Physiological changes in the hemolymph of juvenile shrimp Litopenaeus vannamei to sublethal nitrite and nitrate stress in low-salinity waters.

Autor: Valencia-Castañeda G; Posgrado en Ciencias del Mar y Limnología, ICML-UNAM, Unidad Académica Mazatlán, Sinaloa, Mexico., Frías-Espericueta MG; Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Mexico., Vanegas-Pérez RC; Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico., Chávez-Sánchez MC; Centro de Investigación en Alimentación y Desarrollo, A.C. Unidad Mazatlán, Mexico., Páez-Osuna F; Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Unidad Académica Mazatlán, Mexico; Miembro de El Colegio de Sinaloa, Sinaloa, Mexico. Electronic address: paezos@ola.icmyl.unam.mx.
Jazyk: angličtina
Zdroj: Environmental toxicology and pharmacology [Environ Toxicol Pharmacol] 2020 Nov; Vol. 80, pp. 103472. Date of Electronic Publication: 2020 Aug 18.
DOI: 10.1016/j.etap.2020.103472
Abstrakt: Juveniles of the shrimp Litopenaeus vannamei (3.3 ± 0.4 g) were exposed separately to nitrite (0.0, 1.1, 2.6, and 5.3 mg/L nitrogen as nitrite [NO 2 - -N]) and nitrate (0, 90, 225 and 400 mg/L nitrogen as nitrate [NO 3 - -N]) concentrations equivalent to 0, 10, 25, and 50% of the LC 50 -96 h value of NO 2 - -N and NO 3 - -N in low salinity water (3 g/L). Shrimps responded to nitrite and nitrate according to changes in oxyhemocyanin, glucose, lactate and ion levels in the hemolymph after 6, 12, 24, and 48 h of exposure. Oxyhemocyanin levels decreased with increasing nitrite and nitrate levels and were higher at 50% exposure to the contaminants. Compared to the control, glucose and lactate increased significantly at 50% exposure to nitrite and nitrate, particularly at 12 and 24 h. Na + in the hemolymph changed with nitrite and nitrate, while K + only changed ˜with nitrite.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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