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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25112

Title: Preliminary estimation of seabird bycatch of Taiwanese longline fisheries in the Pacific Ocean
Authors: Hsiang-Wen Huang;Ke-Yang Chang;Ju-Ping Ta
Contributors: NTOU:Institute of Marine Affairs and Resource Managemen
Keywords: seabird bycatch;longline;Pacific Ocean;Taiwan;observer
Date: 2008
Issue Date: 2011-10-20T08:21:19Z
Publisher: The 9th Stock Assessment Review Meeting of Inter-American Tropical Tuna Commission
Abstract: abstract:To collect scientific information for target species as well as incidental catch species, Taiwan has launched observer programs since 2002. There were 23 observer trips from 2002 to 2006 in the Pacific Ocean large scale tuna longline fleets. The coverage rate by trips was 3.5% in average. The observed days were 1590. According to the data collected, the seabird incidental catch rate (BPUE) in each 5*5 degree grid square varied from 0 to 0.76 per 1000 hooks with the average BPUE of 0.054 per 1000 hooks. As for the seabird incidental catch distribution, the BPUE was the highest in the areas between25-40 N and 165 W to 165 E and between 25-35 S and 165-180W. On the contrary, the BPUE was low in tropical area. By using the total efforts data estimated from logbooks and the seabird BPUE from observers, the preliminary estimated average number of seabird incidental catch was around 1500 per year. The observer data showed the set up of bird scaring lines could reduce the incidental catch of seabird effectively.
Relation: IATTC-SARM-9-11c
URI: http://ntour.ntou.edu.tw/handle/987654321/25112
Appears in Collections:[海洋事務與資源管理研究所] 演講及研討會

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