SORENSEN, JS; MCLISTER, J; DEARING, MD: The impact of dietary toxins on locomotion in mammalian herbivores Ingestion of plant secondary compounds is a physiological challenge for mammalian herbivores. The detoxification of plant secondary compounds can impose severe energy constraints via increased metabolic demands and energy excretion as well as decreased energy intake. We hypothesized that […]

CLEARY, M.E.; MARSH, R.L.; ELLERBY, D.J.; BUCHANAN, C.I.: Maximal oxygen consumption in running Guinea fowl. Maximal oxygen consumption (VO2, max) during running has been measured in numerous mammals, but few values exist for birds. VO2, max provides an important benchmark for judging the metabolic effort required at a particular speed. Published values of VO2, max […]

CHAPPELL, Mark A; HAMMOND, Kimberly A: Maximal aerobic capacity in combined cold and exercise in deer mice Small endotherms must expend energy on both thermoregulation and locomotion, and often the two demands occur simultaneously. Several studies have investigated whether energy costs of thermoregulation and locomotion are additive or if metabolic heat produced by locomotor activity […]

O’CONNOR, T.P.; SCHULTERS, R.; ANDZIAK, B.A.; PIERCE, V.A.: Effect of cold-acclimation on metabolism, body composition and glycolytic enzymes in mice Both acute and chronic cold exposure result in increased metabolic rate in endotherms, as they try to maintain their body temperature. Increased metabolic rates, both chronic and acute, are produced by increased flux through catabolic […]

KORINE, C*; VATNICK, I; VAN TETS, I. G.; PINSHOW, B: Can Egyptian fruit bats (Rousettus aegyptiacus) alter their urine composition in response to environmental change? We tested the hypothesis that the Egyptian fruit bats, Rousettus aegyptiacus under conditions of high-energy demands and high water intake save energy by increasing the proportion of ammonia in their […]

BLANK, J.M.*; MORRISSETTE, J.M.; MASSAROTI, H.; BLACKWELL, S.B.; BLOCK, B.A.: Physiology & Biochemical Characteristics of Pacific & Atlantic Bluefin Tuna Hearts Electronic tagging data indicates that bluefin tunas encounter a wide range of environmental temperatures from 2 to 30°C while maintaining endothermic muscle and visceral temperatures of 23-30°C. The hearts of bluefin operate at ambient […]

JOHNS, G.C.*; SOMERO, G.N.: Evolution of A4-lactate dehydrogenase in warm-stenothermal environments: investigating biochemical adaptation in damselfishes (Pomacentridae). Building on previous work elucidating the nature of biochemical adaptation of muscle-type lactate dehydrogenase (A4-LDH) in cold-stenothermal Antarctic Notothenioids and eurythermal gobies, we investigated functional differences associated with evolution in a warm-stenothermal environment. To address this, we analyzed […]

PRUITT, Nancy L.; SHAPIRO, Craig: Evidence for a cryoprotective protein in freeze tolerant larvae of the goldenrod gall fly, Eurosta solidaginis Third instar larvae of the goldenrod gall fly, Eurosta solidaginis, overwinter in a ball gall on the stem of the goldenrod, Solidago spp., where they are exposed to a wide range of environmental extremes. […]

MUELLER, P.J.: Desert rodents stockpile food in the form of body fat. Seasonal, nutritional and age-related factors influencing body composition are frequently studied, but there is less information on species-level variation across habitat types. Because of the unpredictable distribution of food resources in xeric environments, desert-dwelling rodents might accumulate greater fat reserves than their mesic-zone […]

POSNER, M.*; LOW, S.; RUNKLE, S.; KANTOROW, M.; HORWITZ, J.: Chaperone function of the small heat shock protein alpha crystallin in the zebrafish, Danio rerio Alpha crystallin is a small heat shock protein expressed primarily in the ocular lens of all vertebrate taxa. In the mammalian lens this protein plays a role in preventing cataracts […]