ZHOU, M.; SMITH, G.T.; Indiana Univ., Bloomington; Indiana Univ., Bloomington: Electrocommunication signals of Adontosternarchus balaenops Apteronotid knifefish produce a weak electric organ discharge (EOD) for electrolocation, and modulate the frequency of this discharge to produce “chirps,” which are used as communication signals. Electrocommunication in most species studied to date is sexually dimorphic. In Apteronotus leptorhynchus, […]

FALKENBACH, J.J.*; RUBBO, M.J.; BELDEN, L.K.; KIESECKER, J.M.; Pennsylvania State University; Pennsylvania State University; Virginia Polytechnic Institute and State University; Pennsylvania State University: Effects of trematode infection on the behavior of wood frogs in post-infection life history stages In addition to hindering growth and development, parasites have been shown to affect an organism�s behavior. However, […]

FRENCH, S. S. ; MOORE, M. C. ; Arizona State University; Arizona State University: Effects of stress on immunocompetence in male tree lizards, Urosaurus ornatus We are interested in how stress effects partitioning of resources among immunocompetence and other organismal functions. However, measuring immunocompetence in a simple, integrated way is a challenge. Recent studies of […]

KNEBEL, SM; SAWYER, SJ; KRAJNIAK, KG; Southern Illinois University Edwardsville: Effects of serotonergic agonists and selective serotonin reuptake inhibitors on the earthworm crop-gizzard Serotonin (5-HT) is a biogenic amine neurotransmitter whose presence has been identified in both vertebrate and invertebrate organisms. In vertebrates, serotonin receptors have been classified into seven different serotonin receptor classes based […]

PALGI, N.*; VATNICK, I.; RONEN, Z.; PINSHOW, B.; Jacob Blaustein Inst. for Desert Research, Ben-Gurion Univ. of the Negev, Midreshet Ben-Gurion, Israel; Widener Univ., Chester, PA, USA; Jacob Blaustein Inst. for Desert Research, Ben-Gurion Univ. of the Negev, Midreshet Ben-Gurion, Israel; Jacob Blaustein Inst. for Desert Research, Ben-Gurion Univ. of the Negev, Midreshet Ben-Gurion, Israel: […]

LOOMIS, S.H.*; BETTRIDGE, A.; Connecticut College; Connecticut College: Effects of osmotic pressure on metabolism and cell division in germinating gemmules of the fresh water sponge, Anheteromeyenia ryderi Many fresh water sponges produce gemmules to survive periods of environmental stress. Gemmules of Anheteromeyenia ryderi are produced year round. Just after production, gemmules are in a state […]

GAMBLE, J. BROOK; O’REILLY, KATHLEEN M.; BUCK, C. LOREN; University of Alaska Fairbanks; University of Portland; University of Alaska Fairbanks: Effects of Reproductive Stage on Adrenal Responsiveness of Glaucous-winged Gulls The reproductive period for seabirds is both energetically expensive and potentially stressful. Parents have the dual challenge of maintaining their own body condition while meeting […]

CRIBBS, A.M.; HAUSSMANN, M.F.; VLECK, C.M.; Iowa State University, Ames; Iowa State University, Ames; Iowa State University, Ames: Effects of Aging on Glucocorticoids and Immune Responses in Zebra Finches Age affects many physiological parameters. Corticosterone is an adrenal hormone that improves an animal�s ability to deal with stress. Chronically elevated glucocorticoids, however can compromise resistance […]

GIPSON, Kevin; BOILY, Patrice; PROTTI, Lori; Univ. New Orleans; Univ. New Orleans; Univ. New Orleans: Effect of stress and stress-induced fever on sprint speed in Sprague-Dawley rats In response to psychological stress, higher vertebrates (reptiles, mammals and birds) exhibit a series of physiological changes, known as the �Fight-or-Flight response�, that includes an increase in core […]

GARCIA, M.; HINKLE, L.; VEILLETTE, P.A.; SPECKER, J.L.; University of Rhode Island; University of Rhode Island; University of Rhode Island; University of Rhode Island: Effect of exogenous cortisol and RU486 on cortisol concentrations and on Na+/K+-ATPase and glucocorticoid-like receptor immunoreactivity in juvenile summer flounder Cortisol is a steroid hormone secreted in response to stress and […]