Meeting Abstract 59.2  Wednesday, Jan. 6  Regulation of Methyl Farnesoate Esterase during development of the tadpole shrimp, Triops longicaudatus GLEDHILL, Michael R*; TRAN, Michael C; TSUKIMURA, Brian; California State Univ., Fresno mrgledhi@csufresno.edu Methyl farnesoate (MF), a putative crustacean hormone, is well documented as the precursor to juvenile hormone in insects. In crustaceans, MF promotes juvenile morphology, with […]

Meeting Abstract 59.3  Wednesday, Jan. 6  Novel mechanisms regulating a sexual signal: testosterone inhibition of pheromone production in red-sided garter snakes PARKER, M ROCKWELL*; MASON, ROBERT T; Oregon State Univ., Corvallis parkermi@science.oregonstate.edu Most vertebrates coordinate reproduction using multiple signals, but species that utilize single signals to encode multiple pieces of information are powerful models for understanding the […]

Meeting Abstract 59.5  Wednesday, Jan. 6  Hormonal correlates accompanying reproductive behavior in three species of python BRASHEARS, J.A.*; DENARDO, D.F.; Arizona State University jake.brashears@asu.edu Parental care, while ubiquitous among mammals and birds, is also common in ectothermic vertebrates. The examination of parental care across major taxa sheds light on the physiological context within which it evolves. Pythonidae […]

Meeting Abstract 59.11  Wednesday, Jan. 6  Flexibility of the HPG Axis of Female Northern Cardinals (Cardinalis cardinalis): Implications for Behavior and Reproductive Context DEVRIES, M. S.*; HOLBROOK, A. L.; WINTERS, C. P.; JAWOR, J. M.; The University of Southern Mississippi; The University of Southern Mississippi; The University of Southern Mississippi; The University of Southern Mississippi Margaret.DeVries@usm.edu Testosterone’s […]

Meeting Abstract 59.7  Wednesday, Jan. 6  First –day release and Dio2: a test of latitudinal variation in photoperiodic control of reproduction in great tits Parus major PERFITO, Nicole*; JEONG, Sunny; BENTLEY, George E.; SILVERIN, Bengt; HAU, Michaela; Max-Planck Institute for Ornithology, Germany and Univ. of California, Berkeley; Univ. of California, Berkeley; Univ. of California, Berkeley; Univ. of […]

Meeting Abstract 59.1  Wednesday, Jan. 6  Cortisol masculinizes female mosquitofish morphology and behavior KNAPP, R.*; MARSH-MATTHEWS, E.C.; VO, L.; Univ. of Oklahoma, Norman; Univ. of Oklahoma, Norman; Univ. of Oklahoma, Norman rknapp@ou.edu The ability of sex steroids to influence vertebrate sexual development and differentiation is well known. In many taxa, females can be masculinized by exposure to […]

Meeting Abstract 59.10  Wednesday, Jan. 6  Corticosterone as a mediator of reproductive effort PATTERSON, S.H.*; BREUNER, C.W.; Univ. of Montana; Univ. of Montana stephen1.patterson@umontana.edu Reproductive effort varies among individuals and can have a profound effect on fitness. The physiological mechanisms underlying this variation are important to understanding inter-individual differences in reproductive effort and, by extension, fitness. Individuals […]

Meeting Abstract 59.9  Wednesday, Jan. 6  Behavioural and physiological responses of a wild teleost fish to cortisol and androgen manipulations during parental care DEY, C.J.*; O’CONNOR, C.M.; GILMOUR, K.M.; VAN DER KRAAK, G.; COOKE, S.J.; McMaster Univ., Hamilton, ON; Carleton Univ., Ottawa, ON; Univ. of Ottawa, ON; Univ. of Guelph, ON; Carleton Univ., Ottawa, ON cody.dey@live.com It […]

Meeting Abstract 59.8  Wednesday, Jan. 6  Age-related differences in HPG axis responsiveness to GnRH challenge in Florida Scrub-Jays WILCOXEN, T. E.*; SCHOECH, S. J.; University of Memphis; University of Memphis twilcoxn@memphis.edu Baseline concentrations of testosterone vary with age in male Florida Scrub-Jays (Aphelocoma coerulescens). Levels are relatively low in young and old male breeders and reach their […]

Meeting Abstract 58.5  Tuesday, Jan. 5  When kids out-perform adults: Contrasting ontogenetic locomotor performance for two species of Galliform birds DIAL, KP; Univ Montana, Missoula kdial@mso.umt.edu At hatching, megapods (e.g., brush turkey, malleefowl) are the most well-developed (ie., super-precocial) birds in the world and even possess flight-capable wings. I studied ontogeny of locomotion in Australian brush turkey […]