Life history patterns and biology of the slender mongoose (<i>Galerella sanguinea</i>) in the Kalahari Desert

Graw, Beke; Manser, Marta B.

doi:10.1093/jmammal/gyw178

Cited by 6 publications

(16 citation statements)

References 38 publications

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“…The Hoenig model prediction was 0.14/year greater. Graw and Manser () reported that the maximum age for slender mongoose could be up to 10 years, rather than the 8 years used here; this would result in a lesser posterior median prediction of 0.30/year, placing it within 0.05/year of the reference value.…”

Section: Resultsmentioning

confidence: 67%

“…This may simply reflect the uncertainty in body mass predictions when body mass is small. Alternatively, given relatively low samples sizes of tagged individuals, the methods used to estimate survival rate in the mongoose population (Graw and Manser ) were arguably the least rigorous, so the reference value itself may be biased. Either way, the Hoenig model prediction is more credible, and if the maximum age were 10 years rather than the 8 years used here, it would have been within 0.05/year of the reference value.…”

Section: Discussionmentioning

confidence: 99%

“…In the mongoose population, mean adult survival rate was estimated across sexes as 0.78 (Graw and Manser 2017). Graw and Manser (2017) estimated survival rate as the proportion of radio-tagged adults that survived during each year of the study (2007)(2008)(2009)(2010)(2011). Mean adult body mass (both sexes) was 0.57 kg and maximum age (both sexes) was 8 years (n ¼ 131; Graw and Manser 2017).…”

Section: Validationmentioning

confidence: 99%

“…Graw and Manser (2017) estimated survival rate as the proportion of radio-tagged adults that survived during each year of the study (2007)(2008)(2009)(2010)(2011). Mean adult body mass (both sexes) was 0.57 kg and maximum age (both sexes) was 8 years (n ¼ 131; Graw and Manser 2017). The population was unexploited, with some anthropogenic mortality noted from road traffic collisions (Graw and Manser 2017).…”

Section: Validationmentioning

confidence: 99%

“…Mean adult body mass (both sexes) was 0.57 kg and maximum age (both sexes) was 8 years (n ¼ 131; Graw and Manser 2017). The population was unexploited, with some anthropogenic mortality noted from road traffic collisions (Graw and Manser 2017).…”

Section: Validationmentioning

confidence: 99%

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Establishing Bayesian priors for natural mortality rate in carnivore populations

2018

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In managed carnivore populations, natural mortality rate (d) is difficult to estimate directly, and context‐specific data are typically weakly informative about it. Nevertheless, natural mortality is potentially an important component of total mortality, particularly if additive to harvest or culling mortality. The natural mortality rate exhibits allometric or life‐history relationships that are invariant across diverse taxonomic groups, and it is valuable to derive estimates on this basis to serve as priors in later Bayesian models, steering parameter uncertainty towards biologically plausible values, and leading to more reliable model predictions and improved management recommendations. We used Bayesian hierarchical modeling and data from the literature to establish informative priors for instantaneous d as predictions scaled from body mass or maximum age. Posterior mean estimates of the scaling parameters of these models were −0.27 (body mass) and −1.07 (maximum age), respectively, conforming to expected values of −0.25 and −1.00. Direct estimates of d from published studies of coyotes (Canis latrans) in southern Texas, fisher (Pekania pennanti) in Sierra Nevada, and slender mongoose (Galerella sanguinea) in the Kalahari Desert were within the credible intervals of predictions for d using both models. We also compared survivorship curves based on model predictions with observed survivorship of red fox (Vulpes vulpes) from a variety of studies in Britain, among which intensity of culling varied markedly. Across all species, there was better support for the d prediction from maximum age, than from body mass. We thus recommend use of maximum age data to establish informative priors for d where possible. Posterior median predictions of d from maximum age were within 0.01–0.14/year of the direct estimates, whereas the differences between direct estimates and predictions from body mass were 0.04–0.27/year. Sensitivity analysis showed trivial effects of between‐sex differences in body mass, and age‐specific mortality, on predictions of d. Differences between body mass and maximum age model predictions were attributed to the relative importance of intrinsic and extrinsic mortality factors in the 2 approaches (i.e., maximum age predictions allowed for extrinsic factors to affect predicted mortality). © 2018 The Wildlife Society.

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Section: Resultsmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Section: Validationmentioning

confidence: 99%

Section: Validationmentioning

confidence: 99%

Section: Validationmentioning

confidence: 99%

See 3 more Smart Citations

Establishing Bayesian priors for natural mortality rate in carnivore populations

2018

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Evolution of the Carnassial in Living Mammalian Carnivores (Carnivora, Didelphimorphia, Dasyuromorphia): Diet, Phylogeny, and Allometry

2018

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Different living mammals have developed a carnivorous habit (e.g., Carnivora, Dasyuridae, Thylacinidae, some Didelphidae). They exhibit different specializations for carnivory; however, they share some characters such as a carnassial molar. Previous studies have correlated the shape of molars with diet using morphometric indices or surface scans. In this work, we used 3D geometric morphometrics to explore the shape of the lower carnassials of 235 specimens corresponding to 71 extant species of Carnivora and six extant species of Marsupialia, both Didelphimorphia and Dasyuromorphia. We statistically estimated the effect of size, diet, and phylogeny on molar shape. All the analyses indicated a higher correlation between diet and molar shape, and a better correlation between molar shape and the position of each species on the phylogeny. Therefore, if we take into account the phylogenetic pattern, we can use molar morphology to infer diet of fossil species. Finally, this work evaluates for the first time, in a quantitative way, which of the lower molars of the Metatheria (m3 or m4) is the best analogue to the m1 of Carnivora; our results indicated the m4 is the best analogue.

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Social organization of a solitary carnivore: spatial behaviour, interactions and relatedness in the slender mongoose

2019

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The majority of carnivore species are described as solitary, but little is known about their social organization and interactions with conspecifics. We investigated the spatial organization and social interactions as well as relatedness of slender mongooses ( Galerella sanguinea ) living in the southern Kalahari. This is a little studied small carnivore previously described as solitary with anecdotal evidence for male associations. In our study population, mongooses arranged in spatial groups consisting of one to three males and up to four females. Male ranges, based on sleeping sites, were large and overlapping, encompassing the smaller and more exclusive female ranges. Spatial groups could be distinguished by their behaviour, communal denning and home range. Within spatial groups animals communally denned in up to 33% of nights, mainly during winter months, presumably to gain thermoregulatory benefits. Associations of related males gained reproductive benefits likely through increased territorial and female defence. Our study supports slender mongooses to be better described as solitary foragers living in a complex system of spatial groups with amicable social interactions between specific individuals. We suggest that the recognition of underlying ‘hidden' complexities in these apparently ‘solitary' organizations needs to be accounted for when investigating group living and social behaviour.

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Life history patterns and biology of the slender mongoose (Galerella sanguinea) in the Kalahari Desert

Cited by 6 publications

References 38 publications

Establishing Bayesian priors for natural mortality rate in carnivore populations

Establishing Bayesian priors for natural mortality rate in carnivore populations

Evolution of the Carnassial in Living Mammalian Carnivores (Carnivora, Didelphimorphia, Dasyuromorphia): Diet, Phylogeny, and Allometry

Social organization of a solitary carnivore: spatial behaviour, interactions and relatedness in the slender mongoose

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