Method for cultivating Protosalanx hyalocranius fingerlings

Abstract

The invention relates to a seedling cultivation method for protosalanx hyalocranius, belonging to the technical field of aquiculture, which is characterized in that: an artificial incubation is carried out for fertilized eggs of the protosalanx hyalocranius until a heartbeat stage, and then the fertilized eggs of the protosalanx hyalocranius are shifted to a culture container; the collecting volume of the fertilized eggs of the protosalanx hyalocranius ranges between 1800 and 2200 per liter; the water level of the culture container is kept between 18 and 22 cm; the water temperature in the culture container is controlled between 2 and 9 DEG centigrade; through a cultivation 50 to 60 days after the protosalanx hyalocranius come out from membranes, the length of the fingerlings of the protosalanx hyalocranius ranges between 1.5 and 2.2cm, and now the fingerlings of the protosalanx hyalocranius can be shifted to the natural lakes and the ponds for cultivation. Since natural food in combination with artificial diets is adopted to induce the larval fish for food intake, the technical bottleneck in inducing for food intake is solved, so as to provide necessary material conditions for the later artificial cultivations of the protosalanx hyalocranius; through shifting the fingerlings of the protosalanx hyalocranius, shortcomings of shifting protosalanx hyalocranius through the releaseof the fertilized eggs are overcome, so as to reduce natural losses of the fertilized eggs as a result of the incubation in the natural water and greatly improve the success rate for shifting the protosalanx hyalocranius.

Description

technical field [0001] The invention relates to a method for cultivating large whitebait fry, and in particular belongs to the technical field of aquaculture. Background technique [0002] Whitebait (Protosalanx hyaloeranius <abbott>), taxonomic status: Herringomorpha, Salmonidae, Anchovyidae, and Anchovy. [0003] Whitebait is a migratory fish in sea and freshwater in the Yangtze River, but it can also settle in fresh water in inland waters and form land-sealed populations. Whitebait has strong salt tolerance, suitable for low temperature, strong adaptability and strong biological competitiveness in natural waters. [0004] Whitebait is a high-quality fish with transparent body, no thorns, delicious meat and high protein content. It is very popular at home and abroad. The whitebait produced in natural water bodies is exported to foreign countries all the year round, especially in Southeast Asian countries and regions such as Japan and Hong Kong. In recent year...

AI Technical Summary

Problems solved by technology

It is precisely because the technical problems of seed cultivation have not been effectively solved that the artificial breeding of big whitebait has become a cooking without rice and water without a source due to the lack of seedlings. It has been stagnant for a long time

[0007] There are sporadic reports on pond culture of adult whitebait. Since the seedling cultivation technology of bigbait has not yet been broken through, artificial fertilized eggs are put into the pond directly. This breeding method cannot be accepted by farmers, mainly because farmers do not have the ability to Self-made fertilized eggs of large whitebait, and the hatching rate of fertilized eggs in the pond is too low, and the hatched fry also die because the bait of the big whitebait in the pond cannot be guaranteed, so it cannot be promoted