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In this study, we observed the behavior of two age groups of harbor seal (Phoca vitulina richardii), i.e., yearlings, which often become bycaught and individuals 2 yr or older, during their stays at salmon set nets at Cape Erimo, Japan. From July to November 2011–2015, acoustic receivers that track tagging seals were attached to three set nets located near the haul‐out site. Our observations showed...
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