Species composition and diversity of pelagic fishes based on a longline fishery catch in the North Pacific Ocean

作     者：朱江峰 戴小杰 陈勇 

作者机构：College of Marine SciencesShanghai Ocean University The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries ResourcesMinistry of Education School of Marine SciencesUniversity of MaineOronoME 04469USA 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2011年第29卷第2期

页      面：261-269页

核心收录：

学科分类：0710[理学-生物学] 090803[农学-渔业资源] 0908[农学-水产] 0707[理学-海洋科学] 09[农学] 0815[工学-水利工程] 

基　　金：Supported by the China National Fishery Observer Program the Shanghai Leading Academic Discipline Project (No. S30702) 

主　　题：species composition diversity pelagic fish longline North Pacific Ocean 

摘      要：Evaluation of spatial-temporal variability of species composition and diversity in oceanic ecosystems is not easy because it is usually difficult to obtain sufficient data quantifying such *** this study,we examined pelagic species diversity indicators,species richness,Shannon-Wiener index of diversity and Hurlbert s species evenness,for fish assemblages from two areas(north and south) in the North Pacific Ocean(2°±12°N,178°E±165°W) during May±July *** assemblages were based on data collected by an onboard scientific observer during a commercial longline fishing *** species richness and Shannon-Wiener diversity index of fish assemblages in the northern area were slightly higher than those in the southern area,although these differences were not significant(t test,P.0.05).Non-parametric multidimensional scaling and analysis of similarities indicated that there were significant differences in fish assemblages between the two areas(P,0.01).