Remage-Healey, L.; Romero, L.M.: Corticosterone and insulin interact to regulate glucose and lipid concentrations during stress in starlings undergoing molt. Captive starlings ( Sturnus vulgaris ) undergoing a prebasic molt (the costly replacement of body feathers) were given exogenous insulin and corticosterone (CORT) to determine how counterregulatory hormones alter glucose and triglycerides during stress. Experiments […]

Moshel-Lynch, S.*; Collier, J.: Conservation of Mesodermal-specific Genes in Molluscs While bilateral symmetry is the ancestral state of molluscs, the gastropods have adopted various developmental pathways leading from bilateral symmetry to complex asymmetrical body plans. Because many of the asymmetrical organ systems are mesodermal derivatives the identification of mesodermal regulatory genes is essential for understanding […]

PARKER, S.C.J.; daSILVA, J.; STELLWAG, E.J.*: Computational Method for Identification of Functionally Significant Non-Coding Sequences: Studies of Hox Cluster Organization A question of considerable interest to evolutionary developmental biologists is the linkage between gene architecture and spatio-temporal expression patterns during embryogenesis. The prevailing hypothesis is that this linkage results from a network of interacting cis-regulatory […]

MENDONCA, M.T.; TRUCKS, K.T.: Comparison of aromatase activity in female yellow-blotched map turtles from contaminant impacted vs. reference sites Yellow-blotched map turtles, Graptemys flavimaculata, from a portion of the Pascagoula River drainage system in Mississippi, USA, impacted by paper mill efflent, exhibit low reproductive rates. Significantly fewer females from a historically contaminated site develop second […]

Taylor,M.H.*; Callaway, S.B.: Comparative analysis of ovarian contraction in some teleost fish. Contraction of ovaries has been demonstrated in the mummichog, Fundulus heteroclitus and several other teleosts. We have expanded this information by recording spontaneous contractions and the response to acetylcholine in ovaries of the striped killifish, Fundulus majalis, the Atlantic silverside, Menidia menidia, and […]

DZIALOWSKI, E.*; VON PLETTENBERG, D.; ELMONOUFY, N.; BURGGREN, W.: Chronic Hypoxic Effects on Metabolism and Hematology in Developing Chicken Embryos Chicken embryos wereexposed to chronic hypoxia (PO2 ~ 131 mmHg) during development, and assessed for detrimental metabolic effects and the ability to repair them. Eggs were incubated in one of four groups: untreated (i.e. 155 […]

Elf, P.K.*; Fivizzani, A.J.: Changes in Sex Steroid Levels in the Yolks of the Leghorn Chicken, Gallus domesticus, During Embryonic Development We have hypothesized that yolk hormones play a role in sexual differentiation in species with temperature-dependent sex determination (TSD), in which incubation temperature determines the sex of the offspring. To compare possible differences in […]

CHUNFA, W.; PATINO, R.*; DAVIS, K.B.: Cellular Distribution of Estrogen Receptor ALPHA and BETA Transcripts in the Testis of Channel Catfish The cellular distributions of estrogen receptor ALPHA (ER-ALPHA) and ER-BETA in the testis have not been determined and compared in non-mammalian vertebrates. In this study, we examined the cellular distributions of ER-ALPHA and ER-BETA […]

SHERMAN, M.L.*; MOORE, P.A.: Boundary-layer Effect on the Chemical Signal Movement along the Body of the Brown Bullhead Flow speed influences the spatial and temporal distribution of a chemical signal. However, a boundary layer exists around the olfactory appendages and can further influence the distribution of chemical signal. The goal of this research is to […]

McIntyre, J.C.*; Moore, P.A.: Boundary-layer Effect on the Chemical Signal Movement Across the Antennae of the Male Antherea polyphemus Male A. polyphemus use pheromones in order to locate females. The male detects the pheromones after it moves through the antennae. The antennae of the male are large and very plumose, and therefore have a significant […]