Method for all day feeding thamnaconus modestus early larvas by using shellfish early larvas

Abstract

The invention discloses a method for all day feeding thamnaconus modestus early larvas by using shellfish early larvas, comprising the following steps of: 1) after performing artificial insemination on the shellfishes, washing away redundant semens, and transferring the obtained shellfish fertilized ovum to the clean natural seawater, containing the fertilized ova in a storage case or a bucket of 20-50 liters, and then placing in a refrigerator or a fresh-preservation cabinet at 4 DEG C; and 2) feeding for times every day. The method in the invention is capable of preserving the fertilized ova of shellfishes such as oysters, scallops and the like at low temperature, reducing the development rate of the fertilized ova, and enabling the fertilized ova and the larvas to be in a development stage suitable for feeding the thamnaconus modestus larvas for a long time interval; and via the method of increasing the feeding times and shortening the feeding interval, the larvas in a young fishes breeding pond are capable of eating the shellfish larvas as much as possible; and the possibility of development of the shellfish larvas into D-shaped larvas is reduced so as to guarantee adequate nutrient supply for the thamnaconus modestus early larvas.

Description

technical field [0001] The invention relates to a method for cultivating fish, in particular to a method for feeding early larvae of the green-finned horse-faced puffer throughout the day with early shellfish larvae. Background technique [0002] Greenfin horse-faced fish Thamnaconus modestus The genus Tetraodontiformes of the order Tetraodontiformes, the family Monacanthidae of the single-horned fish, the genus of the horse-faced fish Thamnaconus , commonly known as elephant skin fish, bread fish, peeled fish, peeled wolf, etc., the English name is Drab filefish. The green-finned horse-faced fish belongs to the warm-temperature bottom fish in the open sea, and is distributed in the Bohai Sea, the Yellow Sea, the East China Sea, the Korean Peninsula and the Sea of ​​Japan in the northwest of the Pacific Ocean. From the 1960s to the 1980s, the catch of green-finned horse-faced fish was very high, and it became one of the main fishing targets in the East my country Sea in 1...

AI Technical Summary

Problems solved by technology

Therefore, the time limit for long oyster larvae as bait is only 24 hours. Not only can it not provide nutrition for more than 24 hours, but its hard shell will also damage the slender digestive tract of larvae, causing a large number of larvae to die, which leads to the failure of nursery production.

[0004] If shellfish larvae such as oysters and scallops cannot be ingested by larvae in time, they will continue to develop into postlarvae or adults, and use a shell to fix them on the wall of the fry cultivation pond, causing damage to the pond wall, affecting the subsequent use of the fry cultivation pond, and becoming harmful. fouling organisms