HARA, E; HEWS, D. K.: Brain sex dimorphism of the eastern fence lizard, Sceloporus undulatus, a species with male aggression. The sexes differ in a variety of behaviors, and in many animals sexual dimorphism in brain nuclear volumes are thought to contribute to such differences. We are studying the neuroendocrine basis of sex and species […]

AHMAD, Nina; COURSEY, Yvonne; STEIMEL, Nancy; KIMBLE, Mary: Blood Cell Production Begins at Stage 18 in the American Horseshoe Crab, Limulus Polyphemus. The blood cells, or hemocytes of the American horseshoe crab, Limulus polyphemus, are used for production of Limulus Amebocyte Lysate (LAL). LAL is widely used in the medical field to test for the […]

NEPHEW, B.C.; ROMERO, L.M.: Behavioral, cardiovascular, and endocrine responses of European starlings (Sturnus vulgaris) to acute crowding Although numerous studies have investigated the behavioral, cardiovascular, and endocrine responses to acute stressors, it is unknown for most species how these components interact to create an integrated stress response. We simultaneously measured behavior, heart rate (HR), and […]

ST. JULIANA, J. R. ; JANZEN, F.J.: Behavioral and physiological maternal effects and temperature-dependent sex determination in common snapping turtles In organisms exhibiting temperature dependent sex determination (TSD), offspring sex is determined primarily by the nest temperature. Recent work suggest that egg yolk hormones may also influence embryonic sex determination. Thus, both behavioral (i.e. nest-site […]

NEUFFER, Jacquelyn, M. *; NAIDITCH, Sarah, E.; HARRIS COTNER, Sehoya, C.; WOODWARD, Denise: Aggression in Fiddler Crabs, Genus Uca: Part 1 Male fiddler crabs (genus Uca) are known for their single, large cheliped. This large claw is believed to be beneficial for a male during courtship and fighting. Several attempts have been made to clarify […]

OLSON, JR*; TILLMAN, EG; HATLE, JD; JULIANO, SA: A threshold for initiating the canalized phase of reproduction in the lubber grasshopper The reproductive cycle of the grasshopper Romalea microptera is believed to consist of two phases: a plastic (flexible) phase during which feeding rate affects reproductive timing and allotment, and a later, canalized (inflexible) phase, […]

KEMPF, S.C.: A confocal examination of ampullary neurons in the apical sensory organ of molluscan larvae The apical sensory organ (ASO) is present in the larvae of many invertebrate species with possible homologues also occurring in lower chordates. In mollusks, the ASO consists of both sensory neurons and non-sensory neurons that are organized as a […]

JACKSON, J.L.; LINDSAY, S.M.: A comparison of anterior regeneration between Dipolydora quadrilobata and Pygospio elegans Spionid polychaetes display a variety of reproductive strategies, from asexual to sexual reproduction of both planktotrophic and lecithotrophic larvae. Like other polychaetes, spionids often lose anterior body parts to browsing predators; they regenerate this tissue over time. This study compared […]

GILCHRIST, S.L.: A Seven Year Study of Shell Distribution and Use by Coenobita clypeatus on Bailey’s Cay, Roatan, Honduras Bailey’s Cay is a small volcanic island surrounded by seagrass and coral reefs. It is covered with lithophytic vegetation interspersed by volcanic rock. Individuals of Coenobita clypeatus, found commonly on the island, obtain empty gastropod shells […]

COWART, J.D.*; MINER, B.G.: A Re-evaluation of Egg Energetics for the Facultative Planktotroph Clypeaster rosaceus (Echinodermata: Echinoidea) The sand dollar, Clypeaster rosaceus, has an unusual reproductive strategy (facultative planktotrophy) that is intermediate between the two common types of echinoid larval development: planktotrophy and lecithotrophy. The larvae of C. rosaceus can complete development and metamorphosis entirely […]