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Glycerol and NEFA kinetics in long-term fasting king penguins: phase II versus phase III

S. F. Bernard, C. Fayolle, J.-P. Robin and R. Groscolas*

Centre d'Ecologie et Physiologie Energétiques, Centre National de la Recherche Scientifique, 67087 Strasbourg, France



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  		Fig. 1. Glycerol (A) and palmitate (B) specific activities during the final 60 min of 2-[3H]glycerol and 1-[14C]palmitate infusion. Closed circles, solid line, phase II; open triangles, dotted line, phase III. Values are means ± S.E.M. for 8 (phase II) and 9 (phase III) birds.

 


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  		Fig. 2. Regressions of rates of appearance (Ra) of glycerol (A) and NEFA (B), expressed per unit of fat mass (FM) on plasma concentration. Each symbol represents an individual observation. Closed circles, phase II; open triangles, phase III. Differences in regression slopes for the two fasting phases were tested with an analysis of covariance (ANCOVA), using the glycerol or NEFA concentration x phase of fasting interaction as factor. Differences in intercept were tested for with an ANCOVA, with the fasting phase as factor.

 

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© The Company of Biologists Ltd 2002