Caloric content of Daphnia magna as reflect of propanil stress during a short-term exposure and its relationship to long-term responses.
Environ Toxicol Pharmacol
; 35(3): 465-72, 2013 May.
Article
en En
| MEDLINE
| ID: mdl-23501607
ABSTRACT
The present study investigates energy stores changes in the aquatic invertebrate Daphnia magna following a 5-d exposure to propanil. Juveniles of D. magna were exposed to sublethal propanil concentrations (0.07, 0.10, 0.21 and 0.55 mgl(-1)) which were used previously to test their effect on reproduction, growth and survival (21 days test) of D. magna. Glycogen, total lipids, proteins, and dry weight were determined in control and exposed daphnids at 24, 48, 72, 96 and 120 h. Data were used to calculate caloric content as biomarker of propanil exposure. Results showed a depletion of energy reserves in D. magna exposed to the herbicide. At 120 h of exposure to the highest propanil concentration (0.5 mgl(-1)), the reduction in daphnid reserves were glycogen (28%), proteins (28%) and lipids (31%), and caloric content was reduced in 27%. On the other hand, we found a positive correlation between caloric content and the chronic parameters intrinsic rate of natural increase and offspring per female when daphnids were exposed for 120 h to the herbicide.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Propanil
/
Contaminantes Químicos del Agua
/
Daphnia
/
Herbicidas
Límite:
Animals
Idioma:
En
Revista:
Environ Toxicol Pharmacol
Año:
2013
Tipo del documento:
Article
País de afiliación:
España