Fish electrical stimulation semen-collection or egg-collection method

Abstract

Provided is a fish electrical stimulation semen-collection or egg-collection method. When artificial spawning reaches the effect time, a probe of a semen-collection instrument or a probe of an egg-collection instrument is washed clean and then is inserted into the cloaca of a fish by 5-10 centimeters according to the size of the fish, the voltage of an instrument panel of the semen-collection instrument or the instrument panel of the egg-collection instrument is adjusted to be 5-10 volts, the current magnitude is 10-20 milliamperes, the cloaca of the fish is stimulated for 30 seconds, and then semen or eggs of the fish can be collected at the genital pore through a collection cup. The defects that in the prior art, only when a milter is killed, can semen be taken, the number of killed parent fishes is large, cost is high, operations waste time and labor, the efficiency is not high, the fertility rate of a fry is directly influenced due to the fact that the survival time of the semen obtained by killing the milter is short, after eggs are taken from female fishes in a squeezing mode, the parent fishes are severely injured and always die in a large scale, what is worse is that partial female fishes cannot be used as parent fishes next year, and the utilization rate of the parents fishes is greatly reduced are overcome.

Description

technical field [0001] The invention relates to the technical field of fish sperm collection or egg collection, in particular to a method for fish sperm collection or egg collection by electrical stimulation. Background technique [0002] There are two ways for fish to reproduce, one is natural reproduction and the other is artificial reproduction. The natural propagation technique is relatively simple, but the seedling emergence is small, and the seedling size is not neat. In order to obtain a large number of neat seedlings at one time, artificial propagation must be adopted. Artificial propagation is an important propagation method for aquatic seed production. However, artificial reproduction begins with obtaining sperm and eggs. Most fishes can be obtained by extrusion after artificial euthanasia, but some rare fish often cannot obtain or obtain a small amount of sperm by extrusion after oxytocin. In particular, fishes of the family Oleidae, such as yellow catfish, lo...

AI Technical Summary

Problems solved by technology

It avoids that in the prior art, only male fish can be killed to extract sperm, the consumption of broodstock is large, the cost is high, and the operation is time-consuming and laborious, the efficacy is not high, and the survival time of the sperm taken from male fish is short, which directly affects the fertilization of fry rate, the parental injury is more serious after the female fish is squeezed to retrieve eggs, a large number of deaths often occur, and even some female fish cannot be used as parents in the next year, and the utilization rate of the parents is greatly reduced.