Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina

Differential predation upon tuco-tucos (Ctenomys talarum) by red-backed hawks (Buteo polyosoma) is reported, considering the characteristics that could lead to prey vulnerability and to predator selectivity. Predation was evaluated through analysis of 100 pellets and 20 prey remains collected in coa...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Baladrón, A.V., Malizia, A.I., Bó, M.S.
Formato: JOUR
Lenguaje:English
Materias:
Age classes
Predator-prey relationship
Red-backed hawk
Subterranean rodent
Tuco-tuco
Winter diet
Accipitrinae
Buteo polyosoma
Ctenomyidae
Ctenomys talarum
Raptores
Rodentia
Sus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01650521_v44_n2_p61_Baladron
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01650521_v44_n2_p61_Baladron
record_format dspace
spelling todo:paper_01650521_v44_n2_p61_Baladron2023-10-03T15:02:48Z Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina Baladrón, A.V. Malizia, A.I. Bó, M.S. Age classes Predator-prey relationship Red-backed hawk Subterranean rodent Tuco-tuco Winter diet Accipitrinae Buteo polyosoma Ctenomyidae Ctenomys talarum Raptores Rodentia Sus Differential predation upon tuco-tucos (Ctenomys talarum) by red-backed hawks (Buteo polyosoma) is reported, considering the characteristics that could lead to prey vulnerability and to predator selectivity. Predation was evaluated through analysis of 100 pellets and 20 prey remains collected in coastal grasslands at Mar de Cobo (Buenos Aires, Argentina) during winter (May to August) 2003-2004. The tuco-tucos represented the main component in the diet of red-backed hawks, registering a high consumption of sub-adult individuals (49.3%). Juvenile individuals (42.0%) were overrepresented and adults (8.7%) were underrepresented in relation to their field frequencies (14.4 and 43.1%, respectively), whereas sub-adults did not show significant differences. This high consumption of smaller tuco-tucos would be based on the higher vulnerability of young individuals to predation rather than raptor's handling constraints on bigger individuals. Our results indicate that a strong predator-prey relationship between tuco-tucos and red-backed hawks is established at the study area, and that tuco-tucos represent a key component for the survival of wintering hawks. Reportamos la depredacion diferencial sobre el tuco-tuco (Ctenomys talarum) por el aguilucho comun (Buteo polyosoma), considerando las caracteristicas que podrian determinar la vulnerabilidad de la presa y la selectividad del predador. La depredacion fue evaluada mediante el analisis de 100 egagropilas y 20 restos presa recolectados en pastizales costeros de la localidad de Mar de Cobo (Buenos Aires, Argentina) durante el periodo invernal Mayo-Agosto de 2003-2004. El tuco-tuco represento el principal componente en la dieta del aguilucho comun, registrandose un alto consumo de individuos subadultos (49.3%). Los individuos juveniles (42.0%) fueron sobrerrepresentados y los adultos (8.7%) fueron subrepresentados en la dieta en relacion a sus frecuencias en el campo (14.4 y 43.1%, respectivamente), mientras que los subadultos no mostraron diferencias significativas. Este elevado consumo de individuos mas pequenos radicaria en una mayor vulnerabilidad a la depredacion de los juveniles mas que en restricciones de manipuleo del predador sobre las presas mas grandes. Nuestros resultados indican que existe una estrecha relacion predador-presa entre el tuco-tuco y el aguilucho comun, y que los tuco-tucos representan un componente clave para la supervivencia invernal de los aguiluchos. © 2009 Taylor & Francis. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01650521_v44_n2_p61_Baladron
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic Age classes
Predator-prey relationship
Red-backed hawk
Subterranean rodent
Tuco-tuco
Winter diet
Accipitrinae
Buteo polyosoma
Ctenomyidae
Ctenomys talarum
Raptores
Rodentia
Sus
spellingShingle Age classes
Predator-prey relationship
Red-backed hawk
Subterranean rodent
Tuco-tuco
Winter diet
Accipitrinae
Buteo polyosoma
Ctenomyidae
Ctenomys talarum
Raptores
Rodentia
Sus
Baladrón, A.V.
Malizia, A.I.
Bó, M.S.
Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina
topic_facet Age classes
Predator-prey relationship
Red-backed hawk
Subterranean rodent
Tuco-tuco
Winter diet
Accipitrinae
Buteo polyosoma
Ctenomyidae
Ctenomys talarum
Raptores
Rodentia
Sus
description Differential predation upon tuco-tucos (Ctenomys talarum) by red-backed hawks (Buteo polyosoma) is reported, considering the characteristics that could lead to prey vulnerability and to predator selectivity. Predation was evaluated through analysis of 100 pellets and 20 prey remains collected in coastal grasslands at Mar de Cobo (Buenos Aires, Argentina) during winter (May to August) 2003-2004. The tuco-tucos represented the main component in the diet of red-backed hawks, registering a high consumption of sub-adult individuals (49.3%). Juvenile individuals (42.0%) were overrepresented and adults (8.7%) were underrepresented in relation to their field frequencies (14.4 and 43.1%, respectively), whereas sub-adults did not show significant differences. This high consumption of smaller tuco-tucos would be based on the higher vulnerability of young individuals to predation rather than raptor's handling constraints on bigger individuals. Our results indicate that a strong predator-prey relationship between tuco-tucos and red-backed hawks is established at the study area, and that tuco-tucos represent a key component for the survival of wintering hawks. Reportamos la depredacion diferencial sobre el tuco-tuco (Ctenomys talarum) por el aguilucho comun (Buteo polyosoma), considerando las caracteristicas que podrian determinar la vulnerabilidad de la presa y la selectividad del predador. La depredacion fue evaluada mediante el analisis de 100 egagropilas y 20 restos presa recolectados en pastizales costeros de la localidad de Mar de Cobo (Buenos Aires, Argentina) durante el periodo invernal Mayo-Agosto de 2003-2004. El tuco-tuco represento el principal componente en la dieta del aguilucho comun, registrandose un alto consumo de individuos subadultos (49.3%). Los individuos juveniles (42.0%) fueron sobrerrepresentados y los adultos (8.7%) fueron subrepresentados en la dieta en relacion a sus frecuencias en el campo (14.4 y 43.1%, respectivamente), mientras que los subadultos no mostraron diferencias significativas. Este elevado consumo de individuos mas pequenos radicaria en una mayor vulnerabilidad a la depredacion de los juveniles mas que en restricciones de manipuleo del predador sobre las presas mas grandes. Nuestros resultados indican que existe una estrecha relacion predador-presa entre el tuco-tuco y el aguilucho comun, y que los tuco-tucos representan un componente clave para la supervivencia invernal de los aguiluchos. © 2009 Taylor & Francis.
format JOUR
author Baladrón, A.V.
Malizia, A.I.
Bó, M.S.
author_facet Baladrón, A.V.
Malizia, A.I.
Bó, M.S.
author_sort Baladrón, A.V.
title Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina
title_short Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina
title_full Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina
title_fullStr Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina
title_full_unstemmed Predation upon the subterranean rodent Ctenomys talarum (tuco-tucos) by Buteo polyosoma (red-backed hawks) in coastal grasslands of Argentina
title_sort predation upon the subterranean rodent ctenomys talarum (tuco-tucos) by buteo polyosoma (red-backed hawks) in coastal grasslands of argentina
url http://hdl.handle.net/20.500.12110/paper_01650521_v44_n2_p61_Baladron
work_keys_str_mv AT baladronav predationuponthesubterraneanrodentctenomystalarumtucotucosbybuteopolyosomaredbackedhawksincoastalgrasslandsofargentina
AT maliziaai predationuponthesubterraneanrodentctenomystalarumtucotucosbybuteopolyosomaredbackedhawksincoastalgrasslandsofargentina
AT boms predationuponthesubterraneanrodentctenomystalarumtucotucosbybuteopolyosomaredbackedhawksincoastalgrasslandsofargentina
_version_ 1807318046926176256

Ejemplares similares