Large-scale and efficient breeding method for odontobutis potamophila based on timely temperature control

Abstract

The invention relates to a large-scale breeding method for odontobutis potamophila based on timely temperature control. The method specifically includes the following steps that (1), parent fishes arebred before production, wherein waterweeds are transplanted in a parent fish culture pool, palaemonetes sinensis is put in the pool, and meanwhile odontobutis potamophila parents are added accordingto the ratio of males to females; (2), an environment is created, wherein fresh snails are put in to improve the water quality; (3), an artificial laying nest is arranged, wherein two arc green tilesare bundled relatively to form the tubular artificial laying nest; (4), artificial spawning is performed, wherein when it is found that eggs are attached onto the artificial laying nest, water in thepool is drained through pumping, the odontobutis potamophila parents are caught, a spawning pool is built, and oxytocins are injected into the odontobutis potamophila parents; (5), timely temperaturecontrol is performed for incubation, wherein when growing to the neurulation stage, embryos are timely transferred into a room for temperature-controlled incubation. The method reduces the adverse effect of environmental stress on embryo development at the early stage of incubation of fertilized eggs; compared with temperature-controlled incubation conducted in the whole process, the energy can besaved by 73%, the deformity rate is reduced by 8%, the incubation rate of the fertilized eggs is improved by 11%, and the incubation period in the method can be shortened by 5-7 days compared with the normal-temperature incubation period.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a method for propagating the river snakehead, in particular to a large-scale and high-efficiency propagation method for the river snakehead based on timely temperature control. Background technique [0002] River sand pond snakehead ( Odontobutis potamophila Günther ), belonging to the order Perciformes, Channaidae, and Channa genus, commonly known as "tiger shark", "nerd fish", and "earth fish", distributed in the middle and lower reaches of the Yangtze River and its tributaries, the Qiantang River system and the Minjiang River in China Water system, etc., are endemic to China. It is popular because of its delicious meat, high nutritional value and medicinal value, especially after it was hailed as "the first dish of the World Expo" in the 2010 Shanghai World Expo, it became even more famous, and its price continued to rise. , Hangzhou area up to 150 ~ 200 yuan / kg. [000...

AI Technical Summary

Problems solved by technology

At this stage, the difficulties and main problems in the large-scale reproduction of the river sand pond snakehead are as follows: 1. The natural spawning time is too scattered, and the efficiency of completely imitating ecological reproduction is low

2. The hatching time of fertilized eggs is too long, and the hatching rate is low without broodstock egg protection

If the fertilized eggs are hatched in running water under full temperature control, although the incubation period can be shortened and the occurrence of saprolegniasis can be reduced, but the whole process of temperature control consumes a lot of energy and costs high, and because the embryonic development of the river sand pond snakehead is relatively sensitive to the environment, it is prone to embryo development Deformation, low hatching rate and other problems