Aurora Australis Voyage 7 (KROCK) 1992-93 Zooplankton Data

This dataset contains results from the Aurora Australis Voyage 7 (KROCK) 1992-93, related to mesoscale distribution of krill and zooplankton communities in Prydz Bay in relation to physical and biological oceanographic parameters. There were five objectives of this project: to define the distribution patterns and abundance of krill in the krill dominated continental shelf area of the Prydz Bay region; to define the krill population structure within this area and the distribution pattern of developmental stages, especially spawning females; to define the distribution patterns and composition of the other two principal communities, neritic and oceanic, which border the krill dominated community; to specifically determine the zooplankton composition within the main feeding area of Adelie Penguins from Bechervaise Island monitoring site, Mawson; to record and analyse various physical and biological processes, eg. salinity, temperature, ice and phytoplankton, to determine how these parameters affect the observed distribution patterns. Surveys of krill and other zooplankton were taken in Prydz Bay, Antarctica between January and February 1993. At each station, rectangular midwater trawls and CTDs/bottle casts were made. During the program, echosounders and echointegrators were operating to provide krill abundance and distribution data, in addition to that from the RMT trawls. Initial analysis has shown that Euphausia crystallorophias dominates the neritic community on the shelf, while Euphausia superba was found not to occur in high abundance in the central Prydz Bay area between 70 and 78 degrees East. This dataset is a subset of the full cruise.本数据集涵盖1992-1993年南极光号（Aurora Australis）第7航次（KROCK）的调查成果，聚焦南极洲普里兹湾（Prydz Bay）内磷虾与浮游动物群落的中尺度分布特征，及其与物理、生物海洋学参数的关联关系。本项目共设定五项研究目标：其一，明确普里兹湾海域以磷虾为优势类群的大陆架区域内磷虾的分布格局与丰度水平；其二，阐明该区域内磷虾种群结构，以及各发育阶段（尤其是产卵雌体）的分布模式；其三，界定毗邻磷虾优势群落的另外两类主要群落——浅海群落与远洋群落的分布格局与物种组成；其四，针对莫森站（Mawson）贝彻韦斯岛（Bechervaise Island）监测点的阿德利企鹅（Adelie Penguins）主要觅食区域，精准测定其浮游动物群落组成；其五，记录并分析各类物理与生物过程（如盐度、温度、海冰与浮游植物），以厘清上述参数如何影响观测到的生物分布格局。1993年1月至2月期间，研究团队在普里兹湾开展了磷虾与其他浮游动物的野外调查。每个采样站位均实施了矩形中层拖网采样与CTD（温盐深仪）/采水器投放作业。本航次期间，除RMT拖网采样获取的数据外，还通过回声测深仪与回声积分系统同步采集了磷虾丰度与分布相关数据。初步分析结果显示：大陆架浅海群落的优势类群为晶磷虾（Euphausia crystallorophias）；而在东经70°至78°之间的普里兹湾中部海域，未检测到南极大磷虾（Euphausia superba）存在高丰度分布。本数据集为完整航次调查数据的子集。