BURNETT, Louis E; MILARDO, Christopher S: Effects of Air Exposure in Oysters on the Growth and Metabolism of the Protozoan Oyster Parasite Perkinsus marinus We examined the effects of pH, oxygen, carbon dioxide, and temperature on the metabolism of the Apicomplexan oyster parasite Perkinsus marinus simulating conditions that occur within the tissues of the Eastern […]

CHOE, K*; EVANS, D: Compensation for Hypercapnia by a Euryhaline Elasmobranch in Fresh Water: roles of gills and kidneys In fish, hypercapnia is compensated by increased acid excretion by gills and kidneys, with gills playing a larger role. Because gill acid excretion depends on external sodium, a fish’s ability to regulate pH decreases with salinity. […]

WINSLOW, JL; COOPER, RL; ATWOOD, HL; Univ. of Toronto; Univ. of Kentucky; Univ. of Toronto: Variations of Presynaptic Active Zones and Ca2+ Induced Transmitter Release Presynaptic terminals have synapses which contain multiple active zones (AZs) at which neurotransmitter is released. Freeze fracture micrographs of lobster neuromuscular junction show AZs within growth plateaus and containing intramembraneous […]

CRESPI, EJ; DENVER, RJ; Univ. of Michigan, Ann Arbor: Role of corticotropin-releasing hormone (CRH) in the regulation of food intake in Xenopus laevis In mammals CRH is known to be a regulator of food intake and energy balance. We tested the hypothesis that CRH is involved in the regulation of food intake in amphibians by […]

GREENWOOD, AK; FERNALD, RD; Stanford University: Electrical Properties of Gonadotropin-Releasing Hormone Neurons as a Funtion of Reproductive Status Reproductive capacity is plastic throughout the life of vertebrates on a daily, monthly and yearly basis. In the African cichlid fish Haplochromis burtoni, reproductive ability and the Hypothalamic-Pituitary-Gonadal (HPG) axis are controlled by the social environment. Adult […]

ASAY, M.J.*; BOYD, S.K.; University of Notre Dame; University of Notre Dame: Characterization of the GABAB receptor in Xenopus laevis Gamma-aminobutyric acid (GABA) is a ubiquitous inhibitory neurotransmitter. The metabotropic GABAB receptor acts via K+ and Ca2+ channels as well as adenylate cyclase to inhibit pre- and post-synaptic potentials. Although much information about the GABAB […]

LEMA, S.C.*; NEVITT, G.A.; Univ. of California, Davis: Arginine Vasotocin Modulates Social Behaviors in a Death Valley Pupfish Pupfishes in the Death Valley region inhabit remote pools and streams that have become isolated by the surrounding desert over the past 20,000 years. These aquatic habitats are ecologically diverse, and populations show considerable variation in social […]

HADFIELD, M.G.*; KOEHL, M.A.R.; ZARDUS, J.D.; University of Hawaii, Kewalo Marine Lab; University of California, Berkeley; University of Hawaii, Kewalo Marine Lab: The affect of chemical cues on the adhesion strength of settling invertebrate larvae. Locating and adhering to a suitable substratum at the end of the pelagic larval period is a crucial step in […]

MCALISTER, J.S.*; PODOLSKY, R.D.; Univ. of North Carolina at Chapel Hill; Univ. of North Carolina at Chapel Hill: Testing for costs of phenotypic plasticity during development of Lytechinus variegatus Phenotypic plasticity can increase organismal fitness by altering phenotypic expression in heterogeneous environments. Theory predicts however, that the evolution of optimal plastic phenotypes could be constrained […]

HART, M.W.; Dalhousie Univ.: Reproductive variation and population genetics in marine invertebrates Many larval biologists have become population geneticists in order to study the population genetic consequences of reproductive variation among marine invertebrates. Most studies focus on the effects of dispersal differences on among-population differentiation (as FST or its analogs). We have explored instead the […]