MENDON�A, M.T.; Auburn University: Flutamide and fadrazole are ineffective in blocking the expression of male mating behavior in big brown bats. Male big brown bats mate in late fall and upon arousal from hibernation conditions throughout the winter, a time when testes are regressed and plasma testosterone levels are relatively low. Over the last several […]

PERFITO, N.*; ZANN, R.A.; BENTLEY, G.E.; HAU, M.; Princeton Univ., New Jersey; LaTrobe Univ., Victoria, Australia; Univ. of Washington, Seattle; Princeton Univ., New Jersey: Endocrine mechanisms mediating reproduction in an unpredictable environment Opportunistically breeding species respond to short-term, local cues in their environment to time reproduction appropriately. However, the neuroendocrine and endocrine control of this […]

REEDER, D.M.*; KUNZ, T.H.; WIDMAIER, E.P.; Boston Univ., MA; Boston Univ., MA; Boston Univ., MA: Behavioral and physiological responses to group formation in the Malayan Flying Fox (Pteropus vampyrus) vary by sex and group type. We examined the response to formation of same sex groups (SSGs) and breeding groups (BGs) in captive Malayan Flying Foxes […]

BELANGER, Rachelle M.; MOORE, Paul A.; Bowling Green State University; Bowling Green State University: The utilization of the major chelae by male crayfish (Orconectes rusticus) for detecting female pheromones. The abundance and spatial distribution of the sensory hairs of the major chelae of the crayfish (Orconectes rusticus) are dependent upon the sex of the crayfish […]

RUBENSTEIN, D.R.; WIKELSKI, M.; Cornell University; Princeton University: Steroid hormone patterns and aggression during breeding and nesting in female Gal�pagos marine iguanas. We studied steroid hormone patterns and aggression during breeding and nesting in female Gal�pagos marine iguanas (Amblyrhynchus cristatus). Following mating, females display aggressively, signaling to males that they are no longer receptive. After […]

JOHNSON, S.L.*; YUND, P.O.; Darling Marine Center, University of Maine; Darling Marine Center, University of Maine: Sperm longevity and fertilization in the colonial ascidian, Botryllus schlosseri. Sperm longevity in free-spawning marine invertebrates that broadcast their eggs is typically assumed to be irrelevant to field fertilization processes. If gametes are quickly diluted after release, contact between […]

CLEMENT, Tricia, S.; GRENS, Kerry, E.; FERNALD, Russell, D.; Stanford University: Reproductive State and Affiliative Behavior in Haplochromis burtoni We examined behavioral preferences to discover the mechanisms by which social behavior regulates reproduction in the African cichlid, Haplochromis burtoni. Males can be one of two distinct phenotypes, territorial (T) or non-territorial (NT). T males defend […]

BAUER, R.T.*; NEWMAN, W.A.; Univ. of Louisiana, Lafayette; Scripps Inst. Oceanography: Protandric simultaneous hermaphroditism in the marine shrimp Lysmata californica (Caridea: Hippolytidae) Until recently, the only hermaphroditism documented in decapod crustaceans was protandry, in which individuals first develop and function as males (male phase = MP) before changing to females (female phase = FP). However, […]

WOLCOTT, D.L.; WOLCOTT, T.G.; No. Carolina State Univ., Raleigh; No. Carolina State Univ., Raleigh: Potential fecundity of female blue crabs, Callinectes sapidus Blue crabs are susceptible to sperm limitation because females mate during one brief interval at their molt to maturity and then rely on stored sperm for production of multiple broods. Sperm limitation has […]

OMANA, E.C.; SHUSTER, S.M; Northern Arizona University: PARADELLA DIANAE (CRUSTACEA: ISOPODA) IN THE NORTHERN GULF OF CALIFORNIA: ECOLOGY AND REPRODUCTIVE BIOLOGY Paradella dianae is a sexually dimorphic and protogynous sphaeromatid isopod that is widely distributed due to international shipping. Although common residents of intertidal communities, little is known about its biology. We are the first […]