A kind of method of artificial induction of labor of oval pomfret

Abstract

The invention discloses an artificial spawning method for trachinotus ovatus. The method comprises the following steps that 101, a water bag is put into a net cage in a spawning area, and seawater is added into the water bag; 102, a to-be-spawned trachinotus ovatus parent fish is fished out and put into the water bag, the trachinotus ovatus parent fish struggles in the water bag, and change characteristics of the trachinotus ovatus parent fish in the water bag are observed; 103, according to the change characteristics of the trachinotus ovatus parent fish in the water bag in the step 102, one operator fishes the trachinotus ovatus parent fish out with a fishing bucket, the other operator clamps the position, close to a tail fin, of the parent fish caudal peduncle with the index finger and the middle finger of the left hand, and the parent fish is made to stand upside down in the fishing bucket and be closely attached to the right thigh of the operator; 104, the fish is grasped with the left hand, the right hand holds an injector to be aligned to the parent fish body, and injection is conducted on the muscle position of the caudal peduncle. According to the method, the phenomenon that a stress response occurs in the artificial spawning process of the trachinotus ovatus parent fish can be effectively reduced.

Description

technical field [0001] The invention relates to the field of breeding of ovoid pomfret, in particular to a method for reducing the stress response of ovate pomfret broodstock during artificial induction of labor. Background technique [0002] Oval pomfret (Prachinotus ovatus), commonly known as golden pomfret, yellow wax pomfret, belongs to Perciformes, Trevalidae. The egg-shaped pomfret has tender meat, delicious taste and high nutritional value. It is a valuable edible fish and is very popular in the market. At the same time, the oval pomfret has fast growth rate, strong disease resistance, high yield and good benefit, and is a very popular breeding species for farmers. Oval pomfret has the habit of migrating for food and must absorb oxygen through swimming. As one of the fastest swimming fish, when the fish leaves the water, its swinging and breaking away force is also higher than that of ordinary fish. [0003] At present, farmers will add anesthesia when artificially ...

AI Technical Summary

Problems solved by technology

[0003] At present, farmers will add anesthesia when artificially inducing broodstock to reduce stress and avoid injury. The method of inducing labor is to set up a water bag filled with seawater to fish in about 20 broodstock and add the anesthetic sesame oil cement for anesthesia and take it out Three people are placed on the console to induce spawning of pomfret broodstock. Since pomfret broodstock are fished into the water bag in batches, the fish body size and adaptability to anesthesia are also different. If the dosage is small, the fish will jump easily. When sex hormones are injected The needle is easy to pierce the fish multiple times, so three people must observe the anesthesia and bring the fish to the operating table, one person presses the fish head and tail and the other injects; although the dose is too large, it is easy to artificially induce labor, but it will cause Oval Pomfret was unable to swim for a short period of time and died due to hypoxia

[0004] It takes 4 to 5 years for artificially cultivated pomfret to reach sexual maturity, and the breeding time and nutritional cost are significantly higher than that of ordinary finished fish farming. Since the commonly used methods of artificial induction are likely to cause death and injury to broodstock, we are looking for a method that does not use anesthesia. It is especially important to effectively reduce the stress response of pomfret broodstock during artificial induction