Differences in Breeding Success between Neighbouring Streaked Shearwater Subcolonies Correlate with Egg Size and Quality of Parental Care

Annette L. Fayet; Masaki Shirai; Sakiko Matsumoto; Aimee Van Tatenhove; Ken Yoda; Akiko Shoji

doi:10.2326/osj.18.195

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27 January 2020 Differences in Breeding Success between Neighbouring Streaked Shearwater Subcolonies Correlate with Egg Size and Quality of Parental Care

Annette L. Fayet, Masaki Shirai, Sakiko Matsumoto, Aimee Van Tatenhove, Ken Yoda, Akiko Shoji

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Ornithological Science, 18(2):189-195 (2020). https://doi.org/10.2326/osj.18.195

Abstract

To identify drivers of local variation in breeding success in colonial seabirds, we studied the role of breeding phenology and parental quality on the breeding performance of two neighbouring subcolonies of Streaked Shearwaters Calonectris leucomelas, with similar habitat but different success. Egg dimension and parental quality during incubation, but not phenology, predicted hatching success. Birds at the low-success colony laid smaller eggs, reared smaller chicks and neglected eggs more frequently, leaving them vulnerable to predation. Our findings suggest that local variation in breeding performance in this species arises from differences in breeding quality, perhaps driven by age or experience.

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Annette L. Fayet, Masaki Shirai, Sakiko Matsumoto, Aimee Van Tatenhove, Ken Yoda, and Akiko Shoji "Differences in Breeding Success between Neighbouring Streaked Shearwater Subcolonies Correlate with Egg Size and Quality of Parental Care," Ornithological Science 18(2), 189-195, (27 January 2020). https://doi.org/10.2326/osj.18.195

Received: 30 July 2018; Accepted: 28 November 2018; Published: 27 January 2020

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