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 […]

POWELL, M.L.*; WATTS, S.A.: Survivor: The Energetics of Crayfish in Burrows Procambarus clarkii (PC) and P. zonangulus (PZ) share overlapping ranges in the southeastern United States. Within this shared range the success of each species varies, possibly related to the ability to survive environmental challenges and extended periods of nutrient deprivation during the summer when […]

COOKE SCHREIBER, S.M.*; JURY, S.; WATSON, W.H.: Seasonal differences in behavioral thermoregulation in the lobster, Homarus americanus. Lobsters in the Great Bay estuary (NH) undergo a seasonal migration, possibly cued by changes in water temperature. Previous work on their thermal preference indicated that lobsters gravitate toward a final thermal preferendum slightly above normal summer conditions […]

MONTOOTH, K.L.*; CLARK, A.G.; MARDEN, J.H.: Physiological genetics of flight performance in Drosophila melanogaster. Given the high demand that insect flight places on glycolytic metabolism, insect flight performance should be particularly sensitive to the functional effects of allelic and regulatory variation in energy metabolism. However, the contribution of variation in energy metabolism to variation in […]

NICHOLSON, G.S.*; JAMISON, M.; KELLEY, K.M.: Insulin-Regulated Glucose Transport in Muscle of the Goby, Gillichthys mirabilis In the goby, a total pancreatic endocrine isletectomy (Ix) is followed by hyperglycemia and several additional symptoms typical of insulin-dependent diabetes mellitus (IDDM). Insulin treatment of Ix gobies normalizes serum glucose levels, with a significant glucose-lowering effect of the […]

DAVIS, M.C.*; SHUBIN, N.H.; DAESCHLER, E.B.: The evolution of the endochondral and dermal skeleton in fins and limbs The paired appendages of the two major clades of bony fish, actinopterygians and sarcopterygians, are composed of two separate skeletal units: A proximal endochondral skeleton and a more distal dermal skeleton. The relative contribution of these skeletal […]

MADERSON, P.F.A.*; ALIBARDI, L.: Origin and evolution of mammalian integument Maderson’s (1972) model proposed that hairs derived from mechanoreceptive epidermal appendages located between theropsid scales. It argued an initial role in thermo-regulatory behavior because such “protohairs” lacked insulatory properties (IP). Later quantitative changes in developmental fields underlying their form and distribution produced a “protopelage” whose […]

CHIU, C.-H. P.*; WAGNER, G. P.*: Molecular Evolution Across the Fin-Limb Transition Evolutionary innovations in morphological characters are realized through the evolutionary modification of genes controlling the development of the characters. We follow this line of thought and examine the evolution of genes involved in the development of fins and limbs to gain insights into […]