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Intraspecific variation in nutrient reserve use during clutch formation by lesser scaup

Dates

Year
2001

Citation

Esler, D., Grand, J. B., and Afton, A. D., 2001, Intraspecific variation in nutrient reserve use during clutch formation by lesser scaup: Condor, v. 103, no. 4, p. 810-820.

Summary

We studied nutrient reserve dynamics of female Lesser Scaup (Aythya affinis) to identify sources of intraspecific variation in strategies of nutrient acquisition for meeting the high nutritional and energetic costs of egg formation. We collected data from interior Alaska and combined these with data for Lesser Scaup from midcontinent breeding areas, allowing a range wide analysis for the species. We found little evidence that nutrient reserve use differed between Alaskan and midcontinent Lesser Scaup, except that subarctic birds used a small amount of protein reserves when forming eggs, whereas midcontinent birds did not. Mineral reserves contributed relatively little to the clutch, but endogenous lipid accounted for approximately [...]

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