Extraction of fish - Sprat extraction (landings) HOLAS 3

The dataset contains the extraction of one of the target species, sprat, for the period 2016-2020. The extraction of sprat data set is based on "Fish extraction - commercial fisheries HOLAS 3". Further information about how this dataset was collected and extracted can be found at: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/a0104cfd-d237-459b-84f8-8e9e21d2df9b Reported per ICES Rectangles, Russian data extracted from ICES annual reports, reported per ICES sub-divisions. Values are redistributed with fishing effort data c-squares (all gears) 2016-2021. Effort values missing from Russia and sub-basin average values given. Extraction of fish species (landings) per ICES c-squares, average of 2016-2020. Landings calculated per km2. Tons/km2 calculated for each species. Log-transformed and normalized.本数据集提取了2016-2020年期间的目标物种之一——西鲱（sprat）的数据。该西鲱数据集的提取工作基于《鱼类提取——商业渔业HOLAS 3》。有关本数据集的采集与提取方式的更多详细信息，请访问：https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/a0104cfd-d237-459b-84f8-8e9e21d2df9b 数据按ICES矩形进行统计，其中俄罗斯相关数据取自ICES年度报告，并按ICES亚区进行统计。随后结合2016-2021年所有作业渔具的捕捞努力量c-squares数据对数值进行了重分配。俄罗斯的捕捞努力量数据存在缺失，故采用子流域平均值予以补充。本数据集提取了各鱼类物种上岸量的ICES c-squares统计数据，以2016-2020年的平均值计。上岸量按每平方公里核算，各物种的单位为吨/平方公里，并经过对数转换与归一化处理。