... and resistance to oxidative stress during fasting. However, the cellular mechanisms that regulate these adaptations are still not fully understood. To examine how metabolic coordination is achieved during prolonged fasting, we profiled changes in blubber, skeletal muscle and plasma proteomes of adult female NES...

... in the intestines, skin and liver. Across these tissues, we found many differentially expressed transcripts involved in small molecule transport and metabolism, as well as sodium channels and other ion pumps. We then used proteomic approaches to quantify plasma proteins, where we found several protein abundance...

..., we also tested hemolymph plasma alone. Plasma viscosity also decreased as temperature increased, but did not exhibit two slope regimes, suggesting that particulates strongly influence low-temperature shifts in viscosity values. These results suggest that as environmental temperatures decrease...

... conducted until the point of isotopic steady state with a diet. We kept six leopard sharks in captivity for 1250 days, measured their growth, and serially sampled plasma, red blood cells and muscle for stable carbon and nitrogen isotope analysis. A single-compartment model with first-order kinetics...

... and/or injections were used to manipulate corticosteroid activity and plasma ammonia concentrations in ureotelic toadfish. Metyrapone treatment to lower circulating cortisol levels resulted in a 3.5-fold elevation of ammonia excretion rates, enhanced mRNA expression of two of the toadfish Rh isoforms (Rhcg1...

... of ureotelic (crowded) toadfish ( Walsh and Milligan, 1995 ). Under these circumstances, ammonia liberated from post-prandial catabolic processes would begin to accumulate in the plasma and eventually translate into elevated rates of ammonia excretion, as was the case in the present study. This pattern is also...

... secretion during digestion). Plasma metabolites (glucose, urea and ammonia) were measured at various time points before and after voluntary feeding to satiation (approximately 5% body mass meal of dry commercial pellets), as was the net flux of ammonia and titratable alkalinity to the water from unfed...

... of rainbow trout to repeat a critical swimming speed ( U crit ), as assessed by two consecutive critical swimming speed tests separated by a 40 min rest interval. An additional expectation was that certain plasma ionic, metabolic and humoral parameters would be correlated with how well fish reperformed...

... pH, the product of αCO 2 and and the apparent [HCO 3 − ] (i.e. the sum of all ionic CO 2 species). αCO 2 and pKa are sensitive to the temperature, pH and/or the ionic strength of the reaction medium. αCO 2 and pKa of normal mammalian blood plasma have been well defined over a range...

... in the partial pressure of oxygen and hemoglobin oxygen-carriage and a significant increase in the partial pressure of CO 2 in arterial and venous blood. Although the total CO 2 concentration of the plasma decreased after exercise, erythrocyte total CO 2 concentrations increased. In venous blood, the immediately...

...Helve Hōbe ABSTRACT The physiological responses of white sucker (Catostomus commersoni Lacépède) and rainbow trout (Salmo gairdneri Richardson), both reared in natural soft water, to a reduction in ambient pH were compared by simultaneous analyses of ion levels in various body compartments (plasma...

...A. J. Mcvicar; J. C. Rankin ABSTRACT Values for the total plasma protein concentration of different teleost species range from 3·5–7·0 g% ( Field, Elvelhjem & Juday, 1943 ; Fine, Boffa & Drilhon, 1963 ; Larsson & Lewander, 1972 ; Hargens, Millard & Johansen, 1974...