Meeting Abstract 103.1  Tuesday, Jan. 7 08:15  Regulation of maternally-derived steroids by developing threespined stickleback embryos PAITZ, RT*; BELL, AM; Univ. of Illinois; Univ. of Illinois rpaitz@illinois.edu Exposure to maternal steroids during embryonic development influences offspring phenotypes. Recent studies have shown that in several vertebrate taxa, embryos are capable of metabolizing maternal steroids, thereby modulating their exposure […]

Meeting Abstract 103.5  Tuesday, Jan. 7 09:15  Glucocorticoid responses to adrenocorticotropic hormone (ACTH) in red-sided garter snakes, Thamnophis sirtalis: Effects of sex and season DAYGER, CA*; LUTTERSCHMIDT, DI; Portland State University cdayger@pdx.edu Many studies have demonstrated that vertebrate stress responses are often context-dependent. We recently showed that low body condition is associated with greater sensitivity to capture […]

Meeting Abstract 103.2  Tuesday, Jan. 7 08:30  Experimental relationships between plasma- and feather-levels of corticosterone in a free-living bird FAIRHURST, G.D.*; MARCHANT, T.A.; SOOS, C.; MACHIN, K.L.; CLARK, R.G.; Univ. of Saskatchewan | Environment Canada, Saskatoon; Univ. of Saskatchewan, Saskatoon; Environment Canada | Univ. of Saskatchewan, Saskatoon; Univ. of Saskatchewan, Saskatoon; Environment Canada | Univ. of Saskatchewan, […]

Meeting Abstract 103.6  Tuesday, Jan. 7 09:30  Development of vernal migration and breeding stages in the White-crowned Sparrow (Z. Leucophrys gambelli): a role for thyroid hormones? PEREZ, JH*; WINGFIELD, JC; RAMENOFSKY, M; Univ. of California, Davis jhperez@ucdavis.edu With the annual increase in photoperiod, migratory White-crowned Sparrows (Z. l. gambelii) undergo preparations for vernal migration and initiate preparations […]

Meeting Abstract 103.4  Tuesday, Jan. 7 09:00  Advanced reproductive phenology of an urban bird is not mirrored in the underlying reproductive physiology DAVIES, S*; DEVICHE, P; Arizona State University; Arizona State University Scott.Davies@asu.edu For seasonally breeding animals, the decision of when to begin breeding each year has considerable effects on fitness. Birds cycle between periods of breeding […]

Meeting Abstract 102.7  Tuesday, Jan. 7 09:30  Thermoregulation and energetics in hibernating black bears: The mystery of multi-day body temperature cycles. BARNES, BM*; TOIEN, O; Univ of Alaska Fairbanks bmbarnes@alaska.edu Black bears overwintering in outdoor hibernacula in Fairbanks, Alaska don’t move much, reduce whole body metabolism to as low as 25% of basal rates, and decrease core […]

Meeting Abstract 102.2  Tuesday, Jan. 7 08:15  Thermal Physiology, Climate, and Altitude Zonation in Andean Birds CHAPPELL, M.A.*; LONGONO, G.A.; JANKOWSKI, J.E.; ROBINSON, S.K.; Univ. of California, Riverside; Univ. of California, Riverside; Univ. of British Columbia, Vancouver; Univ. of Florida, Gainesville chappell@ucr.edu Tropical bird communities along the eastern slope of the Andes are characterized by striking altitude […]

Meeting Abstract 102.3  Tuesday, Jan. 7 08:30  Potential biological implications of rapid ocean warming in the Bay of Fundy, Canada KOOPMAN, HN*; WESTGATE, AJ; SIDERS, ZA; UNC Wilmington; UNC Wilmington; UNC Wilmington koopmanh@uncw.edu Ocean temperatures have been increasing globally at rates of 0.05–0.5ºC per decade, but little is known about potential consequences to ecosystems. One aspect of […]

Meeting Abstract 102.4  Tuesday, Jan. 7 08:45  Fractal dimension of landscape features drives activity of terrestrial ectotherms SEARS, MW*; LEVY, O; ANGILLETTA, MJ; Clemson Univ.; Arizona St. Univ.; Arizona St. Univ. sears3@clemson.edu Understanding the ecological responses to global climate change represents one of the greatest challenges of the 21st century. To forecast these responses, we must develop […]

Meeting Abstract 102.5  Tuesday, Jan. 7 09:00  Does Burrow Temperature Constrain Antipredator Behavior in Juvenile Gopher Tortoises? RADZIO, T.A.*; O’CONNOR, M.P.; Drexel University; Drexel University tar55@drexel.edu Ectotherms may experience a tradeoff between predator avoidance and thermoregulation, particularly when refuge temperatures are physiologically suboptimal. Theory predicts that ectothermic prey will adjust hiding times following unsuccessful attacks to optimize […]