A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)

The American crocodile, Crocodylus acutus, has experienced important population declines worldwide due to human persecution, overexploitation and habitat loss. C. acutus remains critically endangered in some countries such as Colombia where the lack of detailed surveys on its ecology and distributio...

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Autores principales:	Espinosa,Mara I, Bertin,Angéline, Gómez,John, Mejía,Florencio, Guerra,Martha, Baez,Lina, Gouin,Nicolas, Patiño,Edgar
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2012
Materias:	Capture-recapture crocodile environmental variables mangrove
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382012000200006
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spelling	oai:scielo:S0717-653820120002000062012-10-16A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)Espinosa,Mara IBertin,AngélineGómez,JohnMejía,FlorencioGuerra,MarthaBaez,LinaGouin,NicolasPatiño,Edgar Capture-recapture crocodile environmental variables mangrove The American crocodile, Crocodylus acutus, has experienced important population declines worldwide due to human persecution, overexploitation and habitat loss. C. acutus remains critically endangered in some countries such as Colombia where the lack of detailed surveys on its ecology and distribution constitutes a major barrier to the development of effective conservation strategies. We conducted a three-year capture-recapture study to investigate the demographic status of C. acutus and to identify environmental variables likely to in uence its distribution in Portete Bay (Colombia). We estimated the crocodile population to be relatively small (< 140 animals), to include very few adults, and to demonstrate a very strong de cit in females in the juvenile class. Both mean air temperature and relative humidity were positively correlated with the number of sightings. In contrast, mean water salinity was found to decrease the probability of observing a crocodile, presumably due to juvenile preference for low salinity areas. Our findings suggest that the population of C. acutus in Portete Bay is at risk and may require human intervention to assure its persistence.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.76 n.1 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382012000200006en10.4067/S0717-65382012000200006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Capture-recapture crocodile environmental variables mangrove
spellingShingle	Capture-recapture crocodile environmental variables mangrove Espinosa,Mara I Bertin,Angéline Gómez,John Mejía,Florencio Guerra,Martha Baez,Lina Gouin,Nicolas Patiño,Edgar A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)
description	The American crocodile, Crocodylus acutus, has experienced important population declines worldwide due to human persecution, overexploitation and habitat loss. C. acutus remains critically endangered in some countries such as Colombia where the lack of detailed surveys on its ecology and distribution constitutes a major barrier to the development of effective conservation strategies. We conducted a three-year capture-recapture study to investigate the demographic status of C. acutus and to identify environmental variables likely to in uence its distribution in Portete Bay (Colombia). We estimated the crocodile population to be relatively small (< 140 animals), to include very few adults, and to demonstrate a very strong de cit in females in the juvenile class. Both mean air temperature and relative humidity were positively correlated with the number of sightings. In contrast, mean water salinity was found to decrease the probability of observing a crocodile, presumably due to juvenile preference for low salinity areas. Our findings suggest that the population of C. acutus in Portete Bay is at risk and may require human intervention to assure its persistence.
author	Espinosa,Mara I Bertin,Angéline Gómez,John Mejía,Florencio Guerra,Martha Baez,Lina Gouin,Nicolas Patiño,Edgar
author_facet	Espinosa,Mara I Bertin,Angéline Gómez,John Mejía,Florencio Guerra,Martha Baez,Lina Gouin,Nicolas Patiño,Edgar
author_sort	Espinosa,Mara I
title	A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)
title_short	A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)
title_full	A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)
title_fullStr	A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)
title_full_unstemmed	A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)
title_sort	three-year mark-recapture study in a remnant population of crocodylus acutus cuvier in portete bay (guajira, colombia)
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382012000200006
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A three-year mark-recapture study in a remnant population of Crocodylus acutus Cuvier in Portete Bay (Guajira, Colombia)

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