Acute Toxicity and Etho-toxicity of Three Insecticides Used for Mosquito Control on Amphibian Tadpoles

Authors
Junges, Celina Maria; Maglianese, M. I.; Lajmanovich, Rafael Carlos; Peltzer, Paola; Attademo, Andres Maximiliano
Publication Year
2017
Language
English
Format
article
Status
Published version
Description
Among the measures used to manage mosquito populations and prevent human diseases, the application of pesticides is the global strategy mostly employed. To investigate the lethal and sublethal effects of insecticides used to control mosquitoes on amphibians (Rhinella arenarum, Rhinella fernandezae, and Physalaemus albonotatus), tadpoles were exposed to commercial formulations of temephos (Abate®), Bacillus thuringiensis var. israelensis (Introban®), and permethrin (Depe®). Their acute toxicity in terms of median lethal concentration (LC50) and no- (NOEC) and lowest-observed-effect concentrations (LOEC) was evaluated. To assess the sublethal effects on behavioral endpoints, tadpoles were exposed to the NOEC-24-h value of each insecticide. After that, tadpoles were recorded and video-streaming data were processed by Smart® software. Based on LC50, permethrin was the most toxic insecticide, followed by temephos and B. thuringiensis var. israelensis. Also, intraspecific and interspecific susceptibilities of tadpoles to insecticides were observed. Regarding behavior, the exposure of R. arenarum to the three insecticides had a significant effect on all behavioral endpoints. Two of the three swimming parameters evaluated for R. fernandezae were affected by permethrin, and in the end, only one behavioral pattern was altered in P. albonotatus after exposure to temephos. These results showed that tadpoles’ species were affected differently depending on the chemical properties of the pesticide and on a dose-response effect of the insecticides. Overall, our study suggests that further research is needed to quantify the potential damage of pyrethroid insecticides used for mosquito control on non-target aquatic organisms, mainly due to etho-toxic effects.
Fil: Junges, Celina Maria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Maglianese, M. I.. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Lajmanovich, Rafael Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Peltzer, Paola. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Attademo, Andres Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Subject
ADULTICIDES
AMPHIBIAN LARVAE
BEHAVIOR
LARVICIDES
MOSQUITO MANAGEMENT
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/58621