DARVEAU, C.-A.*; SUAREZ, R. K.; HOCHACHKA, P. W.: Evolution of energy metabolism: The case of hovering insects Hovering insects possess the highest mass-specific metabolic rate ever measured and are therefore an excellent model to study the evolution of metabolic pathways involved in energy production. We conducted a survey of the maximal activity of several enzymes […]

GEIS, A.*; WIBBELS, T.; M�RQUEZ-M, R.; GARDU-O-D, M.; BURCHFIELD, P.; PE-A-V, J.: Evaluation of hatchling Kemp’s ridley sex ratios using nest incubation temperatures at Rancho Nuevo, Mexico The Kemp’s ridley sea turtle, Lepidochelys kempi, is the most endangered sea turtle in the world. It possesses temperature-dependent sex determination (TSD) in which the incubation temperature of […]

PRESTON, R.L.*; Preston, E.J.D.; Middaugh, D.R.: Enzymatic Racemization of Amino Acids in Marine Invertebrate Tissues Previously we showed that D-amino acids are present in the cellular free amino acid pools of diverse groups of marine invertebrates. Using a coupled enzyme assay employing D-amino acid oxidase or chiral HPLC, we surveyed over 130 species of marine […]

Chang, M.H*; Chediack, J.G.; Caviedes-Vidal, E.; Karasov, W.H.: Enhanced passive absorption in the presence of luminal nutrients in house sparrows We previously demonstrated in house sparrows substantial absorption in vivo of L-glucose, the stereoisomer of D-glucose that does not interact with the intestine’s D-glucose transporter. The mechanism, as first proposed by Pappenheimer and coworkers in […]

BIRCHARD, G.F.*; DAUGHERTY, C.H.: Energetic of Development in the Fairy Prion (Pachyptila turtur) Embryos of the Procellariiformes are noted for their very long incubation times. The limited data available on embryos from this group indicates that these long development times are associated with increased costs of development. We measured the oxygen consumption rate of developing […]

BUDD, S.J.*; ROER, R.D.; KINSEY, S.T.: Energetic cost of osmoregulation as a function of size and salinity in Callinectes sapidus In order to determine the energetic cost of osmoregulation in C. sapidus over a range of salinities, adult and juvenile crabs were acclimated to either sea water (1000 mOsm) or dilute sea water (150 mOsm). […]

Bloom, A. J.; Smart, D. R.; Nguyen, D. T.: Elevated Carbon Dioxide Concentrations Inhibit Nitrate Assimilation in Wheat Shoots Fluxes of CO2 and O2 from the shoots of wheat (Triticum aestivum) demonstrated that exposure to elevated CO2 concentrations strongly inhibited shoot NO3– assimilation. Accordingly, elevated CO2 concentrations enhanced shoot growth of wheat plants receiving NO3– […]

PATE, S.E.*; CHECK, J.F.; ROER, R.D.; MOUSTAKAS, C.T.: Effects of size and salinity on sodium and water permeability in Callinectes sapidus In order to understand the magnitude of the osmoregulatory stress imposed upon juvenile blue crabs in low salinities, the water and sodium permeabilities of these crabs were measured after acclimation to either sea water […]

NOREN, D.P.*; WILLIAMS, T.M.: Effects of Environmental Regime and Body Condition on Resting Metabolic Rates in Northern Elephant Seal Pups: Does RMR Measured in Ambient Air Represent True RMR? Northern elephant seal pups (Mirounga angustirostris) are weaned at body masses that are 30 – 50% lipid. Due to the wide range of body compositions at […]

LI, T.*; ROER, R.D.: Effect of salinity on gill Na+, K+-ATPase activity in juvenile and adult Callinectes sapidus Juvenile and adult blue crabs, Callinectes sapidus, were collected from Cape Fear River and acclimated in the laboratory for two weeks to either sea water (1050 mOsm) or dilute sea water (150 mOsm). Gills were removed from […]