REITZEL, A.M.*; SULLIVAN, J.C.; FINNERTY, J.R.; Boston Univ.: Metamorphosis in the Life History of a Parasitic Sea Anemone, Edwardsiella lineata Larvae of the sea anemone Edwardsiella lineata selectively parasitize the ctenophore Mnemiopsis leidyi. Our observations have shown that a parasite excised from the host will differentiate into a larva that can undergo either of two […]

MCCOY, Krista A*; AMICK, Alison M; University of Florida; University of Florida: Metamorphosis and reproductive growth and development Plasticity in size at and time to metamorphosis in amphibians is well documented. For example, tadpoles developing in temporary ponds will quickly metamorphose in response to decreasing water levels resulting in small size at metamorphosis. Thus, strong […]

EDWARDS, T.M.*; MOORE, B.C.; GUILLETTE, L.J.; Environmental Health Sciences/Univ. of FL; University of Florida; University of Florida: Metamorphic Sex Change: Evolutionary Insight for Endocrine Disruption Studies Metamorphosis is marked by developmental bipotentiality. Classical metamorphosis allows an individual to express more than one phenotype in its lifetime, without a change in genotype. Consider Lythrypnus dalli, the […]

MILLER, MF*; OKADA, R; ITO, Y; DE GROEF, B; YAMAMOTO, K; DENVER, RJ; KIKUYAMA, S; University of Michigan, Ann Arbor; Waseda University, Tokyo ; Waseda University, Tokyo ; Catholic University of Leuven, Leuven; Waseda University, Tokyo ; University of Michigan, Ann Arbor; Waseda University, Tokyo : Involvement of the corticotropin-releasing factor (CRF) type 2 receptor […]

CRESPI, Erica J*; DENVER, Robert J; Univ. of Michigan, Ann Arbor: Conserved and novel functions of leptin in the South African clawed frog (Xenopus laevis) Leptin, the protein product of the obese (ob) gene, is a type-I cytokine hormone secreted by fat that is integral to food intake regulation and influences almost every physiological system […]

Meeting Abstract 65.8  Jan. 7  Voluntary exercise and aerobic performance in several small mammals CHAPPELL, MA; Univ. of California, Riverside mark.chappell@ucr.edu The upper limit of sustainable metabolic power output is set by maximum oxygen consumption (VO2max). Physiologists have considerable data on VO2max from a variety of species, but little is known about how frequently animals approach VO2max […]

Meeting Abstract 65.1  Jan. 7  Unidirectional flow in the lungs of archosaurs FARMER, CG; Utah Artificial Heart Institute farmer@biology.utah.edu “A satisfactory answer has not been found to the question of the benefit of unidirectional air flow in bird lungs” (Meyer et al., 1981). Studies on pulmonary air flow of the sister group to birds, crocodilians, may provide […]

Meeting Abstract 65.2  Jan. 7  Specializations for gill rigidity in ram ventilating teleosts WEGNER, N.C.*; SEPULVEDA, C.A.; GRAHAM, J.B.; Scripps Institution of Oceanography; Pfleger Institute of Environmental Research; Scripps Institution of Oceanography nwegner@ucsd.edu For ram-gill ventilators such as tunas (family Scombridae) and marlins (family Istiophoridae), a rigid gill structure prevents filament and lamellar deformation by the fast, […]

Meeting Abstract 65.7  Jan. 7  Scaling of aerobic metabolism in epipelagic squid TRUEBLOOD, Lloyd A.*; ROSA, Rui A.; BIRDEN, Leanne E.; SIEBEL, Brad A.; University of Rhode Island; University of Rhode Island; University of Rhode Island; University of Rhode Island truell@mail.uri.edu Mass-specific rates of metabolism (B) typically decline with increasing body mass (M) according to B= b0Mb, […]

Meeting Abstract 65.3  Jan. 7  Gas exchange patterns in beetles from Southwestern USA KAISER, A.*; QUINLAN, M. C.; Midwestern University, Glendale, AZ; Midwestern University, Glendale, AZ akaise@midwestern.edu The unique CO2 release pattern of discontinuous gas exchange (DGE) in insects is often assumed to have evolved to conserve body water. Recently, several alternative hypotheses have been presented to […]