A method for improving the survival rate of the parent anchovy during artificial breeding

Abstract

The invention provides a method for improving the survival rate of coilia ectenes parents during an artificial breeding period. The method is characterized by comprising the following steps of adopting artificially-bred offspring coilia ectenes adult fish which is more than two years old as reserve parents of artificial breeding; in the cultivating process of the reserve parents, pulling a net and turning over a tank for 2-3 times; before the artificial breeding, pulling the net of the reserve parents and training for 2-3 times; selecting the coilia ectenes adult fish with a completely-developed gonad as parents; conveying the selected parents by using a light-shielding dark bucket; slightly operating with water and naturally fertilizing, wherein the dosage of an oxytocic hormone is not more than 30 micrograms per kilogram and the normal saline amount per fish is not more than 0.5ml, a hasten parturition tank is circular or square; shielding and regulating; continuously micro-inflating; after the parents lay eggs, carrying out postpartum intensified cultivation; gradually adding seawater to adjust the salinity to 5-10, wherein the released density is 20-40 per tank; continuously inflating and controlling the water temperature to 22-25 DEG C; feeding opossum shrimps and palaemon carinicauda for two times per day; determining the feeding amount of the next time according to the food ration; and sucking the bottom for one time per day to remove dead fish and shrimps in time.

Description

technical field [0001] The invention relates to aquaculture, in particular to a method for improving the survival rate of parents during the artificial breeding of silver anchovy. Background technique [0002] Swordfish ( Coilia nasus Schlegel), also known as long-jawed anchovy, commonly known as saury, hair saury, is a river-sea migratory fish, mainly distributed in the Yellow Sea and the East China Sea in my country, and distributed in all rivers leading to the sea, with the highest production in the lower reaches of the Yangtze River. Anchovy from the Yangtze River is famous for its tender meat, fresh and fat, and strong seasonality. It is also known as the "three delicacies of the Yangtze River" together with shad and puffer fish in the Yangtze River. The resources of anchovy in the Yangtze River are extremely rich in history. In recent years, due to the influence of many factors such as overfishing and the deterioration of the ecological environment, the resources of ...

AI Technical Summary

Problems solved by technology

At present, the research on the reproductive technology of the anchovy is still in its infancy. In recent years, many scientific research institutes in China have set up projects to carry out research on this related technology. In 2011, the base adopted the artificially cultivated parent Anchovy first to achieve the success of intensive indoor artificial breeding. However, due to the irritable temper of the Anchovy, improper artificial breeding operations, and poor postpartum cultivation, the parent of the Anchovy survived after artificial breeding. The rate is extremely low, and it also leads to the problems of low fertilization rate of eggs obtained by artificial breeding and poor quality of newly hatched larvae. Therefore, improving the survival rate of the parents of swordfish during artificial breeding is a key technology for artificial breeding of swordfish.