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An East-West Comparison of the Transition Zone Coastal Pelagic Nekton of the North Pacific Ocean

机译：北太平洋过渡带沿海浮游Nekton的东西向比较

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During the 1980s and 1990s, scientific research cruises were conducted in both the eastern and western boundary regions of the North Pacific Ocean. The main purpose of these cruises was to examine the abundance and distribution patterns of juvenile salmon in coastal waters. These studies created one of the most extensive databases ever collected on the species composition of coastal Transition Zone epipelagic nekton in the North Pacific Ocean. Catch data from two purse seine and two surface trawl surveys (one each from off northern Japan and eastern Russia and off the West Coast of the U.S.) were examined using multivariate techniques to analyze the community structure of nektonic cephalopods, elasmobranchs, and teleosts in the coastal zone during the summer and autumn months. Juvenile salmonids are generally among the most common species caught, but in terms of overall abundance, other potential competitors with juvenile salmon, such as small squids and clupeoid fishes predominated the catches. Species diversity and dominance varied among areas and gear types. Distinct assemblages were found in each area, but the two regions had closely related species occupying similar ecological positions in each habitat.
机译：在1980年代和1990年代，在北太平洋的东部和西部边界地区进行了科学研究航行。这些航行的主要目的是研究沿海水域中鲑鱼的丰度和分布方式。这些研究创建了有史以来最广泛的数据库之一，该数据库收集了北太平洋沿岸过渡带上上生性神经元的物种组成。使用多元技术检查了两次围网围网捕捞和两次表面拖网调查（每次来自日本北部和俄罗斯东部以及美国西海岸附近）的捕捞数据，以分析中枢神经元头足类，弹性分支和硬骨鱼类的群落结构。夏季和秋季的几个月是沿海地区。幼体鲑鱼通常是最常见的捕获种类，但就总体丰度而言，幼体鲑鱼的其他潜在竞争者（如小乌贼和类鳞鱼）占主导地位。物种的多样性和优势地位随区域和齿轮类型的不同而不同。在每个区域发现了不同的组合，但是两个区域的密切相关的物种在每个栖息地中占据相似的生态位置。

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