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8 results for “pygmy rabbit”
Data from: Under cover: The nuanced influence of functional properties of cover on resource selection by pygmy rabbits (Brachylagus idahoensis)
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Habitat distribution models for pygmy rabbits in Idaho
<p>Environmental relationships can differ across the geographic range of species, especially for widespread generalists. Because habitat specialists are more vulnerable to environmental changes, incorrect assumptions about consistent habitat associations could hinder strategic conservation efforts. We used species distribution models (SDMs) to evaluate intraspecific variation in habitat associations for a habitat specialist of conservation concern, the pygmy rabbit (<em>Brachylagus idahoensis</em>), which is endemic to the sagebrush biome of the western USA. Our goal was to model habitat associations for pygmy rabbits across a portion of their range to evaluate regional variation and contrast predictions with results from a model developed at the rangewide extent. We created inductive SDMs using maximum entropy methods within five ecological regions that encompassed about 20% of the species rangewide distribution and spanned diverse environmental gradients. We included a suite of environmental predictor variables representing topography, vegetation, climate, and soil characteristics. Results of the regional models identified substantial variation in habitat associations across the five regions, with each retaining a unique set of environmental predictors. Bioclimatic variables were the most influential environmental parameters in all five regions, but the specific variables differed. The models developed at regional extents predicted smaller areas of habitat (an average of 15% less for suitable habitat and 80% less for primary habitat) than predictions generated from a model developed at the rangewide extent. Because bioclimatic variables were effective in discriminating areas used by pygmy rabbits, they also provided an opportunity to assess potential changes in habitat distribution by incorporating future climate projections. Distributions modeled under two mid-century emission scenarios projected substantial reductions in suitable habitat for pygmy rabbits across most regions and pronounced variation among regions in the magnitude and direction of the climate effects. Collectively, results of this work underscore the need to incorporate regional variation in habitat associations into planning for current and future conservation and management strategies.</p>
Habitat distribution models for pygmy rabbits in Idaho
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Data from: Evaluating DNA degradation rates in faecal pellets of the endangered pygmy rabbit
Noninvasive genetic sampling of faecal pellets can be a valuable method for monitoring rare and cryptic wildlife populations, like the pygmy rabbit (Brachylagus idahoensis). To investigate this method's efficiency for pygmy rabbit monitoring, we evaluated the effect of sample age on DNA degradation in faecal pellets under summer field conditions. We placed 275 samples from known individuals in natural field conditions for 1 to 60 days and assessed DNA quality by amplifying a 294 base pair (bp) mitochondrial DNA (mtDNA) locus and 5 nuclear DNA (nDNA) microsatellite loci (111 – 221 bp). DNA degradation was influenced by sample age, DNA type, locus length, and rabbit sex. Both mtDNA and nDNA exhibited high PCR success rates (94.4%) in samples <1 day old. Success rates for microsatellite loci declined rapidly from 80.0% to 42.7% between days 5 and 7, likely due to increased environmental temperature. Success rates for mtDNA amplification remained higher than nDNA over time, with moderate success (66.7%) at 21 days. Allelic dropout rates were relatively high (17.6% at < 1 day) and increased to 100% at 60 days. False allele rates ranged from 0 to 30.0% and increased gradually over time. We recommend collecting samples as fresh as possible for individual identification during summer field conditions. Our study suggests that this method can be useful for future monitoring efforts, including occupancy surveys, individual identification, population estimation, parentage analysis, and monitoring of genetic diversity both of a reintroduced population in central Washington and across their range.
On following pages: 3. Natal Red Rock Hare (Pronolagus crassicaudatus); 4. Smith's Red Rock Hare (Pronolagus rupestris Rabbit (Bunolagus monticularis); 8. Pygmy Rabbit (Brachylagus idahoensis); 9. Sumatran Striped Rabbit (Nesolagus Jose Brush Rabbit (Sylvilagus mansuetus); 13. Desert Cottontail (Sylvilagus audubonii); 14. Mountain Cottontail (Sylvilagus); 5. Hewitt's Red Rock Hare (Pronolagus saundersiae); 6. Volcano Rabbit (Romerolagus diazi); 7. Riverine netscheri); 10. Annamite Striped Rabbit (Nesolagus timminsi); 11. Brush Rabbit (Sylvilagus bachmani); 12. San nuttalli); 15. New England Cottontail (Sylvilagus transitionalis). in Leporidae
On following pages: 3. Natal Red Rock Hare (Pronolagus crassicaudatus); 4. Smith's Red Rock Hare (Pronolagus rupestris Rabbit (Bunolagus monticularis); 8. Pygmy Rabbit (Brachylagus idahoensis); 9. Sumatran Striped Rabbit (Nesolagus Jose Brush Rabbit (Sylvilagus mansuetus); 13. Desert Cottontail (Sylvilagus audubonii); 14. Mountain Cottontail (Sylvilagus); 5. Hewitt's Red Rock Hare (Pronolagus saundersiae); 6. Volcano Rabbit (Romerolagus diazi); 7. Riverine netscheri); 10. Annamite Striped Rabbit (Nesolagus timminsi); 11. Brush Rabbit (Sylvilagus bachmani); 12. San nuttalli); 15. New England Cottontail (Sylvilagus transitionalis).
Pygmy rabbit landscape genomics in the southern Great Basin
<p>Local adaptation can occur when spatially separated populations are subjected to contrasting environmental conditions. Historically, understanding the genetic basis of adaptation has been difficult, but increased availability of genome-wide markers facilitates studies of local adaptation in non-model organisms of conservation concern. The pygmy rabbit (<i>Brachylagus idahoensis</i>) is an imperiled lagomorph that relies on sagebrush for forage and cover. This reliance has led to widespread population declines following reductions in the distribution of sagebrush, leading to geographic separation between populations. In this study, we used >20,000 single nucleotide polymorphisms (SNPs), genotype-environment association methods, and demographic modeling to examine neutral genetic variation and local adaptation in the pygmy rabbit in Nevada and California. We identified 308 loci as outliers, many of which had functional annotations related to metabolism of plant secondary compounds. Likewise, patterns of spatial variation in outlier loci were correlated with landscape and climatic variables including proximity to streams, sagebrush cover, and precipitation. We found that populations in the Mono Basin of California likely diverged from other Great Basin populations during late Pleistocene climate oscillations, and that this region is adaptively differentiated from other regions in the southern Great Basin despite limited gene flow and low effective population size. Our results demonstrate that peripherally isolated populations can maintain adaptive divergence.</p>
Pygmy rabbit landscape genomics in the southern Great Basin
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Data from: Evaluating DNA degradation rates in faecal pellets of the endangered pygmy rabbit
Open the record for dataset details and reuse information.
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