Daniel F Hughes

Daniel F Hughes
Coe College · Biology

PhD

About

57
Publications
22,825
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216
Citations
Introduction
I am an Assistant Professor of Biology at Coe College. I study reptiles and amphibians, with an emphasis on species diversity, ecology, reproductive biology, natural history, and evolution.

Publications

Publications (57)
Article
Full-text available
Historically, an understanding of viviparity and its evolution in Old World chameleons (Chamaeleonidae) has lagged behind that of other squamate families. Not only is reproductive information scarce or entirely absent for most chameleon species, but the literature reveals no consensus as to the frequency and ecological circumstances under which cha...
Article
Full-text available
For this study, we examined a large sample of museum specimens to ascertain the reproductive ecology of Rhinophrynus dorsalis (Mexican Burrowing Toad) in México. Seasonal aboveground activity was highest during May to August, which tracks monthly rainfall patterns across the region. Contrary to previous assertions, mean body sizes were similar betw...
Article
Full-text available
Agricultural co-management aims to promote environmental sustainability while maintaining food-safety standards. Amphibians, especially treefrogs, are known to enter fields of fresh produce intended for human consumption, which raises concerns for food safety and quality. We evaluated the effects of modifications to reduce the scalability of exclus...
Article
The geographically widespread species Afrixalus laevis (Anura: Hyperoliidae) currently has a disjunct distribution in western Central Africa (Cameroon, Equatorial Guinea, Gabon, and possibly adjacent countries) and the area in and near the Albertine Rift in eastern Democratic Republic of the Congo and neighboring countries. At least two herpetologi...
Article
Ophidiomyces ophidiicola is an emerging fungal pathogen associated with infections in snakes across North America. Although documented in Pennsylvania, O. ophidiicola has not been found at the Powdermill Nature Reserve (PNR) in southwestern Pennsylvania, where the snake assemblage has been studied since 2002 and several species have recently declin...
Article
Full-text available
Multi-year studies of syntopic species provide a spatiotemporal framework for comparing their demographic responses to the same environmental conditions. We used data derived from 15 years of sampling at an artificial pond matrix in southwestern Pennsylvania to investigate the survival, growth, and ages of Midland Painted Turtles (Chrysemys picta m...
Article
We studied ontogenetic changes in habitat use and seasonal activity patterns in a population of Nile crocodiles (Crocodylus niloticus) inhabiting the Lake Albert Delta Wetland System, a Ramsar Site of international importance in Murchison Falls National Park of western Uganda. From monthly surveys of five transects during October 2017 to September...
Article
Full-text available
We examined selected life history traits from 100 specimens of the Green Treefrog, Hyla cinerea, collected during 1938-2012 from mostly coastal counties in Virginia, USA. Individuals were collected during January-October. The highest numbers of males and females were collected in May with most juveniles in June. Testes were at their peak dimensions...
Article
Full-text available
1. The area of the Murchison Falls-Albert Delta is among the most important for conservation in East Africa due to the high species richness, and the presence of several endemic species of conservation concern. 2. Here, we report a study on the diversity patterns and community structure of the herpetofauna of this area. 3. Field studies were conduc...
Article
Full-text available
Community ecology patterns are poorly understood in Uganda, as well as in the rest of East Africa. Therefore, the aim of the study was to determine the patterns of diversity and distribution of reptiles and amphibians in selected wetland sites in the greater Nabugabo–Ramsar area, Uganda with contributions to the understanding of their ecology and c...
Article
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Physiological states in snakes, such as digestion, gestation, and ecdysis, have been associated with different body temperatures (BT), yet few studies have examined these associations in a comparative context for wild-caught animals. We collected body and environmental temperatures for 2 natricine snake species—Thamnophis sirtalis (Common Gartersna...
Article
Full-text available
Prepackaged leafy green vegetables represent one of the fastest growing segments of the fresh-produce industry in the United States. Several steps in the production process have been mechanized to meet the downstream demand for prebagged lettuces. The growth in this market, however, has come with drawbacks, and chief among them are consumers findin...
Article
Full-text available
Atractaspidines are poorly studied, fossorial snakes that are found throughout Africa and western Asia, including the Middle East. We employed concatenated gene-tree analyses and divergence dating approaches to investigate evolutionary relationships and biogeographic patterns of atractaspidines with a multi-locus data set consisting of three mitoch...
Data
Settings for high-resolution CT scans and DOI numbers for supporting files on the Morphosource website, in Microsoft Excel format. (XLSX)
Article
Full-text available
African snake-eaters of the genus Polemon are cryptic, fossorial snakes that mainly inhabit the forests of central, eastern, and western Africa. Molecular results from a previous study demonstrated that Polemon christyi is not monophyletic-two distinct lineages were recovered from Uganda (the type locality) and southeastern Democratic Republic of t...
Article
Jackson's Forest Lizard (Adolfus jacksoni) is widespread throughout the highlands of the Albertine Rift, southern Uganda, western and central Kenya, and northern Tanzania. To understand the population genetics and phylogenetic relationships of this widespread taxon, we sequenced two mitochondrial (16S and cyt b) and two nuclear (c-mos and RAG1) gen...
Article
Full-text available
We ascertained various life-history traits from an examination of 310 museum specimens of the Rio Grande leopard frog (Lithobates berlandieri) collected during 1907–2016 from Texas, USA. Lithobates berlandieri was captured during every month of the year except November, and adults were most frequently encountered during January–September, with a di...
Article
Full-text available
We provide data derived from nearly four months of field surveys on the distribution, natural history, and habitat of the poorly known Sudanese Unicorn Chameleon (Trioceros conirostratus) from Northern Region, Uganda, Africa. Our study also provides the first description of the reproductive mode and an estimate of the litter size for T. conirostrat...
Preprint
Full-text available
We ascertained various life-history traits from an examination of 310 museum specimens of the Rio Grande leopard frog (Lithobates berlandieri Baird, 1859) collected during 1907-2016 from Texas, USA. Lithobates berlandieri was captured during every month of the year except November, and adults were most frequently encountered during January-Septembe...
Preprint
Full-text available
Geographically widespread species that occupy many thermal environments provide testable models for understanding the evolution of life-history responses to latitude, yet studies that draw range-wide conclusions using descriptive data from populations in the core of a species distribution can overlook meaningful inter-population variation. The phry...
Article
Several biogeographic barriers in the Central African highlands have reduced gene flow among populations of many terrestrial species in predictable ways. Yet, a comprehensive understanding of mechanisms underlying species divergence in the Afrotropics can be obscured by unrecognized levels of cryptic diversity, particularly in widespread species. W...
Article
Full-text available
Biotic declines in natural environments are increasing globally, and optimizing management strategies in protected areas may be the best approach to mitigate losses. Researchers should emphasize population-level responses to habitat modification practices in protected areas to ensure portions of the remaining biotas are successfully managed for the...
Article
Full-text available
We studied nesting activities and measured afternoon nest-temperatures of the midland painted turtle (Chrysemys picta marginata), common snapping turtle (Chelydra serpentina serpentina), and eastern box turtle (Terrapene carolina carolina) from a wetland matrix during May–November 2013 at the Powdermill Nature Reserve in western Pennsylvania, USA....
Article
Full-text available
The Eastern Mud Turtle, Kinosternon subrubrum (Family Kinosternidae), is a small (carapace length 85 to 120 mm) polytypic species of the eastern and central United States. All three historically recognized subspecies (K. s. subrubrum, K. s. steindachneri, and K. s. hippocrepis) are semi-aquatic turtles that inhabit much of the U.S. Atlantic and Gul...
Article
Full-text available
An examination of 750 museum specimens of the Southern Leopard Frog (Lithobates sphenocephalus) collected during 1938‐1989 from eastern Virginia (USA) provided comparative life‐history data from the northeastern portion of this species geographic range. Individuals were collected in all months except December. Testis size was largest and incidence...
Article
Full-text available
The Albertine Rift (AR) is a centre for vertebrate endemism in Central Africa, yet the mechanisms underlying line-age diversification of the region's fauna remain unresolved. We generated a multilocus molecular phylogeny consisting of two mitochondrial (16S and ND2) and one nuclear (RAG1) gene to reconstruct relationships and examine spatiotemporal...
Article
Full-text available
West Nile virus (WNV) has a complex eco-epidemiology with birds acting as reservoirs and hosts for the virus. Less well understood is the role of reptiles, especially in wild populations. The goal of our study was to determine whether a wild population of snakes in Pennsylvania harbored WNV. Six species of snakes were orally sampled in the summer o...
Article
Full-text available
Biodiversity hotspots, which harbor more endemic species than elsewhere on Earth, are increasingly threatened. There is a need to accelerate collection efforts in these regions before threatened or endangered species become extinct. The diverse geographical, ecological, genetic, morphological, and behavioral data generated from the on-site collecti...
Data
The raw scored data obtained from the tissue evaluations of three independent raters, in Microsoft Excel format. (XLSX)
Data
Original R script for our statistical analysis, in Microsoft Word format. (DOCX)
Article
Full-text available
We examined turtle populations occupying eight artificial ponds in Westmoreland County, southwestern Pennsylvania, USA. Beginning in 2005, we used sardine-baited hoop-nets to trap turtles for eight consecutive years at one pond. In 2013, we expanded sampling to include seven additional ponds near the primary study pond. We deployed and checked trap...
Article
Full-text available
We used nightly surveys to monitor the status of building-dwelling gecko species on the southern Caribbean island, Curacao. Two gecko species were detected in 10 counts across five nights from 18 sites. We recorded the nonnative Wood Slave, Hemidactylus mabouia (81%, 369/455 observations), native Dutch Leaf-Toed Gecko, Phyllodactylus martini (11%,...

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Projects

Projects (4)
Project
Research projects focused on characterizing the ecology, reproductive biology, and natural history of reptiles and amphibians in Pennsylvania.
Project
Long-term research project on the demography and population ecology of turtles at the Powdermill Nature Reserve in Pennsylvania.