English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40649
Visitors : 619979      Online Users : 79
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/987654321/39669

Title: Seasonal Dynamics of Flatfish Assemblage in Coastal Waters off Northeastern Taiwan: with Implications for Shift in Species Dominance of the Ecosystem
Authors: Shyh-Bin Wang;Wen-Kwen Chen;Shoou-Jeng Joung
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: flatfish;seasonal assemblage;species dominance;fishing pressure
Date: 2013-12
Issue Date: 2016-12-26T08:27:20Z
Publisher: Journal of Marine Science and Technology
Abstract: Abstract:The seasonal dynamics of flatfish assemblage in the coastal waters off northeastern Taiwan was examined based on samples collected between March 2004 and March 2005 taken by bottom trawlers and landed at Da-Shi fishing port, Yilan county. A total of 28 species from 5 families and 18 genera were found. The Bothidae was the most dominant family, accounting for 81% of the total catch, while the most dominant species was the Pseudorhombus pentophthalmus. Species richness and diversity were high between the end of fall and the end of spring, but low in summer. Multivariate analyses based on cluster and nonparametric multi-dimensional scaling identified three seasonal assemblages as follows: late-spring to summer, fall to mid-winter, and late-winter to mid-spring. The two dominant species in each assemblage were the same, namely P. pentophthalmus and Cynoglossus kopsii. Rare or less abundant species were found to account for most of the differences among seasonal assemblages. The overwhelming dominance of one or two species suggests that monitoring of ecosystem change may be possible using these species. In addition, in this region a striking increase has been observed in both flatfish catch (3.5 folds from 2001 to 2007) and catch percentage (2.5 folds from 2002 to 2008), during the period when total landings of trawl fisheries either remained stable (2002-2007), or declined (after 2007). These findings may be due to the increase of fishing pressure and may reflect changes in the community structure of demersal fish in the region.
Relation: 21, pp.23-30
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39669
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

Files in This Item:

File Description SizeFormat
10232796-201312-201403170032-201403170032-23-30.pdf775KbAdobe PDF59View/Open

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