HOOPFER, E.D.; DENVER, R.J.*: Synergistic Upregulation of Thyroid Hormone Receptor mRNAs by Thyroid Hormone and Corticosterone in Tadpoles of Xenopus laevis Corticosteroids (CS) potentiate thyroid hormone (T3)-induced metamorphosis in several amphibian species. We tested the hypothesis that corticosterone (B) induces T3 receptor (TR) expression and that this effect is at the level of transcription. Tail […]

CASH, W.B.*; HOLBERTON, R.L.: Stress and the Slider Turtle We examined physiological and behavioral questions related to stress, locomotor activity and dispersal movement in the slider turtle, Trachemys scripta. Like many other vertebrates, slider turtles show a corticosterone response to capture and handling, characterized by an increase in plasma corticosterone concentration with handling time. In […]

JENNINGS, D.H.*; WEISS, S.L.; MOORE, M.C.: Ontogenetic changes in embryonic yolk steroid content in tree lizards: Transfer of hormones from the developing embryo to the yolk? In oviparous vertebrates, hormones that accumulate in the yolk during gametogenesis regulate development and can affect a variety of morphological, physiological, and behavioral traits. We examined yolk steroid hormone […]

Maldonado, T.M.*; Jones, R.E.; Norris, D.O.: Neurodegeneration and amyloidosis in the brain of kokanee salmon (Oncorhynchus nerka kennerlyi) during sexual maturation and senescence. The brain of senescent kokanee salmon exhibits neuropathology similar to that of aging humans (Maldonado et al., Brain Research. 858, 237-251, 2000). Beta-amyloid (ABETA) is distributed regionally in the salmon brain and […]

BOORSE, G.B.; DENVER, R.J.*: Changes in Hypothalamic Corticotropin-Releasing Hormone (CRH) Content During Environmentally-Induced Metamorphosis in the Western Spadefoot Toad (Spea hammondii) Western spadefoot toads (Spea hammondii) are desert dwelling amphibians whose tadpoles can accelerate metamorphosis as their ponds dry, thereby escaping desiccation. Corticotropin-releasing hormone (CRH) may transduce the environmental signal into an endocrine response that […]

JESSOP, T.S.: A review of the rewards for the big, dumb and socially inept: Interactions between the adrenocortical stress response and life-history events of marine turtles. The acute adrenocortical stress response (ASR) is an important defensive mechanism that promotes physiological and behavioural attributes that can increase survival of vertebrates in the face of pervasive stimuli. […]

DAVIDSON, S.K.; KOROPATNICK, T.; KOSSMEHL, R.; MCFALL-NGAI, M.J.: Nitric oxide as a specificity determinant in the squid-Vibrio association During colonization of the Euprymna scolopes light organ, the symbiont Vibrio fischeri aggregates in mucus that is secreted by cells of a complex ciliated field on the surface of the nascent light organ. Once aggregated, the symbionts […]

SHEA, E.K.: Morphology of the Fused Tentacles in Three Ommastrephid Squids. Newly-hatched ommastrephid squids have fused tentacles. The fusion, which initially runs the entire length of the tentacles, divides during ontogeny to form two separate tentacles, the common condition in squids. The fused tentacles of Ommastrephes bartramii(Lesueur, 1821), Stenoteuthis oualaniensis (Lesson, 1830) and Hyaloteuthis pelagica […]

HART, M.W.: Character conflict and life history evolution of marine invertebrates The evolution of marine invertebrate larvae includes numerous adaptive modifications of ancestral, complex, feeding larval forms to produce derived, often simplified, nonfeeding or nonplanktonic larvae. These modifications are taxonomically widespread and suggest numerous convergences in the evolution of modified nonfeeding or nondispersing modes of […]

HOFFMAN, G.G.*; WILBUR, A.E.: A single-step multiplex PCR identification assay to distinguish megalopae of Callinectes sapidus from Callinectes similis in plankton samples. Studying recruitment variation in economically important species such as the blue crab, Callinectes sapidus, requires the collection and processing of large numbers of plankton samples and settlement traps. Long time-course collections can meet […]