Riehle, M. M.*; Bennett, A.F.; Long, A.D.: Genetic analysis of the adaptation to temperature stress: a role for gene duplications Additional copies of certain genes or gene regions have been implicated previously as instrumental players in organismal adaptation to environmental stresses, especially as a means for gene amplification in microorganisms. Six lines of high temperature […]

Shillington, C.: Energy Metabolism and Thermal Ecology of Male Tarantulas (Araneae: Theraphosidae) Male tarantulas of North America engage in intense mate-searching activity during the mating season. They compete for opportunities to mate and their mating success depends largely on rapid walking. Because they are ectotherms, their biological processes are dependent on environmental temperatures, which influences […]

ROBERTS, S. P.*; FEDER, M.E.; POSLUSZNY, J.A: Developmental and fitness consequences of natural thermal stress and hsp70 copy number in Drosophila melanogaster Natural heat exposure of larval Drosophila melanogaster results in high rates of larval mortality and severe developmental defects in eclosing adults. Transgenic increases in copy number of the gene encoding the major inducible […]

COSTA, D.P.*; GALES, N.J; GOEBEL, M.A.: The Role of Physiology in the Behavior of Diving Mammals Diving animals offer a unique opportunity to study the role physiology in limiting behavior. An important component of the physiological capability of any diving animal is it’s aerobic dive limit (ADL). The ADL has only been measured in a […]

VEZINA, F.*; SALVANTE, K.G.; WILLIAMS, T.D.: The Metabolic Cost of Yolk Precursor Production The metabolic cost of egg production in birds is poorly understood. Previous results with European Starlings ( Sturnus vulgaris) suggested that physiological adjustments, namely production of the yolk precursors, vitellogenin (VTG) and yolk-targeted very-low density lipoprotein (VLDLy), may be responsible for an […]

Ligon, D.B.*; Peterson, C.C.: Physiological Variation in Estivation among Mud Turtles (Kinosternon spp.) Sonoran mud turtles (Kinosternon sonoriense) have long been believed to be obligately aquatic, yet recent evidence suggests that populations in the extreme eastern portion of the species’ range thrive in habitats that experience annual drying. We compared the physiological response to dry […]

ANGILLETTA, M.J.*; LEE, V.; SILVA, A.C.: How Do Embryos Incubated at Higher Temperatures Spend Less Energy During Incubation? In some reptiles, the energetic cost of development remains the same or even decreases with increased incubation temperature. The surprisingly low energy expenditure of embryos at high incubation temperatures may be caused by either of two mechanisms: […]

Lancaster, W.C.*; Ward, S.; Jones, G.; Speakman, J.R.: Energetics of Biosonar Vocalization in Stationary Insectivorous Bats Previous studies show a linkage between flight and production of biosonar calls in bats. Microchiropteran bats also emit a wide variety of calls while at rest including biosonar calls of high intensity in some species. The propensity of bats […]

Odell, J.P.*; Chappell, M.A.: Variation in aerobic capacity within and among “common-garden” populations of Trinidadian guppies (Poecilia reticulata) from different predation regimes. We measured maximal oxygen uptake rates (VO2max) in laboratory-reared F2 and F3 offspring of Trinidadian guppies from four different streams. These streams represent habitats that differ in predation intensity and flow characteristics, and […]

Wilmhoff, C. D.*; McClain, W. R.; Gutzke, W. H. N.: The Effect of Temperature and Stage of Development on Resting Metabolism in an Aquatic Environment Organisms capable of reducing maintenance costs are able to invest a greater amount of energy into growth, body reserves, and/or reproduction. In ectothermic organisms temperature has repeatedly been demonstrated to […]