BARBOZA, P.S. ; JORDE, D.G.: Effects of winter diet on enrichment of 13C & 15N in ducks Waterfowl select many foods during winter but depletion of lipid and conservation of protein may delay the effect of diet on body tissues. We predicted that retention of dietary isotopes would vary among tissues of black ducks (Anas […]

MARRON, M.T.; MARKOW, T.A.; KAIN, K.J.; GIBBS, A.G.*: Effects of stress on energy metabolism in Drosophila. Laboratory selection experiments have indicated that energy metabolism is an important focus of stress resistance in Drosophila melanogaster. Selection for starvation resistance results in increased lipid storage, and desiccation selection results in increased carbohydrate storage. This suggests that different […]

OJEDA-AVILA, T; WOODS, HA; RAGUSO, RA: Effects of dietary variation on growth, composition, and maturation of Manduca sexta Most experimental studies linking dietary variation with insect fitness have focused narrowly on single dietary ingredients and late larval growth. We examined the effects of variation in multiple dietary factors over most life stages of the sphingid […]

DANTZLER, A.S.*; BURNETT, K.G.; BURNETT, L.E.: Effects of Hypercapnic Hypoxia and Respiratory Burst Inhibition on the Bactericidal Activity of Hemocytes from the Penaeid Shrimp Litopenaeus vannamei The high densities of shrimp found in aquaculture ponds cause dissolved oxygen levels to fall below 30% air saturation. Low oxygen is usually accompanied by increased carbon dioxide and […]

FARRAR, R.S.*; RODNICK, K.J.: Effect of anabolic steroids on performance of isolated ventricle strips from rainbow trout,Oncorhynchus mykiss As rainbow trout reach sexual maturity, plasma levels of sex hormones increase and then decline to undetectable levels in postspawning fish. Previous studies have indicated that these hormones may play a role in stimulating growth of cardiac […]

BENDER, G.*; MURRAY, B. P.; CLARK, K.; GILBERT, S. F.: EVIDENCE FOR THE NEURAL CREST ORIGIN OF THE TURTLE PLASTRON The migrating cranial neural crest cells of birds, fish, and mammals have been shown to form the membranous bones of the cranium and face. These findings have been extrapolated to suggest that all the dermal […]

ANDZIAK, B.A.*; BUFFENSTEIN, R.; O’CONNOR, T.P.: Does antioxidant enzyme activity explain the extended longevity of naked mole-rats? Aging decreases organismal performance by impairing normal physiological function. Although the proximate mechanisms remain to be elucidated, many of the deleterious effects of aging are attributed to accumulation of molecular oxidative damage. Lifetime accrual of damage is due […]

O’CONNOR, T.P.; GIBBS, C.; KUROIWA, K.: Do New York house finches utilize metabolic seasonal acclimatization? Winter in temperate climates represents a significant energetic challenge for small birds. Most species show a form of metabolic acclimatization that results in improved cold tolerance, although the specific mechanisms for this response remain unknown. Previous studies of house finches […]

O’GRADY, S.P.; DEARING, D.M: Digestive Efficiency in a Small Herbivorous Lizard Assimilation of plant material has been well studied in large lizard herbivores that possess morphological adaptations specialized to a herbivorous diet. The efficiency with which small less specialized lizards assimilate plant material has been largely unstudied. We studied digestibility in Cnemidophorus murinus, a small […]

GONSALVES-JACKSON, D.C.: Developmental strategies in opisthobranch mollusks across the Isthmus of Panama The embryonic/larval developmental period of invertebrates is a significant component of life history, influencing population distribution, recruitment, genetic variation, and extinction. A dichotomy in developmental patterns has been documented in gastropods, bivalves and bryozoans where a higher incidence of planktotrophy occurs in the […]