| the importance of comparative phylogeography in diagnosing introduced species: a lesson from the seal salamander, desmognathus monticola. | in most regions of the world human influences on the distribution of flora and fauna predate complete biotic surveys. in some cases this challenges our ability to discriminate native from introduced species. this distinction is particularly critical for isolated populations, because relicts of native species may need to be conserved, whereas introduced species may require immediate eradication. recently an isolated population of seal salamanders, desmognathus monticola, was discovered on the oza ... | 2007 | 17825102 |
| experimental infection of north american plethodontid salamanders with the fungus batrachochytrium dendrobatidis. | the presence in the southeastern usa of batrachochytrium dendrobatidis, a fungal pathogen of amphibians, is a potential threat to the diverse salamander assemblages in the region. in this study, we tested the susceptibility of plethodontid salamanders to infection with b. dendrobatidis. we experimentally infected one terrestrial species (plethodon metcalfi) and one stream-dwelling species (desmognathus monticola). mortality of p. metcalfi due to b. dendrobatidis infection was 41.7% and was highe ... | 2009 | 19419001 |
| variable infection of stream salamanders in the southern appalachians by the trematode metagonimoides oregonensis (family: heterophyidae). | many factors contribute to parasites varying in host specificity and distribution among potential hosts. metagonimoides oregonensis is a digenetic trematode that uses stream-dwelling plethodontid salamanders as second intermediate hosts in the eastern us. we completed a field survey to identify which stream salamander species, at a regional level, are most likely to be important for transmission to raccoon definitive hosts. we surveyed six plethodontid species (n = 289 salamanders) from 23 appal ... | 2015 | 26026670 |
| the influence of ecology and genetics on behavioral variation in salamander populations across the eastern continental divide. | understanding the unique contributions of ecology and history to the distribution of species within communities requires an integrative approach. the eastern continental divide in southwestern virginia separates river drainages that differ in species composition: the more aquatic, predatory desmognathus quadramaculatus is present only in the new river drainage (which drains to the gulf of mexico), while desmognathus monticola is present in both the new river drainage and the james river drainage ... | 2004 | 15278844 |
| time courses of thermal acclimation for critical thermal minima in the salamanders desmognathus quadramaculatus, desmognathus monticola, desmognathus ochrophaeus, and plethodon jordani. | 1. we examined the time courses of thermal acclimation for critical thermal minima (ctmin) in the salamanders desmognathus quadramaculatus, d. monticola, d. ochrophaeus, and plethodon jordani. 2. d. quadramaculatus showed no annual differences in their time courses, but we noted seasonal differences in the ctmin with these salamanders having lower ctmin in the spring. 3. gain in ctmin (25 degrees c to 5 degrees c transfer) was faster than its corresponding loss (5 degrees c to 25 degrees c trans ... | 1987 | 2887388 |
| habitat selection by two streamside plethodontid salamanders. | a series of experiments was conducted to test the hypothesis that habitat selection by the salamanders desmognathus monticola and desmognathus quadramaculatus is influenced differently by interspecific interference than by intraspecific interference. individuals of neither species were influenced differently by the presence of heterospecifics than by the presence of conspecifics in their activity away from cover sites, in selection of different substrate moisture levels, in selection of differen ... | 1985 | 28310876 |
| influence of intraspecific density and cover on home range of a plethodontid salamander. | hypotheses about the influence of intraspecific density and available cover on home range size (=mean activity radius) of a plethodontid salamander (desmognathus monticola) were tested by field experimentation from june 1980 to october 1981. a second order mountain stream in southwestern north carolina was marked into five sections (two control and three experimental) and three replicated treatments were performed: treatment i, low and high density additions of d. monticola; treatment ii, additi ... | 1985 | 28310870 |
| effect of parathyroidectomy on plasma calcium levels in the seal salamander, desmognathus monticola. | the parathyroid glands of desmognathus monticola are located in the subdermal connective tissue of the neck. although they are smaller than previously described urodele parathyroid glands, their histological structure is similar. parathyroidectomy caused a decrease in plasma calcium concentrations within 4 days following the operation. by days 12 and 21, however, the plasma calcium levels of parathyroidectomized animals were not significantly different from those of sham-operated animals. thus, ... | 1983 | 6884758 |