... much more poorly understood, perturbant of cell membrane structure. Previous studies in fish and marine microbes have reported correlations with temperature and depth of membrane-fluidizing lipid components, such as polyunsaturated fatty acids. Because little has been done to isolate the separate...

... signaling but elevated TOR kinase activity, a manipulation known to reduce lifespan. We also identify a sexually dimorphic effect of larval hypoxia on adult nutrient storage and mobilization. Thus, we find that males, but not females, show elevated levels of lipids and glycogen. Moreover, we see that both...

...Jorge de Costa; Gustavo Barja; Pedro F. Almaida-Pagan ABSTRACT The lipid composition of cell membranes is linked to metabolic rate and lifespan in mammals and birds but very little information is available for fish. In this study, three fish species of the short-lived annual genus Nothobranchius...

... partially fuel migratory flight with ingested nutrients. Changes in energy intake, digestive capacity, liver lipid metabolism and body temperature regulation may contribute to migratory fattening. Although control of appetite is similar in birds and mammals, neuroendocrine mechanisms regulating seasonal...

... salinity shifted the predominant fuel use for burrowing from proteins to lipids. Our data indicate that the reduced burrowing performance of clams under the salinity stress is not due to the limitations of energy availability or aerobic capacity but must involve other mechanisms (such as impaired muscle...

...Alex M. Champagne; Heather C. Allen; Joseph B. Williams ABSTRACT The outermost 10–20 µm of the epidermis, the stratum corneum (SC), consists of flat, dead cells embedded in a matrix of intercellular lipids. These lipids regulate cutaneous water loss (CWL), which accounts for over half of total...

... developmental stages and to examine whether the effects were more pronounced in larval stages developing in the open ocean. Oxygen consumption rate, total protein, dry mass, total lipids and C/N were determined in late-stage embryos, zoea I larvae and newly settled juveniles reared in ambient pH (7.93±0.06...

..., University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, Canada, R3B 2E9 ( [email protected] ) 22 3 2012 8 11 2012 © 2013. Published by The Company of Biologists Ltd 2013 Chiroptera digestive organ exercise organ lipids hoary bat Lasiurus cinereus migration...

...Stephen J. Trumble; Shawn R. Noren; Leslie A. Cornick; Thomas J. Hawke; Shane B. Kanatous SUMMARY Our objective was to elucidate age-related changes in lipids associated with skeletal muscle of Weddell seals and to suggest possible physiological implications. Muscle biopsies were collected from...

... in larger mammals suggests an increased presence of membrane lipid rafts in larger mammals. The results of this study support the proposal that the physical properties of membranes are likely to be involved in changing metabolic rate. * Author for correspondence (e-mail: [email protected] ) 17 7...

... while simultaneously providing a structural support for lipids, which comprise the principal barrier to cutaneous water efflux in terrestrial taxa. Whereas lipids are of fundamental importance to water barriers, the efficacy of these barriers depends in many cases on structural features that enhance...

... The Company of Biologists Limited 2004 2004 metabolic depression fuel selection lipids protein sparing metabolic rate oxygen consumption energy expenditure food deprivation woodchuck Marmota monax rabbit Coping successfully with prolonged periods of fasting depends on two key...

..., partially characterised and tested for their inhibitory effect on the K + -dependent p -nitrophenol phosphatase ( p NPPase) activity of tilapia ( Oreochromis mossambicus ) gill basolateral membrane. Thin-layer chromatography of the lipids from dichloromethane:methanol extracts of M. aeruginosa PCC 7820...