North Sea Plankton Survey - RV Cirolana 01/81

Ichthyoplankton samples were collected over three separate periods during a
survey in an area 15 miles south south west of Brown Ridge in the central
North Sea. As part of a number of survey objectives the distribution of early
stage plaice eggs was investigated. This data consists of the numbers of
plaice eggs and the larvae of herring and sprat identified from the main net
samples. Positional data and volumes filtered are included.

在位于北海中部布朗岭西南方向15英里处的调查区域内，于三个不同的时间段内收集了鱼类浮游幼体样本。作为调查目标之一，对早期阶段鳎鱼卵的分布进行了研究。该数据集包含了从主要网样中识别出的鳎鱼卵、鲱鱼和鲭鱼幼虫的数量，以及位置数据和过滤体积。