ILSE, L.M.*; HELLGREN, E.C.: Porcupines, Pinyon Pines, and Pine Engravers: What’s the Connection? Understanding linkages among different trophic levels is important to the conservation and management of ecosystems. The goal of this research was to test the hypothesis that porcupines, Erethizon dorsatum, predispose the papershell pinyon pine, Pinus remota, a Pleistocene-relict species, to colonization by […]

Smallwood, P.D.*; Terzaghi, W.B.; Steele, M.A.; Carlson, J.E.; Mank, J.E: Further investigations into the interactions between small vertebrates and oaks: An interdisciplinary approach At last year’s meeting, we reported that several species of small vertebrates consistently cache viable acorns of the red oak group much more frequently than those of the white oak group. We […]

Pfennig, D. W.*; Harcombe, W. R.; Pfennig, K. S.: Coral snake mimics are protected only when they occur with their model Many species avoid being eaten by mimicking unpalatable species. A critical, but untested, prediction of mimicry theory is that protection from predators should break down in the absence of a dangerous model. We evaluated […]

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 […]