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题名: Abundance and spatial variation of Ommastrephes bartramii (Mollusca: Cephalopoda) in the Eastern North Pacific: observed from an exploratory survey
作者: Chih-Shin Chen
Tai-Sheng Chiu
贡献者: 國立臺灣海洋大學:海洋事務與資源管理研究所
关键词: spatial distribution
Ommastrephes bartramii
North Pacific
日期: 1999-01
上传时间: 2017-02-07T06:29:35Z
出版者: Acta Zoologica Taiwanica
摘要: Abstract: Data collected from an exploratory cruise to the eastern North Pacific were analyzed to describe the abundance and distributional pattern of the neon flying squid, Ommastrephes bartramii. In total 15 806 kg of the neon flying squid was caught in a 45-d period, with an average of 351.2 kg d -1 . The isopleth diagram of catch per unit effort (CPUE) was used as an index of the abundance, and a significant higher abundance was found around 44° N, 164° W. Water mass characteristics was distinctive in the study area. It is apparent that the high abundance of the squid was linked to relatively low water temperature and low salin- ity. Principal component analysis indicated that water temperature has higher predictive power than salinity to estimate the abundance of neon flying squid. A latitudinal effect on the abundance of squid was confirmed; however no sign of a longitudinal trend was found, i.e., significant high abundance was found patchily. The distribution of neon flying squid in the North Pacific transitional frontal zones is discussed.
關聯: 10(2)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40926
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