CUPP, JR. , P. V.: Chemical Detection of Predatory Salamanders by the Four-toed Salamander, Hemidactylium scutatum Four-toed salamanders, Hemidactylium scutatum were tested for the ability to detect odors of the northern red salamander, Pseudotriton ruber, a species known to prey on salamanders. Individual H. scutatum were placed in plastic containers (31 x 23 x 6 […]

SALVANTE, K.G.*; WALLOWITZ, M.; WALZEM, R.L.; WILLIAMS, T.D.: Characterization of very-low density lipoprotein particle size in egg-laying birds Avian egg production is dependent on dramatic changes in lipid metabolism, including a marked increase in hepatic production of estrogen-induced, yolk-targeted very-low density lipoprotein (VLDLy). The presence of VLDLy in the plasma represents a shift in hepatic […]

YU, X.-L.; CHANG, E.S.; MYKLES, D.L.: Characterization of limb autotomy factor-proecdysis, a polypeptide that inhibits molting in the land crab Regeneration of lost appendages must be coordinated with various other physiological processes to ensure successful molting in decapod crustaceans. Autotomy of at least 5 walking legs induces precocious molting in the land crab, Gecarcinus lateralis. […]

BELY, A.E.*; WEISBLAT, D.A.: Cellular origins of regenerated structures in the annelid Tubifex tubifex The ability to regenerate lost body parts varies dramatically between different animals, sometimes even between closely related species. Among annelids, for example, leeches are incapable of regenerating any lost segments, while many oligochaetes are capable of extensive regeneration. It is likely […]

HAN, D.W.; WATSON, R.D.*: Cell signaling pathways for ecdysteroidogenesis in blue crab Y-organs Crustacean Y-organs secrete ecdysteroid molting hormones. The production of ecdysteroids by Y-organs is regulated (negatively) by a neuropeptide, molt-inhibiting hormone (MIH). Available data indicate the suppressive effect of MIH on ecdysteroidogenesis is mediated by a rise in the intracellular level of one […]

PIRES, A.*; GILBORN, A.C.: Catecholamines in metamorphosis of primitive gastropods. Metamorphosis of molluscan veligers is usually induced by a chemosensory stimulus and includes stereotyped behaviors. Recently it has been shown that the induction of metamorphosis is modulated by catecholamine neurotransmitters, in the opisthobranch gastropod Phestilla sibogae. In an effort to determine if such modulation is […]

FULFORD, A. D.; HEWS, D. K.: Can redback salamanders (Plethodon cinereus) discriminate conspecific cues on a substrate that is more chemically complex than filter paper? The redback salamander is suggested to rely heavily on chemoreception in communication. The extensive research documenting chemosensory abilities of this species, and that of most salamanders, is restricted almost entirely […]

OSOVITZ, C. J.*; JULIAN, D.: Burrow Irrigation Rate of Urechis caupo in Its Natural Habitat Burrow dwelling filter feeders pump large amounts of seawater through their burrows for nutrition and respiration. In our study, we determined how much water is pumped by the echiuran worm Urechis caupo in its natural habitat. U. caupo‘s burrow irrigation […]

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 […]