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Evolutionary and environmental effects on thermoregulation among complex lizard communities.
(2002)
A community of ten sympatric lizard species was studied in a mountain canyon in southern Arizona to determine the effect of phylogeny on habitat use and thermoregulation. Habitat use, body temperatures ( Tb) and operative ...
Effects of lipopolysaccharide, antipyrogen, and body condition on the chronopharmacology of fever in Dipsosaurus dorsalis.
(2006)
I examined the effects of two doses (2.5 mg kg-1 and 25 mg kg-1) of a pyrogen (lipopolysaccharide, LPS) independently and in combination with an antipyrogen (acetylsalicylic acid) at two times of injection (noon and midnight) ...
Distribution and occurrence of carnivores in the Oklahoma panhandle.
(2000)
Five carnivore species representing three families were detected sufficiently to permit analysis. Carnivores were, in general, not distributed evenly over regional, landscape and local scales in the panhandle environment. ...
Ecological context and the evolution of mating biases in a freshwater amphipod species complex.
(2007)
Mating traits are among the most extravagant traits found in nature. As with any trait, understanding the diversification of mating traits requires information on both direct and indirect selection acting on the traits and ...
Physical characterization of the ecdysteroid and retinoid X receptor (UpEcR and UpRXR) in the fiddler crab Uca pugilator.
(2003)
Ecdysteroid hormones regulate growth, metamorphic differentiation, vitellogenesis, and oogenesis in insects. In crustaceans, molt, limb regeneration, and reproduction are closely related to ecdysteroid titers. In the fiddler ...
Privation and uncertainty in the small nursery of Peruvian laughing frogs: Larval ecology shapes the parental mating system.
(2002)
To determine how ecological factors of both offspring and adults can influence the adult mating system, I studied the parental care and mating behavior of the laughing frog, Osteocephalus planiceps. This species uses the ...
Sexual selection in a livebearing fish with a coercive mating system (western mosquitofish, Gambusia affinis).
(2006)
The livebearing fishes of the genus Gambusia are quickly becoming a model system to test alternative mechanisms of sexual selection in the form of coercive mating. I investigated effects of male and female body size, and ...
Ontogeny of fear: Influence of corticosterone.
(2005)
A strong attachment to the caregiver is critical for survival in altricial species, including humans. While some behavioral aspects of attachment have been characterized, its neurobiology has only recently received attention. ...
Thermoregulation of the box turtles Terrapene carolina and Terrapene ornata.
(2001)
Terrapene ornata and T. carolina are closely related box turtles that live in different habitats: grasslands and desert edges, and forested areas, respectively. Considering these species' habitat selection, I predicted ...
Correlates of extra-pair paternity and the effects of ectoparasites on nestling growth, parental provisioning and reproductive success in the house sparrow.
(2000)
In addition, I looked at another aspect of the reproductive biology of the House Sparrow, the effects of ectoparasites on nestling growth, parental provisioning and reproductive success. To determine whether Pellonyssus ...