English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40649
Visitors : 614407      Online Users : 72
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25081

Title: Geographical Distribution and Abundance of Pacific Saury, Cololabis saira (Brevoort) (Scomberesocidae), Fishing Stocks in the Northwestern Pacific in Relation to Sea Temperatures
Authors: Wen-Bin Huang;Nancy C.H. Lo;Tai-Sheng Chiu;Chih-Shin Chen
Contributors: NTOU:Institute of Marine Affairs and Resource Managemen
Keywords: Geographical information system;Sea surface temperature;Cololabis saira;Fishing ground;Taiwan
Date: 2007
Issue Date: 2011-10-20T08:21:14Z
Publisher: Zoological Studies
Abstract: abstract:We compared geographical distributions of Pacific saury, Cololabis saira (Brevoort) (Scomberesocidae), fishing stocks in the Northwest Pacific (NWP) for 3 yearly groups of high, average, and low abundances, using the Taiwanese fishery catch per unit effort (CPUE) data from 1994 to 2002. Two migratory groups, inshore and offshore, were found in averageand low-abundance years, while an additional oceanic migratory group, which spread eastward to around 178°E in Oct., was found in the year of high abundance. Most of the saury groups were distributed in areas
where the sea surface temperature (SST) ranged between 10 and 20°C with a high aggregation around 15°C, implying that 15°C is the preferred temperature for saury to aggregate intensively for the commencement of the spawning migration, and to move southward to spawning grounds where SSTs of around 20°C are favorable to their offspring. The timing, abundance, and geographical distributions of fish aggregations of migratory saury were associated with SSTs. In the early stages of the fishing season, apparent warming caused by the intrusion of Kuroshio Current waters in the southern NWP was closely related to delayed aggregation and low abundances of the saury stock; in contrast, cooling of the waters affected by Oyashio waters was related to eastward aggregation and high abundances of saury. High saury abundances occurred in low-temperature areas.
Specifically, in years of low CPUE values, sea water temperatures (SWTs) of the fishing grounds were higher than 15°C, while in years of average and high CPUE values, the SWTs of the fishing grounds were < 15°C. Therefore, fishing ground SWTs higher than 15°C (around 16°C SST) is an indicator of low stock abundances of saury in the NWP.
Relation: 46(6), pp.705-716
URI: http://ntour.ntou.edu.tw/handle/987654321/25081
Appears in Collections:[海洋事務與資源管理研究所] 期刊論文

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback