Polyculture method for saury and river crabs and freshwater shrimps

A saury and river crab technology, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of insufficient utilization of water bodies, low survival rate of second-year saury breeding, waste of effective breeding area of ​​ponds, etc., to solve the problem of bait supply , high fecundity, improve the effect of breeding survival rate

Active Publication Date: 2018-11-20
上海市水产研究所(上海市水产技术推广站)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the saury has been successfully artificially propagated at present, and the artificial breeding has a certain breeding area, there has been no effective solution to the bait supply link in the artificial breeding process of the saury. There is the problem of low survival rate (30%-50%) of second-age saury culture, and there is also a lack of more diverse and more suitable farming models; in addition, in aquaculture, if a pond only raises one species, the water body cannot be fully utilized , also wasting the effective breeding area of ​​the pond
[0006] But there is no report yet about a kind of polyculture method of saury, river crab and freshwater shrimp

Method used

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  • Polyculture method for saury and river crabs and freshwater shrimps

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Effect test

Embodiment 1

[0023] Production technology steps include:

[0024] 1. Pond selection and preparation: Choose a pond with an area of ​​5-10 mu, with a flat bottom, complete water inlet and drainage facilities, and a rectangular east-west direction. After the pond was dried at the end of the previous year, the water at the bottom of the pond was pumped out to keep the bottom of the pond dry, and the silt at the bottom of the pond was removed to expose it to the sun. The pond used was disinfected in the same year, using quicklime 75- 100kg / mu; or 20-30ppm of bleaching powder into the water and sprinkle the whole pond, and the disinfection time is 20 days to 1 month before the seedlings are stocked; When the water inlet is filtered with a 60-mesh screen bag to prevent wild fish and harmful organisms from entering the pond, enter the water 50cm, and then apply the fermented organic fertilizer (such as cow dung, pig manure, etc.) at a rate of 75-100kg / mu. The amount of base fertilizer is applied...

Embodiment 2

[0030] Location: Polyculture was carried out in the three ponds No. 11, No. 12, and No. 13 of Xinghuo Branch of Fengxian Research Base of Shanghai Fisheries Research Institute. Crab species were stocked on February 4, 2017; a total of 17,500 crab species were stocked. 50 per catty; saury species were stocked on June 6, 2017, with a total of 2,700 species, and the average size of the species was 7.64g / tail; green shrimp species were stocked on May 6, 2017, and a total of 30 catties were stocked . Fishing of river crabs started in early November, 2017. After nine months of cultivation, 2,170.5 catties of crabs were harvested, and the average size of male and female crabs was 2.23 taels per crab; the saury was fished by pulling nets on November 30, 2017. After six months of breeding, the harvest was two 1,954 saury, with an average size of 30.8g / tail, (survival rates of 81.7%, 71%, and 64.3%); 28,888 self-propagating saury, with an average size of 7.62g / tail; 330 catties of freshw...

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Abstract

The invention relates to the field of aquatic product culture and in particular discloses a polyculture method for saury and river crabs and freshwater shrimps. The polyculture method comprises the following steps: selecting and preparing a pond; constructing escape prevention facilities; launching seedlings of different types; carrying out daily management; fishing different types, and the like.The polyculture method has the outstanding characteristics that a mode different from a conventional single culture mode of saury and river crabs and freshwater shrimps is created, culture water bodies are sufficiently utilized, the saury, the river crabs and the freshwater shrimps are cultured at middle and upper layers and bottom layers of the water bodies in a same pond according to life habitsof the fishes, and the three types of seedlings of the saury, and the river crabs and the freshwater shrimps are launched at different times and polycultured, so that the utilization rate of a pond culture water body is increased, and the production capability of the pond is improved; the invention researches a novel polyculture mode, and develops a novel culture technique.

Description

technical field [0001] The invention relates to the field of aquatic product cultivation, in particular to a method for polyculture of saury, river crab and freshwater shrimp. Background technique [0002] Swordfish, scientific name (Coilia ectenes Jordan), also known as Changjiang swordfish, hairy anchovy, is a small pelagic migratory fish. The shape of the saury is long and thin, resembling a sharp knife, and it is silvery white. It feeds on copepods, cladoceras, and small fish and shrimps. The meat of the saury is tender and delicious, fat but not greasy. Saury, shad, puffer and catfish are known as the "Four Fresh Foods of the Yangtze River". [0003] River crab, scientific name Eriocheir sinensis (Eriocheir sinensis), belongs to Arthropoda, Crustacea Decapod, Arch Crabidae, Eriocheir genus. Also known as crabs and hairy crabs, they inhabit caves in rivers and ponds and hide among gravel and aquatic plants. They are omnivores. River crab meat is delicious, nutritious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10A01K61/59
CPCA01K61/10A01K61/59Y02A40/81
Inventor 王建军陆根海施永海刘建忠张根玉朱建明
Owner 上海市水产研究所(上海市水产技术推广站)
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