Gong Yeong, Suh Young Sang
National Fisheries Research and Development Institute, 152-1, Haean-ro Gijang-up Gijang-gun, Busan 619-750, Republic of Korea.
J Environ Biol. 2013 Jan;34(1):23-30.
Effects of ocean climate changes on the population structure and abundance of Pacific saury (Cololabis sira) were investigated on the basis of climate indices, sea surface temperature (SST) anomalies, catch and body size information from the Tsushima Warm Current (TWC) region (Yellow Sea, East China Sea and East/Japan Sea) during the period 1950-2010. It is suggested that oceanic regime shifts in the early 1970s, late 1980s and late 1990s occurred in the TWC region in winter, but the regime shifts in the mid-1970s and in the late 1980s were not evident in the spring SST anomaly series. The abundance and body size of Pacific saury fluctuated in association with the winter oceanic changes in the TWC region. The catch rates and abundance of large size saury were far bellow average during their northward migrations in the TWC region in the years with abnormally cool winters (e.g., 1963, 1970, 1977, 1981-1989 and 2006) and above average in the years with warm winters. These patterns demonstrate decadal-scale variations together with large inter-annual fluctuations in the structure and abundance of Pacific saury in association with the climatic-oceanic changes. These results, along with an alternation of dominant pelagic fish species, indicate the status of the saury population in the TWC region is in good condition, similar to that in the Kuroshio-Oyashio Current (KOC) region during the warm regime after the late 1980s climate regime shift.
基于气候指数、海表温度（SST）异常、对马暖流（TWC）区域（黄海、东海和东/日本海）1950 - 2010年期间的渔获量和鱼体大小信息，研究了海洋气候变化对太平洋秋刀鱼（Cololabis sira）种群结构和丰度的影响。结果表明，20世纪70年代初、80年代末和90年代末冬季在TWC区域发生了海洋状态转变，但在春季SST异常序列中，70年代中期和80年代末的状态转变并不明显。太平洋秋刀鱼的丰度和鱼体大小随TWC区域冬季海洋变化而波动。在冬季异常寒冷的年份（如1963年、1970年、1977年、1981 - 1989年和2006年），TWC区域大型秋刀鱼向北洄游期间的渔获率和丰度远低于平均水平，而在暖冬年份则高于平均水平。这些模式显示出年代际尺度的变化，以及与气候 - 海洋变化相关的太平洋秋刀鱼结构和丰度的大幅年际波动。这些结果，连同主要中上层鱼类物种的交替，表明TWC区域秋刀鱼种群的状况良好，类似于20世纪80年代末气候状态转变后暖期的黑潮 - 亲潮区域（KOC）。
