Cultivation method for novel ammonia-nitrogen resistant variety of giant tiger shrimps

Abstract

The invention discloses a cultivation method for a novel ammonia-nitrogen resistant variety of giant tiger shrimps. The method comprises the following steps: the ammonia-nitrogen concentration of culture water is divided into a plurality of gradient ranges, and medians of the ammonia-nitrogen concentration in each gradient range sequentially are from a first adjustment range to a number N adjustment range in a low-to-high sequence; from the first adjustment range to the number N adjustment range, lower limit values gradually increase, and upper and lower limit value difference values of each adjustment range from the first adjustment range to the number N adjustment range gradually increases; a plurality of the giant tiger shrimps are thrown into a culture pond, and then cultivation is performed at time periods corresponding to the adjustment ranges from the first adjustment range to the number N adjustment range according to gradient ranges; the ammonia-nitrogen concentration of the culture water within a number a time period is adjusted for culture according to the following manner: the ammonia-nitrogen concentration of the culture water is gradually increased from the lower limit value of a number a adjustment range to the upper limit value of the number a adjustment range, and then the ammonia-nitrogen concentration of the culture water is gradually reduced from the upper limit value of the number a adjustment range to the lower limit value of a number (a+1) adjustment range.

Description

technical field [0001] The invention relates to a technique for cultivating a new species of Penaeus monodon, in particular to a method for cultivating a new species of Penaeus monodon resistant to ammonia nitrogen. Background technique [0002] Penaeus monodon is eurysalinity, can tolerate high temperature and low oxygen, and has weak adaptability to low temperature. Strong disease resistance. The individual is large, the shell is thicker, and the edible ratio is lower than that of Chinese prawns. The meat is delicious and nutritious. The body shell is relatively solid and can withstand being caught by hand. After leaving the water, it has a strong endurance to dry and expose to the air, so it can be sold as a live shrimp. Coastal and estuary beaches that are suitable for the living habits of P. monodon can be used to build ponds to raise shrimp. The water source should be pure and free from industrial pollution. The range of temperature, specific gravity, and pH value s...

AI Technical Summary

Problems solved by technology

Existing studies have shown that ammonia nitrogen has obvious toxic effects on the larvae of Penaeus monodon, and the high concentration of ammonia nitrogen in the water environment often leads to the blockage of ammonia excretion in the gill tissue of Penaeus monodon and the increase of oxygen consumption, hemolymph protein and blood levels. A series of physiological responses to ammonia poisoning, such as a significant decrease in the concentration of cyanocyanin, a significant decrease in immune activity and disease resistance to WSSV, and the blood ammonia content increased with the prolongation of the ammonia nitrogen challenge time and caused explosive death

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