黄海南部春季蓝点马鲛(Scomberomorus niphonius)渔场海洋学特征与渔期渔场分布

FISHERY OCEANOGRAPHY AND SPATIAL-TEMPORAL DISTRIBUTION OF SCOMBEROMORUS NIPHONIUS IN SPRING IN SOUTHERN YELLOW SEA

以国家"973"项目资料和历史资料为基础,研究了黄海南部水域渔业海洋学特征、蓝点马鲛洄游行为及与渔场形成、渔期更迭关系。侧重分析2006和2007年春季水温年际变化对蓝点马鲛渔场、渔期分布的影响。结果表明,相对于2006年冷春,2007年黄海南部水域升温较早,渔汛盛期出现于4月25日,较2006年的5月1日左右明显提前,10℃等温线分布是早春南黄海蓝点马鲛鱼群分布与形成渔场的重要因子,而密集中心渔场往往出现于5月初;文中还讨论了南黄海大沙和吕泗渔场的性质特征,以期为蓝点马鲛渔情预报提供基础资料。

Using available research and historical data in the spring 2006 and 2007, the fishery oceanography of the Southern Yellow Sea was studied for understanding the migratory behavior and the distribution of Scomberomorus niphonius. Study results especially on SST show that the 10℃ isotherm is the ideal fishing season indication as it well matched best the fishing season＇s start. The peak amount of S. niphonius, occurred on May 1, 2006, while it was about a week earlier on April 25, 2007. The highest daily catch ranges 1000-3500kg per average boat shown in early May of the two years. Additionally, the characteristics and functions of two important fishing grounds： Dasha and Lvsi in the Southern Yellow Sea are discussed for providing basic data for fishing forecast.