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 22.3  Sunday, Jan. 4  The highly divergent developmental pathways of marsupial fore- and hind limbs: Evidence from the AER DOROBA, C.K.*; SEARS, K.E.; University of Illinois; University of Illinois carolyn.doroba@gmail.com Marsupials give birth after short gestations to neonates that must immediately crawl to the teat using only their precociously developed forelimbs (FL). As their hind […]

Meeting Abstract 22.1  Sunday, Jan. 4  Monotreme postcranial ontogeny and the evolution of mammalian skeletal development WEISBECKER, Vera*; SANCHEZ-VILLAGRA, Marcelo R; Cambridge University; Universitaet Zuerich vwei07@esc.cam.ac.uk Mammalian postcranial diversity and development is often discussed with view to a potential relationship of mammalian reproduction with postcranial ontogeny. However, data on monotremes, representing the earliest diverging extant mammalian clade, […]

Meeting Abstract 22.4  Sunday, Jan. 4  Modularity and integration of mandibular size and shape ZELDTICH, M.L.*; SWIDERSKI, D.L.; WOOD, A.R.; Univ. of Michigan, Ann Arbor; Univ. of Michigan, Ann Arbor; Univ. of Michigan, Ann Arbor zelditch@umich.edu The mammalian mandible is a developmentally modular, functionally integrated system. Whether morphological integration can evolve to match functional integration may depend […]

Meeting Abstract 22.6  Sunday, Jan. 4  Evolution of modularity: selection for trait disassociation PAVLICEV, M*; CHEVERUD, JM; WAGNER, GP; Washington University, St. Louis; Washington University, St. Louis; Yale University, New Haven pavlicev@pcg.wustl.edu Genetic variance in intertrait relationship provides potential for evolutionary change in integration of phenotypic units and can supply a model for the evolution of modularity. […]

Meeting Abstract 22.5  Sunday, Jan. 4  Does Morphological Integration Have Macroevolutionary Implications? HABER, Annat; University of Chicago annat@uchicago.edu The study of morphological integration has received increasing attention in evolutionary biology in the last two decades. Based on previous theoretical and empirical work, an association is expected between ontogenetic integration within a species and that species potential to […]

Meeting Abstract 22.2  Sunday, Jan. 4  Covariation, disparity and constraints in marsupial and eutherian limb evolution SEARS, K.E.; University of Illinois ksears@life.uiuc.edu Marsupial newborns complete a life-or-death crawl to the teat, powered solely by their forelimbs. As a result, marsupial fore- and hind limbs have disparate functional requirements early in development. In contrast, eutherians develop largely in […]

Meeting Abstract 22.2  Monday, Jan. 4  The physiological response of tropical reef corals to light reflected from the benthos COLVARD, Nicholas B.*; EDMUNDS, Peter J.; California State University, Northridge; California State University, Northridge ncolvard@gmail.com Here we test the effect on reef corals of heavily grazed (HG) and macroalgae-dominated (MD) substrata through alterations in reflected light. On shallow […]