Preliminary observations of cadmium and copper effects on juveniles of the polychaete Capitella sp. Y (Annelida: Polychaeta) from Estero del Yugo, Mazatlán, México
The effects of cadmium (Cd) and copper (Cu) on cultured juveniles of Capitella sp. Y were investigated. Seven-day old juveniles were exposed to 13 (control), 60, 160, 240 and 340 μ g Cd L -1 and 17 (control), 50, 120 and 150 μ g Cu L -1 for 30 days. Mortality significantly increased with increasing...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:369944276009 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=369944276009 |
| Access Level: | acceso abierto |
| Palabra clave: | Biología Bioassays mortality juveniles marine worms heavy metals |
| Sumario: | The effects of cadmium (Cd) and copper (Cu) on cultured juveniles of Capitella sp. Y were investigated. Seven-day old juveniles were exposed to 13 (control), 60, 160, 240 and 340 μ g Cd L -1 and 17 (control), 50, 120 and 150 μ g Cu L -1 for 30 days. Mortality significantly increased with increasing Cu concentrations, but in Cd exposures, it was only evident at 340 μ g L -1 . Body size and faecal pellet production were reduced earlier in juveniles exposed to Cu than those exposed to Cd, especially in the higher Cu concentrations. These facts indicate that juveniles are more sensitive to Cu in terms of mortality, feeding and growth. Haemoglobin production was inhibited due to the scarcity of food in the experimental sediment rather than to metal exposure. Tube building was not affected by the presence of metals or by the scarcity of food. This study suggests that Cu concentrations from 50 to 150 μ g L -1 and 340 μ g L -1 of Cd could affect the population dynamics of this species in natural ecosystems. |
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