亚硝态氮对虾肝肠胞虫感染脊尾白虾的影响

doi:10.16378/j.cnki.1003-1111.20216

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Abstract Nitrite nitrogen is one of the important factors to induce the outbreak disease of shrimp. In order to investigate the effects of nitrite stress on the growth status and the carrying capacity of parasite Enterocytozoon hepatopenaei in ridgetail white prawn Exopalaemon carinicauda, five experimental groups with different nitrite nitrogen concentrations (0.008, 3.000, 6.000, 9.000 and 12.000 mg/L) were set up to determine the changes in growth indices and EHP load of ridgetail white prawn in three weeks. The results showed that the survival rate, body length and body weight gain rate of ridgetail white prawn were increased first and then decreased with the increase in nitrite nitrogen concentration. The maximum value was reached in nitrite nitrogen 6.000 mg/L group. The increment of average survival rate, body length and body weight gain rate were 29%, 0.8 cm and 35.33%, respectively. With the increase in nitrite nitrogen concentration, the EHP load of ridgetail white prawn was decreased first and then increased, and reached the lowest value in 6.000 mg/L group, which was 4.4×10³ copies/mg. It was found that 6.000 mg/L nitrite nitrogen led to inhibit the transmission of EHP and to promote the growth of ridgetail white prawn. The purpose of this study is to explore the effect of nitrite nitrogen on the transmission rate of EHP, and help to control the concentration of nitrite reasonably in order to inhibit the spread of EHP, so as to improve the survival rate and breeding yield of ridgetail white prawn infected with Enterocytozoon hepatopenaei.

Key words： Exopalaemon carinicauda Enterocytozoon hepatopenaei nitrite nitrogen growth status capacity

Received: 30 September 2020

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	Articles by authors
	HU Jihui
	DUAN Jiancheng
	GAO Yang
	CHEN Shuhan
	ZHANG Qingqi
	MU Hua
	LAI Xiaofang
	GAO Huan

Cite this article:

HU Jihui,DUAN Jiancheng,GAO Yang, et al. Effect of Nitrite Nitrogen on Infection of Parasite Enterocytozoon hepatopenaei in Ridgetail White Prawn Exopalaemon carinicauda[J]. Fisheries Science, 2022, 41(4): 664-669.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.20216 OR https://www.shchkx.com/EN/Y2022/V41/I4/664

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