Read Andrew J, Waples Danielle M, Urian Kim W, Swanner Dave
Nicholas School of the Environment and Earth Sciences, Duke University Marine Laboratory, 135 Duke Marine Lab Road, Beaufort, NC 28516, USA.
Proc Biol Sci. 2003 Aug 7;270 Suppl 1(Suppl 1):S90-2. doi: 10.1098/rsbl.2003.0021.
We studied the fine-scale behaviour of bottlenose dolphins Tursiops truncatus around gillnets in North Carolina, USA, during May and June 2002. We made observations from an overhead digital video camera, suspended from a helium-filled aerostat, tethered 70 m above a fishing vessel. We positioned the camera above a gillnet set for Spanish mackerel Scomberomorus maculatus. We observed frequent encounters (n = 36) and interactions (n = 27) between dolphins and the net, but no dolphins became entangled. Most dolphins diverted their course around the net, but on nine occasions we observed dolphins engaging in depredation. We conclude that interactions between dolphins and these gillnets are common, but that entanglement is rare.
2002年5月和6月期间，我们在美国北卡罗来纳州研究了宽吻海豚（Tursiops truncatus）在刺网周围的精细行为。我们通过一台架设在氦气球上的高空数字摄像机进行观察，氦气球系在一艘渔船上方70米处。我们将摄像机置于一张用于捕捞斑点马鲛（Scomberomorus maculatus）的刺网上方。我们观察到海豚与刺网之间频繁相遇（n = 36）和互动（n = 27），但没有海豚被缠住。大多数海豚会绕网改变路线，但有九次我们观察到海豚进行了掠夺行为。我们得出结论，海豚与这些刺网之间的互动很常见，但被缠住的情况很少见。
