SCHMIDT, K.E.*; LEAL, R.; DESAI, P.; KELLEY, K.M.: Proposed Growth-Inhibitory Role of a Membrane-Associated Insulin-like Growth Factor-Binding Protein (IGFBP) in an Iguanid Heart Cell A heart cell line derived from Iguana iguana expresses a single IGFBP that is present as both a secreted 30 kDa protein as well as bound on the cell membranes. Competition […]

LONDRAVILLE, R.L.*; DUVALL, C.S.: Fish Respond to Murine Leptin Injections by Increasing Intracellular Fat Metabolism. Green sunfish (Lepomis cyanellus) were injected (i.p.) with murine leptin over the course of two weeks to test the hypothesis that fish respond to leptin in a manner similar to mammals. Leptin is a 16 kDa protein hormone that controls […]

Beckman, B.R.*; Fairgrieve, W.; Cooper, K.A.; Mahnken, C.V.W.; Dickhoff, W.W.: Endocrine Correlates of Growth in Ocean Dwelling Coho Salmon Pacific Salmon typically spend 1-3 years foraging and growing in the ocean prior to returning to freshwater spawning sites. Inter-annual differences in ocean temperatures and productivity may have profound effects on the growth of these animals. […]

VAN CLEEFF, J.*; BLACHE, D.; MARTIN, G.: Early castration of male emus (Dromaius novaehollandiae) reduces their feed efficiency and attenuates vernal fattening without impairing appetite The emu responds to increasing photoperiod with an increase in appetite and fat deposition. This response is normally delayed until breeding season hormones, stimulated by short days, have been cleared […]

MAURES, T.*; DUAN, C. : EXPRESSION OF INSULIN-LIKE GROWTH FACTOR BINDING PROTEIN-1 IN ZEBRAFISH Regulation of growth factor and hormone action by soluble hormone binding proteins has emerged as a common theme for a variety of peptides including insulin-like growth factors (IGFs). Among the best studied hormone binding proteins are members of the IGF binding […]

Moore, M.C.*; Painter, D.; Woodley, S.K.; Lacy, E.L.; Jennings, D.H.; Wikelski, M.: Neuroendocrine mechanisms of alternative male reproductive tactics in marine iguanas Alternative male phenotypes often differ as much in appearance and behavior as do males from females. These extreme examples of within-sex variation are good models to examine neuroendocrine bases of such variation. The […]

Mendon�a, M. T.: Effects of temperature, testosterone, and flutamide on mating in male big brown bats Male big brown bats exhibit a dissociated pattern of reproduction. They mate in the late fall and throughout the winter upon periodic arousal from hibernation when testosterone (T) is basal and gonads are regressed. In previous experiments, males mated […]

LOVERN, M.B.*; MCNABB, F.M.A.; JENSSEN, T.A.: Developmental effects of testosterone on behavior in male and female green anole lizards. This study addressed the role of testosterone (T) in the development of sexually dimorphic behavior in the green anole lizard, Anolis carolinensis. We described the developmental pattern of endogenous T concentrations, and determined the behavioral effects […]

WOODLEY, S.*; PAINTER, D.; MOORE, M.; WIKELSKI, M.: Daily rhythm of basal corticosterone levels is not synchronized with feeding activity in Marine Iguanas Basal plasma glucocorticoids (e.g., corticosterone (B)) levels follow a circadian rhythm. The rhythm can be entrained by photoperiod and food availability and functions in aspects of energy metabolism. Marine iguanas (Amblyrhynchus cristatus) […]

HOLLIS, D.H.*; BOYD, S.K.: Characterization and distribution of [3H]muscimol binding to a GABA-A-like receptor in the bullfrog brain. The inhibitory neurotransmitter gamma-aminobutyric acid (GABA) has multiple receptor subtypes. The GABAA receptor is widespread in the mammalian brain, but little is known about GABA receptors in the amphibian brain. Binding of the GABAA receptor agonist, [3H]muscimol, […]