open access

https://hdl.handle.net/2115/14758

携帯電話ネットワークを利用した、襟裳岬におけるゼニガタアザラシのテレメトリー調査

英語

diving behavior

2006

Japanese Society of Livestock Management and Japanese Society for Applied Animal Behaviour, 日本家畜管理学会, 応用動物行動学会

Animal Behavior and Management

42(3)

181-189

We developed a tracking unit that uses the Japanese mobile phone network to transmit data from Kuril harbor seals (Phoca vitulina stejnegeri), which are difficult to recapture. The unit senses location by GPS, hauling-out status, depth and temperature. Six wild Kuril harbor seal pups were tracked at Cape Erimo, Japan, in summer. GPS data indicated that the seals hauled out only on insular rocks in a known haul-out site at Cape Erimo. Although the data of hauling-out status were limited in accuracy, they at least indicated the seals often hauled out both at daytime and at nighttime. The depth logs of four of the seals were analyzed. The greatest depth recorded was 131m. Of the depth logs >1 m, 98% were <50 m. The seals may tend to use deep water when nearshore water is rough. Three of four seals tended to have depth logs distributed at about 30 m. The seals tended to spend more time at shallow depths at night than at other times.

学術雑誌論文

Version of Record

1880-2133