硝酸钠和氯化铵对蠕形康纤虫的毒性影响

doi:10.19640/j.cnki.jtau.2023.03.010

Journal of Tianjin Agricultural University ›› 2023, Vol. 30 ›› Issue (3): 53-58.doi: 10.19640/j.cnki.jtau.2023.03.010

• Researches and Scientific Notes • Previous Articles Next Articles

Toxic effect of ammonia and nitrogen on Cohnilembus verminus

Shi Xue, Lü Xianglin, Qi Hongli^{Corresponding Author}, Liu Jiale

Tianjin Key Laboratory of Aqua-Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300392, China

Received:2022-04-01 Online:2023-06-30 Published:2023-09-06

Abstract

Abstract: In order to explore the toxic effect of ammonia nitrogen stress on ciliates, this study adopted the acute toxicity test method of hydrostatic organisms, and measured the LC₅₀ value of Cohnilembus verminus under the stress of sodium nitrate and ammonium chloride. The results showed that the half lethal concentrations of sodium nitrate and ammonium chloride for 24 hours were 27.980 mg/L and 3 225.970 mg/L respectively, and the half lethal concentrations for 48 hours were 27.320 mg/L and 901.600 mg/L respectively. Low concentrations of sodium nitrate and ammonium chloride can promote the growth of C. Verminus. With the increase of drug concentration, the maximum population density and growth rate increased first and then decreased, while the generation time decreased first and then increased. In this experiment, it was found that C. Verminus had a high tolerance to ammonia and nitrogen. Therefore, in the actual high-density aquaculture, the pest of scuticociliatosis should be paid more attention.

Key words: sodium nitrate, ammonium chloride, Cohnilembus verminus, toxicity effect, population growth

CLC Number:

S943

Shi Xue, Lü Xianglin, Qi Hongli, Liu Jiale. Toxic effect of ammonia and nitrogen on Cohnilembus verminus[J]. Journal of Tianjin Agricultural University, 2023, 30(3): 53-58.

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Toxic effect of ammonia and nitrogen on Cohnilembus verminus

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