Article
Phenotypic flexibility in digestive system structure and function in migratory birds and its ecological significance.
Comparative biochemistry and physiology. Part A, Molecular & integrative physiology - 1 Mar 2001
McWilliams S R, Karasov W H
Abstract excerpt
Birds during migration must satisfy the high energy and nutrient demands associated with repeated, intensive flight while often experiencing unpredictable variation in food supply and food quality. Solutions to such different challenges may often be physiologically incompatible. For example, increased food intake and gut size are primarily responsible for satisfying the high energy and nutrient demands associated...
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