Method for domesticating wild Leptobotia elongata under artificial cultivation conditions until gonadal maturation of Leptobotia elongata

Abstract

The invention provides a method for d domesticating wild Leptobotia elongata under artificial cultivation conditions until the gonadal maturation of the Leptobotia elongata. The method includes: building an ecology-simulated pond to simulate the habitat of the wild Leptobotia elongata; subjecting the collected Leptobotia elongata to soaking and sterilizing, and performing isolated temporary cultivation; domesticating the Leptobotia elongata after the temporary cultivation in the ecology-simulated pond; feeding the Leptobotia elongata with prepared parent Leptobotia elongata feed; strengtheningbefore reproduction, to be more specific, three months before the reproduction of the Leptobotia elongata, injecting carp hypophysis cerebri grinding liquid once each month; two months before the reproduction, increasing the flow speed of the ecology-simulated pond, and increasing the water temperature to 25-26 DEG C to stimulate the gonadal maturation of the parent Leptobotia elongata. The method has the advantages that the habitat, water flow and food of the wild Leptobotia elongata are simulated, the nutrition proportion of the parent Leptobotia elongata feed is regulated, the strengthening before reproduction is performed, gonadal maturation rate can reach above 50%, and spawning induction rate during large-scale artificial reproduction is increased.

Description

technical field [0001] The invention relates to the field of gonad development of fish, in particular to a method for domesticating wild echinacea to gonad development maturity under artificial culture conditions. Background technique [0002] Long thin loach (Leptobotia elongata) belongs to Cyprinidae, Loachidae, Loach subfamily, and Leptobot genus. It is a unique fish in the middle and upper reaches of the Yangtze River in my country. The resources of the long-bodied loach have declined sharply. Currently, the long-bodied loach is listed as Vulnerable (VU) in the "Red List of Species in China" and "Red Data Book of Endangered Animals and Fishes in China". It is imminent to carry out protective artificial breeding on wild long thin loach. [0003] However, the artificial domestication mortality rate of the wild long thin loach is extremely high, and the wild parents almost all have different degrees of gonadal regression under the artificial domestication condition. It mak...

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Problems solved by technology

[0003] However, the artificial domestication mortality rate of the wild long thin loach is extremely high, and the wild parents almost all have different degrees of gonad degeneration under artificial domestication conditions

It makes it difficult for the collected wild long thin loach parents to reach the maturity of gonads under artificial breeding conditions

At present, although there are reports on the artificial breeding technology of long thin loach, they are basically isolated cases, and the technology of large-scale artificial breeding of long thin loach to mature gonads has not yet been broken through

This has become a technical bottleneck restricting the protective artificial breeding of the wild parents of the long thin loach

[0004] Comparative document 1: The application number is "CN201310590593.7", and the name is "a method for cultivating long thin loach seedlings". Through the careful cultivation of long thin loach seedlings, the seedlings with a size of 3 to 4 cm are cultivated, and the The seedlings with strong individuals and uniform specifications have improved the seedling survival rate of long thin loach and provided guarantee for the breeding benefits of long thin loach. However, this method aims to improve the survival rate of long thin loach seedlings and cultivate The demand for the supply of seedlings with strong individuals and uniform specifications cannot be obtained from the wild gonad-maturing gonads. At present, there is no large-scale artificial cultivation of gonad-maturing technology for gonads.

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