RIFFELL, J.A.; KRUG, P.J.; ZIMMER, R.K.; Univ. of California, Los Angeles; California State Univ., Los Angeles; Univ. of California, Los Angeles: Ecological and evolutionary consequences of sperm chemoattraction for fertilization success Chemical communication between sperm and egg is a critical factor mediating sexual reproduction. Sperm attractants may be significant evolutionarily for maintaining species barriers, and […]

JAWOR, Jodie M.*; KETTERSON, Ellen D.; Indiana University; Indiana University: Dominance status influences breeding success in female dark-eyed juncos (Junco hyemalis). The association between male dominance status and mating success has been well studied in many species. Males of higher dominance status acquire higher quality resources needed for reproduction and higher quality mates. Testosterone influences […]

GUZMAN, D.B.; CLEMENT, T.S.; FERNALD, R.D.; Smith College; Stanford University; Stanford University: Does the Victor Get the Spoils?: The Role of Observational Learning in Mate Choice Previous studies of animal behavior indicate that individuals can increase their fitness by modifying their behavior and physiology in response to the interactions of others. Mate choice is one […]

O’BRIEN, Sara; BENTLEY, George E; UKENA, Kazuyoshi; TSUTSUI, Kazuyoshi; WINGFIELD, John C; Univ. of Washington, Seattle; Univ. of Washington, Seattle; Hiroshima Univ., Japan; Hiroshima Univ., Japan; Univ. of Washington, Seattle: Does Testosterone Influence Gonadotropin-Inhibitory Hormone in the Avian Hypothalamus? Gonadotropin-inhibitory hormone (GnIH) is a recently discovered hypothalamic neuropeptide that influences gonadotropin release. In vitro, GnIH […]

CARLSON, R.L.*; SHULMAN, M.J.; ELLIS, J.C.; Univ. of California, Davis; Cornell University; Brown University: Distribution patterns of the common periwinkle Littorina littorea (L.) in the southern Gulf of Maine The common periwinkle Littorina littorea is a ubiquitous inhabitant of rocky shores in the North Atlantic. Although the snail exhibits a relatively consistent pattern of vertical […]

AHMED, Nafisa; SHOUKFEH, Omar M.; CARR, James A.; Texas Tech Univ., Lubbock; Texas Tech Univ., Lubbock; Texas Tech Univ., Lubbock: Distribution of Corticotropin-releasing Hormone-like Immunoreactivity in the Brain of the Texas Toad, Bufo speciosus We investigated the distribution of corticotropin-releasing hormone (CRH)-like immunoreactive (ir) neurons in the brain of adult male B. speciosus. Well-organized groups […]

BOTZ, J. T.; LOUDON, C.; University of Kansas; University of Kansas: Dissipation of energy in surface waves: consequences for information transmission at the air:water interface The attenuation of surface waves (ripples) has important implications for animals that use such waves to obtain information about objects in their environment. At any distance, such attenuation will decrease […]

HILL, R.I.*; VACA, J.F.; Univ. of California, Berkeley: Differential Wing Strength In Pierella Butterflies (Nymphalidae, Satyrinae) Supports The Deflection Hypothesis The �deflection hypothesis� asserts that conspicuous marginal patches on insect wings function to deflect predator attacks to these patches and away from more vital body parts. As a result of selection from such predator attacks […]

REYNOLDS, Julie A.; HAND, Steven C.; Louisiana State University; Louisiana State University: Developmental arrest and metabolic downregulation in embryos of the Southern ground cricket, Allomenobius socius. Diapause is an endogenously controlled state of dormancy that allows organisms to tolerate harsh environmental conditions. It is characterized by developmental arrest and a species-specific suite of physiological changes […]

HIERONYMUS, T.L.*; WITMER, L.M.; Ohio University; Ohio University: Dermal Enthesis: Anatomy and Histology of Rhinoceros Horn Attachment Rugosities on dermal bones of the skull have often been used to support inferences regarding unpreserved cutaneous appendages in extinct animals (e.g., horns). Such associations often seem obvious when examined in extant osteological specimens, where the conformation of […]