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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25645

Title: The temporal and spatial change in position of squid fishing ground in relation to oceanic features in the northeastern waters of Taiwan
Authors: Cheng-Hsin Liao;Ming-An Lee;Yan-Chi Lan;Kuo-Tien Lee
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: Squid;AVHRR;SST;Kuroshio;GIS
Date: 2006
Issue Date: 2011-10-20T08:24:49Z
Publisher: Journal of the Fisheries Society of Taiwan
Abstract: abstract:We studied the squid fishing ground and satellite imageries of the northeastern waters of Taiwan, southern East China Sea, during the period of 1998-2001. Two obvious oceanic features, offshore thermal front and upwelling eddy that varied seasonally, were examined by using image edge detection function. The nearest distance of offshore thermal (or chlorophyll) front away from the coastline of Mainland China and the upwelling size (standard deviation) were generally within the range of 92 to 259 km and 643 to 2920 km2, respectively. The monthly CPUEs and the spatial fishing position of torch-lighted squid fishery by season were varied with time. The CPUE was positively related with both the nearest distance of offshore thermal front to Mainland China and the size of upwelling eddy. In spring and summer, the fishing grounds were simultaneously formed n the shelf and coastal waters in the southern East China Sea. Its position was also anomaly varied and moved northward to the periphery of the upwelling during summer, as the upwelling was enhanced by passing typhoons. In autumn, the fishing ground was significantly formed further south in the vicinity of upwelling. Our result showed that location of the squid fishing ground was associated not only with oceanographic conditions of an extended area influenced by the Kuroshio, but also with local and instantaneous oceanographic environments (such as typhoon) in the southern East China Sea.
Relation: 33(2), pp.99-113
URI: http://ntour.ntou.edu.tw/handle/987654321/25645
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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