Dual foraging strategy and chick growth of Streaked Shearwater <i>Calonectris leucomelas</i> at two colonies in different oceanographic environments
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- Ochi Daisuke
- Graduate School of Fisheries Sciences, Hokkaido University
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- Matsumoto Kei
- Graduate School of Fisheries Sciences, Hokkaido University
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- Oka Nariko
- Yamashina Institute for Ornithology
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- Deguchi Tomohiro
- Yamashina Institute for Ornithology
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- Sato Katsufumi
- Atmosphere and Ocean Research Institute, the University of Tokyo
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- Satoh Takashi P.
- Atmosphere and Ocean Research Institute, the University of Tokyo
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- Muto Fumihito
- Atmosphere and Ocean Research Institute, the University of Tokyo
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- Watanuki Yutaka
- Graduate School of Fisheries Sciences, Hokkaido University
説明
Parent Procellariiformes alternate between long-range foraging trips to feed in distant productive marine areas and short-range trips to feed in less productive areas around their breeding colony. Foraging trip duration, diet, energy expenditure, and chick growth of Streaked Shearwaters Calonectris leucomelas were compared between two colonies, one on Mikura Island located in the warm and less productive waters of the Kuroshio current, and the other on Sangan Island located in the cold and more productive waters of the Kuroshio/Oyashio transition zone. Parent shearwaters breeding on Mikura alternated between short (≤3 days) trips to Kuroshio waters in order to provision their chicks and long (>3 days) trips to the cold Oyashio region in order to accumulate energy reserves for themselves. Shearwaters breeding on Sangan mainly took short trips (≤2 days) to the nearby Kuroshio/Oyashio transition zone, but also took longer trips (>2 days) to the cold Oyashio region. Parent shearwaters breeding on Mikura, however, made more frequent long trips (24%) than those breeding on Sangan (9%). Parents at both colonies commonly brought Japanese Anchovy Engraulis japonica and Darkedged-wing Flyingfish Cypselurus hiraii for their young, while parents on Mikura also brought Pacific Saury Cololabis saira and stomach oil after long trips. Parents on Mikura delivered energy at a lower rate, resulting in lower chick growth rates and smaller fledging masses than on Sangan. Unlike other Procellariiformes seabirds, shearwater parents on Sangan accumulate their own body reserves even during the chick rearing period because of better foraging efficiency than on Mikura. This may indicate that chicks were satiated by the meals delivered to them allowing parents to utilize the remaining provisions for their own body reserves.
収録刊行物
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- ORNITHOLOGICAL SCIENCE
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ORNITHOLOGICAL SCIENCE 15 (2), 213-225, 2016
日本鳥学会
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詳細情報 詳細情報について
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- CRID
- 1390282680167041664
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- NII論文ID
- 130005399662
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- ISSN
- 13470558
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可