Meeting Abstract S5-2.2  Saturday, Jan. 5  Social regulation of male reproductive plasticity in an African cichlid fish MARUSKA, K.P.*; FERNALD, R.D.; Louisiana State Univ, Baton Rouge; Stanford Univ, CA kmaruska@lsu.edu Social interactions and position in a dominance hierarchy can have profound effects on reproductive behavior and physiology, requiring animals’ to constantly integrate environmental information with their internal […]

Meeting Abstract S5-2.3  Saturday, Jan. 5  Neuroendocrine regulation of sexual plasticity in fishes GODWIN, J*; SLANE, MA; GEMMELL, NJ; North Carolina State University; North Carolina State University; University of Otago John_Godwin@ncsu.edu The study of sex differences has produced major insights into the organization of animal phenotypes and the regulatory mechanisms generating behavioral variation from similar genetic templates. […]

Meeting Abstract S5-2.1  Saturday, Jan. 5  Genetic and hormonal regulation of gonadal development and sexual plasticity in fish NAGAHAMA, Y.; Ehime Univ. nagahama.yoshitaka.mh@ehime-u.ac.jp Among the vertebrates, teleost fishes display the greatest diversity of sexual phenotypes, thus providing an excellent model to study molecular mechanisms of sex determination, sexual differentiation and sexual plasticity. We identified dmy as the […]

Meeting Abstract S5-1.4  Saturday, Jan. 5  The role of maternal hormones in avian sex ratio manipulation GROOTHUIS, T.G.G.*; GOERLICH, V.C.; DIJKSTRA, C.; University of Groningen, NL; University of Bielefeld D; University of Groningen, NL a.g.g.groothuis@rug.nl Avian species can manipulate the sex ratio of their offspring before these offspring hatch. In birds, mothers can not only affect the […]

Meeting Abstract S5-1.1  Saturday, Jan. 5  Targets for hormone-mediated sex ratio adjustment in vertebrates CREWS, D; University of Texas at Austin crews@mail.utexas.edu When considering sex ratios, we have to first define the nature of the question. Are we speaking of the gonads, secondary and accessory sex structures, physiology, brain, behavior, or all of the above elements. If […]

Meeting Abstract S5-1.3  Saturday, Jan. 5  Stress, hormones, and sex: How do we solve the puzzle of sex ratio adjustment in birds? NAVARA, KJ; Univ of Georgia knavara@uga.edu Ecologists and evolutionary biologists have shown time and again that birds have a striking ability to vary the ratios of male and female offspring they produce in response to […]

Meeting Abstract S5-1.5  Saturday, Jan. 5  From emergence to evolution: Phenotypic integration of complex offspring sex-bias BADYAEV, A.V.; Univ. Arizona abadyaev@email.arizona.edu Sex-bias in egg-laying order is a seemingly evolutionary impossible combination of precision, complexity, context-dependency, and reversibility. Yet, it is a common occurrence and a frequent starting point for a wide range of adaptive ecological and evolutionary […]

Meeting Abstract S5-1.2  Saturday, Jan. 5  Early hormonal influences on temperature dependent sex determination in turtles BOWDEN, R.M.*; CLAIRARDIN, S.G.; PAITZ, R.T.; Il. St. Univ.; Il. St. Univ.; Il. St. Univ. rmbowde@ilstu.edu In reptiles with temperature dependent sex determination (TSD), treatment with exogenous steroids, particularly estrogens, during the middle third of development have well documented effects on […]

Meeting Abstract S4-2.2  Saturday, Jan. 5  The first steps toward a Nematostella gene interaction network FISCHER, Antje H.L.*; COSENTINO, Carlo; SMITH, Joel; MBL; Università degli Studi Magna Graecia Catanzaro; MBL afischer@mbl.edu Cnidarians, the sister group to Bilaterians, are particularly interesting for understanding the evolution of fundamental developmental programs, such as axis specification, gastrulation and germ layer specification. […]

Meeting Abstract S4-2.1  Saturday, Jan. 5  The Comparative Biology of Gene Expression DUNN, CW; Brown University casey_dunn@brown.edu Phylogenetic analyses of gene expression have great potential for addressing a wide range of questions. They will, for example, provide new tools for understanding the relationships between genes and phenotypes by identifying genes that have evolutionary shifts in expression that […]