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利用2007/2008年和2008/2009年南极夏季高速采集器和IKMT网走航采样样品,结合同步环境调查资料,研究了南极大磷虾(Euphausia superba)的水平分布、生长状况及种群结构。结果表明,南极大磷虾在威德尔海域丰度高于普里兹湾海域,两个海域的磷虾丰度都低于历史同期。从两个年度南极考察的整个调查海区来看,南极大磷虾处于正常生长状态,但也存在个别生长状况较差站位,推测与海冰回退时间较晚或叶绿素浓度较低有关。利用高速采集器采集的大磷虾样品,在海冰边缘区域站位,未成体磷虾占有很大比例;而在海冰已经消退较长时间的海域,成体磷虾占比例较大,这反映了大磷虾未成体与成体不同的分布特征。南极大磷虾在不同海域种群结构存在一定的差异,对种群补充产生一定的影响。
Using the sampling data of Antarctic summer high-speed harvester and IKMT network in 2007/2008 and 2008/2009, the horizontal distribution, growth status and population structure of Euphausia superba were studied with simultaneous environmental survey data. The results showed that the abundance of Antarctic krill in Weddell Sea was higher than that in Prydz Bay, and the abundance of krill in both sea areas was lower than the same period in history. Antarctic krill is in a normal growth state in the whole surveyed area of Antarctic expeditions in two years, but there are also some stations with poor growth status. It is presumed that this is related to the late return of sea ice or the low chlorophyll concentration. Large krill samples collected using a high-speed harvester account for a large proportion of unipedated krill at the sea ice fringe area stations, whereas adult krill accounts for a large proportion of the sea area where sea ice has subsided over time, reflecting Large krill unripe and adult distribution of different characteristics. Antarctic krill has some differences in population structure in different sea areas, which will affect population supplement.