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Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
Novel Habitat Causes A Shift To Diurnal Activity In A Nocturnal Species, J. Sean Doody, Colin R. Mchenry, David Rhind, Simon Clulow
Novel Habitat Causes A Shift To Diurnal Activity In A Nocturnal Species, J. Sean Doody, Colin R. Mchenry, David Rhind, Simon Clulow
USF St. Petersburg campus Faculty Publications
Plastic responses may allow individuals to survive and reproduce in novel environments, and can facilitate the establishment of viable populations. But can novel environments reveal plasticity by causing a shift in a behavior as fundamental and conspicuous as daily activity? We studied daily activity times near the invasion front of the cane toad (Rhinella marina), an invasive species that has colonized much of northern Australia. Cane toads in Australia are nocturnal, probably because diurnal activity would subject them to intolerably hot and dry conditions in the tropical savannah during the dry season. Our study can demonstrate, however, that upon reaching …
Claw Morphometrics In Monitor Lizards: Variable Substrate And Habitat Use Correlate To Shape Diversity Within A Predator Guild, Domenic C. D'Amore, Simon Clulow, J. Sean Doody, David Rhind, Colin R. Mchenry
Claw Morphometrics In Monitor Lizards: Variable Substrate And Habitat Use Correlate To Shape Diversity Within A Predator Guild, Domenic C. D'Amore, Simon Clulow, J. Sean Doody, David Rhind, Colin R. Mchenry
USF St. Petersburg campus Faculty Publications
Numerous studies investigate morphology in the context of habitat, and lizards have received particular attention. Substrate usage is often reflected in the morphology of characters associated with locomotion, and, as a result, claws have become well-studied ecomorphological traits linking the two. The Kimberley predator guild of Western Australia consists of 10 sympatric varanid species. The purpose of this study was to quantify claw size and shape in the guild using geometric morphometrics, and determine whether these features correlated with substrate use and habitat. Each species was assigned a Habitat/substrate group based on the substrate their claws interact with in their …
The Dry Season Shuffle: Gorges Provide Refugia For Animal Communities In Tropical Savannah Ecosystems, J. Sean Doody, Simon Clulow, Geoff Kay, Domenic D'Amore, David Rhind
The Dry Season Shuffle: Gorges Provide Refugia For Animal Communities In Tropical Savannah Ecosystems, J. Sean Doody, Simon Clulow, Geoff Kay, Domenic D'Amore, David Rhind
USF St. Petersburg campus Faculty Publications
In the wet-dry tropics, animal species face the major challenges of acquiring food, water or shelter during an extended dry season. Although large and conspicuous animals such as ungulates and waterfowl migrate to wetter areas during this time, little is known of how smaller and more cryptic animal species with less mobility meet these challenges. We fenced off the entire entrance of a gorge in the Australian tropical savanna, offering the unique opportunity to determine the composition and seasonal movement patterns of the small vertebrate community. The 1.7 km-long fence was converted to a trapline that was deployed for 18-21 …
Conceptual Model For Thermal Limits On The Distribution Of Reptiles, J. Sean Doody, Jennifer A. Moore
Conceptual Model For Thermal Limits On The Distribution Of Reptiles, J. Sean Doody, Jennifer A. Moore
USF St. Petersburg campus Faculty Publications
Recent climate change has re-invigorated scientific interest in the dynamics of geographic distributions of organisms. Climate responses and their biogeographical ramifications can be predicted indirectly by studying variation in fitness-related traits across environmental gradients in wide-ranging species. We review evidence for such variation in reptiles. Clinal variation in seasonal timing (onset) of nesting is common but may offer only minor compensation. In contrast, clinal variation in nesting behavior in two wide-ranging species suggests that reptiles can use nest site choice to counter climate differences. We suggest that when range boundaries located at climate extremes are determined by thermal conditions of …