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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hauling-out ： ウィキペディア英語版 Hauling-out Hauling-out is the behaviour associated with pinnipeds (true seals, sea lions, fur seals and walruses), of temporarily leaving the water between periods of foraging activity for sites on land or ice. Hauling-out is necessary in seals for mating (with the exception of the Baikal seal) and giving birth (though a distinction is generally made between reproductive aggregations, termed "rookeries", and non-reproductive aggregations, termed "haul-outs"). Other benefits of hauling-out may include predator avoidance, thermal regulation, social activity, parasite reduction and rest. There is much variety in haul-out patterns among different seal species.〔Hoelzel, A. Rus. (2002). ''Marine Mammal Biology: An Evolutionary Approach''. Blackwell Publishing. ISBN 978-0-632-05232-5. p. 197.〕 Haul-out sites may be segregated by age and sex within the same species.〔Kovacs, Kit M.; Jonas, Krista M.; & Welke, Sylvia E. (1990). Sex and age segregation by ''Phoca vitulina concolor'' at haul-out sites during the breeding season in the Passamaquoddy Bay region, New Brunswick. ''Marine Mammal Science'' 6(3): 204–214.〕 Many species of pinniped have only a few localized rookeries where they breed, but periodically occupy hundreds of haul-out sites throughout the range. For example, the Australian fur seals breed on only nine islands in Bass Strait but also occupy up to 50 haul-out sites in south-east Australian waters,〔Gales, Nick; Gales, Nicholas; Hindell, Mark; & Kirkwood, Roger. (2003). ''Marine Mammals: Fisheries, Tourism and Management Issues''. CSIRO Publishing. ISBN 978-0-643-06953-4. p. 259.〕 and Steller sea lions have around 50 rookeries throughout their range, but several hundred haul-out sites.〔Loughlin, Thomas R.; Rugh, David J.; Fiscus, Clifford H. (1984) Northern Sea Lion Distribution and Abundance: 1956-80 ''The Journal of Wildlife Management'', 48(3):729–740.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hauling-out」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.