BECAS
BASSO Agustin
artículos
Título:
Toxicity of the fungicide trifloxystrobin on tadpoles and its effect on fish-tadpole interaction
Autor/es:
JUNGES, C. M., PELTZER P. M., LAJMANOVICH R. C., ATTADEMO A. M. & BASSÓ A. 2012
Revista:
CHEMOSPHERE
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2012
ISSN:
0045-6535
Resumen:
Contamination of aquatic systems is a major environmental stress that can interfere with predatorprey
interactions, altering prey or predator behavior differentially. We determined toxicity parameters of the
fungicide trifloxystrobin (TFS) and examined its effects on predation rate, using a fish predator (Synbranchus
marmoratus) and four anuran tadpole species as prey (Rhinella arenarum, Physalaemus santafecinus,Synbranchus
marmoratus) and four anuran tadpole species as prey (Rhinella arenarum, Physalaemus santafecinus,) and four anuran tadpole species as prey (Rhinella arenarum, Physalaemus santafecinus,
Leptodactylus latrans, and Elachistocleis bicolor). TFS was not equally toxic to the four tadpole species, E.
bicolor being the most sensitive species, followed by P. santafecinus, R. arenarum, and L. latrans. Predation
rates were evaluated using different treatments that combined predator and prey exposed or not to this
fungicide. TFS would alter the outcome of eeltadpole interaction by reducing prey movements; thus,
prey detection would decrease and therefore tadpole survival would increase. In addition, eels preyed
selectively upon non-exposed tadpoles avoiding the exposed ones almost all throughout the period evaluated.
Predation rate differed among prey species; such differences were not due to TFS exposure, but to
interspecific differences in behavior. The mechanism that would explain TFS-induced reduction in predation
rates remains unclear; however, what is clear is that sublethal TFS concentrations have the potential
to alter prey behavior, thereby indirectly altering predatorprey interactions. In addition, we consider
that predatorprey relationships are measurable responses of toxicant exposure and provide ecological
insight into how contaminants modify predatorprey interactions., and Elachistocleis bicolor). TFS was not equally toxic to the four tadpole species, E.
bicolor being the most sensitive species, followed by P. santafecinus, R. arenarum, and L. latrans. Predation
rates were evaluated using different treatments that combined predator and prey exposed or not to this
fungicide. TFS would alter the outcome of eeltadpole interaction by reducing prey movements; thus,
prey detection would decrease and therefore tadpole survival would increase. In addition, eels preyed
selectively upon non-exposed tadpoles avoiding the exposed ones almost all throughout the period evaluated.
Predation rate differed among prey species; such differences were not due to TFS exposure, but to
interspecific differences in behavior. The mechanism that would explain TFS-induced reduction in predation
rates remains unclear; however, what is clear is that sublethal TFS concentrations have the potential
to alter prey behavior, thereby indirectly altering predatorprey interactions. In addition, we consider
that predatorprey relationships are measurable responses of toxicant exposure and provide ecological
insight into how contaminants modify predatorprey interactions.being the most sensitive species, followed by P. santafecinus, R. arenarum, and L. latrans. Predation
rates were evaluated using different treatments that combined predator and prey exposed or not to this
fungicide. TFS would alter the outcome of eeltadpole interaction by reducing prey movements; thus,
prey detection would decrease and therefore tadpole survival would increase. In addition, eels preyed
selectively upon non-exposed tadpoles avoiding the exposed ones almost all throughout the period evaluated.
Predation rate differed among prey species; such differences were not due to TFS exposure, but to
interspecific differences in behavior. The mechanism that would explain TFS-induced reduction in predation
rates remains unclear; however, what is clear is that sublethal TFS concentrations have the potential
to alter prey behavior, thereby indirectly altering predatorprey interactions. In addition, we consider
that predatorprey relationships are measurable responses of toxicant exposure and provide ecological
insight into how contaminants modify predatorprey interactions.