constraints in the process of industrialized seedling raising in the south and the northward transfer of breeding technology. The main difference between the ecological seedling raising method and the industrial seedling raising method is that the key technology of ecological seedling raising is to imitate the natural ecological environment of the ocean to hatch; artificially manufacture attachments, increase shelling and concealment conditions, reduce mutual killing of crab seedlings, and improve the survival ...

Embodiment 2

[0009] Breeding crab cultivation: Generally, the parent crabs are purchased in March of the year, and the parent crabs are placed in the nursery room to raise the temperature to 12-18 degrees in late March, and the sunlight is controlled below 5ix. For fresh bait such as minced fish, the feeding amount is 10% of the parent crab's weight, and the stocking density of the parent crab is 3-5 / m2. Carry out low temperature pre-production to achieve the purpose of early production and emergence.

Embodiment 3

[0011] Crab seedling hatching (oxygenated hatching and larvae cultivation): When the parent crab embryo develops to the original zoea-like larvae, purple spots appear at the base of the frontal horn, and when the outdoor water temperature naturally rises to 15-18, move the parent crab to be born indoors out of the outdoor hanging cage Oviposition is carried out to induce spawning and hatch young. Generally, there are 10 parent crabs per square meter of net cages, and the selected ones that develop synchronously are loaded into a cage for natural rowing. The discharge density of larvae is 30,000 per cubic meter of water body. At the same time, larvae are cultivated and live rotifers are put in. With the increase of larvae density and food intake, the feeding amount of rotifers is continuously increased. If the supply of live rotifers is insufficient, copepods, artemia nauplii or minced fish and shrimp can be supplemented. The whole seedling raising process is a one-time injecti...

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Abstract

A method for culturing the larvae of triverrucous portunid in outdoor pond includes such steps as providing male parent portunid and female parent portunid, indoor culture at 12-18 deg.C by feeding living clam worm, oxytocia, incubation, and culturing larvae in an artificial ocean environment by feeding living bait and building hidden caves for preventing the mutual damage between larvae.

Description

Technical field: [0001] The invention relates to an outdoor earthen pond ecological breeding of portunus trituberculatus for aquaculture. Background technique: [0002] Portunus trituberculatus is a large, fast-growing, delicious meat with high edible value. It is rich in nutrition and has a large edible proportion. It not only has high nutritional value, but also has medicinal value such as clearing away heat, dispersing blood and nourishing yin. It is mainly produced in the Yellow Sea, Bohai Sea and East China Sea. Due to the improvement of people's living standards, marine crabs cannot meet the needs, and artificial breeding has begun in recent years. The existing industrialized breeding of portunus trituberculatus is relatively common in China. Industrialized seedlings are artificially created to adapt to the best conditions for spawning and hatching of portunus trituberculatus. Especially in the megalopa stage of seedlings, high doses of antibiotics, temperature contro...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 张玉满熊志厚王德令韩仁山陈丽炜张杨熊宇
Owner 辽宁每日农业集团有限公司
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