Method for increasing hatching rate of transplantation in other areas of fertilized ova of protosalanx hyalocranius

Abstract

The invention discloses a method for increasing a hatching rate of transplantation in other areas of fertilized ova of protosalanx hyalocranius, which comprises the steps such as selection of ova transporting tools and supporting facilities, loading and transportation of the fertilized ova, management in transportation, temporary rearing and hatching, and releasing of the fertilized ova. Accordingly, the hatching rate of the transplantation in other areas of the fertilized ova of protosalanx hyalocranius is increased, and more protosalanx hyalocranius fries in water where the fertilized ova are to be transplanted and higher economic benefit are obtained.

Description

technical field [0001] The invention relates to a method for improving the hatching rate of fertilized eggs of big whitebait for off-site transplantation, and belongs to the field of fishery resource science. Background technique [0002] big whitebait ( Protosalanx hyalocranius Abbott) belongs to the genus Salangidae of the order Osmeriformes (Osmeriformes) Protosalanx Regan, 1908). Whitebait has fast growth, strong fecundity, high economic value, strong salt tolerance, low temperature, and strong adaptability and biological competitiveness in natural water bodies. Variety. The transplantation methods of big whitebait mainly include parent fish transplantation method, juvenile fish transplantation method and fertilized egg transplantation method. The method of fertilized egg transplantation is widely used because of its simple operation and low cost. This transplantation method is mainly to hatch the fertilized eggs indoors to the gastrula stage and then transport t...

AI Technical Summary

Problems solved by technology

However, it has been found in practice that this method of transplantation has the following disadvantages: fertilized eggs are prone to accumulation and hypoxia during long-distance transportation, resulting in a low hatching rate of fertilized eggs after transplantation; (When the temperature difference is less than 1°C), put the fertilized eggs directly into the transplanted waters, the adaptability of the fertilized eggs to the transplanted water body is poor, and the hatching rate of the fish eggs is low; after the fry bags are filled with water and inflated, they should not be stacked and take up a lot of space, so the number of eggs transported at a time is very limited