| multimodal communication, mismatched messages and the effects of turbidity on the antipredator behavior of the barton springs salamander, eurycea sosorum. | prey may use multiple sensory channels to detect predators, whose cues may differ in altered sensory environments, such as turbid conditions. depending on the environment, prey may use cues in an additive/complementary manner or in a compensatory manner. first, to determine whether the purely aquatic barton springs salamander, eurycea sosorum, show an antipredator response to visual cues, we examined their activity when exposed to either visual cues of a predatory fish (lepomis cyanellus) or a n ... | 2016 | 27370360 |
| application of stable isotope analysis to study temporal changes in foraging ecology in a highly endangered amphibian. | understanding dietary trends for endangered species may be essential to assessing the effects of ecological disturbances such as habitat modification, species introductions or global climate change. documenting temporal variation in prey selection may also be crucial for understanding population dynamics. however, the rarity, secretive behaviours and obscure microhabitats of some endangered species can make direct foraging observations difficult or impossible. furthermore, the lethality or invas ... | 2013 | 23341920 |
| effects of nitrogenous wastes on survival of the barton springs salamander (eurycea sosorum). | the objective of our study was to determine the acute toxicity of 3 common aquatic nitrogenous toxicants to the federally endangered barton springs salamander (eurycea sosorum). based on our findings, the 96-h median lethal concentrations (96-h lc50) for un-ionized ammonia-n, nitrite-n, and nitrate-n to e. sosorum are 2.0 ± 0.32, 31.7 ± 4.02, and 968.5 ± 150.6 mg/l, respectively. these results establish a benchmark for the tolerance of plethodontid salamanders to these toxicants and indicate tha ... | 2017 | 28543305 |
| density-dependent and density-independent drivers of population change in barton springs salamanders. | understanding population change is essential for conservation of imperiled species, such as amphibians. worldwide amphibian declines have provided an impetus for investigating their population dynamics, which can involve both extrinsic (density-independent) and intrinsic (density-dependent) drivers acting differentially across multiple life stages or age classes. in this study, we examined the population dynamics of the endangered barton springs salamander (eurycea sosorum) using data from a lon ... | 2018 | 29938103 |
| a vavraia-like microsporidium as the cause of deadly infection in threatened and endangered eurycea salamanders in the united states. | eurycea sosorum (barton springs salamander) and eurycea nana (san macros salamander) are listed as endangered and threatened species, respectively, by the u.s. fish and wildlife service (usfws) with habitats restricted to small regions near austin, texas, usa. the conservation efforts with the eurycea salamanders at the captive breeding program in san marcos aquatic resources center (smarc), a usfws facility, have seen an unexpected and increased mortality rate over the past few years. the clini ... | 2019 | 30871588 |