... of their social role, and thus to colony fitness. The proximate mechanisms responsible for these metabolic differences remain poorly understood. Here, we investigated the effects of age, worker class and dietary macronutrients on the abdominal activity of fatty acid synthase (FAS), the enzyme responsible for de...

... of membrane fatty acids to cope with decreasing pH along with shell bleaching impairing shell integrity and consequently animal fitness. Finally, our work revealed species-specific physiological responses and highlights that intertidal C. gigas seem to have a better acclimation potential to rapid and extreme...

...Shahar Dubiner; Amit Kashi; Ariel Drabkin; Pablo Blinder; Eran Levin ABSTRACT Dietary fatty acids (FAs) have been demonstrated to be differentially stored or used as a metabolic fuel, depending on carbon chain length or saturation level. However, intestinal absorption also differs among FAs...

... whether thermal acclimation altered liver mitochondrial respiratory capacity or the composition and amount of IMM. We measured changes in phospholipid headgroups and headgroup-specific fatty acid (FA) remodeling, and used respirometry to assess mitochondrial respiratory capacity. Acclimation to 5°C and 33...

... with that of the pheromone component. In Lepidoptera, AAC is allocated to amino acid, carbohydrate and lipid in eggs ( O'Brien et al., 2002 ; Telfer, 2009 ). We used allocation to de novo -synthesized fatty acids in eggs (and ovaries) as a proxy for AAC allocation to eggs because: (1) fats are a major component of H...

... of the analogous leghemoglobin of plants. The possible role of myoglobin in intracellular fatty acid transport is addressed. Finally, the recent measurements of myoglobin diffusion inside muscle cells are discussed in terms of their implications for cytoarchitecture and microviscosity in these cells...

.... * Author for correspondence at present address: Department of Biology,University of California, Riverside, CA 92521, USA (e-mail: [email protected] ) 6 11 2007 © The Company of Biologists Limited 2008 2008 bat carbohydrate energetics fatty acid stable isotope In evolving...

... for correspondence (e-mail: [email protected] ) 24 7 2007 © The Company of Biologists Limited 2007 2007 fatty acid metabolism lipid mass spectrometry glycerophospholipid reptile mammal endothermy ectothermy The resting metabolic rates of endothermic vertebrates, such as mammals...

... conditions. To simulate overwintering, animals were held at 0°C, 4°C and 9°C for 3 months and then gradually brought to and maintained at 20°C for 5 weeks to simulate spring–summer conditions. Changes in lipid class and fatty acid composition were related to clearance rate and oxygen consumption. We found...

... glucose is oxidized compared with fatty acid oxidation. Because the energy required to produce aerodynamic lift for hovering is independent of the metabolic fuel oxidized, we hypothesized that the rate of oxygen consumption, V̇ O 2 , should decline as the respiratory quotient, RQ( V̇ CO 2 / V̇ O 2...

... a sequential response of the phospholipid to sterol ratio as well as in levels of 22:6n-3 and non-methylene interrupted dienoic fatty acids. Hard clams showed an increase in 20:5n-3 as temperature decreased, but this was not maintained during overwintering, which suggests that 20:5n-3 may have been used...

...A. Chatelier; N. Imbert; J. L. Zambonino Infante; D. J. McKenzie; P. Bois SUMMARY The present study employed a patch clamp technique in isolated seabass ventricular myocytes to investigate the hypothesis that oleic acid (OA), a mono-unsaturated fatty acid, can exert direct effects upon whole-cell...

...A. Chatelier; D. J. McKenzie; A. Prinet; R. Galois; J. Robin; J. Zambonino; G. Claireaux SUMMARY Seabass were fed for 4 months with diets where the lipid was provided as either canola oil (CO), palm oil (PO) or fish oil (FO), to generate diversity in their tissue fatty acid (FA) composition...

.... No study to date has examined the thermally induced compositional changes of raft and non-raft regions of the PM separately. In this study we have measured the phospholipid class composition and fatty acid composition of raft-enriched (raft) and raft-depleted PM (RDPM) of hepatocytes from trout...

..., with phosphatidyleserine and phsophatidylethanolamine contributing only 13% and 15%, respectively. More importantly, P. schlosseri increased the cholesterol level (to 5.5 μmol g -1 ) and altered the fatty acid composition (increased total saturated fatty acid content) in its skin lipid after exposure to ammonia (30 mmol l...

... embryo to serve these functions. Studies with birds, reptiles and insects have described lipid metabolism in adults and in eggs, but no studies have addressed how lipids are distributed in developing organs in the embryo. Here we show that maternal fatty acid and phospholipids segregate differently...

... of SMF, using an in vitro bioassay, has led to it being putatively identified as the 20-carbon fatty acid 8,11,14-eicosatrienoic acid and this paper describes the induction of spawning in vivo by injection of 8,11,14-eicosatrienoic acid into sexually mature individuals. It is shown that spawning in male...