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First published online March 2, 2006
Journal of Experimental Biology 209, 1058-1063 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02122
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Sex differences in food intake and digestive constraints in a nectarivorous bird

Shai Markman1,*, Hagar Tadmor-Melamed1,2, Amichai Arieli2 and Ido Izhaki1

1 Department of Biology, Faculty of Science and Science Education, University of Haifa at Oranim, Tivon, 36006, Israel
2 Department of Animal Science, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot 76100, Israel


Figure 1
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  		Fig. 1. The relationship between volumetric food intake in male and female Palestine sunbirds (males represented by filled circles and solid regression line; females represented by open circles and broken regression line) and (A) sucrose concentration (sucrose equivalents) of their diet (males, y=4.85x–0.59, r2=0.83; females, y=4.52x–0.59, r2=0.72) or (B) glucose + fructose concentration (sucrose equivalents) of their diet (males, y=25.32x–1.07, r2=0.91; females, y=21.28x–1.06, r2=0.96).

 

Figure 2
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  		Fig. 2. The relationship between gut transit time (mean ± s.e.m.) in male (filled columns) and female (open columns) Palestine sunbirds and the concentration of their (A) sucrose solution (sucrose equivalents) or (B) glucose + fructose solution (sucrose equivalents) diets.

 




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