SEWALL, K.*; HAHN, T. P.; University of California, Davis; University of California, Davis: Social Experience Influences Behavioral Discrimination of Call Types in Red Crossbills Red crossbills are songbirds that produce discrete, group specific calls, and call type is correlated with specific morphologies and foraging preferences. To examine the influence of these distinct call types on […]

JOHNSON, J.I.; SWITZER III, R.C.; MARINO, L.; FERREIRA, F.M.; MORRIS, J.A.; SUDHEIMER, K.D.; FOBBS JR., A.J.; Michigan State Univ., East Lansing; Neuroscience Associates, Inc., Knoxville, TN; Emory Univ., Atlanta, GA; Michigan State Univ., East Lansing; Michigan State Univ., East Lansing; Michigan State Univ., East Lansing; Natl. Mus. Health Med., Armed Forc. Inst. Pathol., Washington, DC; […]

STRAND, CR; SMALL, TW; DEVICHE, P; AZ St. Univ.; AZ St. Univ.; AZ St. Univ: Singing in the Rain: Growth of the song control system in free-ranging adult male Rufous-winged Sparrows, Aimophila carpalis In most songbirds, exposure to increasing photoperiod in the spring stimulates the development of the reproductive system. Singing behavior in males increases […]

HOCH, JM; Stony Brook University: Sexual allocation, sexual selection and environmental constraints in the barnacle Semibalanus balanoides Barnacles have been the subject of a great deal of work on sex allocation. They are simultaneous hermaphrodites that copulate with exaggerated penises. Sexual selection should favor longer penises, capable of reaching a greater number of mates, but […]

GANSER, L.R.; MANDICA, M.L.; University of Miami; University of Miami: Sexual Differences in the Brain of the Cane Toad, Bufo marinus We assessed the sex differences in the brain of Bufo marinus as part of a larger study involving the effects of endocrine disruptors on the sexual differentiation of the brain of B. marinus. Our […]

GRILLIOT, ME; BURNETT, SC; MENDONCA, MT; Auburn University, Auburn AL; Clayton College and State University, Morrow, GA: Sex and Seasonal Differences in the Echolocation Signals of Eptesicus fuscus Ultrasound is a widely used acoustical method for social communication, as well as for navigation and foraging. Although bats are well known for their use of ultrasound […]

MCPHERSON, Duane; SZALKOWSKI, Veronica; SUNY at Geneseo; SUNY at Geneseo: Serotonin receptor-specific agonists and cyclic AMP accumulation in Aplysia foot muscle In foot muscle of the marine mollusc Aplysia californica, serotonin (5-HT) increases the force of motoneuron-evoked contractions and also increases muscle relaxation rate. In isolated foot muscle, the same concentration of 5-HT (10 micromolar, […]

FOREST, D; LINDSAY, S; University of Maine: Serotonin may influence escape response in a polychaete tube-worm The neurotransmitter serotonin modulates various behaviors in many animals. During an experiment examining the effects of serotonin on the feeding behavior of a spionid polychaete, Streblospio benedicti, we observed unexpected increases in the number of spontaneous escape responses. Spionids […]

BEULIG,, A.*; FOWLER,, J.; New College of Florida; New College of Florida: Serotonin and avoidance learning in goldfish Serotonin (5-HT) has been implicated in clinical phenomena such as depression, and stress as well as general activity. The development of specific serotonin re-uptake inhibitors (SSRI�s)such as fluoxetine (Prozac)effective in the treatment of clinical depression was a […]

MILLER, GL*; LOUDON, C; University of Kansas; University of Kansas: Searching Through a Forest For a Mate: Orientation of Cockroaches In a Complex Flow Environment Native wood roaches of the genus Parcoblatta are found in forested and field habitats throughout much of the Eastern United States. Laboratory studies of some species of this sexually dimorphic […]