Meeting Abstract 57.5  Thursday, Jan. 6  Functionality of Wings in Flight and Gliding of Stick Insects ZENG, Y*; DUDLEY, R; Univ. of California, Berkeley; Univ. of California, Berkeley dreavoniz@berkeley.edu Many unresolved questions in animal flight evolution relate to the transition between flightless and volant forms. Functional analysis of transitional modes using anatomical intermediates may help to assess […]

Meeting Abstract 57.2  Thursday, Jan. 6  Evolution of locomotor systems in frogs JORGENSEN, M.E.*; REILLY, S.M.; Ohio University mj207406@ohio.edu Reconstruction of ancestral character states can enhance our understanding of the evolution of organisms as well as provide a basis from which one can construct hypotheses about trait evolution, ecology, and function in a taxonomic group. The anuran […]

Meeting Abstract 57.1  Thursday, Jan. 6  Benthic Walking in the African Lungfish (Protopterus annectens) KING, Heather M*; SHUBIN, Neil H; COATES, Michael I; HALE , Melina E; Univ of Chicago; Univ of Chicago; Univ of Chicago; Univ of Chicago hking@uchicago.edu Central questions in tetrapod evolution are how the transitions from water to land and fins to limbs […]

Meeting Abstract 56.1  Thursday, Jan. 6  Uptake and consequences of yolk androstenedione in male and female chicks BENOWITZ-FREDERICKS, ZM*; HODGE, M; CHOW, J; HAUSSMANN, M; Bucknell University; Bucknell University; Bucknell University; Bucknell University zmbf001@bucknell.edu Androstenedione is found in avian egg yolks in large quantities, but its role in development is unclear. One possibility is that males and […]

Meeting Abstract 56.3  Thursday, Jan. 6  Testosterone Inhibits Hepatic IGF-I Message in Sceloporus undulatus, a Female-Larger Species of Lizard DUNCAN, C.A.**; JOHN-ALDER, H.B.; Rutgers Univ.; Rutgers Univ. duncan@aesop.rutgers.edu In many species of animals, adults of one sex are larger than the other. Sexual dimorphism in body size (SSD) can arise when members of one sex grow faster […]

Meeting Abstract 56.5  Thursday, Jan. 6  Seminal Plasma Progesterone Influences Sperm Hole Penetration in White Leghorns ANDERSON, E.M.*; NAVARA, K.J.; University of Georgia, Athens; University of Georgia, Athens erinma@uga.edu While there has been significant interest in identifying the hormonal contributions passed on with gametes by female birds, the hormone content of fluids contributed during reproduction by the […]

Meeting Abstract 56.6  Thursday, Jan. 6  Elevated testosterone during meiotic segregation stimulates laying hens to produce more sons. PINSON, SE*; NAVARA, KJ; University of Georgia, Athens; University of Georgia, Athens sbmoore@uga.edu Birds have demonstrated a remarkable ability to manipulate offspring sex. Previous studies suggest that treatment with hormones can stimulate females to manipulate offspring sex, and that […]

Meeting Abstract 56.2  Thursday, Jan. 6  Color in context: female convict cichlids alter carotenoid-based traits in response to predation risk and changes in breeding status WONG, S. C.*; EARLEY, R. L.; University of Alabama; University of Alabama stephc.wong@gmail.com laborate male secondary sexual traits, from ornaments to armaments, have long been considered markers of ideal mates and/or superior […]

Meeting Abstract 56.4  Thursday, Jan. 6  Acute stress-induced inhibition of plasma testosterone in male songbirds: time course, reversibility, and specificity DEVICHE, Pierre J*; BURIN DES ROZIERS, Matthieu; GAO, Sisi; Arizona State University; University of Poitiers, France; Arizona State University deviche@asu.edu Acute stress in birds can rapidly inhibit plasma testosterone (T; Deviche et al., 2010: Gen. Comp. Endocrinol.), […]

Meeting Abstract 55.3  Thursday, Jan. 6  The role of postmating isolating barriers in the hybridization of Orangethroat Darters. BOSSU, Christen M.*; NEAR, Thomas J.; Yale University; Yale University christen.bossu@yale.edu Understanding the maintenance and dissolution of reproductive isolating barriers between species is essential to the study of how biodiversity originates. Yet, the completeness of species reproductive barriers may […]