National Taiwan Ocean University Institutional Repository:Item 987654321/51077
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题名: Loggerhead turtle (Caretta caretta) movement off the coast of Taiwan: characterization of a hotspot in the East China Sea and investigation of mesoscale eddies
作者: Donald R. Kobayashi
I-Jiunn Cheng
Denise M. Parker
Jeffrey J. Polovina
Naoki Kamezaki
George H. Balazs
贡献者: 國立臺灣海洋大學:海洋生物研究所
日期: 2011-03
上传时间: 2018-11-09T07:11:19Z
出版者: ICES Journal of Marine Science
摘要: Abstract: Satellite tags were attached to 34 non-reproductive loggerhead turtles (Caretta caretta) caught as bycatch in the Taiwanese coastal poundnet fishery from 2002 to 2008. Transmission durations ranged from 6 to 503 d (median 172 d), with 5860 d tracked in total. Horizontal track data were processed using the Bayesian state-space modelling to extract the most likely daily positions, taking into account ARGOS data quality and other forms of statistical error. A region of high occupancy in the East China Sea, covering 433 549 km2 of coastal and pelagic area next to Taiwan, China, Japan, and South Korea, was characterized from the tracking data. Various attributes of this hotspot are described using satellite tracks and remotely sensed data. The tracks were merged with oceanographic data, emphasizing a new global dataset characterizing mesoscale eddies from satellite altimetry data. A proximity-probability approach coupled with odds ratio testing was used to infer orientation to eddy features. Comparisons against random points, simulated particle tracks, and drifter buoys were used to demonstrate turtle differential responses to eddies inside and outside the hotspot, depending on eddy features (i.e. cyclonic vs. anticyclonic, edges vs. centres). Turtles inside the hotspot utilize fewer strong cyclonic eddy edges than those outside.
關聯: 68(4) pp.707-718
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51077
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