Method for increasing pelteobagrus fulvidraco fry breeding survival rate

Abstract

The invention relates to a method for increasing pelteobagrus fulvidraco fry breeding survival rate and a preparation method thereof. The preparation method comprises the following steps: (1) designing a fry breeding pond, (2) designing a bait breeding pond, (3) seeding, absorbing excessive nutrients and fixing the bottom of the fry breeding pond and the bait breeding pond, (4) fertilizing and water culture, (5) throwing fries, (6) controlling diseases and insect pests, (7) supplementing biological baits, (8) feeding feeds and (9) regularly regulating water. The net frame is erected on the periphery of the fry breeding pond, the aeration stones are arranged on the net frame, attachments are provided for fries which just go down to the pond and cannot swim horizontally, and the fries are prevented from sinking into the water bottom and being killed by oxygen deficit.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a method for improving the survival rate of peltrow catfish seed cultivation. Background technique [0002] With the development of the yellow catfish industry, the breeding species are constantly changing, from the original common yellow catfish to all male yellow catfish, and then to the hybrid yellow catfish that has become popular in recent years. The rapid development of the industry shows that the industry is developing vigorously and has become another huge industry besides the "four major fish", snakehead, perch, and mandarin fish. More than 1 million catties. However, there has been no breakthrough in the breeding technology of peltrigid catfish fry. Under general pond conditions, the average survival rate of water flower to summer flower fish fingerlings is less than 30%. There are three reasons for this. First, the key to affecting the survival rate of summer flower...

AI Technical Summary

Problems solved by technology

However, there has been no breakthrough in the breeding technology of peltrigid catfish fry. Under general pond conditions, the average survival rate of water flower to summer flower fish fingerlings is less than 30%. There are three reasons for this. First, the key to affecting the survival rate of summer flower cultivation is The two stages of food transition for fry from absorbing yolk sac to feeding on zooplankton, and from eating zooplankton to eating artificial compound feed. If the bait supply is insufficient or unpalatable during the feeding period, the survival rate will be affected; With the change of time, the most palatable rotifers are gradually replaced by larger cladocerans, copepods and protozoa. If the timing of feeding is wrong, not only is it not suitable for fish fry to feed, but it is easy to cause water shortage after mass reproduction. Oxygen harms fry; thirdly, yellow catfish fry are very susceptible to parasitic diseases, such as trichomonas, oblique tube worms, small melon worms, etc. If insects are not killed in time during the cultivation period, it is very easy to cause the death of fry

Another example is the authorized invention patent CN103688887A. Although this patent has refined the fish fry cultivation technology, it still lacks specific technical measures in terms of protection measures for fish fry, bait conversion, and later stage fertilizer and water in the early stage of the pond. Rice is an emergent plant, and only the rhizome submerged in the water body can provide a habitat for the fry, and the space is very limited, which is not conducive to the attachment and habitat of the fry

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