PRICE, R. M.: Evaluating a putative neogastropod adaptation: is there a functional relationship between columellar folds and the columellar muscle? Malacologists traditionally assume that columellar folds, ridges inside a gastropod shell, offer a functional advantage. Two functional hypotheses for the existence of folds are frequently cited in the literature, but neither has been rigorously tested. […]

PETERSEN, A.M.; GLEESON, T.T.; SCHOLNICK, D.A.: The influence of oxygen and adenosine on lizard thermoregulation Anapyrexia is a regulated drop in internal body temperature (Tb) employed across taxa in a protective role against metabolic trauma. A clear mechanism responsible for anapyrexia has yet to be determined. This study examined the possibility that anapyrexia is initiated […]

ETNIER, S.A.*; DEAROLF, J.L.; MCLELLAN, W.A.; PABST, D.A.: Postural control of lateral flexibility in neonatal dolphins (Tursiops truncatus) En utero, fetal bottlenose dolphins (Tursiops truncatus) are bent laterally such that the tail flukes and throat are juxtaposed. Dolphins begin swimming immediately after birth, yet the dorsoventral oscillations required to swim may be compromised by the […]

GROVE*, T J; SIDELL, B D: Examining Substrate Specificity of Fatty Acyl CoA Synthetase in Notothenioid Fishes Oxidative muscle tissues of Antarctic notothenioid fishes are more dependent upon lipids than carbohydrates as their main fuel for aerobic energy metabolism. These tissues further oxidize mono-unsaturated fatty acids more readily than saturated fatty acids. We hypothesize that […]

GARLAND, T.*; MORGAN, M.T.; SWALLOW, J.G.; RHODES, J.S.; GIRARD, I.; CARTER, P.A.: Evolution of a Small-muscle Polymorphism in Lines of House Mice Selected for High Activity Levels We conducted artificial selection to study the correlated evolution of locomotor behavior and exercise physiology. From the outbred Hsd:ICR strain, we began 8 closed lines, each of 10 […]

ROMBACH, E.P.*; BARBOZA, P.S.; BLAKE, J.E.: Trace Mineral Reserves during Gestation in Muskoxen We studied a captive population of muskoxen (Ovibos moschatus) that experienced reduced growth and development of young (likely caused by copper, Cu, deficiency) to better understand stages of development where trace minerals are critical for survival of young. We examined the role […]

SCHONDUBE, J.E.*: Nectar digestion by flowerpiercers and hummingbirds Flowerpiercers and hummingbirds are the two most specialized groups of nectar feeding birds in the neotropics. Because species of both groups are syntopic and can even be found feeding on the same plants, they provide a unique opportunity to study how different taxa cope with a nectar […]

BARBOZA, P.S.; JORDE, D.G.: Male and female black ducks respond differently to intermittent feeding in winter Feeding is limited by predation and weather during winter, migration and breeding of black ducks (Anas rubripes). Restricted food intake can affect body composition, molt and egg production of waterfowl. We studied responses of captive birds to restricted feeding […]

CHEDIACK, J.G.; CAVIEDES-VIDAL, E.; KARASOV, W.H.: Intestinal passive absorption of hydrosoluble compounds is size dependent and modulated by luminal nutrients in house sparrows (Passer domesticus). We are characterizing the apparent paracellular permeability of the small intestine in intact birds. We previously found that L-glucose was substantial and enhanced by the presence of sugar in the […]

PIERCE, Barbara/J; MCWILLIAMS, Scott/R: Effects of Food Quality and Digestive Constraints on Recovery of Body Reserves in a Migratory Bird Small songbirds must regularly rest and refuel at stopover sites during migration, in part because they are unable to carry enough fuel reserves for long-distance, non-stop flights. Length of stay at a given stopover site […]