YANG, P.-F.; WANG, H.-Y.; LEE, C.-Y.*: Involvement of 5- hydroxytryptamine-enhanced release of crustacean hyperglycemic hormone in stress-induced hyperglycemia The objectives of the present study were to investigate the effect of 5-hydroxytryptamine (5-HT) on the release of crustacean hyperglycemic hormone (CHH), and to determine if stress-induced hyperglycemia is mediated by 5-HT-enhanced CHH release. Eyestalk ganglia with […]

WIBBELS, T.*; MURDOCK, C.: Interclutch variability of sex ratios produced at pivotal temperature in a turtle with temperature-dependent sex determination The red-eared slider turtle, Trachemy scripta, has a Male/Female (MF) pattern of temperature-dependent sex determination in which cooler incubation temperatures produce males and warmer temperatures produce females. The pivotal temperature (temperature producing a 1:1 sex […]

Spees, J.L.*; Chang, S. A..; Snyder, M. J.; Chang, E. S.: Interactive effects of osmotic and thermal stress on stress-responsive gene expression in the American lobster, Homarus americanus Organisms in nature experience multiple environmental stressors simultaneously. For marine animals such as the American lobster, Homarus americanus, osmotic and thermal stress often occur concurrently or in […]

CROWLEY, M.C.*; HATLE, J.D.; ANDREWS, A.L.; JULIANO, S.A.: Inter-population differences in reproductive tactics in lubber grasshoppers For many organisms, a trade-off exists between reproductive timing (e.g. age at oviposition) and mass of reproductive output (e.g. number of eggs). Within a species, populations could be predicted to exhibit timing vs. output mass trade-offs that are adapted […]

SPRAFKA, J.B.; CHANG, E.S.; SNYDER, M.J.*: Insulin-Like Growth Factor I (IGF-I) Treatment Results in Time- and Dose-Dependent Increases in Tissue Glucose Levels in the Penaeid Shrimp Sicyonia ingentis Insulin-like growth factors (IGF) are important regulators of vertebrate growth and development. We have previously reported on the identity of IGF-like mRNA in decapod crustacean muscles. The […]

HILL, A.L.*; HILL, M.S; LIUBICICH, D.M.: Insights into early animal evolution: developmental genes in sponges HOM/Hox genes play vital roles in animal development, and a number of researchers have hypothesized that a primordial-Hox gene or a cluster of two or more genes must exist in sponge genomes. A PCR-based strategy using degenerate oligonucleotide primers was […]

MENON, J.; ROBERTS, R.*; DAVILA, I.: Influence of peroxisome proliferator activated receptor (PPAR) and retinoid receptor agonists on tail epidermis and limb buds of Xenopus laevis in vitro. Members of the superfamily of nuclear hormone receptors, which are obligate heterodimeric partners of the retinoid X receptors, may be important in amphibian post-embryonic development. Here, we […]

Buck, C.L.*; Barnes, B.M.: Influence of Staged Encounters on Testosterone and Corticosterone in Free-living Arctic Ground Squirrels In a field study on the North Slope of Alaska we determined levels of plasma testosterone and corticosterone for male arctic ground squirrels after emergence from hibernation in spring, throughout the mating season, and prior to their immergence […]

MANZON, R.G.*; YOUSON, J.H.: In vitro Inhibition of Thyroidal Activity in the Larval Lamprey Endostyle by Potassium Perchlorate. The larval lamprey is unique among vertebrates because it lacks a follicular thyroid gland. In larval lampreys, thyroid hormones are produced in the endostyle, a subpharyngeal gland. Moreover, contrary to the amphibian paradigm, lamprey metamorphosis coincides with […]

KRAJNIAK, KG.*; LU, J.; EDER, S.: Immunohistochemical Localization of Serotonin in the Zebra Mussel,Dreissena polymorpha The zebra mussel, Dreissena polymorpha, is a non-indigenous bivalve mollusc that is present in the waterways of North America. Previous research has shown that the neurotransmitter serotonin or 5-hydroxytryptamine (5-HT) can induce spawning in these animals. In other bivalves serotonin […]