Topic
Hyla wrightorum
About: Hyla wrightorum is a research topic. Over the lifetime, 8 publications have been published within this topic receiving 80 citations.
Papers
TL;DR: It is suggested that theHMCH region may contain larger and more connected breeding populations than previously understood, but the dynamics of this system and the limited geographic extent of the HMCH group justify current concern for the persistence of the species in this region.
Abstract: Population attributes such as diversity, connectivity, and structure are important components of understanding species persistence and vulnerability to extinction. Hyla wrightorum, the Arizona treefrog, is native to the southwestern United States and Mexico, and an isolated group of populations exists in the Huachuca Mountains and Canelo Hills (HMCH) of southeastern Arizona, USA. Due to concerns about declining observations of the species within the isolated HMCH portion of its range, the HMCH group is currently a candidate for federal protection under the U.S. Endangered Species Act. We present results of a genetic study examining population diversity, structure, and connectivity within the HMCH region. We sampled DNA from H. wrightorum larvae and adults from ten distinct locations, 8 of which were breeding sites and 4 of which were previously undescribed localities for the species. We developed and genotyped 17 polymorphic microsatellite loci and quantified genetic diversity, population differentiation, and landscape influences on population genetic structure. We found evidence of larger than expected effective population sizes, significant genetic differentiation between populations, and evidence of distance being the primary driver of genetic structure of populations with some influence of slope and canopy cover. We found little evidence of recent genetic bottlenecks, and individual-based analyses indicate admixture between populations despite significant genetic differentiation. These patterns may indicate that the breeding sites within the Huachuca Mountains constitute a metapopulation. We suggest that the HMCH region may contain larger and more connected breeding populations than previously understood, but the dynamics of this system and the limited geographic extent of the HMCH group justify current concern for the persistence of the species in this region. Efforts to ensure availability of high-quality breeding habitats and control for local threats such as effects of invasive predators may be critical to the persistence of these unique populations of H. wrightorum.
29 citations
TL;DR: Molecular data (allozymes and mtDNA), as well as the advertisement calls, support continued recognition of two species: H. eximia in central-southern Mexico and H. wrightorum in the United States and Mexico.
Abstract: We studied geographic variation in allozymes (22 loci), mitochondrial cytochrome b gene sequences (575 bp), advertisement calls (pulse rate, call duration, and dominant frequency), and snout–vent length among populations of Hyla wrightorum and Hyla eximia in the United States and Mexico. Calls were only available for H. wrightorum, and although populations varied in some advertisement call variables, there was no indication of species level differentiation. Allozyme variation was exhibited among the H. wrightorum populations, but no fixed differences were discovered, and the amount of genetic divergence among populations was small (Dm ≤ 0.0643). Seven mtDNA haplotypes were discovered among the H. wrightorum individuals included in this study. A single haplotype (G) was present in the Huachuca Mountains and was found only in this population restricted to southeast Arizona. Neither the Mogollon Rim nor the Sonora populations were exclusive, with some haplotypes in each being more closely related to...
23 citations
TL;DR: The geographical variation in male advertisement calls of the wide-ranging canyon treefrog, Hyla arenicolor, is surveyed, and large call differences among geographically distant lineages that had been characterized by a recent phylogeographical study are found.
Abstract: We surveyed the geographical variation in male advertisement calls of the wide-ranging canyon treefrog, Hyla arenicolor, and found large call differences among geographically distant lineages that had been characterized by a recent phylogeographical study. To test whether these call differences were biologically relevant and could allow reproductive isolation of different lineages should they come into secondary contact, we assessed female preference in a lineage occurring in southern Utah and north-western Arizona, USA. These females exhibited a strong preference for their own lineage's call type over the calls of two Mexican lineages, but not over the calls from the geographically nearest lineage. We also identified traits that female frogs probably use to discriminate between lineage-specific advertisement calls. Our behavioural results, together with recent molecular estimates of phylogenetic relationships among lineages, will guide future work addressing the evolutionary forces that have led to this biologically significant variation in male sexual signals. © 2012 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, ••, ••–••.
15 citations
TL;DR: The gastrointestinal tracts, lungs, and urinary bladders of 3 species of treefrogs from Arizona were examined for helminths and the highest prevalence and greatest mean intensity was recorded for Cosmocercella haberi in H. arenicolor.
Abstract: The gastrointestinal tracts, lungs, and urinary bladders of 3 species of treefrogs from Arizona were examined for helminths. Hyla arenicolor (n = 30) and Hyla wrightorum (n = 53) were infected by Cylindrotaenia americana, Cosmocercella haberi, and larvae of Physaloptera sp.; Pseudacris triseriata (n = 20) harbored Falcaustra catesbeianae. The highest prevalence (33%) and greatest mean intensity (112.2) was recorded for Cosmocercella haberi in H. arenicolor. The helminth fauna of these treefrogs is depauperate and consists of different species than those of other Arizona amphibians.
15 citations
Journal Article•
TL;DR: An analysis of advertisement call variation in a population of the Arizona tree frog from central Arizona and the hypothesis that advertisement call parameters (frequency, pulse rate, and duration) are predictably related to male snout-vent length is tested.
Abstract: —Advertisement call variation and male mating success was investigated in a population of the Arizona tree frog, Hyla wrightorum, from central Arizona. Dominant frequency of advertisement calls was significantly correlated (negatively) with male snout-vent length. Males found mating were not significantly larger than nonmating males, nor was there a significant correlation between sizes of males and females found in ample.xus. These results are discussed in relation to Renaud's (1977) work with H. tiri^,htorum and in light of recent work with anurans in general. The Arizona tree frog {Hyla wrightonwi) is primarily restricted to the Petran Montane Conifer Forest Biome (Brown and Lowe 1980) along the Mogollon Rim in central Arizona and extreme west central New Mexico, and in the Hnachuca Mountains of southern Arizona (Stebbins 1966, Renaud 1977). Other than discussions of taxonomy, to date little has been published concerning this anuran. In his description Taylor (1938) placed H. wrightorum in the H. eximia species group; subsequently a number of authors have considered H. wrightorum as a subspecies of H. regilla (Jameson et al. 1966, Jameson and Richmond 1971) or as conspecific with H. eximia (Duellman 1970). However, Renaud (1977) documented that H. eximia, H. regilla, and H. wrightorum are distinct in their mori3hology (primarily size) and advertisement calls, and in light of their allopatric distributions warrant recognition as full species. Unfortunately Renaud's work remains unpublished and, hence, largely overlooked. Here I present an analysis of advertisement call variation in a population of//, wrightorum from central Arizona. I compare my results with those of Renaud (1977) and hope to draw attention to his valuable work. I also examine the relationship between male size and mating success and test the hypothesis that advertisement call parameters (frequency, pulse rate, and duration) are predictably related to male snout-vent
9 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2012 | 1 |
| 2004 | 1 |
| 1996 | 1 |
| 1986 | 1 |
| 1961 | 1 |