GRAY, A.C.*; LOIZI, H.; CORRELL, M.; GOODWIN, T.; RASMUSSEN, L.E.L.; SCHULTE, B.A.; Georgia Southern University, Statesboro; Georgia Southern University, Statesboro; College of William and Mary, Williamsburg, VA; Hendrix College, Conway, Arkansas; Oregon Health and Sciences University, Beaverton, OR; Georgia Southern University, Statesboro; ; : Social group association patterns by young male and female African elephants […]

MARTIN, Arthur/L; BERGMAN, Daniel/A; MOORE, Paul/A; Bowling Green State University; Bowling Green State University; Bowling Green State University: Social communication in crayfish: a simultaeous recording of urine signals and flow fields during agonistic encounters Many animals use sensory information when making decisions regarding social status. Crayfish use chemical signals to determine the past social history […]

MOOI, R.*; BALL, J.E.; California Academy of Sciences, San Francisco; California Academy of Sciences, San Francisco: Size, shape, and phylogeny in northern Pacific sand dollars from the Miocene to the present Most sand dollars (Clypeasteroida, Echinoidea) are associated with extant tropical or subtropical habitats. However, in the northern Pacific Ocean there is a rich diversity […]

HOCK, A. D.; KNIGHT, F. M.; Univ. of the Ozarks: Size and growth variance within and among armadillo clones (Dasypus novemcinctus) Nine-banded armadillos are born in litters of monozygotic quadruplets. Thus, armadillos provide a rare model system for assessing the relationship between genetic homogeneity and phenotypic homogeneity. Obviously, for armadillos we expect that phenotypic variance […]

FARRAR, R.S.; RODNICK, K.J.; Idaho State University: Signaling pathways involved in steroid-induced inotropism of cardiac tissue from rainbow trout Plasma levels of steroid hormones vary in salmonid fishes depending on reproductive status and stress levels. Similar to mammals, androgens promote dramatic sex differences in ventricle size and function during sexual maturation of salmon and trout. […]

ARNOLD, Emily M.; VUTURO, Steven A.; SHUSTER, Stepehn M.; Northern Arizona University: Sexual Selection in a Gulf of California Mud Shrimp, Neotrypaea uncinata Sexual selection occurs when receptive females are clumped in space and dispersed in time. Under these circumstances few males mate, characters that enhance male mating success are favored, and sexual dimorphism evolves. […]

CHIN, E.H.*; LOVE, O.P.; WILLIAMS, T.D.; Simon Fraser Univ., Burnaby, BC, Canada; Simon Fraser Univ., Burnaby, BC, Canada; Simon Fraser Univ., Burnaby, BC, Canada: Sex-specific effects of brood size manipulation on offspring immunocompetance Previous studies in birds have revealed that experimentally increasing brood size decreases the quality of individual offspring, due to factors such as […]

KOLODZIEJSKI, J.A.*; SMITH, G.T.; Indiana University, Bloomington; Indiana University, Bloomington: Sex and species differences in neuromodulatory control of communication: A comparative study of substance P and chirping in Apteronotus Weakly electric fish often modulate their continuous electric organ discharge to produce social signals known as �chirps�. In the brown ghost knifefish, Apteronotus leptorhynchus, chirp rate […]

MOORE, Ignacio T.; BENTLEY, George E.; WINGFIELD, John C.; BRENOWITZ, Eliot A.; Virginia Tech; University of Washington; University of Washington; University of Washington: Seasonal plasticity in the brain of a tropical bird Seasonal changes in the brain mediate seasonal activities such as reproduction. At higher latitudes, seasonally breeding birds typically use changes in daylength to […]

WELLS, H.*; MUZAFFAR, N; Univ. of Tulsa, Oklahoma USA; National Agriculture Research Center, Pakistan: Risk sensitivity in Apis cerana Risk sensitivity of the Asian hive bee (Apis cerana) was tested in Pakistan, which is within its endemic range. European honeybees (Apis mellifera caucasica), which are an introduced species in the Indian Subcontinent, were used as […]