Method for marking thickness of tilapia mossambica indoor canvas pool

Abstract

The invention provides a tilapia indoor canvas pond thickening method, and belongs to the technical field of fry thickening, and the tilapia indoor canvas pond thickening method comprises the following steps: S1, preparation before pond putting: disinfecting fry thickening equipment and supplementing water; s2, fry putting, wherein fry are soaked in salt water and then fished out, and the fry are lightly poured to different corners of fry thickening equipment; s3, daily management: (1) mixing anti-infection drugs with water, and uniformly splashing the anti-infection drugs to the whole pool; (2) daily feeding; (3) daily monitoring; (4) disinfecting once every two weeks; (5) changing 1 / 4-1 / 2 of water every day; (6) timely opening an oxygen increasing machine for oxygen increasing; (7) fishing out dead fishes in time; s4, catching: (1) not feeding 2 days before catching; circulating boiled water, and slowly changing water in part or the whole pool; (2) the fish fries are watered; anti-infection drugs are adopted, wounds of injured fries are prevented from being infected, whether parasites exist or not is observed through regular microscopic examination, treatment is conducted in time, and therefore the morbidity rate of the fries is reduced, the fry breeding time is shortened, and the fry mortality rate is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of fish fry marking, in particular to a tilapia indoor canvas pond marking method. Background technique [0002] The standard thickness of fry refers to the process between the growth of fry from the yolk seedlings that have just hatched to the inch seedlings. The standard thickness of fry is an important stage in the nursery process and the stage with the most serious losses. Because fish fry have high requirements on water quality and are very delicate, they have relatively picky requirements in terms of opening bait; so once the operation is wrong, the overall survival rate of fish fry will be greatly reduced. [0003] Existing freshwater fry marking is generally carried out in the pond, and the water can be exchanged with the water in the pond at any time through the purse seine to ensure the same water quality inside and outside the purse seine, so the fish fry are successfully placed in the pond less ...

AI Technical Summary

Problems solved by technology

However, there are obvious disadvantages in this method of marking roughness: 1. Because the water quality in the pond is easily affected by factors such as external pollution and weather changes, the water quality fluctuates violently, which in turn affects the survival rate of fish fry marking thick; 2. Due to the large water body in the pond Constant temperature operation cannot be carried out, and fry standardization cannot be carried out against the season, which seriously affects the economic benefits of the farm; 3. Due to long-term breeding, there will be a large amount of organic matter accumulation in the pond, and these organic matters are prone to produce harmful chemical substances (such as ammonia nitrogen, nitrite, etc.) , hydrogen sulfide, etc.), are also easy to breed various pathogenic viruses, bacteria and other microorganisms; these chemical substances and microorganisms are easy to make the newly hatched fry splash sick or die, reducing the overall survival rate of the fry splash; 4. Some are particularly delicate 5. In the early stage of fry water splashes, farmers generally put in live plankton such as freshly hatched artemia and rotifers as bait for fry openings.

However, because it is difficult to accurately grasp the amount of feeding, in order to ensure the normal growth of fry, farmers often overfeed

Overfed open bait will settle at the bottom of the marked area, and then die and rot; resulting in a large number of harmful microorganisms in the marked area

These harmful microorganisms can easily infect the fry with viruses, bacteria, etc., resulting in illness or death of the fry

In the case of seine netting in ponds or cement ponds, because the area of ​​the seine net or cement pond is large, the dead and corrupted open bait at the bottom of the marked area is difficult to be cleaned and discharged in time, and the fish fry get sick Or the death situation will be more serious, resulting in a low survival rate of fry

Images