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本文根据1977～1982年浙江中部渔场,水文要素观测资料,分析了渔场环境与冬汛带鱼鱼发的关系。由于在冬汛中游经浙江中部渔场的带鱼属季节性回游,对海洋环境的变化比较敏感。因此,在渔汛期内,应用渔场水文的季节转换、水温的冷暖年分布,水系混合区的纬向波动等,分别可作为判断汛期进展及中心渔场变化和转移的指标;(1)渔场水文夏、冬季节转换期早,汛期提前;相反,汛期后延。(2)渔场水温呈“冷年型”分布,汛期提早;相反,汛期推迟。(3)34‰等盐线的纬向波动,与中心渔场有明显的相关性。高盐线分布偏西,鱼发海区趋向近岸;反之,趋向远岸。
Based on the observation data of fisheries and hydrological elements in the middle part of Zhejiang Province from 1977 to 1982, this paper analyzes the relationship between the fishery environment and the fish in the winter flood season. Due to the seasonal migration of ocellatus in the middle reaches of Zhejiang in winter flood season, it is more sensitive to the changes of the marine environment. Therefore, during the fishing season, the seasonal change of hydrology, the warm and cold year distribution of water temperature, and the zonal fluctuation of the mixing area in the fishery may be used as indicators to judge the progress of the flood season and the changes and transfer of the center fishery. (1) , The winter season transition period early, the flood season in advance; the opposite, the flood season postponed. (2) The fishery water temperature showed a “cold year” distribution with an earlier flood season; on the contrary, the flood season was postponed. (3) The latitudinal fluctuations of salt such as 34 ‰ have obvious correlation with the central fishery. The distribution of high salt line is westward, and the sea of fish tends to nearshore; on the contrary, it tends to the far shore.