Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis
Populations of feral (not owned by humans) and domestic cats Felis catus coexist in most inhabited islands, and they have similar impacts on native species. Feral cats are generally believed to vary their diet according to prey availability; however, no previous studies of diet have tested this hypothesis on insular ecosystems with a limited range of available prey. Because domestic cats kill prey independently of hunger, the spatial extent of their impact on wildlife will be influenced by home-range size. In this study, we combined dietary information with cat movements to assess the impacts of feral and domestic cats on island biodiversity. We quantified the diet of cats from scat samples collected across one year and tested whether diet varies by season. The abundance of main prey categories was also estimated to document seasonal variation in prey availability for cats. Finally, we tracked domestic cats by global positioning system units in all four seasons to examine whether home-range patterns varied seasonally. The diet of cats constituted three prey groups (rodents, birds and invertebrates), and the seasonal variation in consumption of each taxon matched the seasonal variation in prey availability, thus supporting the generalist behaviour of cats on oceanic islands. Roaming behaviour varied among individuals and across seasons, but could not be explained by availability of prey. Unconfined cats had larger home-ranges than confined cats, but most domestic cats strayed <1 km from home. Thus, confinement of domestic cats might reduce the spatial extent of cat impact on native prey populations on oceanic islands.
Main Authors: | , , , , , , , |
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Format: | artículo biblioteca |
Language: | English |
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Wiley-Blackwell
2014
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Subjects: | Feral cats, Domestic cats, Generalist predator, GPS, Home-range size, Prey avalaibility, Scat competition, |
Online Access: | http://hdl.handle.net/10261/159823 |
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dig-ipna-es-10261-1598232019-11-18T11:16:48Z Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis Hervías-Parejo, Sandra Oppel, S. Medina, Félix M. Pipa, T. Díez-Fernández, Alazne Ramos, Jaime A. Ruiz de Ybáñez, María Rocío Nogales, Manuel Feral cats Domestic cats Generalist predator GPS Home-range size Prey avalaibility Scat competition Populations of feral (not owned by humans) and domestic cats Felis catus coexist in most inhabited islands, and they have similar impacts on native species. Feral cats are generally believed to vary their diet according to prey availability; however, no previous studies of diet have tested this hypothesis on insular ecosystems with a limited range of available prey. Because domestic cats kill prey independently of hunger, the spatial extent of their impact on wildlife will be influenced by home-range size. In this study, we combined dietary information with cat movements to assess the impacts of feral and domestic cats on island biodiversity. We quantified the diet of cats from scat samples collected across one year and tested whether diet varies by season. The abundance of main prey categories was also estimated to document seasonal variation in prey availability for cats. Finally, we tracked domestic cats by global positioning system units in all four seasons to examine whether home-range patterns varied seasonally. The diet of cats constituted three prey groups (rodents, birds and invertebrates), and the seasonal variation in consumption of each taxon matched the seasonal variation in prey availability, thus supporting the generalist behaviour of cats on oceanic islands. Roaming behaviour varied among individuals and across seasons, but could not be explained by availability of prey. Unconfined cats had larger home-ranges than confined cats, but most domestic cats strayed <1 km from home. Thus, confinement of domestic cats might reduce the spatial extent of cat impact on native prey populations on oceanic islands. Peer reviewed 2018-01-30T08:14:25Z 2018-01-30T08:14:25Z 2014 artículo http://purl.org/coar/resource_type/c_6501 Journal of Zoology, 292(1): 39-47 (2014) http://hdl.handle.net/10261/159823 10.1111/jzo.12082 en Postprint htpp://dx.doi.org/10.1111/jzo.12082 Sí open Wiley-Blackwell |
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Feral cats Domestic cats Generalist predator GPS Home-range size Prey avalaibility Scat competition Feral cats Domestic cats Generalist predator GPS Home-range size Prey avalaibility Scat competition |
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Feral cats Domestic cats Generalist predator GPS Home-range size Prey avalaibility Scat competition Feral cats Domestic cats Generalist predator GPS Home-range size Prey avalaibility Scat competition Hervías-Parejo, Sandra Oppel, S. Medina, Félix M. Pipa, T. Díez-Fernández, Alazne Ramos, Jaime A. Ruiz de Ybáñez, María Rocío Nogales, Manuel Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
description |
Populations of feral (not owned by humans) and domestic cats Felis catus coexist in most inhabited islands, and they have similar impacts on native species. Feral cats are generally believed to vary their diet according to prey availability; however, no previous studies of diet have tested this hypothesis on insular ecosystems with a limited range of available prey. Because domestic cats kill prey independently of hunger, the spatial extent of their impact on wildlife will be influenced by home-range size. In this study, we combined dietary information with cat movements to assess the impacts of feral and domestic cats on island biodiversity. We quantified the diet of cats from scat samples collected across one year and tested whether diet varies by season. The abundance of main prey categories was also estimated to document seasonal variation in prey availability for cats. Finally, we tracked domestic cats by global positioning system units in all four seasons to examine whether home-range patterns varied seasonally. The diet of cats constituted three prey groups (rodents, birds and invertebrates), and the seasonal variation in consumption of each taxon matched the seasonal variation in prey availability, thus supporting the generalist behaviour of cats on oceanic islands. Roaming behaviour varied among individuals and across seasons, but could not be explained by availability of prey. Unconfined cats had larger home-ranges than confined cats, but most domestic cats strayed <1 km from home. Thus, confinement of domestic cats might reduce the spatial extent of cat impact on native prey populations on oceanic islands. |
format |
artículo |
topic_facet |
Feral cats Domestic cats Generalist predator GPS Home-range size Prey avalaibility Scat competition |
author |
Hervías-Parejo, Sandra Oppel, S. Medina, Félix M. Pipa, T. Díez-Fernández, Alazne Ramos, Jaime A. Ruiz de Ybáñez, María Rocío Nogales, Manuel |
author_facet |
Hervías-Parejo, Sandra Oppel, S. Medina, Félix M. Pipa, T. Díez-Fernández, Alazne Ramos, Jaime A. Ruiz de Ybáñez, María Rocío Nogales, Manuel |
author_sort |
Hervías-Parejo, Sandra |
title |
Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
title_short |
Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
title_full |
Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
title_fullStr |
Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
title_full_unstemmed |
Assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
title_sort |
assessing the impact of introduced cats on island biodiversity by combining dietary and movement analysis |
publisher |
Wiley-Blackwell |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/159823 |
work_keys_str_mv |
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