Can intra-specific variation in carnivore home-range size be explained using remote-sensing estimates of environmental productivity?

Nilsen, Erlend B.; Herfindal, Ivar; Linnell, John Durrus

doi:10.2980/i1195-6860-12-1-68.1

Cited by 117 publications

(139 citation statements)

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“…In this regard, food availability, habitat productivity and even seasonality have been important predictors of home range size in mammals (Harestad and Bunnel 1979;Tufto et al 1996;Ferguson et al 1999;Grigione et al 2002;Nilsen et al 2005). Much of the variation in home range size of carnivores is due to these same factors (Grigione et al 2002;Nilsen et al 2005). However, Grigione et al (2002) revealed that sex might be a strong determinant of home range size in some carnivores.…”

Section: I��mentioning

confidence: 93%

“…For instance, carnivores tend to have larger home ranges than omnivores of the same body mass, which in turn have larger home ranges than herbivores (Kelt and Van Vuren 2001). In this regard, food availability, habitat productivity and even seasonality have been important predictors of home range size in mammals (Harestad and Bunnel 1979;Tufto et al 1996;Ferguson et al 1999;Grigione et al 2002;Nilsen et al 2005). Much of the variation in home range size of carnivores is due to these same factors (Grigione et al 2002;Nilsen et al 2005).…”

Section: I��mentioning

confidence: 99%

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Factores que afectan el tamaño del ámbito hogareño de felinos (Mammalia, Carnívora), con énfasis en tres especies americanas

et al. 2017

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ABSTRACT. We evaluated several factors that might be related to the home-range size of felids at both inter and intraspecific levels. At the interspecific level, we tested the influence of body mass on home range size of 19 felid species, while controlling for phylogeny. At the species level, we evaluated the effect of sex and habitat type (open vs. closed) on the home range size of three species of felids occurring in America, Panthera onca, Leopardus pardalis and Puma concolor, which are among the most studied species concerning home ranges. Body mass, sex, and home range data were extracted from the Pantheria database (for 19 species, for interspecific comparisons) and from 48 studies for intraspecific comparisons. We assessed the influence of body mass on the home range size of felids using phylogenetic generalized least squares analysis. We evaluated the existence of sexual dimorphism on both home range size and body mass using paired t-tests. Finally, we investigated the influence of habitat type (open vs. closed) on home range size using ANOVA. Our results show that home range size is positively influenced by body mass in felids. At the intraspecific level, we confirmed that both the body mass and home range are larger for males than for the females in P. onca, L. pardalis and P. concolor. Moreover, the average home range size of P. onca is larger in open (i.e., grasslands, deserts and shrublands) than in closed (i.e., forests) habitats. Overall, our results confirm that larger home ranges are associated with larger body sizes in animals that need a large amount of food resources or specific resources (such as the specific prey requirements of felids) to maintain their metabolic rates. Furthermore, home range size of these three felids seems to be strongly influenced by reproductive attributes as well as by habitat quality, suggesting a connection with the spatial distribution of both food (prey) and mates.[KEYWORDS: Pantera onca, Leopardus pardalis, Puma concolor, sexual dimorphism, body size, environment, territory] RESUMEN. Factores que afectan el tamaño del ámbito hogareño de felinos (Mammalia, Carnívora), con énfasis en tres especies americanas. El objetivo de este estudio fue evaluar los factores que influyen en el tamaño del ámbito hogareño de felinos en los niveles inter-e intraespecífico. En nivel interespecífico, evaluamos la influencia de la masa corporal en el ámbito hogareño de 19 especies de felinos, controlando la filogenia. A nivel de especies, evaluamos el efecto del sexo y el hábitat (abierto vs. cerrado) sobre el ámbito hogareño de tres especies de felinos americanos, Panthera onca, Leopardus pardalis y Puma concolor, para los cuales existe una buena cantidad de información. Los datos de masa corporal, sexo y ámbito hogareño fueron extraídos de la base de datos Pantheria (para 19 especies, para comparación interespecífica) y 48 estudios para la variación intraespecífica. Evaluamos la influencia de la masa corporal en el tamaño del ámbito hogareño de felinos utilizando un análisis filoge...

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Section: I��mentioning

confidence: 93%

Section: I��mentioning

confidence: 99%

Factores que afectan el tamaño del ámbito hogareño de felinos (Mammalia, Carnívora), con énfasis en tres especies americanas

et al. 2017

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“…Risk of predation often translates into occupation of lower quality areas that can negatively affect the fitness of the smaller carnivores, resulting in lower reproductive success and survival rates (Brook et al 2012;Ritchie and Johnson 2009). As a result, larger carnivores exclude smaller ones from higher resource areas or from larger prey (Davis et al 2011;Nilsen et al 2005;Prugh et al 2009). However, the degree of the effect of top predators and the coexistence among predators may depend on habitat productivity (as related to prey availability) and habitat complexity, as has been seen among raptors (Chakarov and Krüger 2010 (Cupples et al 2011), dingoes are the largest mammalian predator in Australia.…”

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confidence: 99%

Ecology and predator associations of the northern quoll (Dasyurus hallucatus) in the Pilbara

Hernández-Santín¹

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The northern quoll (Dasyurus hallucatus) is an endangered carnivorous marsupial in the family Dasyuridae that occurs in the northern third of Australia. It has declined throughout its range, especially in open, lowland habitats. This led to the hypothesis that rocky outcrops where it persists provide a safe haven from introduced predators and provide greater microhabitat heterogeneity associated with higher prey availability.Proposed causes of decline include introduced cane toads (Rhinella marina, which are toxic), predation by feral cats (Felis catus), foxes (Vulpes vulpes), and the dingo (Canis lupus), and habitat alteration by changes in fire regimes. The National Recovery Plan highlighted knowledge gaps relevant to the conservation of the northern quoll. These include assembling data on ecology and population status, determining factors in survival, especially introduced predators, selecting areas that can be used as refuges, and identifying and securing key populations. The Pilbara region in Western Australia is a key population currently free of invasive cane toads (a major threat).The Pilbara is a semi-arid to arid area subject to cyclones between December and ). These are dominated by spinifex (hummock) grasslands, with rugged rock outcrops, shrublands, riparian areas, and some soft (tussock) grasslands. They are subject to frequent seasonal fires, creating a mosaic of recently burnt and longer unburnt areas. The overall aim of this study was to assess the ecology of the northern quoll in the Pilbara to understand drivers of density and distribution of this endangered species, to enhance species-specific conservation efforts. I collected field data on six one-month trips over three years, predominantly using live-trapping, camera-trapping, sampling invertebrates, vegetation surveys, habitat structure, and den availability surveys.In the Pilbara, the largest mammalian predators are the introduced dingo and feral cat. The largest native mammalian carnivore is the northern quoll, which is smaller than the introduced predators but larger than the other dasyurids in the guild. In Chapter 2, I explored spatial and temporal associations among introduced predators and quolls and their associations with habitat to assess the impact of introduced predators on quolls. I found evidence that dingo control programs prevent dingoes from fulfilling their role as top predators, leading to mesopredator release of feral cats. Feral cats were associated with 3 open habitats (spinifex grasslands and recently burnt areas), and showed inverse associations to those of quolls, suggesting that quolls avoid cats in space. Quolls were positively associated with rocky habitats. In Chapter 3, I assessed spatial and temporal associations among dasyurids to understand the current role of northern quolls within their guild. I found that range contraction of northern quolls into rocky habitats prevent them from fulfilling their role as top predators across the landscape, potentially leading to mesopredator release of kalutas (Da...

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“…Though the associations are nuanced and complex, at the most simplistic level increased vegetation productivity generates more energy available to support species and therefore higher biodiversity [32][33][34][35][36][37]. More specifically, derivatives of fPAR have been related to species distribution and diversity [28,38].…”

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confidence: 99%

Predicting Climate Change Impacts to the Canadian Boreal Forest

et al. 2014

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Climate change is expected to alter temperature, precipitation, and seasonality with potentially acute impacts on Canada's boreal. In this research we predicted future spatial distributions of biodiversity in Canada's boreal for 2020, 2050, and 2080 using indirect indicators derived from remote sensing and based on vegetation productivity. Vegetation productivity indices, representing annual amounts and variability of greenness, have been shown to relate to tree and wildlife richness in Canada's boreal. Relationships between historical satellite-derived productivity and climate data were applied to modelled scenarios of future climate to predict and map potential future vegetation productivity for 592 regions across Canada. Results indicated that the pattern of vegetation productivity will become more homogenous, particularly west of Hudson Bay. We expect climate change to impact biodiversity along north/south gradients and by 2080 vegetation distributions will be dominated by processes of seasonality in the north and a combination of cumulative greenness and minimum cover in the south. The Hudson Plains, which host the world's largest and most contiguous wetland, are predicted to experience less seasonality OPEN ACCESS Diversity 2014, 6 134 and more greenness. The spatial distribution of predicted trends in vegetation productivity was emphasized over absolute values, in order to support regional biodiversity assessments and conservation planning.

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Can intra-specific variation in carnivore home-range size be explained using remote-sensing estimates of environmental productivity?

Cited by 117 publications

References 36 publications

Factores que afectan el tamaño del ámbito hogareño de felinos (Mammalia, Carnívora), con énfasis en tres especies americanas

Factores que afectan el tamaño del ámbito hogareño de felinos (Mammalia, Carnívora), con énfasis en tres especies americanas

Ecology and predator associations of the northern quoll (Dasyurus hallucatus) in the Pilbara

Predicting Climate Change Impacts to the Canadian Boreal Forest

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