Species associations of epipelagic nekton of the North Pacific Ocean, 1978–1993
Species associations of epipelagic nekton of the North Pacific Ocean, 1978–1993
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北太平洋表层游生物的物种群落，1978-1993
DOI：
10.1111/j.1365-2419.1996.tb00013.x
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发表时间：
1996
影响因子：
2.6
通讯作者：
T. Meguro
中科院分区：
文献类型：
--
作者：
W. Pearcy;J. Fisher;G. Anma;T. Meguro
对1978-1993年夏季北海道大学在北太平洋北方大面积海域采集的513个刺网样品进行双向指示种分析（TWINSPAN）和去趋势对应分析（DCA），发现41种上层鱼类和鱿鱼的种类组成存在明显的纬向梯度。鲑类栖息于北方亚北极水域，鲣鱼（Euthynnus pelamis）和飞鱿鱼（Ommastrephes bartrami）栖息于亚北极边界地区，但物种组和样本组之间缺乏明显的界限，主要是因为丰富的物种，如太平洋秋刀鱼（Cololabis saira）和太平洋银鲳（Brama japonica），在夏季迁移到该地区的大部分地区。纵向差异并不明显，但一些物种，包括日本沙丁鱼（Sardinops melanostictus）和日本鳀（Engraulis japonicw），只在西太平洋发现。太平洋秋刀鱼在西太平洋较为常见，而红鲑（Oncorhynchus nerka）则集中在东太平洋。种群纬度的年际波动与海表温度的变化关系最为密切。在西太平洋，1982年，1983年，1985年，1987-88年和1992-93年是凉爽的几年时，亚北极和过渡组合被发现更远的南部比其他年份。温度和盐度在不同深度的高度相关，彼此和第一轴DCA排序得分。通信领域的长期趋势
Strong latitudinal gradients in species composition were revealed by two-way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DCA) of 41 species of epipelagic fishes and squids in 513 gillnet collections by research vessels of Hokkaido University over a huge area of the northern North Pacific during the summers of 1978-1993. Salmonids inhabited northern subarctic water and skipjack tuna (Euthynnus pelamis) and flying squid (Ommastrephes bartrami) inhabited the region of the Subarctic Boundary, but distinct boundaries between species groups and sample groups were lacking, largely because abundant species, such as Pacific saury (Cololabis saira) and Pacific pomfret (Brama japonica), migrated across most of this region during the summer. Longitudinal differences were not pronounced, but some species, including Japanese sardine (Sardinops melanostictus) and Japanese anchovy (Engraulis japonicw), were only found in the western Pacific. Pacific saury was more common in the western Pacific, whereas sockeye salmon (Oncorhynchus nerka) was concentrated in the eastern Pacific. Interannual fluctuations in the latitude of species groups were most closely correlated with changes in sea surface temperatures. In the western Pacific, 1982, 1983, 1985, 1987-88, and 1992-93 were cool years when subarctic and transitional assemblages were found farther to the south than other years. Temperature and salinity at various depths were highly correlated with each other and with first-axis DCA ordinations scores. Long-term trends in commu