Coreius heterodon fry collection, holding culture and long-distance transportation method

Abstract

The invention publishes a coreius heterodon fry collection, holding culture and long-distance transportation method. The method comprises the following steps of: selectively performing bottoming and downstream fishing in a water area of relatively concentrated coreius heterodon juvenile fishes with water depth of 10 m to 20 m, slow water flow and a back water area by using a small-sized fish bottom trawl during 10-11 months after water temperature is lower than 25 DEG C; screening out coreius heterodon fries with complete body surfaces and better activity from catches, performing body surfacedisinfection and then transferring into a live fish carrier cabin to perform holding culture for 2 days, wherein the flow rate of a holding culture water area is 0.5 m / s to 0.8 m / s, the water level is kept at 50 cm to 70 cm, and the water temperature does not exceed 25 DEG C; and after the holding culture is finished, filling the coreius heterodon fries into a fish fry bag with water, meanwhile, placing ice blocks, filling oxygen according to a water-air volume ratio of 1 to 1 and then sealing the neck of the bag, and filling in a foam box with a cover to transport away from sunshine, whereinthe entire carriage is controlled within 8 hours. The method is suitable for long-distance transportation of coreius heterodon fries; secondary aeration is not required halfway; and the survival rateis high.

Description

technical field [0001] The invention relates to a method for collecting, temporarily raising and long-distance transportation of copper fish fry. Background technique [0002] The distribution area of ​​adult copperfish in the Yangtze River starts from the Nantong River section of Jiangsu Province in the east to the Panzhihua River section of Sichuan Province in the west. Generally speaking, the distribution area is very wide, but the individual specifications of each river section vary greatly. From Nantong, Jiangsu Province to Jingzhou River, Hubei Province, the individual size of copper fish is small, and the body weight is within the range of 100-600g, and the 100-300g is the main group, and the individuals of 500-600g are rare. From Chongqing to Panzhihua, the size gradually increases, and occasionally 500-1200g adults can be seen. The breeding population is mainly concentrated in the section of the river above Chongqing, and the existing survey data show that its spaw...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the current difficulties in the collection and transportation of copper fish fry, overcome the shortcomings of the prior art, and provide a method that can collect copper fish fry of suitable specifications and transport them in batches over long distances under the premise of ensuring the survival rate