Electronic Monitoring of Seabird Interactions with Trawl Third-wire Cables on Trawl Vessels - A Pilot Study
作者： J. Schrader , H. McElderry , S. Davis , J. Illingworth , D. McCullough
DOI:
关键词: Species identification 、 Fishing 、 Winch 、 Marine engineering 、 Environmental science 、 Exclusive economic zone 、 Marine research 、 Closed circuit 、 Fisheries science 、 Seabird
摘要: Archipelago Marine Research Ltd. was selected by the Alaska Fisheries Science Center to test electronic monitoring (EM) equipment for possible use examine seabird interactions with trawl third-wire cables on vessels. This pilot study involved field testing of EM systems shoreside delivery and head gut bottom vessels conducting operations in Bering Sea, U.S. Exclusive Economic Zone. systems, consisting two closed circuit television cameras, GPS, hydraulic winch sensors, on-board data storage, were deployed five fishing 14 trips during a one-month period fall 2002. Detailed analysis about 200 hours imagery occurred, representing 20 vessel events 32 fleet events. Results from demonstrated that could effectively monitor cables. The system provided sufficient quality detect presence, abundance, general behavior seabirds most daylight As well, EM-based also able entanglements although it not determine cause these entanglements. very useful enumeration species identification. In regard third-wires, would be suitable effectiveness mitigation measures.
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