Meeting Abstract S3-2.1  Wednesday, Jan. 4  Two reproductive strategies and their implications for population dynamics: An individual-based model of the poecilogonous spionid Boccardia proboscidea OYARZUN, FX*; GRüNBAUM, D; University of Washington, Seattle; University of Washington, Seattle fernanda.oyarzun@gmail.com Poecilogony is the ability of some marine invertebrate species to alternate between multiple developmental modes. The spionid polychaete Boccardia proboscidea […]

Meeting Abstract S3-2.2  Wednesday, Jan. 4  The consequences of a poecilogonous life history for dispersal ability, genetic structure and gene flow in coastal populations of the polychaete Streblospio benedicti ZAKAS, Christina*; WARES, John P; University of Georgia; University of Georgia christinazakas@gmail.com In many species, alternative developmental pathways lead to the production of two distinct phenotypes, promoting the […]

Meeting Abstract S3-2.4  Wednesday, Jan. 4  Discussion

Meeting Abstract S3-2.3  Wednesday, Jan. 4  Developmental mode polymorphism and population connectivity in the polychaete Pygospio elegans KESäNIEMI, J.E.*; KNOTT, K.E.; University of Jyväskylä, Finland; University of Jyväskylä, Finland jenni.kesaniemi@jyu.fi The tube building polychaete Pygospio elegans is poecilogonous, producing both dispersive planktotrophic larvae and brooded lecithotrophic larvae released as benthic juveniles. Because these larvae have differing dispersal […]

Meeting Abstract S3-1.2  Wednesday, Jan. 4  What Can “Intermediates” Tell Us About Evolutionary Transitions Between Modes of Invertebrate Development? COLLIN, R; Smithsonian Tropical Research Institute collinr@si.edu Mode of development in marine invertebrates has been largely viewed as a dichotomy between small eggs that develop into free-living planktotrophic larvae and large eggs that bypass the larval stage and […]

Meeting Abstract S3-1.5  Wednesday, Jan. 4  Streblospio benedicti (Spionidae, Annelida) as a model organism for the study of larval evolutionary transitions SCHULT, N.*; MCHUGH, D.; Colgate Univ. dmchugh@colgate.edu Streblospio benedicti represents a rare case of poecilogony and is an ideal model for the integration of approaches to study evolutionary transitions in larval development mode of marine invertebrates. […]

Meeting Abstract S3-1.1  Wednesday, Jan. 4  Poecilogony, polymorphism or polyphenism: a window on larval evolutionary transitions in marine invertebrates KNOTT, K.E.*; MCHUGH, D.; University of Jyväskylä, Finland; Colgate University, USA emily.knott@jyu.fi Poecilogony, intraspecific variation in developmental mode, has been described in some marine invertebrates. Poecilogonous species produce different larval forms (e.g. free-swimming planktotrophic larvae as well as […]

Meeting Abstract S3-1.7  Wednesday, Jan. 4  Poecilogony in the polychaete Polydora cornuta: A potential polyphenism that requires decisions, decisions, decisions. GIBSON, G D; Acadia University glenys.gibson@acadiau.ca Poecilogonous species are wonderful organisms with which to investigate the mechanisms that underlie developmental decisions leading to phenotypic divergence. For example, broods of the spionid Polydora cornuta contain eggs that develop […]

Meeting Abstract S3-1.3  Wednesday, Jan. 4  Origins of poecilogony and shifts in larval type in photosynthetic sea slugs: a phylogenetic perspective VENDETTI, J. E. *; KRUG, P. J. ; California State Univ., Los Angeles jannvendetti@yahoo.com The Sacoglossa are a clade of specialized algae-eating sea slugs, some of which retain functional chloroplasts in their own tissues for weeks […]

Meeting Abstract S3-1.6  Wednesday, Jan. 4  Looking for poecilogony in the Streblospio benedicti genome ROCKMAN, Matthew; New York University mrockman@nyu.edu Larval traits couple development and ecology. Alleles at loci that influence larval morphology have pleiotropic effects on feeding and predation and on their own gene flow. Though such loci must underlie evolutionary transitions in larval form, the […]