Dissertation/ Thesis
Seasonal movement patterns of streaked shearwaters Calonectris leucomelas during the non-breeding period
| العنوان: | Seasonal movement patterns of streaked shearwaters Calonectris leucomelas during the non-breeding period |
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| المؤلفون: | 山本 誉士, ヤマモト タカシ, Takashi YAMAMOTO |
| سنة النشر: | 2012 |
| المجموعة: | The Graduate University for Advanced Studies, Japan: Sokendai Repository |
| الوصف: | Organisms in polar and temperate regions live in a seasonal environment where they experience regular changes in resources and/or weather conditions. Exploring how organisms respond to seasonality in environment, and what kind of environmental characteristics influence their distributions is fundamental for understanding their habitat requirements as well as adaptations in behaviour, physiology and morphology to the environment. Recent advances in tracking technologies enable us to examine the foraging movements of a variety of seabird species during the breeding season, and to identify inter-specific and sexual segregations as well as individual consistency in foraging area. In contrast, seabird distributions outside the breeding season are much less documented due to the technical and practical difficulties. Therefore, understanding of how individual seabirds respond to seasonal changes in the marine environment during the non-breeding period, and if such the response differs between sexes, among colonies, or within individuals has been elusive. The aims of this study were to examine the seasonal movement patterns of a pelagic seabird, the streaked shearwater (Calonectris leucomelas), during the non-breeding period (including post-breeding, migration, wintering, and pre-laying periods) in relation to (1) seasonal changes in the marine environment, (2) sex-related, inter- and intra-colony, and inter-annual differences, and (3) individual consistency over successive years.The study was conducted at three breeding colonies, Sangan Island (39°18’N, 141°58’E, Iwate, Japan) and Mikura Island (33˚52΄N, 139˚14΄E, Izu Islands, Japan) located in the Pacific Ocean, and Awa Island (38°27’N, 139°13’E, Niigata, Japan) located in the Sea of Japan, from August 2006 to October 2010. I recorded the seasonal movement patterns of streaked shearwaters during their non-breeding period using leg-mounted global location sensors. I obtained data of 223 tracks, including 47 birds that tracked over two successive years.Streaked ... |
| نوع الوثيقة: | thesis |
| اللغة: | English |
| Relation: | https://ir.soken.ac.jp/?action=repository_uri&item_id=3136; http://id.nii.ac.jp/1013/00002996/; 総研大甲第1509号 |
| الاتاحة: | https://ir.soken.ac.jp/?action=repository_uri&item_id=3136 http://id.nii.ac.jp/1013/00002996/ |
| رقم الانضمام: | edsbas.6A71930D |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |