English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40649
Visitors : 649976      Online Users : 75
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/987654321/34189

Title: Trends in trawl-targeted species landings off northern Taiwan and effects of fishing and environmental factors
Authors: Chih-Shin Chen;Bei-Wen Lee
Contributors: NTOU:Institute of Marine Affairs and Resource Managemen
Keywords: Dynamic factor analysis (DFA), East China Sea, Fisheries management, Landing trends, Northern Taiwan, Southern Oscillation Index (SOI)
Date: 2013-03
Issue Date: 2013-10-07T02:04:46Z
Publisher: Fisheries Science
Abstract: abstract:Time series of landings may provide information
crucial to achieving a better understanding of temporal
variations in the abundances and compositions of exploited
species and ecosystems. The waters off northern Taiwan,
located in the southern East China Sea, are one of the most
important fishing grounds for Taiwan’s coastal and neritic
fisheries. Temporal variations in the abundances of the
species exploited in this region are rarely studied because
of the multi-gear fisheries involved. In this study, trends in
the landing per unit effort (LPUE) time series for 13 trawltargeted
species (groups) off northern Taiwan from 1976 to
2007 were explored using dynamic factor analysis (DFA).
Potential effects of fishing effort (number of vessels) and
environmental factors [Southern Oscillation Index, sea
surface temperature (SST) near northern Taiwan, and river
discharge] were examined. The optimum DFA model
included three common trends and three explanatory variables
(excluding SST). A general decreasing pattern was
identified from among the common trends, and this was
observed in the LPUE time series for most of the species.
Fishing effort is an important explanatory variable in the
model, suggesting that it plays a critical role in explaining
LPUE variations of trawl-targeted species. The common
trends identified here could lead to new strategies for
fisheries management, particularly where multi-gear fisheries
operate and multiple species are targeted.
Relation: 79(2), pp.163-176
URI: http://ntour.ntou.edu.tw/handle/987654321/34189
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