Home range and core area utilisation of three co-existing mongoose species: large grey, water and white-tailed in the fragmented landscape of the KwaZulu-Natal Midlands, South Africa

Streicher, Jarryd P.; Ramesh, Tharmalingam; Downs, Colleen T.

doi:10.1007/s42991-020-00028-8

Cited by 12 publications

(3 citation statements)

References 69 publications

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“…However, we did not find strong support for its inclusion in the model (present in 11 of 16 models with ΔAICc ≤ 2.0, sw = 0.52 and 95% CI: −0.18, 2.62), questioning whether the species is severely stressed by human presence. Resilience to stress caused by human presence due to the species’ known behavioural plasticity ( Monterroso et al , 2014 ; Streicher et al , 2020 ) could have facilitated expansion in spite of increasing human population density. Alternatively, an attenuation of the stress response due to habituation ( Cyr and Romero, 2009 ; Dickens and Romero, 2013 ) could explain absence of an increase in hGC levels with human density.…”

Section: Discussionmentioning

confidence: 99%

“…We found no support for our prediction that larger areas of Mediterranean shrub and agro-forestry habitats within each grid cell would be associated with lower levels of hGCs. This result could be due to the mongooses’ behavioural and dietary plasticity or alternatively by the dependence on resource-rich favourable habitat in the core areas of its territory that is not necessarily proportional to the size of the home range of each individual ( Streicher et al , 2020 ) or the area of favourable habitat available in each grid cell. Animal movement and high-resolution landscape data would be required to further analyse the relation between hGC and favourable habitat in the species.…”

Section: Discussionmentioning

confidence: 99%

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Decreasing glucocorticoid levels towards the expansion front suggest ongoing expansion in a terrestrial mammal

Azevedo

Bailey

Bandeira

et al. 2021

Conservation Physiology

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Understanding the causes of range expansions in abundant species can help predict future species distributions. During range expansions, animals are exposed to novel environments and are required to cope with new and unpredictable stressors. Glucocorticoids (GCs) are mediators of the hormonal and behavioural mechanisms allowing animals to cope with unpredictable changes in the environment and are therefore expected to differ between populations at expansion edge and the historic range. However, to date, very few studies have evaluated the relationship between GCs and range expansion. The Egyptian mongoose has been rapidly expanding its range in Portugal over the past 30 years. In this study, we applied an information theoretic approach to determine the most important spatial and environmental predictors of hair GCs (hGCs) in the population, after controlling for normal patterns of hGC variation in the species. We observed a decrease in hGC as distance from the historic range increased (i.e. closer to the expansion front). This distance term was present in all of the top models and had a 95% confidence interval (95% CI) that did not overlap with zero, strongly supporting its influence on hGC. We estimated a 0.031 pg/mg (95% CI: −0.057, −0.004) decrease in hGCs for each kilometre distance to the Tagus River, which was once the limit of the species’ distribution. Our results indicate that the species’ expansion is unlikely to be limited by mechanisms related to or mediated by the physiological stress response. The decrease in hGC levels towards the expansion edge coupled with limited evidence of a negative effect of human population density suggests that the species’ northward expansion in Portugal could continue.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Decreasing glucocorticoid levels towards the expansion front suggest ongoing expansion in a terrestrial mammal

Azevedo

Bailey

Bandeira

et al. 2021

Conservation Physiology

View full text Add to dashboard Cite

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“…Both mesocarnivores are listed as Least Concern, with a fairly wide range distribution (Child et al, 2016, 2017). Water mongoose also had a positive association with open areas, and Ehlers Smith et al (2017a) and Streicher et al (2020) suggested it may be because of the species foraging on insect species in open spaces.…”

Section: Discussionmentioning

confidence: 97%

Influence of microhabitat structure on large‐ and medium‐sized mammals in South African forests

Sosibo

Smith

et al. 2023

Afr J Ecol

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Microhabitats play a significant role in the persistence of mammalian species and communities. In South Africa, the forest biome is the smallest. It includes the naturally fragmented Southern Mistbelt Forest group, where little is known about contemporary mammalian assemblage dynamics concerning these forest's microhabitats. We determined the microhabitat characteristics that best explained mammalian species' presence and absence in these forests in the northern Eastern Cape and southern KwaZulu‐Natal provinces. We deployed a minimum of 60 camera traps at any time for 24 h/day to monitor mammalian species' presence/absence. We recorded a habitat foliage profile within a 20 m radius around each camera trap. The species most often photographed were Tragelaphus scriptus and Cercopithecus albogularis labiatus, with the least photographed species being Leptailurus serval and Felis silvestris cafra. All mammalian species detected in our study had a negative association with bare ground. Cercopithecus albogularis labiatus, an arboreal species that requires a dense connecting canopy for movement, showed a positive association with crown closure. Our study highlighted that microhabitat variables: leaf litter, crown closure and grass cover played an important role in the presence and persistence of large and medium‐sized mammalian species that inhabit the Southern Mistbelt Forests, which benefits forest conservation management plans.

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Spatial and Temporal Resource Partitioning of Small Carnivores in the African Rainforest

Nakashima¹,

Iwata²,

Ando³

et al. 2022

Small Carnivores

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Home range and core area utilisation of three co-existing mongoose species: large grey, water and white-tailed in the fragmented landscape of the KwaZulu-Natal Midlands, South Africa

Cited by 12 publications

References 69 publications

Decreasing glucocorticoid levels towards the expansion front suggest ongoing expansion in a terrestrial mammal

Decreasing glucocorticoid levels towards the expansion front suggest ongoing expansion in a terrestrial mammal

Influence of microhabitat structure on large‐ and medium‐sized mammals in South African forests

Spatial and Temporal Resource Partitioning of Small Carnivores in the African Rainforest

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