T
Travis J. Ryan
Researcher at Butler University
Publications - 34
Citations - 2717
Travis J. Ryan is an academic researcher from Butler University. The author has contributed to research in topics: Graptemys geographica & Ambystoma talpoideum. The author has an hindex of 18, co-authored 33 publications receiving 2417 citations. Previous affiliations of Travis J. Ryan include University of Georgia & University of Missouri.
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Journal ArticleDOI
The global decline of reptiles, deja’ vu amphibians
J. Whitfield Gibbon,David E. Scott,Travis J. Ryan,Kurt A. Buhlmann,Tracey D. Tuberville,Brian S. Metts,Judith L. Greene,Tony M. Mills,Yale Leiden,Sean M. Poppy,Christopher T. Winne +10 more
TL;DR: Public attitudes about the need for conservation of reptiles are probably linked to concern about amphibian declines and deformities, and counts of “officially” recognized endangered and threatened species are likely to grossly underestimate the actual number of imperiled s pecies.
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Monitoring herpetofauna in a managed forest landscape: effects of habitat types and census techniques
Travis J. Ryan,Thomas E. Philippi,Yale Leiden,Michael E. Dorcas,T. Bently Wigley,J. Whitfield Gibbons +5 more
TL;DR: In this article, the authors surveyed the herpetofaunal (amphibian and reptile) communities inhabiting five types of habitat on a managed landscape, including bottomland wetlands and isolated upland wetlands.
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Salamander abundance along road edges and within abandoned logging roads in Appalachian forests.
Raymond D. Semlitsch,Travis J. Ryan,Kevin Hamed,Matt Chatfield,Bethany Drehman,Nicole Pekarek,Mike Spath,Angie Watland +7 more
TL;DR: The results show that the effect of roads reached well beyond their boundary and that abandonment or the decommissioning of roads did not reverse detrimental ecological effects; rather, the results indicate that management decisions have significant repercussions for generations to come.
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Intraspecific heterochrony and life history evolution: Decoupling somatic and sexual development in a facultatively paedomorphic salamander
TL;DR: It is concluded that age at maturation is the principal target of selection and that morphological changes are secondary effects, and increased attention to the intimate connection between life history evolution and heterochrony is the most promising route to a better understanding of both.
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Ultrastructure of the reproductive system of the black swamp snake (Seminatrix pygaea): Part I. Evidence for oviducal sperm storage.
David M. Sever,Travis J. Ryan +1 more
TL;DR: Oviducal sperm storage in the viviparous colubrid snake Seminatrix pygaea was studied by light and electron microscopy and sperm were found in the lumen and glands of the posterior uterus and anterior vagina, indicating a recent mating.