DEMARAIS, A.A.*; OLDIS, D.L; Univ. of Puget Sound; Univ. of Puget Sound: Visualization of Mother-to-Embryo Transfer in Livebearing Fishes Fishes of the family Poeciliidae are livebearers: eggs are retained in the ovary where they are fertilized and embryonic development ensues. At parturition, larval fish are released. Although the eggs of most Poeciliid fishes contain large […]

SCHMIDT, K.U.; STARCK, J.M.; Univ. of Munich; Univ. of Munich: Patterns of Variability during early Embryonic Development of Zebrafish, Danio rerio. Vertebrate embryos pass through a period of remarkable morphological similarity during their early embryonic development. Here, we study patterns of embryonic variation to test ideas about modularity and internal developmental constraints. Supposedly, modularity, constrains, […]

STOECKLIN, G.S.; Florida Institute of Technology: Ontogeny of Prey Capture Modulation in the common snook, Centropomus undecimalis The present study is the first to address the role of ontogeny in the feeding behavior of common snook under various prey types. Using high-speed video, feeding events were recorded and analyzed for integral linear and timing kinematic […]

ULUKOY, Gulsen; WOURMS, John P*; Mugla Univ., Turkey; Clemson Univ., SC USA: Ecdysis of the Trophotaenial Placenta in Neonates of Viviparous Goodeid Fishes Trophotaeniae, external extensions of the hindgut are the chief site of maternal nutrient uptake in embryos of viviparous goodeid fishes. At birth, neonates leave the isosmotic maternal environment for a hyposmotic one. […]

UCHIDA, K; MURAKAMI, Y; KURAKU, S; KURATANI, S; CDB, Riken, Kobe, Japan; CDB, Riken, Kobe, Japan; CDB, Riken, Kobe, Japan; CDB, Riken, Kobe, Japan: Development of the adenohypophysis in the lamprey: Evolution of epigenetic patterning programs in organogenesis In gnathostomes, the adenohypophysis is believed to develop through hierarchically organized epigenetic interactions based primarily on the […]

GASS, Gillian; ROBERT, Jason S.; University of Toronto; Dalhousie University: Development: Always the bridesmaid? Programmatic statements about evolutionary developmental biology (evo-devo) promise mutual benefits for evolutionary and developmental biology: the encounter between evolutionary biology and developmental biology, the story goes, will improve both areas of study. But while there are plenty of examples of developmental […]

ANDERSON, M. J.; WILLIAMS, E. E.*; Salisbury University; Salisbury University: The fatty acid composition of gill phospholipids from the blue crab (Callinectes sapidus) changes during the molt cycle The body and appendages of crustaceans are covered by an exoskeleton called the cuticle and its underlying hypodermis. In most species the cuticle is made rigid by […]

KENAGY, G.J.; University of Washington: Physiology, Adaptation, and Biogeography: New Echos from George Bartholomew’s Philosophy Nearly 50 years have passed since George Bartholomew produced an essay for a A.A.A.S. zoogeography symposium in which he discussed the role of physiology in the distribution of terrestrial vertebrates. Our views and technical abilities in the study of adaptation […]

LILLYWHITE, H.B.; ZAIDAN III, F.; University of Florida, Gainesville; University of Florida, Gainesville: Mutualism Between Birds and Snakes at Seahorse Key, Florida Seahorse Key is a 67 ha island protected in the Cedar Keys National Wildlife Refuge as an important rookery for thousands of wading birds that nest there. Cottonmouth snakes (Agkistrodon piscivorus conanti) inhabit […]

WOLCOTT, T.G.*; WOLCOTT, D.L.; HINES, A.H.; NC State Univ., Raleigh; NC State Univ., Raleigh; Smithsonian Env. Res. Ctr., Edgewater MD: Exploring migration of female blue crabs to spawning grounds, using biotelemetry and CTD dataloggers. After mating, female blue crabs (Callinectes sapidus) must migrate seaward (up to 200 km in Chesapeake Bay) to begin brood production. […]