SILVERSTEIN, JT; USDA-ARS-NCCCWA: Neurohormonal regulation of feeding in fish There is extraordinary diversity in life histories of fish with regard to feeding, for example the prolonged periods of fasting in salmon and lamprey contrasted with periods of extreme prespawning consumption in some teleosts such as scorpaenids. In addition to life history programming, feed intake is […]

MOMMSEN, T.P.; BUSBY, E.R.; Univ. of Victoria; Univ. of Victoria: Hormones regulating glucose metabolism: the good and the ugly (without the bad) Even though plasma glucose in fishes may not be as tightly controlled as in mammals, numerous hormones interact to regulate piscine glucose metabolism. The presentation will review the specific metabolic roles, sites of […]

AAS-HANSEN, �.*; J�RGENSEN, E.H.; VIJAYAN, M.M.; Univ. of Waterloo, ON, Canada (Present institutions: Norwegian Institute for Nature Research and Univ. of Troms�, Troms�, Norway); Norwegian Institute for Nature Research, Troms�, Norway; Univ. of Waterloo, ON, Canada: Hormonal control of hepatocyte metabolism in Arctic charr Anadromous Arctic charr, Salvelinus alpinus, perform seasonal migrations between fresh water […]

BUDDINGTON, RK; KROGDAHL, A; Mississippi State University; Norwegian College of Veterinary Medicine: Hormonal Regulation of the Gastrointestinal Tract of Fish The gastrointestinal tract (GIT) of fish and other vertebrates is challenged with a diversity of functional demands that are associated with changes and differences in dietary inputs and environmental conditions. Many of the hormones, associated […]

VIJAYAN, M.M.; SATHIYAA, R.; University of Waterloo; University of Waterloo: Autoregulation of glucocorticoid receptor by cortisol in rainbow trout hepatocytes Glucocorticoids play an important role in the stress response and glucocorticoid receptor (GR) regulation may be a key process in the physiological response to regain homeostasis. We used primary cultures of rainbow trout hepatocytes and […]

WEIDER, LJ; Univ. of Oklahoma: rDNA intergenic spacer (IGS) length variation and its significance for influencing growth and/or developmental rates of organisms. The ribosomal (r)DNA molecule is a multi-gene family, and in eukaryotes, consists of a transcription unit that includes the genes for 18S, 5.8S, and 28S rRNA subunits (�rrn� genes), the internal transcribed spacers […]

MARKOW, T; WATTS, T; University of Arizona; University of Arizona: The coupling of growth, RNA and DNA content, and C:N:P stoichiometry in Drosophila The growth rate hypothesis, that rapid growth is associated with high levels of phosphorus relative to nitrogen and high levels of RNA relative to DNA, was tested in three species of Drosophila […]

KUANG, Yang; Arizona State University, Tempe, AZ 85287: Stoichiometry and Biodiversity via Models and Simulations The competitive exclusion principle (CEP) states that no equilibrium is possible if n species exploit fewer than $n$ resources. This principle does not appear to hold in nature, where high biodiversity is commonly observed, even in seemingly homeogenous habitats. Although […]

STERNER, Robert W.; FORMAN, Rebecca; HENDRIXSON, Heather; HOOD, James; ZIMMER, Kyle; Univ. of Minnesota; Univ. of Minnesota; Univ. of Minnesota; Univ. of Minnesota; Univ. of Minnesota: Stoichiometric Patterns at the Small and the Large Scale We undertook several interconnected studies under the auspices of the IRCEB project. We reared Daphnia pulex in conditions of: high […]

SCHADE, John D.; KYLE, Marcia; HOBBIE, Sarah E.; FAGAN, William F.; ELSER, James J.; Arizona State University, Tempe, AZ; Arizona State University, Tempe, AZ; University of Minnesota, St. Paul, MN; University of Maryland, College Park, MD; Arizona State University, Tempe, AZ: Stoichiometric Interactions Between Desert Soils, Plants and Herbivores We studied C, N and P […]