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Covers

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Full Issue
Studies in Avian Biology

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Front Matter
Studies in Avian Biology

Contents

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Contents
Studies in Avian Biology

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Preface
Frank A. Pitelka

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Sex Ratio Skew and Breeding Patterns of Gulls: Demographic and Toxicological Considerations
D. Michael Fry, C. Kuehler Toone, Steven M. Speich, and R. John Peard

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Survivorship and Mortality Factors in a Population of Western Gulls
Larry B. Spear, Teresa M. Penniman, Jay F. Penniman, Harry R. Carter, and David G. Ainley

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Effects of Increased Population Size in Herring Gulls on Breeding Success and Other Parameters
Arie L. Spaans, Alle A. N. de Wit, and Marianne A. van Vlaardingen