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Technique of rearing fry of obscure puffer in low salinity sea water

A technology of puffer obscurus and low salinity, applied in the field of artificial breeding of freshwater fish, can solve the problems of low survival rate of fish species, waste of fresh water resources, wound inflammation, etc.

Active Publication Date: 2013-12-04
SHANGHAI FISHERIES RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The routine breeding of puffer obscurus includes the black puffer pond (that is, the cultivation of the black puffer seedlings with a total length of 0.7-1.0cm from the nursery pond to the summer flower fish species with a total length of 3-3.5cm) selected in inland freshwater areas. , there are large-scale farming limited by factors such as the region and the number of fish species, narrow breeding range, waste of precious fresh water resources, cannibalism leading to wound inflammation, prone to saprolegniasis, low survival rate of fish species cultivation (survival rate is only 50-70 %)And other issues

Method used

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Embodiment Construction

[0006] Implementation steps:

[0007] (1) Selection of ponds: Choose an earthen pond in the estuary area with a flat bottom and complete water inlet and drainage facilities; preferably an east-west rectangular earthen pond with a water level above 150cm, with an area of ​​5-20 mu.

[0008] (2) Disinfection and washing of ponds: According to the seedling release time, 75-100Kg / mu of quicklime or 20ppm bleaching powder water is used to disinfect the ponds in advance, and the drainage screen bag is installed before disinfection, and the water inlet is covered with double-layer 60 mesh Filter with sieve tulle bag, use 30-mesh gate at the outlet, and 20-mesh curved seine near the pool surface to prevent fry from escaping. After the pond is disinfected for 2 days, soak in water until the bottom of the pool is submerged, and drain thoroughly after soaking for 48 hours. stand-by.

[0009] (3) Water intake and fertilization: According to the seedling release time, the water intake sho...

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PUM

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Abstract

The invention relates to cultivation of freshwater fishes, in particular to a technique of rearing fry of the obscure puffer in low salinity sea water. The technique includes: selecting a pond; sterilizing the pond; cleaning the pond; injecting water and applying fertilizer; preparing for use of oxygenation facilities, and stocking the fry; managing rearing; spreading a net for exercise, distributing the fry to more ponds, and domesticating and feeding. The technique is characterized in that fry bags are allowed to float in the ponds before estuary soil ponds are selected and the fry are put in; pond water is then injected into the bags; the fry bags are shaken and stocked until interior salinity and water temperature of the fry bags and the pond water are moderate; fry stocking density is 8000-10000 / mu; the water indexes include 5-15%. of sea water salinity, 16-28 DEG C of natural water temperature, larger than 5mg / L of dissolved oxygen, 7.5-8.5 of pH, and 30-50cm of transparency; when growing to 2.8cm long, the fry are domesticated with artificial feed; when growing to 3cm long, the fry are distributed into the ponds; the net is spread for exercise 1-2 days before distribution; stocking density of summerlings in each pond is 1500-5000 / mu.

Description

technical field [0001] The invention relates to the artificial culture of freshwater fish in aquaculture, in particular to a technique for growing ponds of puffer puffer obscura in low-salinity seawater. Background technique [0002] Takifugu obscurus (Takifugu obscurus) belongs to Fuguformes, Fugu suborder, Fuguidae, and Fugu genus. It is mainly distributed in the Yellow Bohai Sea and the East China Sea in my country. It is a kind of anadromous migration and spawning fish. Groups of broodstock swim upstream into the river to lay eggs, and the juveniles are fattened in rivers or lakes connected to rivers, and return to the sea in the spring of the following year. Puffer obscurus mainly feeds on invertebrates such as crustaceans and shellfish and small fish in the natural environment. Pufferfish obscurus has plump meat, tender and delicious, rich in protein, but the fat content is the lowest among fishes. It is also rich in vitamins, minerals and a variety of trace elements t...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 陆根海张忠华施永海潘桂平朱建明王建军徐嘉波
Owner SHANGHAI FISHERIES RES INST
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