Estimating the density of a jaguar population in the Brazilian Pantanal using camera-traps and capture–recapture sampling in combination with GPS radio-telemetry

Soisalo, Marianne K.; Cavalcanti, Sandra M. C.

doi:10.1016/j.biocon.2005.11.023

Cited by 326 publications

(353 citation statements)

References 20 publications

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“…All surveys ran for a period of 62 days, cameras operated 24 hours per day and each 24-hour period constituted a sampling occasion. Sixty-two days was selected as a period that would ensure at least 1,000 camera-trap days (24-hour periods in which a camera station was operational) but that would not compromise population closure assumptions (Soisalo & Cavalcanti, 2006). Spoor surveys were analysed using techniques developed by Stander (1998) and Funston et al (2001).…”

Section: Methodsmentioning

confidence: 99%

The importance of farmland for the conservation of the brown hyaena Parahyaena brunnea

Kent

Hill

2013

Oryx

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract The conservation of wide-ranging, territorial carnivores presents many challenges, not least the inadequacy of many protected areas in providing sufficient space to allow such species to maintain viable populations. As a result populations occurring outside protected areas may be of considerable importance for the conservation of some species, although the significance of these areas is poorly understood. Brown hyaenas Parahyaena brunnea are categorized as Near Threatened on the IUCN Red List and recent research suggests the species may be particularly vulnerable to habitat loss and the conversion of land to agriculture. Here we report on the population density and abundance of brown hyaenas in an area of commercial farmland in western Botswana. Mean brown hyaena density estimated from camera-trap surveys was 2.3 per 100 km 2 and from spoor surveys was 2.88 per 100 km 2 , which are comparable to estimates reported for protected areas. Estimated densities were higher on farms used for livestock production than on those used for game farming, suggesting that the species can tolerate land use change where reliable alternative food resources exist. Our results indicate that populations of brown hyaenas in non-protected areas comprise a significant proportion of the global population and that such areas may be of critical importance for their conservation.

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Section: Methodsmentioning

confidence: 99%

The importance of farmland for the conservation of the brown hyaena Parahyaena brunnea

Kent

Hill

2013

Oryx

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“…Cullen et al 2005, Soisalo & Cavalcanti 2006, their large area requirements (Sanderson et al 2002b, Cullen et al 2005 and also because they are preferential targets to hunters (Redford 1992, Peres 1996, Cullen et al 2001, Travassos 2011. These factors has conducted to the loss of these animals in tropical forests, promoting profound transformations in forest dynamics and threaten the maintenance of these ecosystems (Stoner et al 2007, Jorge et al 2013, Kurten 2013, Harrison et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Medium and large-sized mammals of the Reserva Ecológica de Guapiaçú, Cachoeiras de Macacu, RJ

2014

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Medium and large-sized terrestrial mammals develop important functions in ecosystems maintenance. However, this group is the most vulnerable to local extinctions, through habitat loss or hunting. This study inventoried the community of medium and large mammals in the Reserva Ecológica de Guapiaçú (REGUA), Cachoeiras de Macacu, RJ, providing data on species composition, richness and abundance. Species were registered through the use of camera traps, sign survey and visual encounters on pre-existing trails and roads. The study was conducted from January to October 2012, with each month considered as a sample unit. An effort of 1568 cameras-day and 120 km traveled, resulted on 302 records of 22 species of medium and large-sized mammals, belonging to eight orders. This value corresponds to more than three-quarters of the richness described from this group in the Atlantic Forest of Rio de Janeiro state. Five species are under some level of regional, national or global threat. Three game species, Pecari tajacu, Cuniculus paca and Dasyprocta leporina were abundant in the area. The observed richness was comparable to that found in other studies conducted in rain forests. Thus, for its high number of species, including those under some degree of threat, we conclude that REGUA is an important area to mammal conservation, especially in the Atlantic Forest of Rio de Janeiro state.

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“…A utilização de armadilhas fotográficas em estudos desenvolvidos no Brasil pode ser considerada recente, sendo empregadas na amostragem qualitativa da mastofauna (MARQUES & RAMOS 2001, SANTOS-FILHO & SILVA 2002, SILVEIRA et al 2003, TROLLE 2003a, b, ALVES & ANDRIOLO 2005, SRBEK-ARAUJO & CHIARELLO 2005, na realização de estudos populacionais (TROLLE & KÉRY 2003, SOISALO & CAVALCANTI 2006) e como ferramenta complementar na obtenção de dados ecológicos (SANTOS-FILHO & SILVA 2002, TROLLE 2003b, JÁCOMO et al 2004, ALVES & ANDRIOLO 2005, MIRANDA et al 2005, GALETTI et al 2006. CUTLER & SWANN (1999) equipments.…”

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Armadilhas fotográficas na amostragem de mamíferos: considerações metodológias e comparação de equipamentos

Srbek‐Araujo

Chiarello

2007

Rev. Bras. Zool.

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A utilização de armadilhas fotográficas em estudos desenvolvidos no Brasil é recente. O alto custo dos equipamentos e os constantes gastos com material de consumo podem, em alguns casos, limitar o número de unidades e o tempo de amostragem. O presente estudo objetivou discutir questões metodológicas visando otimizar a utilização do equipamento no inventário de mamíferos, além de comparar dois modelos de armadilhas fotográficas. O estudo foi desenvolvido na Estação Biológica de Santa Lúcia, no centro-norte do estado do Espírito Santo entre janeiro de 2002 e novembro de 2003, utilizando três Wildlife Pro Camera© (WPC) e quatro DeerCam©. Constatou-se a importância da realização de amostragens em diferentes fitofisionomias, tendo sido observadas variações na composição da comunidade registrada em cada ambiente. Foi detectada uma correlação significativa entre número de espécies registradas e esforço de amostragem empregado em cada trilha, ressaltando o registro de 60% ou mais dos táxons amostrados em trilhas com esforço > 250 armadilhas-dia. Houve predomínio de registros noturnos (67%), embora o número de espécies registradas durante a noite tenha sido semelhante ao obtido ao longo do dia. Quando as armadilhas foram colocadas em pares, apenas 27% das fotografias foram simultâneas. Os equipamentos utilizados apresentaram diferenças significativas na durabilidade e eficiência na amostragem de mamíferos, tanto dentro como entre as marcas testadas.

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Estimating the density of a jaguar population in the Brazilian Pantanal using camera-traps and capture–recapture sampling in combination with GPS radio-telemetry

Cited by 326 publications

References 20 publications

The importance of farmland for the conservation of the brown hyaena Parahyaena brunnea

The importance of farmland for the conservation of the brown hyaena Parahyaena brunnea

Medium and large-sized mammals of the Reserva Ecológica de Guapiaçú, Cachoeiras de Macacu, RJ

Armadilhas fotográficas na amostragem de mamíferos: considerações metodológias e comparação de equipamentos

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