Toxicities of glyphosate- and cypermethrin-based pesticides are antagonic in the tenspotted livebearer fish (Cnesterodon decemmaculatus)

Authors
Brodeur, Celine Marie Julie; Malpel, Solene; Anglesio, Ana Belén; Cristos, Diego Sebastian; D'Andrea, María Florencia; Poliserpi, Maria Belen
Publication Year
2016
Language
English
Format
article
Status
Published version
Description
Although pesticide contamination of surface waters normally occurs in the form of mixtures, the toxicity and interactions displayed by such mixtures have been little characterized until now. The present study examined the interactions prevailing in equitoxic and non-equitoxic binary mixtures of formulations of glyphosate (Glifoglex®) and cypermethrin (Glextrin®) to the tenspotted livebearer (Cnesterodon decemmaculatus), a widely distributed South American fish. The following 96 h-LC50s were obtained when pesticide formulations were tested individually: Glifoglex® 41.4 and 53 mg ae glyphosate/L; Glextrin® 1.89 and 2.60 mg cypermethrin/L. Equitoxic and non-equitoxic mixtures were significantly antagonic in all combinations tested. The magnitude of the antagonism (factor by which toxicity differed from concentration addition) varied between 1.37 and 3.09 times in the different non-equitoxic mixtures tested. Antagonism was due to a strong inhibition of cypermethrin toxicity by the glyphosate formulation, the toxicity of the cypermethrin-based pesticide being almost completely overridden by the glyphosate formulation. Results obtained in the current study with fish are radically opposite to those previously observed in tadpoles where synergy was observed when Glifoglex® and Glextrin® were present in mixtures (Brodeur et al., 2014).
Fil: Brodeur, Celine Marie Julie. INTA. Instituto de Recursos Bilológicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Malpe, Solene. Université Paul Sabatier. Département Génie Biologique. Institut Universitaire de Technologie; Francia
Fil: Anglesio, Ana Belen. INTA. Instituto de Recursos Biológicos; Argentina
Fil: Cristos, Diego. INTA. Instituto de Tecnología de Alimentos; Argentina
Fil: D'Andrea, María Florencia. INTA. Instituto de Recursos Biológicos; Argentina
Fil: Poliserpi, María Belen. INTA. Instituto de Recursos Biológicos; Argentina
Source
Chemosphere 155 : 429-435. (2016)
Subject
Glifosato
Cipermetrin
Toxicidad de los Pesticidas
Peces
Glyphosate
Cypermethrin
Pesticide Toxicity
Fishes
Cnesterodon Decemmaculatus
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/2099