Takifugu obscurus fry breading method through application of small fertilized eggs

Abstract

Disclosed is a Takifugu obscurus fry breading method through the application of small fertilized eggs. The Takifugu obscurus fry breading method through the application of the small fertilized eggs is composed of steps of hatching of fertilized egg, fry putting, inflation, temperature control, water quality control, pond dividing and bait feeding and is characterized in that the small fertilized eggs are put in a hatching pond with a conical bottom, wherein the density of the small fertilized eggs is 80000-100000 entities per cubic meter; the hatching pond is inflated in a still water mode, the water temperature is 21-22 DEG C, the illumination is 800-1000x and water is changed one time each day; newly-hatched fry are moved to a fry breeding pond after being temporarily bred in the hatching pond for two days, the density of the put fry is 10000 entities per cubic meter, and bottom suction, pollution discharge and water changing are performed on the fourth day, pond dividing is performed one time when the newly-hatched fry are bred for 18 and 25 days respectively; initial bait and SS type freshwater rotifers are fed when the fry are bred for 2-4 days, small freshwater rotifers are fed when the fry are bred for 5-7 days, middle-sized freshwater rotifers are fed when the fry are bred for 8-11 days, and the sizes of the fed creature bait increases as the fry grow; when the total length of the fry is 0.9-1.8 cm, the fry are moved to a pond from the breeding pond.

Description

technical field [0001] The invention relates to aquaculture, in particular to the technology of using small fertilized eggs of puffer puffer to raise seedlings. Background technique [0002] Fugu obscurus ( Takifugu obscurus ) is an important fishery resource in the Yangtze River waters of my country, and has high nutritional and medicinal value. Its muscles are as white as frost, the meat tastes plump, tender and delicious, rich in protein and rich in nutrition, and is known as the first of the "three delicacies of the Yangtze River". Our country has had the traditional habit of eating puffer fish since ancient times. Puffer fish has always been regarded as a treasure on the table, and the liver and ovary of puffer fish can extract tetrodotoxin, which can be used to treat neuralgia, spasm, nocturia, etc. Therefore, Puffer obscurus has high economic value and medicinal value. Puffer obscurus is the main species of puffer fish cultured in my country. Its breeding output is...

AI Technical Summary

Problems solved by technology

[0003] At present, the conventional artificial propagation and seed cultivation technology of puffer obscura is relatively mature, and the survival rate is relatively high. However, during the process of induced spawning and spawning and fertilization of puffer obscurus artificially, some relatively small individuals often appear. Fertilized eggs, the egg diameter of small eggs is 0.95-1.05mm, the egg diameter of normal eggs is >1.05mm, and the individuals of newly hatched fish after hatching from small fertilized eggs are relatively small, and the total length of newly hatched fish from small fertilized eggs is 2.60-2.70mm mm (full length of normal newly hatched larvae > 2.75mm), which poses a certain difficulty in seed cultivation, and the use of conventional seed cultivation techniques will result in a very low survival rate of seed cultivation, so the small fertilized eggs of puffer puffer obscura A set of special breeding techniques is required to cultivate the hatched larvae into 1cm-long black larvae.