Meeting Abstract 22.6  Thursday, Jan. 3  Evolutionary Implications of Maternally-derived Thyroid Hormone on Development CROCKFORD, S.J.; Univ. of Victoria, BC scrock@uvic.ca Many hormones influence embryonic growth and development but thyroid hormone (TH) regulates more additional functions and processes, at all life stages, than any other: TH is also required for post-natal growth and brain development, stress responses, […]

Meeting Abstract 22.2  Thursday, Jan. 3  Environmentally-induced stress modifies maternal deposition of yolk hormones in the lizard Anolis carolinensis WALGUARNERY, JW*; LOVERN, MB; University of Tennessee, Knoxville; Oklahoma State University, Stillwater jwalguar@utk.edu The regulation and transfer of maternal hormones to yolk is increasingly seen as a link between adult environment, reproductive physiology, and offspring phenotype. Stress induced […]

Meeting Abstract 22.1  Thursday, Jan. 3  Effects of Increased Yolk Corticosterone on Embryonic and Yolk Hormone Levels Throughout Incubation JOHNSTON, GIH*; SHAFFERY, HM; MOORE, MC; Arizona State University gjohnston@asu.edu Recent studies have shown that steroids of maternal origin can be sequestered in egg yolk. However, what happens to these steroids during embryonic development is still unclear. How […]

Meeting Abstract 21.4  Thursday, Jan. 3  The near-field flow generated by hummingbird wings WARRICK, D. R.*; TOBALSKE, B. W.; POWERS, D. R.; Oregon State Univ., Corvallis; University of Portland; George Fox University warrickd@science.oregonstate.edu Hummingbirds, like other birds, generate lift coefficients far in excess (~ 2x) of those generated by typical man-made airfoils. The kinematic and Re number […]

Meeting Abstract 21.3  Thursday, Jan. 3  Saccadic turns in walking and flying Stalk-eyed flies: The behavior and kinematics of turning a wide head. RIBAK, G.*; EGGE, A.R; SWALLOW, J.G.; Univ. of South Dakota gribak@usd.edu While turning flies typically perform short bursts of body and head rotations (�saccades�) to orient the body with the new direction of motion. […]

Meeting Abstract 21.1  Thursday, Jan. 3  Maximum vertical force production in bumblebees (Apidae: Bombini) – a methodological comparison BUCHWALD, Robert*; DUDLEY, Robert; University of California, Berkeley; University of California, Berkeley rbuchwald@gmail.com Description of the maximum forces produced by flying animals is important for understanding general limits to lift and power production, but such limits can be difficult […]

Meeting Abstract 21.6  Thursday, Jan. 3  Landing flight in the pigeon Columba livia BERG, A.M.*; BIEWENER, A.A.; Concord Field Station amberg@fas.harvard.edu Using high-speed video, EMG and sonomicrometry, we studied the landing flight of four pigeons (Columba livia). As the birds approached the perch, we found no consistent increase or decrease in the center of mass potential energy, […]

Meeting Abstract 21.5  Thursday, Jan. 3  Hovering aerodynamics in hummingbirds: comparing a dynamically-scaled robot with live birds. TOBALSKE, B.W.**; WARRICK, D.R.; DICKSON, W.B.; ALTSHULER, D.A.; DICKINSON, M.H.; Univ. of Portland; Oregon State Univ.; California Institute of Technology; Univ. of California, Riverside; California Institute of Technology tobalske@up.edu To help elucidate the mechanisms that permit hovering in hummingbirds, we […]

Meeting Abstract 21.2  Thursday, Jan. 3  Gliding Ants: 3D Kinematics, Maneuvers and Behaviors MUNK, Y; Univ. of California, Berkeley yonatanmunk@berkeley.edu Gliding ants of the genus Cephalotes have been shown to be capable of directed aerial descent in the absence of wings or any other obvious morphological adaptations for aerodynamic performance. The first step towards understanding the mechanisms […]

Meeting Abstract 20.6  Thursday, Jan. 3  The roles of UDP-glucose-6-dehydrogenase and mshA are responsible for colonization of sepiolid (Cephalopoda: Sepiolidae) light organs. ARIYAKUMAR, D.; NISHIGUCHI, M.K.*; New Mexico State University, Las Cruces donsanji@nmsu.edu Mutualistic associations between the sepiolid squid Euprymna tasmanica (Mollusca: Cephalopoda) and its luminescent bacterium, Vibrio fischeri have been extensively studied as a model to […]