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First published online March 31, 2007
Journal of Experimental Biology 210, 1325-1334 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.02745
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What comes first, the zebra finch or the egg: temperature-dependent reproductive, physiological and behavioural plasticity in egg-laying zebra finches

Katrina G. Salvante1,*, Rosemary L. Walzem2 and Tony D. Williams1

1 Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada
2 Poultry Science Department, Texas A and M University, College Station, TX 77843, USA


Figure 1
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  		Fig. 1. Comparisons of changes in (A) female body mass, (B) female fat score and (C) female muscle score from pairing to clutch completion, (D) daily seed consumption of breeding pairs throughout laying, (E) modal VLDL particle diameter and (F) the proportion of VLDL particles that fell within the sVLDLy range in females producing eggs at 7°C and 21°C. Lines join values for individual females and open circles represent means.

 

Figure 2
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  		Fig. 2. Relationships between female body mass at the 1-egg stage and the mean mass of subsequently laid eggs at 7°C and 21°C.

 

Figure 3
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  		Fig. 3. Temperature-induced changes in (A) residual mean egg mass (corrected for female body mass at the 1-egg stage), (B) clutch size, (C) laying interval, (D) laying rate, (E) yolk lipid content and (F) yolk protein content of the second egg of females producing eggs at 7°C and 21°C. Lines join values for individual females and open circles represent means.

 




© The Company of Biologists Ltd 2007