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Effects of dietary aluminum, calcium, and phosphorus on egg and bone of European starlings

Archives of Environmental Contamination and Toxicology

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Abstract

Egg and bone of passerine birds nesting in acidified habitats may be affected by high levels of Al or P, or low levels of Ca. Nine treatments of three levels of dietary Al (target levels of 200, 1,000, and 5,000 ?g/g) and three levels of Ca:P (target levels of NN = 1.3% Ca: 0.9% P; LL = 0.19 Ca:0.45 P; LH = 0.19 Ca:1.65 P) were fed to 16-17 starling pairs during two breeding seasons. Eggs of starlings fed the LH diet were smaller and weighed less than eggs from the NN and LL treatments. Treatment effects on thickness, strength, and weight of eggshells were not consistent between seasons, probably because of differences in actual dietary levels of AI, Ca, and P or in incubation intervals. In one season, birds fed the highest Al diet had thicker eggshells than those from the other Al treatments (no effect from Ca:P); the following season, eggshells from the NN and LH treatments were thicker and stronger than those from the LL treatment. Eggshells from the NN treatment weighed more than those from the other Ca:P treatments. Starlings on the LH diet had the strongest femurs, but the effect was interactive with different levels of dietary AI. Effects of Ca:P on egg and bone were more evident than Al effects.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effects of dietary aluminum, calcium, and phosphorus on egg and bone of European starlings
Series title:
Archives of Environmental Contamination and Toxicology
Volume
24
Issue:
2
Year Published:
1993
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
206-212
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
206
Last page:
212
Number of Pages:
7