Repositorio Atenea de la Facultad de Ciencias, UNAM >
Repositorio Ciencias >
FACULTAD DE CIENCIAS >
Biología >
Departamento de Ecología y Recursos Naturales >
Departamento de Ecología y Recursos Naturales >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/11154/2675
|
Title: | acute toxicity of ammonia and nitrite to white shrimp penaeus setiferus postlarvae |
Authors: | Chiappa-Carrara, X Espinoza, V Vanegas, C Alcaraz, G |
Issue Date: | 1999 |
Abstract: | Penaeus setiferus postlarvae were exposed to acute levels of ammonia, nitrite, and to a mixture of both by a short-term static method. The 24-h, 48-h and 72-h LC50 values for un-ionized ammonia were 1.49, 1.21 and 1.12 mg/L NH3-N (un-ionized ammonia as nitrogen), and 11.55, 9.38 and 8.69 mg/L ammonia-N (un-ionized plus ionized ammonia as nitrogen). The 24-h, 48-h and 72-h LC50 values for nitrite were 268.06, 248.84 and 167.33 mg/L nitrite-N (nitrite as nitrogen). Nitrite was much less toxic than ammonia. The joint effect of ammonia and nitrite on the postlarvae was synergistic at 48-h exposure and antagonistic after 72 h. Postlarvae of P. setiferus may be considered as organisms sensitive to ammonia and nitrite. |
URI: | http://hdl.handle.net/11154/2675 |
ISSN: | 0893-8849 |
Appears in Collections: | Departamento de Ecología y Recursos Naturales
|
Files in This Item:
There are no files associated with this item.
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|