Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
2004-03-01 |
タイトル |
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言語 |
en |
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タイトル |
Monitoring the behavior and multi-dimensional movements of Weddell seals using an animal-borne video and data recorder |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Davis,Randall W.
Hagey,William
Horning,Markus
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著者所属(英) |
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en |
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Department of Marine Biology, Texas A&M University at Galveston/Pisces Design/Department of Marine Biology, Texas A&M University at Galveston |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
We have developed an animal-borne video and data recorder to observe Weddell seals foraging and to reconstruct their three-dimensional movements. The video and data recorder consists of a low-light-sensitive video camera with near-infrared light-emitting diodes that is mounted on top of the seal's head to obtain close-up images of the seal's muzzle and the area in front of the animal. The main housing, which is mounted on the animal's back, contains an 8-mm video tape recorder that can record for 6 h, batteries, a microcomputer and transducers for pressure, water speed, compass bearing, and flipper stroke frequency. Sound is recorded on one audio channel of the tape recorder with a hydrophone. Using these instruments, we have recorded over 500 h of underwater video and over 1000 three-dimensional dive paths with corresponding swimming performance data from 31 adult Weddell seals. We have documented seals foraging in the water column, on the sea floor, and at the under-ice surface. Mid-water foraging included encounters with large Antarctic toothfish and smaller Antarctic silverfish. Multivariate statistical analysis of variables derived from the temporal and spatial characteristics of three-dimensional dive paths have enabled us to classify dive types and, in some cases, assign a function such as foraging. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 58,
p. 148-154,
発行日 2004-03
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