ALLEN, J.D.; ZAKAS, C.; PODOLSKY, R.D.; University of North Carolina at Chapel Hill: Testing the consequences of an egg size reduction for a species with facultatively feeding larvae In free-spawning marine invertebrates, larval development typically proceeds by one of two common modes: planktotrophy (obligate feeding) or lecithotrophy (obligate non-feeding). In a rare third developmental mode, […]
sessions: Session 37
Egg size and the evolutionary transition to non-feeding development in Macrophiothrix brittlestars
PODOLSKY, Robert; ALLEN, Jonathan; University of North Carolina, Chapel Hill; University of North Carolina, Chapel Hill: Egg size and the evolutionary transition to non-feeding development in Macrophiothrix brittlestars Marine invertebrates exhibit broad diversity in developmental form and life-history mode. Efforts to understand the origins of this diversity have focused on processes that underlie transitions between […]
Costs and limits of phenotypic plasticity during development of Lytechinus variegatus
MCALISTER, J.S.; PODOLSKY, R.D.; UNC-Chapel Hill; UNC-Chapel Hill: Costs and limits of phenotypic plasticity during development of Lytechinus variegatus Theoretical models predict that the evolution of phenotypic plasticity, differential phenotypic expression in heterogeneous environments, may be constrained by costs and limits. Despite careful empirical studies in several biological systems, significant costs and/or limits of adaptive […]
Browsing through old journals lessons learned from earlier fecundity-time models
KUPRIYANOVA, E.K.; University of Adelaide, Australia: Browsing through old journals: lessons learned from earlier fecundity-time models In 1973 Vance published a model that explains differences in reproductive strategies in marine invertebrates. The original model (Vance 1973a) resulted in a concave fitness function suggesting that only extremes of egg provisioning (referred to as egg size) are […]
Artificial selection on egg size in the polychaete worm Hydroides elegans
MILES, Cecelia M.; WAYNE, Marta L.; University of Florida; University of Florida: Artificial selection on egg size in the polychaete worm Hydroides elegans Life histories in marine invertebrates are very diverse, and the topic of the transition between obligate feeding larvae and non-feeding larval forms has been a recurrent theme. One theory regarding the transition […]
A Biochemical Analysis of Developing Eggs and Larvae of the American Horseshoe Crab Limulus polyphemus from Delaware Bay and the Gulf of Mexico
MOLLENHAUER, M.A.; BIESIOT, P.M.*; PERRY, H.M.; Univ. Southern Mississippi, Hattiesburg; Univ. Southern Mississippi, Hattiesburg; USM’s Gulf Coast Research Laboratory, Ocean Springs, MS: A Biochemical Analysis of Developing Eggs and Larvae of the American Horseshoe Crab Limulus polyphemus from Delaware Bay and the Gulf of Mexico The American horseshoe crab Limulus polyphemus ranges along the Atlantic […]
Why does stress suppress immunity A possible answer from insects
ADAMO, Shelley A*; PARSONS, N; Dalhousie University; Dalhousie University: Why does stress suppress immunity? A possible answer from insects. Both vertebrates and mollusks (e.g. oysters) become more susceptible to disease after exposure to a stressor, suggesting that stress-induced immunosuppression is an old and wide spread phenomenon. We found that insects are also immunosuppressed by stress. […]
Seasonal, sex-, and age-related variation in serum immunoglobulin levels in the red-eared slider turtle
HARMS, Heidi K.*; BOWDEN, Rachel M.; TUCKER, John K.; Illinois State University; Illinois State University; Illinois Natural History Survey: Seasonal, sex-, and age-related variation in serum immunoglobulin levels in the red-eared slider turtle The immune system of ectothermic vertebrates fluctuates seasonally, being sensitive to both environmental and hormonal cues. Low immunocompetence often occurs during the […]
Proteomic Analyses reveal that Components of the Cytoskeletal Network are Up-Regulated before Hibernation in Fence Lizards
LONDRAVILLE, R. L.*; NIEWIAROWSKI, Peter/H; KAVETI, Suma; KINTER, Michael; University of Akron; University of Akron; Cleveland Clinic Foundation; Cleveland Clinic Foundation: Proteomic Analyses reveal that Components of the Cytoskeletal Network are Up-Regulated before Hibernation in Fence Lizards We are undertaking long-term studies aimed at understanding the mechanistic basis of differences in life-history strategies among populations […]
Intestinal parasitism during development affects morphology and ornamentation of ring-necked pheasants
GRINDSTAFF, J.L.*; SMITH, H.G.; Lund University; Lund University: Intestinal parasitism during development affects morphology and ornamentation of ring-necked pheasants Although it is generally assumed that effects of the developmental environment are transient and have little impact on adult phenotype, a growing number of studies have found persistent effects of developmental stress on adult morphology and […]
