Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus

The effect of the herbicide atrazine was assayed in early juveniles of the redclaw crayfish Cherax quadricarinatus. Four cohorts of juveniles (a total of 280 animals) were exposed for 4 wk to each one of three atrazine concentrations (0.1, 0.5 and 2.5 mg/L) or a control (0 mg/L), from a commercial f...

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Autores principales:	Mac Loughlin, C., Canosa, I.S., Silveyra, G.R., López Greco, L.S., Rodríguez, E.M.
Formato:	JOUR
Materias:	Atrazine Crayfish Growth Sex differentiation adenosine triphosphate atrazine herbicide fresh water crustacean growth response juvenile molt mortality sex-related difference abdominal wall musculature animal experiment Article body growth Cherax quadricarinatus cohort analysis controlled study crayfish drug effect gonad histopathology molting nonhuman protein content sex differentiation weight gain animal chemistry dose response drug effects endocrine system female growth, development and aging male Animalia Astacoidea Animals Dose-Response Relationship, Drug Endocrine System Female Fresh Water Gonads Herbicides Male Molting Sex Differentiation
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_01476513_v131_n_p96_MacLoughlin
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_01476513_v131_n_p96_MacLoughlin
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spelling	todo:paper_01476513_v131_n_p96_MacLoughlin2023-10-03T15:00:39Z Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus Mac Loughlin, C. Canosa, I.S. Silveyra, G.R. López Greco, L.S. Rodríguez, E.M. Atrazine Crayfish Growth Sex differentiation adenosine triphosphate atrazine herbicide atrazine fresh water herbicide atrazine crustacean growth response juvenile molt mortality sex-related difference abdominal wall musculature animal experiment Article body growth Cherax quadricarinatus cohort analysis controlled study crayfish drug effect gonad histopathology juvenile molting mortality nonhuman protein content sex differentiation weight gain animal chemistry crayfish dose response drug effects endocrine system female growth, development and aging male sex differentiation Animalia Astacoidea Cherax quadricarinatus Animals Astacoidea Atrazine Dose-Response Relationship, Drug Endocrine System Female Fresh Water Gonads Herbicides Male Molting Sex Differentiation The effect of the herbicide atrazine was assayed in early juveniles of the redclaw crayfish Cherax quadricarinatus. Four cohorts of juveniles (a total of 280 animals) were exposed for 4 wk to each one of three atrazine concentrations (0.1, 0.5 and 2.5 mg/L) or a control (0 mg/L), from a commercial formulation having 90% of active principle. At the end of the exposure, no significant (p>0.05) differences in either mortality or molting were noted. However, the weight gain and the protein content of abdominal muscle decreased significantly (p<0.05) in the highest atrazine concentration as compared to control, indicating that atrazine acted as a relevant stressor, although at a concentration higher than those reported in the environment. Besides, the proportion of females increased progressively as the atrazine concentration increases, being significantly (p<0.05) higher than that of controls at the highest concentration assayed. Both macroscopic and histological analysis revealed a normal architecture of gonopores and gonads in both control and exposed animals. The obtained results strongly suggest that atrazine could be causing an endocrine disruption on the hormonal system responsible for the sexual differentiation of the studied species, increasing the proportion of female proportion without disturbing the gonad structure. © 2016 Elsevier Inc. Fil:Rodríguez, E.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01476513_v131_n_p96_MacLoughlin
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Atrazine Crayfish Growth Sex differentiation adenosine triphosphate atrazine herbicide atrazine fresh water herbicide atrazine crustacean growth response juvenile molt mortality sex-related difference abdominal wall musculature animal experiment Article body growth Cherax quadricarinatus cohort analysis controlled study crayfish drug effect gonad histopathology juvenile molting mortality nonhuman protein content sex differentiation weight gain animal chemistry crayfish dose response drug effects endocrine system female growth, development and aging male sex differentiation Animalia Astacoidea Cherax quadricarinatus Animals Astacoidea Atrazine Dose-Response Relationship, Drug Endocrine System Female Fresh Water Gonads Herbicides Male Molting Sex Differentiation
spellingShingle	Atrazine Crayfish Growth Sex differentiation adenosine triphosphate atrazine herbicide atrazine fresh water herbicide atrazine crustacean growth response juvenile molt mortality sex-related difference abdominal wall musculature animal experiment Article body growth Cherax quadricarinatus cohort analysis controlled study crayfish drug effect gonad histopathology juvenile molting mortality nonhuman protein content sex differentiation weight gain animal chemistry crayfish dose response drug effects endocrine system female growth, development and aging male sex differentiation Animalia Astacoidea Cherax quadricarinatus Animals Astacoidea Atrazine Dose-Response Relationship, Drug Endocrine System Female Fresh Water Gonads Herbicides Male Molting Sex Differentiation Mac Loughlin, C. Canosa, I.S. Silveyra, G.R. López Greco, L.S. Rodríguez, E.M. Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus
topic_facet	Atrazine Crayfish Growth Sex differentiation adenosine triphosphate atrazine herbicide atrazine fresh water herbicide atrazine crustacean growth response juvenile molt mortality sex-related difference abdominal wall musculature animal experiment Article body growth Cherax quadricarinatus cohort analysis controlled study crayfish drug effect gonad histopathology juvenile molting mortality nonhuman protein content sex differentiation weight gain animal chemistry crayfish dose response drug effects endocrine system female growth, development and aging male sex differentiation Animalia Astacoidea Cherax quadricarinatus Animals Astacoidea Atrazine Dose-Response Relationship, Drug Endocrine System Female Fresh Water Gonads Herbicides Male Molting Sex Differentiation
description	The effect of the herbicide atrazine was assayed in early juveniles of the redclaw crayfish Cherax quadricarinatus. Four cohorts of juveniles (a total of 280 animals) were exposed for 4 wk to each one of three atrazine concentrations (0.1, 0.5 and 2.5 mg/L) or a control (0 mg/L), from a commercial formulation having 90% of active principle. At the end of the exposure, no significant (p>0.05) differences in either mortality or molting were noted. However, the weight gain and the protein content of abdominal muscle decreased significantly (p<0.05) in the highest atrazine concentration as compared to control, indicating that atrazine acted as a relevant stressor, although at a concentration higher than those reported in the environment. Besides, the proportion of females increased progressively as the atrazine concentration increases, being significantly (p<0.05) higher than that of controls at the highest concentration assayed. Both macroscopic and histological analysis revealed a normal architecture of gonopores and gonads in both control and exposed animals. The obtained results strongly suggest that atrazine could be causing an endocrine disruption on the hormonal system responsible for the sexual differentiation of the studied species, increasing the proportion of female proportion without disturbing the gonad structure. © 2016 Elsevier Inc.
format	JOUR
author	Mac Loughlin, C. Canosa, I.S. Silveyra, G.R. López Greco, L.S. Rodríguez, E.M.
author_facet	Mac Loughlin, C. Canosa, I.S. Silveyra, G.R. López Greco, L.S. Rodríguez, E.M.
author_sort	Mac Loughlin, C.
title	Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus
title_short	Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus
title_full	Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus
title_fullStr	Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus
title_full_unstemmed	Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus
title_sort	effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish cherax quadricarinatus
url	http://hdl.handle.net/20.500.12110/paper_01476513_v131_n_p96_MacLoughlin
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Effects of atrazine on growth and sex differentiation, in juveniles of the freshwater crayfish Cherax quadricarinatus

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