VEILLETTE, P.A.*; GARCIA, M.M.; HINKLE, L.; SPECKER, J.L.; University of Rhode Island; University of Rhode Island; University of Rhode Island; University of Rhode Island: Detection of Glucocorticoid-Like Receptor During Stomach Organogenesis in Summer Flounder The stomach is an important organ, both physiologically and ecologically. Little is known about the endocrine regulation of stomach organogenesis. However, […]

BUCHHOLZ, D.R.; TOMITA, A.; FU, L.; SHI, Y.-B.; LGRD/NICHD/NIH: A dominant positive thyroid hormone receptor induces gene regulation and metamorphic transformation in the absence of thyroid hormone in vivo in transgenic frogs Frog metamorphosis is completely dependent on thyroid hormone. The effects of thyroid hormone are believed to be mediated by thyroid hormone receptors, although […]

HOWDESHELL, K.L.; SACHS, L.; DEMENEIX, B.; DENVER, R.J.; Univ. of Michigan, Ann Arbor; Museum National D-Histoire Naturelle, Paris, France; Museum National D-Histoire Naturelle, Paris, France; Univ. of Michigan, Ann Arbor: A Role for Basic Transcription Element Binding Protein (BTEB1) in the Autoinduction of the Xenopus laevis Thyroid Hormone Receptor Beta (TRβ) gene Basic transcription element […]

STORZ, Brian/L; Florida State University: A Reassement of the Proximate Mechanisms of Polyphenism in Spadefoot Toad Tadpoles Understanding the proximate mechanism of ontogenetic polyphenism is the first step in gaining a mechanistic and evolutionary understanding of the factors responsible for the control and evolution of polyphenism. Tadpoles of the spadefoot toad Spea multiplicata can display […]

CHAN, S.-M.; The University of Hong Kong: VITELLOGENESIS IN THE SHRIMP Metapenaeus ensis : MOLECULAR AND BIOCHEMICAL CHARACTERIZATION OF VITELLOGENINS The vitellin from M. ensis was purified and used to raise vitellin antibody. Several ovary polypeptides with large molecular weight (157, 78, 76 kDa) were identified as major vitellogenin subunits. Vitellogenin immunopositve signals could be […]

OLSON, C. R.; VLECK, C. M.; VLECK, D.; Iowa State University; Iowa State University; Iowa State University: Transient Thermal Fluctuations in Avian Eggs and their Implications for Growth and Ontogeny of Metabolism For bird embryos, episodic cooling that occurs when the incubating adult leaves the nest to forage is a fact of life for many […]

STEWART-SAVAGE, J*; COLE, BJ; Univ. New Orleans; DMC, Univ. of Maine: Ovarian Development in the Colonial Ascidian Botryllus schlosseri Botryllus schlosseri has a cyclic life history where all of the adult zooids are simultaneously replaced and all zooids can be reproductive. The ovary in the embryonic zooid is initially formed by the migration of oocytes […]

STRATHMANN, Richard R.; STRATHMANN, Megumi F.; HADFIELD, Michael G.; University of Washington; University of Washington; University of Hawaii: Nurse Egg Feeding Enhanced by Developmental Arrest of Sibling Veligers A complex form of adelphophagy, with nurse egg feeding by some siblings and arrested growth at the veliger stage for others, occurs in the brooded capsules of […]

SALVANTE, K.G.*; WALZEM, R.L.; WILLIAMS, T.D.; Simon Fraser Univ., Burnaby, BC,Canada; Texas A&M Univ., College Station; Simon Fraser Univ., Burnaby, BC, Canada: Differential allocation of lipid resources during avian egg production During avian egg production, hepatic lipid production increases markedly as very-low density lipoprotein (VLDL) synthesis shifts from the exclusive production of larger, generic VLDL, […]

DAVENPORT, I.R.; WOURMS, J.P.; Clemson University: A novel actin-based framework aids in the evolution of extreme egg size in chondrichthyan fishes. Of the 1200 species of chondrichthyan fishes, approximately 60% are viviparous. Typically they have low fecundity but compensate with large precocial offspring. Large offspring can be produced by: 1. lecithotrophy, where the developing embryo […]