Development of the Axial Skeleton in the Zebrafish, Danio rerio

BIRD, N.C.*; MABEE, P.M.: Development of the Axial Skeleton in the Zebrafish, Danio rerio Although the zebrafish, Danio rerio, is used extensively as a model organism for genetic and developmental studies, no data on the developmental morphology of the vertebral column and associated structures are available. Using whole mount staining we are developing a baseline […]

Corticosterone response to variable doses of dexamethasone, CRF and ACTH in the European Starling (Sturnus vulgaris)

RICH, E.L.*; ROMERO, L.M.: Corticosterone response to variable doses of dexamethasone, CRF and ACTH in the European Starling (Sturnus vulgaris) Captive European Starlings were used to determine dose-dependant responses of the Hypothalamus-Pituitary-Adrenal (HPA) axis to exogenous ACTH, CRF or dexamethasone (dex). Ten wild starlings were held in the laboratory on a short-day photoperiod (11L:13D). Between […]

Corticosterone regulation of plasma steroid-binding globulin levels and free steroid hormone levels in Tree lizards, Urosaurus ornatus

JENNINGS, D.H.*; RUYS, J.D.; MOORE, M.C.; ORCHINIK, M.: Corticosterone regulation of plasma steroid-binding globulin levels and free steroid hormone levels in Tree lizards, Urosaurus ornatus. In vertebrates, steroids circulate bound to specific plasma steroid-binding globulins. Binding globulins potentially regulate steroid actions at a number of levels including steroid metabolism, availability of free steroids, and tissue-specific […]

Computer simulations of larval behavior in wave-driven flow predict settling usccess in resposne to soluble cues

STROTHER, James*; KOEHL, M.A.R.; REIDENBACH, Matthew; HADFIELD, Michael G.: Computer simulations of larval behavior in wave-driven flow predict settling usccess in resposne to soluble cues Can chemical cues in the water affect the settlement of larvae of benthic marine invertebrates in habitats subjected to the wave-driven water flow that characterizes many coastal habitats? We addressed […]

Circulating steroid hormone levels during high and low density nesting periods in the Green Turtle, Chelonia mydas in Oman

ALKINDI, Abdulaziz Y.A.; MAHMOUD, Ibrahim Y.; BATCHELOR, Christopher; KHAN, Hamid R.: Circulating steroid hormone levels during high and low density nesting periods in the Green Turtle, Chelonia mydas in Oman Plasma steroid levels (progesterone, testosterone and estradiol) were monitored during high (June-October) and low (November-May)density nesting periods at Ras Al-Hadd, Oman. The examined turtles had […]

Choriolytic enzyme in the California grunion fish, Leuresthes tenuis

RUMBLE, J.*; MARTIN, K.; VANDERGON, T.: Choriolytic enzyme in the California grunion fish, Leuresthes tenuis The grunion Leurethes tenuis, a southern California fish, has the only known vertebrate eggs that do not hatch unless presented with a mechanical trigger. Grunion fish spawn terrestrially on the spring tide, leaving their eggs to incubate in the sand. […]

Chemical detection of reproduction condition by the hermaphroditic shrimp Lysmata wurdemanni

GIRI, T*: Chemical detection of reproduction condition by the hermaphroditic shrimp Lysmata wurdemanni In the caridean shrimp Lysmata wurdemanni, individuals are initially male but with increasing age become simultaneous functional hermaphrodites. Larger individuals in a population are therefore able to mate as either males or females. Although mating as a “male” can occur throughout the […]

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