黄渤海蓝点马鲛种群变动与海表面温度的关系

Relationship Between Population Dynamics of Scomberomorus niphonius and SST in Bohai Sea and Yellow Sea

本文基于1992—2012年黄渤海海域蓝点马鲛(Scomberomorus niphonius)渔获量,利用实际种群分析方法推算了蓝点马鲛再生产成功率(Recruitment Per Spawner,RPS),并研究了其与黄渤海海表面温度(Sea Surface Temperature,SST)的关系。研究表明,蓝点马鲛RPS与SST于4月在长江口附近海域负相关性较强,于5月在海州湾与长江口附近负相关性较强,于6月在辽东湾、莱州湾、海州湾负相关性较强,于8—11月在黄海西南部海域负相关性较强,以上相关性均达0.6以上(P<0.05)。根据负相关性较强区域的出现位置与时间,推测过高的SST抑制了性成熟成鱼产卵和当年幼鱼的摄食过程,从而影响次年的补充量,导致RPS降低。研究结果可为我国海洋渔业的保护、管理和开发提供一定的理论参考与数据支撑。

Based on the catching data in Bohai Sea and Yellow Sea collected from 1992 to 2012,and temperatures deduced from the East Asian marginal seas hydrodynamic model,we analyzed the relationship between the recruitment per spawner(RPS)and sea surface temperature(SST)using the virtual population analysis(VPA)method.It showed that RPS was negatively associated with SST near Yangtze Estuary in April,Haizhou Bay and Yangtze Estuary in May,Bohai Bay,Laizhou Bay and Haizhou Bay in June,and the southwestern area of Yellow Sea from August to November.The correlation reached 0.6(p<0.05).The larger correlation coefficient area corresponded to the spawning ground and feeding route at the same time.The reason was that the excessive SST that limits the range of spawning and food leads to the reduction of RPS.Our results can provide a theoretical reference and a data support for the protection,management and development of marine fisheries.