Artificial propagation technology for schizothorax grahami

Abstract

The invention provides an artificial propagation technology for schizothorax grahami, and belongs to the technical field of freshwater fish propagation. The artificial propagation technology comprises the steps of parent fish domestication, parent fish selection, spawning induction, artificial insemination, roe incubation and fry breeding, and the spawning induction adopts pentoxifylline, caffeine and calcium dobesilate as spawning induction assistants; meanwhile a compound feed used in the artificial propagation technology is further provided, the compound feed contains resistant starch which is prepared in an acid environment and has a substitution degree of 0.18-0.21. The artificial propagation technology is stable and controllable in process, low in production cost, high in parent fish domestication success rate, small in production damage, high in fertilization rate and hatching rate, low in fry malformation rate and high in drug utilization rate; and the compound feed has the advantages of excellent swelling degree and slow release property, high digestion conversion rate and high biological effective utilization rate, and can improve the gonad maturation and reproductive capacity of parent fish, improve the quality of seminal fluid and egg granules and reduce the embryonic development malformation rate.

Description

[0001] This application is a divisional application of the Chinese patent application 201910077579.4 entitled "Kunming Schizothorax artificial reproduction technology" submitted on January 28, 2019. technical field [0002] The invention belongs to the technical field of freshwater fish reproduction, and in particular relates to the artificial reproduction technology of Kunming Schizothorax. Background technique [0003] Kunming Schizothorax, also known as Schizothoracidae, belongs to Cyprinidae and Schizothorax subfamily in terms of classification. It is a unique plateau fish in my country. This fish is an omnivorous fish mainly feeding on plants. It has the characteristics of wide sex, tender meat and delicious taste, so it is of great significance to study and protect it. Kunming Schizothorax has the characteristics of strong disease resistance, high meat content, and rich muscle nutrients. Its meat is tender, delicious, high in protein, low in fat, and rich in various fat...

AI Technical Summary

Problems solved by technology

There are the following problems in the artificial breeding of sexually mature wild Schizothorax directly collected from natural rivers: 1. Due to reasons such as river pollution, water conservancy project construction, and overfishing of cruel fish, the amount of wild resources of this fish has decreased sharply, and the catch Animals tend to be younger, miniaturized and low-quality, and it is difficult to find sexually mature fish, which limits the source of research materials; 2. Wild Schizothorax collected from natural rivers is difficult to find sexually mature fish. It is even more difficult to find mature female fish and mature male fish; 3. Due to the limited fishing of wild sexually mature fish, the breeding fry are also limited, and the scale and quantity of breeding are also limited

[0006] Although the artificial reproduction technology of freshwater fish has a long history, it has not yet solved a series of problems that occur after wild fish enter the pond culture environment. The most important of these problems is reproductive dysfunction. It is difficult to observe the phenomenon of many rare fishes chasing each other in estrus and spawning naturally before spawning, so it is difficult for wild rare fishes to reproduce themselves in a pond culture environment