Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina

Mostrar todas las versiones(2)

We studied a Myocastor coypus (Molina, 1782) population during the authorised hunting season (AHS) and outside the hunting season (OHS) in the floodplain of the Paraná River (Argentina), a representative area for this species within its original geographic range. The aims of this work were to descri...

Descripción completa

Detalles Bibliográficos
Autor principal: Courtalon, Paula
Publicado: 2011
Materias:
Argentina
Hunting pressure
Myocastor coypus
Paraná River delta
Population ecology
Myocastoridae
Rodentia
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279383_v18_n2_p217_Courtalon
http://hdl.handle.net/20.500.12110/paper_03279383_v18_n2_p217_Courtalon
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03279383_v18_n2_p217_Courtalon
record_format dspace
spelling paper:paper_03279383_v18_n2_p217_Courtalon2023-06-08T15:33:30Z Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina Courtalon, Paula Argentina Hunting pressure Myocastor coypus Paraná River delta Population ecology Myocastor coypus Myocastoridae Rodentia We studied a Myocastor coypus (Molina, 1782) population during the authorised hunting season (AHS) and outside the hunting season (OHS) in the floodplain of the Paraná River (Argentina), a representative area for this species within its original geographic range. The aims of this work were to describe and compare fluctuations in population parameters (relative abundance, sex ratio, age structure) and in the physical condition between these two periods. Additionally, we discussed the possible occurrence of simultaneous influence of environmental factors (particularly the hydroperiod) and hunting pressure on these parameters. The absolute density during the AHS was 2.78 individuals/ha. No differences in the trapping success index were found between AHS and OHS. Throughout the study period the sex ratio remained 1:1. Adults predominated at the beginning of the AHS. There was no predominance of any age class during the OHS. The physical condition index (PCI) decreased during the AHS for both sexes, while in OHS only for females increased in December. No differences were found in the PCI between AHS and OHS for both sexes. The hydroperiod of the Paraná River showed a decrease during AHS and more stable but lower values during OHS. We hypothesise that these results could be related to a compensatory favourable effect of the habitat conditions (particularly the hydrological regime) over the negative effect of hunting pressure. © SAREM, 2011. Fil:Courtalon, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279383_v18_n2_p217_Courtalon http://hdl.handle.net/20.500.12110/paper_03279383_v18_n2_p217_Courtalon
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Hunting pressure
Myocastor coypus
Paraná River delta
Population ecology
Myocastor coypus
Myocastoridae
Rodentia
spellingShingle Argentina
Hunting pressure
Myocastor coypus
Paraná River delta
Population ecology
Myocastor coypus
Myocastoridae
Rodentia
Courtalon, Paula
Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina
topic_facet Argentina
Hunting pressure
Myocastor coypus
Paraná River delta
Population ecology
Myocastor coypus
Myocastoridae
Rodentia
description We studied a Myocastor coypus (Molina, 1782) population during the authorised hunting season (AHS) and outside the hunting season (OHS) in the floodplain of the Paraná River (Argentina), a representative area for this species within its original geographic range. The aims of this work were to describe and compare fluctuations in population parameters (relative abundance, sex ratio, age structure) and in the physical condition between these two periods. Additionally, we discussed the possible occurrence of simultaneous influence of environmental factors (particularly the hydroperiod) and hunting pressure on these parameters. The absolute density during the AHS was 2.78 individuals/ha. No differences in the trapping success index were found between AHS and OHS. Throughout the study period the sex ratio remained 1:1. Adults predominated at the beginning of the AHS. There was no predominance of any age class during the OHS. The physical condition index (PCI) decreased during the AHS for both sexes, while in OHS only for females increased in December. No differences were found in the PCI between AHS and OHS for both sexes. The hydroperiod of the Paraná River showed a decrease during AHS and more stable but lower values during OHS. We hypothesise that these results could be related to a compensatory favourable effect of the habitat conditions (particularly the hydrological regime) over the negative effect of hunting pressure. © SAREM, 2011.
author Courtalon, Paula
author_facet Courtalon, Paula
author_sort Courtalon, Paula
title Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina
title_short Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina
title_full Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina
title_fullStr Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina
title_full_unstemmed Evaluation of population parameters of coypu Myocastor coypus (Rodentia, Myocastoridae) during and outside the authorised hunting season in the floodplain of the Paraná River, Argentina
title_sort evaluation of population parameters of coypu myocastor coypus (rodentia, myocastoridae) during and outside the authorised hunting season in the floodplain of the paraná river, argentina
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279383_v18_n2_p217_Courtalon
http://hdl.handle.net/20.500.12110/paper_03279383_v18_n2_p217_Courtalon
work_keys_str_mv AT courtalonpaula evaluationofpopulationparametersofcoypumyocastorcoypusrodentiamyocastoridaeduringandoutsidetheauthorisedhuntingseasoninthefloodplainoftheparanariverargentina
_version_ 1768541655683563520

Ejemplares similares