Mapping Oregon coast harbor seal movements using wearable devices

phys.org | 7/31/2019 | Staff
srqlolo (Posted by) Level 3
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Wearable devices fitted to harbor seals reveal their movements around the Oregon coast, for a population that has been increasing following the implementation of marine reserves and protection acts. The study publishes July 31, 2019 in the open-access journal PLOS ONE by Sheanna Steingass from Oregon State University, USA, and colleagues.

Approximately 10,000-12,000 harbor seals, Phoca vitulina richardii, make the Oregon coast their home year-round—but there's little data on these seal populations. The authors of the present study investigated the ranges and habitats of these seals.

Steingass - Colleagues - Satellite - Transmitters - Adult

Steingass and colleagues fitted external satellite transmitters to 24 adult harbor seals from Alsea Bay and Netarts Bay in Oregon between September 2014 and April 2015. They collected location data every other month (in order to extend battery life) to evaluate and model the seals' movements, calculating each seal's home range (the area within which they spent 95 percent of their time) and core area (the smaller area where they were especially likely to stay). They also examined how seals used specific habitat and how frequently the seals spent time in five newly-established Oregon marine reserves.

The authors found the average home range for these seals was approximately 364 km2, though individual seals' home...
(Excerpt) Read more at: phys.org
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