东海鲐鱼资源时空分布特征

Spatial-temporal distribution characteristic of chub mackerel(Scomber japonicus)resource in the East China Sea

利用1998年1月～2006年12月我国东海鲐鱼灯光围网生产统计数据和月平均海水表层温度SST及表温距平均值,利用GLM模型对其单位日产量CPUE进行标准化,然后对其资源时空分布进行了分析。结果表明:其CPUE与年份、月份、纬度、船队、表温及年份与纬度和年份与船队之间的交互效应有关。CPUE的年际变化与SST间有着显著的相关性。秋季是东海鲐鱼资源丰度最高的季节,渔业分布范围进一步拓展,资源的丰度也比夏季更高,且东海西北部的丰度较高:l0月份,东海鲐鱼的分布范围又出现回缩,仅在东海中部水域有渔业分布,但资源的丰度也为四个季节中最高。

Using the data of chur mackerel fishery （January 1998 to December 2006） provide by Squid Fishery Working Group of Distant Waters Fishery Association of China and the data of monthly average sea surface temperature （SST） and monthly average sea surface temperature anomaly （SSTA） obtained fi＇om Physical Oceanography Distributed Active Archive Center, National Aeronautics and Space Administration, the present study analyze the spatial-temporal distribution of chur mackerel resource in the East China Sea based on standardized CPUE （Catch Per Unit Effort） of chur mackerel fishery with GLM （General Linear Model）. The results show that 1） The main effects （year, month, latitude, fishery fleet and SST） and the interaction effects （year to latitude and year to fishing fleet） have impacts on CPUE of chur mackerel in the East China Sea. 2） Annual variation of chur mackerel abundance has a significant correlation to SST. 3） The abundance of chur mackerel resource is increasing to the highest level fi＇om the summer to the autumn and the distribution of chur mackerel fishery is extend to wider range, the abundance of chur mackerel resource is higher in the northwestern East China Sea. The distribution range ofchur mackerel resource is rebound to only the central part of East China Sea, however the abundance is the highest in four seasons.