ROBERTS, S.P.*; ELEKONICH, M.M.; Univ. of Nevada Las Vegas; Univ. of Nevada Las Vegas: Physiological Underpinnings of Age-Related and Environmentally-Mediated Phenotypic Plasticity in Honey Bees Honey bee workers exhibit a form of behavioral development termed �temporal polyethism�, progressing through a series of behavioral stages in an age-related fashion. Younger individuals work inside the hive at […]

HARRISON, J.F.; GREENLEE, K.J.; KIRKTON, S.D.; Arizona State University; Arizona State University; Arizona State University: Ontogeny of tracheal system function in insects The amazing diversity of insect respiratory systems and their range of morphological and physiological changes during development challenge our ability to describe tracheal development with simple generalities. However, one clear pattern is an […]

REIBER, C.L.; University of Nevada,Las Vegas: Integrated hypoxic response: From the gene to behavior Appropriate ontogeny of physiological regulatory mechanisms is critical for an animal’s ability to deal with environmental variables encountered at different developmental stages and varying periods during their life cycle. Selective pressures can be encountered at any point during an animal’s embryonic, […]

Meeting Abstract S11-1.1  Monday, Jan. 7  Williams’s Paradox and the role of phenotypic plasticity in sexual systems LEONARD, J.L.; Univ, of California-Santa Cruz jlleonar@ucsc.edu As George Williams pointed out in 1975, although evolutionary explanations, based on selection acting on individuals, have been developed for the advantages of simultaneous hermaphroditism, sequential hermaphroditism and gonochorism, none of these evolutionary […]

Meeting Abstract S11-1.2  Monday, Jan. 7  Metamers, modules, phenotypic plasticity, and the evolution of diverse sexual systems in plants DIGGLE, P.K.; Univeristy of Colorado, Boulder pamela.diggle@colorado.edu Plant development is metameric: apical meristems produce a sequence of repeated units over space and time. These metamers, in turn, may be modular with the potential for independent adjustment of component […]

Meeting Abstract S11-1.3  Monday, Jan. 7  Gonochorists or hermaphrodites? Gonochoric worms with flexible sex allocation LORENZI, M.C.*; SELLA, G.; Univ. of Turin, Italy; Univ. of Turin, Italy cristina.lorenzi@unito.it Related species share genetic and developmental backgrounds. Therefore, hidden genetic variation for sex determination may allow separate sex species – that share recent common ancestors with hermaphroditic species – […]

Meeting Abstract S11-1.6  Monday, Jan. 7  Genetic, Environmental and Social Control of Sex Change in Molluscs COLLIN, R; STRI, Panama collinR@si.edu Molluscs show a wide diversity of sexual strategies and mechanisms of sex determination. There are both gastropod and bivalve families that are each primarily dioecious, simultaneous hermaphrodites, or sequential hermaphrodites. The multiple evolutionary origins of sex […]

Meeting Abstract S11-1.7  Monday, Jan. 7  Evolution of hermaphroditism in fishes ERISMAN, Brad; Scripps Institution of Oceanography, UC San Diego berisman@ucsd.edu Sexual patterns in fishes are incredibly diverse compared to other vertebrates, as hermaphroditism is taxonomically widespread and takes on many forms including simultaneous, protogynous, and protandrous hermaphroditism, bi-directional sex change and androdioecy. The proximate mechanisms that […]

Meeting Abstract S11-1.5  Monday, Jan. 7  Environmental influences on plasticity in sexual investment in Daphnia WALSH, M. R.; Univ. of Texas Arlington matthew.walsh@uta.edu Sex and dormancy are directly connected in organisms that engage in asexual and sexual reproduction. The transition between asexual and sexual reproduction typically results in a dormant stage that provides a mechanism to persist […]

Meeting Abstract S11-1.4  Monday, Jan. 7  Diverse and plastic sexual systems in barnacles YUSA, Yoichi*; SAWADA, Kota; YAMAGUCHI, Sachi; Nara Women’s University; The Graduate University for Advanced Studies; Kyushu University yusa@cc.nara-wu.ac.jp Barnacles (Crustacea: Thoracica) show diverse sexual systems, including simultaneous hermaphroditism, androdioecy (hermaphrodites + males), and dioecy (females + males). When males occur, they are always smaller […]