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28 results for “small carnivore”
Figure 2 in Head morphology reflects the introduction history in a globally invasive carnivore-the small Indian mongoose
Figure 2. Centroid size of the crania and mandibles of the specimens of small Indian mongoose from sampled localities in the native and introduced range. Large circles indicate mean values.
Figure 5 in Head morphology reflects the introduction history in a globally invasive carnivore-the small Indian mongoose
Figure 5. Cranial and mandibular shape assignments from the discriminant analyses of principal components.
Data from: Interactions between demography, genetics, and landscape connectivity increase extinction probability for a small population of large carnivores in a major metropolitan area
The extinction vortex is a theoretical model describing the process by which extinction risk is elevated in small, isolated populations owing to interactions between environmental, demographic, and genetic factors. However, empirical demonstrations of these interactions have been elusive. We modelled the dynamics of a small mountain lion population isolated by anthropogenic barriers in greater Los Angeles, California, to evaluate the influence of demographic, genetic, and landscape factors on extinction probability. The population exhibited strong survival and reproduction, and the model predicted stable median population growth and a 15% probability of extinction over 50 years in the absence of inbreeding depression. However, our model also predicted the population will lose 40–57% of its heterozygosity in 50 years. When we reduced demographic parameters proportional to reductions documented in another wild population of mountain lions that experienced inbreeding depression, extinction probability rose to 99.7%. Simulating greater landscape connectivity by increasing immigration to greater than or equal to one migrant per generation appears sufficient to largely maintain genetic diversity and reduce extinction probability. We provide empirical support for the central tenet of the extinction vortex as interactions between genetics and demography greatly increased extinction probability relative to the risk from demographic and environmental stochasticity alone. Our modelling approach realistically integrates demographic and genetic data to provide a comprehensive assessment of factors threatening small populations.
Figure 6 in Head morphology reflects the introduction history in a globally invasive carnivore-the small Indian mongoose
Figure 6. Disparity in cranial and mandibular shape.
Figure 4. Cranial and mandibular shape assignments from the k in Head morphology reflects the introduction history in a globally invasive carnivore-the small Indian mongoose
Figure 4. Cranial and mandibular shape assignments from the k-NN analyses.
Figure 3 in Head morphology reflects the introduction history in a globally invasive carnivore-the small Indian mongoose
Figure 3. Linear discriminant analyses of cranial and mandibular shape from the sampled localities.
Fig. 6. A in Small carnivores (Mammalia: Carnivora) in the Wonorejo Mangroves, Jawa Timur, Indonesia: habitat use and activity patterns
Fig. 6. A, Asian small-clawed otter on a dyke on 24 September 2018; B, activity pattern of the Asian small-clawed otter.
Data from: Interactions between demography, genetics, and landscape connectivity increase extinction probability for a small population of large carnivores in a major metropolitan area
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