Valencia-Castañeda Gladys, Frías-Espericueta Martin G, Vanegas-Pérez Ruth C, Pérez-Ramírez Jesús A, Chávez-Sánchez María C, Páez-Osuna Federico
Posgrado en Ciencias del Mar y Limnología, ICML-UNAM, Unidad Académica Mazatlán, Joel Montes Camarena s/n, 82040, Mazatlán, Sinaloa, Mexico.
Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen s/n, 82000, Mazatlán, Sinaloa, Mexico.
Bull Environ Contam Toxicol. 2018 Aug;101(2):229-234. doi: 10.1007/s00128-018-2355-z. Epub 2018 May 12.
Shrimp farming in low salinities waters is an alternative to increasing production, and counteracting disease problems in brackish and marine waters. However, in low-salinity waters, toxicity of nitrogen compounds increases, and there is no available data of its acute toxicity in shrimp postlarvae. This study determined the acute toxicity of ammonia, nitrite and nitrate in Litopenaeus vannamei postlarvae in 1 and 3 g/L salinity, as well as the safety levels. The LC confirms that nitrite is more toxic than ammonia and nitrate in low salinity waters, and that its toxicity increases with a decrease in salinity. The safe levels estimated for salinities of 1 and 3 g/L were 0.54 and 0.81 mg/L for total ammonia-N, 0.17 and 0.25 mg/L for NO-N, and 5.6 and 21.5 mg/L for NO-N, respectively.
在低盐度水域进行对虾养殖是增加产量以及应对咸淡水和海水养殖中疾病问题的一种替代方法。然而，在低盐度水域中，含氮化合物的毒性会增加，并且目前尚无关于其对虾幼体急性毒性的可用数据。本研究测定了盐度为1克/升和3克/升时凡纳滨对虾幼体中氨、亚硝酸盐和硝酸盐的急性毒性以及安全水平。LC证实，在低盐度水域中亚硝酸盐比氨和硝酸盐毒性更大，并且其毒性随盐度降低而增加。对于盐度为1克/升和3克/升时估算的安全水平，总氨氮分别为0.54毫克/升和0.81毫克/升，亚硝酸盐氮为0.17毫克/升和0.25毫克/升，硝酸盐氮为5.6毫克/升和21.5毫克/升。
