O’DONNELL, M.J.; RHEAULT, M.R.; McMaster University; McMaster University: Analysis of organic anion transport by isolated cells and tissues: A novel, non-invasive electrophysiological technique. Renal secretion of organic anions (OAs) is ubiquitous in its distribution. It has been observed in the kidneys of a number of vertebrate and invertebrate species. Prototypical OAs include p-aminohippurate (PAH), methotrexate, […]

CHEN, S; FRIEDRICH, M; Wayne State University; Wayne State University: Analysis of cell proliferation during embryonic leg development in the grasshopper Schistocerca americana Exhibiting an extaordinary range of morphological diversification, insect appendages serve as a useful paradigm to study molecular developmental mechanisms in the evolution of animal form. A particularly striking example is the hind […]

FOUNTAIN, M.P.; HRANITZ, J.M.; VENN, C.; KLINGER, T.S.; Bloomsburg University; Bloomsburg University; Bloomsburg University; Bloomsburg University: Analysis of VNTR Locus Variation in Two Species of Gooseneck Barnacle (Lepas) Several species of the gooseneck barnacle (Lepas) have overlapping distributions in the equatorial Pacific Ocean. Among these species, L. anatifera is the most widely distributed. L. anatifera […]

KUSAKABE, R; TOCHINAI, S; KURATANI, S; RIKEN Center for Developmental Biology, Japan; Grad. Sch. of Sci., Dept. of Biol.Sci., Hokkaido Univ., Japan; RIKEN Center for Developmental Biology, Japan: Analysis of Expression of Foreign Genes Introduced into Embryos of the Lamprey, Lampetra japonica: a New Technique to Analyze Evolutionary Changes in Gene Regulation. The lamprey occupies […]

JOHNSTONE, A.; BRAILOIU, E.; COOPER, R.L.; Dept. of Biology, Univ. KY.; Dept Pharmacol., E. TN State Univ.; Dept. of Biology, Univ. KY.: Alteration in synaptic transmission at the neuromuscular junction in crayfish, Drosophila and frog by exogenous application of the second messenger, IP6. The inositol IP3 is well established as a modulator of synaptic transmission, […]

WINDEL, N.*; ZORRILLA, S.; Univ. of the Ozarks; Univ. of the Ozarks: Air temperature can entrain circadian activity in armadillos Many diverse animal species exhibit behaviors that cycle over the period of one day, or in a circadian rhythm. Most animals have an internal clock that is sufficient for maintaining a regular schedule of activities, […]

SALEH, N.; MOZEL, L.; GUIASU, R.C.; DUNHAM, D.; University of Toronto; University of Toronto; University of Toronto; University of Toronto: Agonistic interactions in the semi-terrestrial crayfish Fallicambarus fodiens : the dynamics between winners and losers Agonistic displays evolved due to competition for resources. Combat between two animals usually results in one animal, the winner, gaining […]

STEIN, R.W.; WILLIAMS, T.D.*; Simon Fraser University, Burnaby, B.C.; Simon Fraser University, Burnaby, B.C.: Age-related variation in small intestine size in the Western Sandpiper (Calidris mauri): Early ontogeny, stage of migration, and cestode infection The Western Sandpiper (Calidris mauri) exhibits age-related variation in small intestine size during fall migration; however, the causal factors and functional […]

CLARK, T.M.; Indiana Univ. South Bend: Actions of Serotonin on the Posterior Stomach of Larval Aedes aegypti. Serotonin produces a long-lasting lumen-positive shift in the transepithelial potential of isolated, perfused posterior stomach. This effect is more pronounced at the anterior end than at the posterior end of this region demonstrating heterogenous distribution of transport mechanisms […]

RUIZ-VEGA, JOSE A.* ; STEVENSON, R.D.; Univ. OF Massachusetts Boston: A two-camera video system to measure animal locomotion outdoors Most research done on animal locomotion has been restricted to controlled laboratory settings, where animals move at constant velocity, or perform a standardize burst acceleration or jump. Few data exist for animals in the own environments […]