Meeting Abstract 21.3  Jan. 5  Single- and multi-generational effects of atmospheric oxygen level on body size and tracheal dimensions in Drosophila melanogaster KLOK, C.J.*; KAISER, A.; LEE, W.H.; SOCHA, J.J.; HARRISON, J.F.; Arizona State University; Midwestern University; Argonne National Laboratory; Argonne National Laboratory; Arizona State University cjklok@asu.edu Comparison of the historical records for maximal insect size and […]

Meeting Abstract 21.2  Jan. 5  New Insights into Phanerozoic Oxygen Levels and their Impact on Evolution VANDEN BROOKS, J. M.; Arizona State University john.vandenbrooks@asu.edu Variation in atmospheric oxygen levels has the potential to be one of the main drivers of long-term vertebrate evolution through the Phanerozoic. Recent models of the evolution of atmospheric oxygen through time have […]

Meeting Abstract 21.6  Jan. 5  Hotter is Better: Thermodynamics Constrains the Evolution of Insect Population Growth Rates FRAZIER, M.R.**; HUEY, R.B.; BERRIGAN, D.; Univ. of Washington, Seattle; Univ. of Washington, Seattle; Univ. of Washington, Seattle mfrazier@u.washington.edu Biochemical and physiological adaptations enable diverse ectotherms to survive and reproduce in very different temperature regimes, but whether these adaptations fully […]

Meeting Abstract 21.4  Jan. 5  Does the thermal tolerance of the Western Fence Lizard change with air temperature? MCMILLAN, D.M.*; ADOLPH, S.C.; IRSCHICK, D.J.; University of Massachusetts Amherst; Harvey Mudd College; University of Massachusetts Amherst mcmillan@nsm.umass.edu Understanding the effects of global climate change on populations of natural organisms is a difficult task because often the differences caused […]

Meeting Abstract 21.1  Jan. 5  Bumblebee flight kinematics under natural and experimental variations in air pressure DILLON, M. E.*; CONG, G.; DUDLEY, R.; University of Washington, Seattle; Sichuan University, Chengdu, PRC; University of California, Berkeley dillonm@u.washington.edu Despite the challenges of flying in reduced density air, bumblebees (genus Bombus) thrive on mountains. Flight at high altitudes (reduced air […]

Meeting Abstract 20.6  Jan. 5  Temporal effects of testosterone treatment on song control region growth in adult male House Finches STRAND, C.R.*; DEVICHE, P.; Arizona State University, Tempe christy.strand@asu.edu In adult male songbirds, increases in circulating testosterone (T) levels and singing behavior induce the growth of specific brain regions that control singing behavior (song control regions; SCRs). […]

Meeting Abstract 20.2  Jan. 5  Seasonal variation in the endocrine regulation of aggressive behavior in a sedentary tropical bird HAU, M*; BEEBE, K; CANOINE, V; SCHLINGER, BA; Princeton University hau@princeton.edu Evidence is accumulating from studies in temperate-zone male vertebrates that the endocrine regulation of aggressive territorial behavior differs seasonally. During the breeding season a combination of androgenic […]

Meeting Abstract 20.8  Jan. 5  Seasonal social modulation of testosterone in the Costa Rican rufous-collared sparrow (Zonotrichia capensis costaricensis) ADDIS, E. A.*; BUSCH, D. S.; CLARK, A. D.; WINGFIELD, J. C.; University of Washington; University of Washington; University of Washington; University of Washington addise@u.washington.edu Previous work has shown that birds breeding in northern temperate regions adjust production […]

Meeting Abstract 20.3  Jan. 5  Seasonal components of the reproductive schedules of North American crossbills (Loxia sp.). HAHN, TP*; CORNELIUS, JM; KELSEY, TR; Univ. of California Davis; Univ. of California Davis; Univ. of California Davis tphahn@ucdavis.edu Crossbills have been thought capable of initiating reproduction at any time of year, or maintaining it indefinitely, if food supply permits. […]

Meeting Abstract 20.9  Jan. 5  Range Expansion and Neuroendocrine Modulation in Puget Sound White-Crowned Sparrows (Zonotrichia leucophrys gambelii) DAVIS, J.E.*; ADDIS, E.A.; O’BRIEN, S.; WINGFIELD, J.C.; University of Washington jedavis@u.washington.edu The Puget Sound white-crowned sparrow (Z. l. pugetensis) has a historic breeding distribution limited to the Pacific coast of Oregon and Washington. In contrast, Gambel�s white-crowned sparrows […]