| genetic diversity and genetic structure of an endemic mexican dusky rattlesnake (crotalus triseriatus) in a highly modified agricultural landscape: implications for conservation. | it is necessary to determine genetic diversity of fragmented populations in highly modified landscapes to understand how populations respond to land-use change. this information will help guide future conservation and management strategies. we conducted a population genetic study on an endemic mexican dusky rattlesnake (crotalus triseriatus) in a highly modified landscape near the toluca metropolitan area, in order to provide crucial information for the conservation of this species. there was me ... | 2015 | 26497875 |
| multilocus species delimitation in the crotalus triseriatus species group (serpentes: viperidae: crotalinae), with the description of two new species. | members of the crotalus triseriatus species group of montane rattlesnakes are widely distributed across the highlands of mexico and southwestern usa. although five species are currently recognized within the group, species limits remain to be tested. genetic studies suggest that species may be paraphyletic and that at least one cryptic species may be present. we generate 3,346 base pairs of dna sequence data from seven nuclear loci to test competing models of species delimitation in the c. trise ... | 2014 | 24990060 |
| comparative thermal ecology parameters of the mexican dusky rattlesnake (crotalus triseriatus). | montane habitats exhibit a high degree of thermal heterogeneity, and thus provide considerable thermoregulatory challenges for ectotherms. comparative analyses provide an opportunity to understand how variation in abiotic factors (e.g., operative temperatures, thermal quality) can affect life history traits within species. we studied the thermal ecology of three populations of the rattlesnake crotalus triseriatus inhabiting different volcanoes in the central region of mexico using the hertz et a ... | 2020 | 32888579 |
| antibacterial and hemolytic activity of crotalus triseriatus and crotalus ravus venom. | rattlesnakes have venoms with a complex toxin mixture comprised of polypeptides and proteins. previous studies have shown that some of these polypeptides are of high value for the development of new medical treatments. the aim of the present study is to evaluate, in vitro, the antibacterial and hemolytic activity of crotalus triseriatus and crotalus ravus venoms. a direct field search was conducted to obtain crotalus triseriatus and crotalus ravus venom samples. these were evaluated to determine ... | 2020 | 32054095 |
| cryptic diversity in the mexican highlands: thousands of uce loci help illuminate phylogenetic relationships, species limits and divergence times of montane rattlesnakes (viperidae: crotalus). | with the continued adoption of genome-scale data in evolutionary biology comes the challenge of adequately harnessing the information to make accurate phylogenetic inferences. coalescent-based methods of species tree inference have become common, and concatenation has been shown in simulation to perform well, particularly when levels of incomplete lineage sorting are low. however, simulation conditions are often overly simplistic, leaving empiricists with uncertainty regarding analytical tools. ... | 2019 | 30565862 |
| genetic diversity and structure of crotalus triseriatus, a rattlesnake of central mexico. | the isolated and fragmented populations are highly susceptible to stochastic events, increasing the extinction risk because of the decline in putative adaptive potential and individual fitness. the population has high heterozygosity values and a moderate allelic diversity, the heterozygosity values are higher than in most other crotalus species and snake studies. possibly these high levels of genetic diversity can be related to a large founder size, high effective population size, multiple pater ... | 2018 | 30555061 |