MCDONALD, M. Danielle; WALSH, Patrick J.; Rosenstiel School and Marine and Atmospheric Science, University of Miami; Rosenstiel School of Marine and Atmospheric Science, University of Miami: The role of glucocorticoids and 5-HT2-like receptors in branchial urea excretion of the gulf toadfish, Opsanus beta The gulf toadfish, Opsanus beta, has a unique pulsatile urea excretion mechanism […]

GROSELL, M.; TAYLOR, J.; University of Miami: Intestinal bicarbonate secretion is a novel aspect of marine teleost osmoregulation Drinking and intestinal water absorption forms a critical component of marine teleost fish osmoregulation. Ingested seawater is desalinized in the esophagus prior to entering the intestine where active absorption of Na+ and Cl– drives water absorption. In […]

YANCEY, P.H.*; SAMEROTTE, A.L.; BRAND, G.L.; DRAZEN, J.C.; Whitman College; Whitman College; Whitman College; University of Hawai’i: Increasing contents of TMAO with depth within species as well as among species of teleost fish Marine teleost fish are generally classified as hypo-osmotic osmoregulators, with internal osmotic pressures of about 300-400 mOsm (compared to seawater at about […]

TEMPLE, J.G.*; LAITALA, L.; Univ. of Mary Washington; Univ. of Mary Washington: Uptake and Metabolism of orally administered serotonin in the plasma of toad-eating and non-toad-eating snakes American species of toads produce skin secretions that induce severe physiological effects when ingested by some potential predators including black rat snakes (Elaphe o. obsoleta). However, eastern hognose […]

CAVIEDES-VIDAL, E.; CHEDIACK, J.G.; CRUZ-NETO, A.P.; KARASOV, W.H.*; Universidad Nacional de San Luis; Universidad Nacional de San Luis; Universidade Estadual Paulista; University of Wisconsin, Madison: Sugar absorption in bats. Are they mammals or birds? Absorption by the paracellular pathway is a declining function of molecule size, probably due to sieving in the tight junction between […]

MCWHORTER, T.J.; KARASOV, W.H.; GREEN, A.K.; Univ. of Wisconsin, Madison: How the American robin absorbs glucose American robins (Turdus migratorius) assimilated 92 � 2 % of D-glucose and 92 � 14% of L-glucose, the stereioisomer not actively transported. Does this finding, similar to that found in other birds with diverse diet and taxonomic associations, confirm […]

GIBBS, V.K.*; WATTS, S.A.; Univ. of Alabama at Birmingham: Exposure temperature affects biochemical and cellular composition of the gonad in the sea urchin Lytechinus variegatus (Echinodermata: Echinoidea) Temperature is one of the most important proximate factors affecting the biology of ectothermal organisms. In Lytechinus variegatus, water temperature affects the reproductive cycle in field populations, suggesting […]

HALEY, S.H.; LAMB, J.G.; DEARING, M.D.; University of Utah, Salt Lake City: Detoxification of plant secondary compounds in creosote (Larrea tridentata) by a woodrat herbivore Neotoma lepida Dietary specialization in mammalian herbivores is extremely rare. Existing mammalian specialists are believed to express a unique pattern of induced detoxification enzymes that permit elimination of the large […]

SCHAAD, E. W.*; GOBALET, K. W.; California State University, Bakersfield; California State University, Bakersfield: What is the function of the caudal opening of the posterior myodome of scombrid fishes? The posterior myodome of actinopterygian fishes is a prominent recess of the neurocranium ventral to the braincase. Its anterior opening is continuous with the orbit and […]

DAVIS, J.R.*; DENARDO, D.F.; Arizona State Univ.: The contribution of urinary bladder water to hydrostasis in the Gila Monster (Heloderma suspectum) The infrequent, yet predictable seasonal rainfall of the Sonoran Desert results in feast or famine hydric conditions for many desert species. As a result, the hydration state of some Sonoran Desert organisms may fluctuate […]