Lotz, C.N.: Effects of nectar concentration on water balance, osmoregulation, and thermoregulation in a nectar-feeding sunbird The water balance of nectar-feeding animals is inextricably linked to their energy balance. Because nectar secreted by bird-pollinated flowers can be dilute, birds can be forced to consume high volumes of water to satisfy their energy demands. I examined […]

Piermarini, P.M.*; Evans, D.H.: Effect of salinity on expression of the vacuolar proton-ATPase B-subunit in the gills of a euryhaline stingray (Dasyatis sabina) The vacuolar proton-ATPase (V-H-ATPase) is an important ion transporter that is responsible for energizing a variety of active transport processes in animals. Recently, the V-H-ATPase has been considered alikely transporter for driving […]

Van Voorhies, W. A.: Broad oxygen tolerance in the nematode Caenorhabditis elegans. I studied the effects of oxygen tensions ranging from 0 to 90 kPa on the metabolism, movement, and survivorship in the free-living, soil nematode Caenorhabditis elegans. C. elegans requires oxygen to develop and survive. However, it can maintain a normal metabolic rate at […]

HERBERHOLZ, J.; ISSA, F.A.; EDWARDS, D.H.: The Role of Tailflip Behavior in Crayfish During Dominance Hierarchy Formation. When placed together in a limited space, crayfish engage in agonistic interactions that lead to formation of social dominance hierarchies. The interactions feature attacks, where one animal physically assaults another with its claws, approaches, where no contact occurs, […]

MOTZ, A.M.; WOLCOTT, T.G.*; WOLCOTT, D.L.; HINES, A.H.: Sperm Limitation and Operational Sex Ratio in Blue Crabs. To understand whether the intense fishery on male blue crabs (Callinectes sapidus) is leading to sperm limitation and reduced reproductive potential in Chesapeake Bay populations, we are investigating whether the number of males, or their adequacy as mates, […]

Dickey, B.: Prediction and description of interaction patterns in social dominance structures Though social dominance hierarchies have been demonstrated and studied in a wide variety of vertebrate and invertebrate taxa, no models exist that explain or predict which animals should interact aggressively within a hierarchy. Data from empirical studies of social dominance are often presented […]

MATHEWS, L.M.: Evolution of social monogamy in snapping shrimp Social monogamy in the absence of biparental care is a topic of interest, as it is predicted to be rare by parental investment theory, yet it occurs in a broad range of taxa. Most or all caridean shrimp of the genus Alpheus occur in heterosexual pairs, […]

Mahon, A.R.*; Amsler, C.D.; McClintock, J.B.; Baker, B.J.: Chemo-tactile predator avoidance responses of the antarctic limpet, Nacella concinna The antarctic limpet Nacella concinna has the ability to escape potential predation by the highly mobile and predaceous sea star Neosmilaster georgianus. When the sea star comes into contact with the limpet, the limpet undergoes characteristic avoidance […]

Vess, T.J.*; Frederik, H. Nijhout: Unraveling the Evolution of Color Pattern: Exploring Sources of Variation in Coccinellid Spots Development is the vehicle by which genetic and environmental inputs affect morphology and is critical for accurate interpretation of the evolution of Coccinellid color pattern. Ladybug spots are of particular interest because the genetics and the distributions […]

DAHLGREN, T.G.; WEINBERG, J.R.; HALANYCH, K.M.*: Phylogeography of the ocean quahog (Arctica islandica): influences of paleoclimate on genetic diversity and species range The ocean quahog, Arctica islandica (Linnaeus, 1767), is a commercially important bivalve found on continental shelves throughout much of the North Atlantic. To assess genetic subdivision in this species, we sequenced 385 nucleotides […]