Trawl Catch and Species Abundance from the 2019 Gulf of Alaska International Year of the Salmon Expedition

Fish species abundance and species-specific length and weight data was collected in the Gulf of Alaska using a midwater trawl net. These data were collected as part of the International Year of the Salmon (IYS) High Seas Expedition conducted in February and March 2019, to further improve the understanding of factors impacting salmon marine winter survival. A total of 64 tows were conducted, and for each tow the total species-specific weight and total (species-specific) catch numbers were recorded. This dataset only contains taxa that were identified to a species level, omitting some Aequorea, Salpa, Gonatidae, Calycopsis, Paralepididae and Ctenophora observations. For the full dataset, it is recommended to contact the data provider. Additionally, for some species individual biometrics were recorded, such as length, wet weight, sex and age class (maturation stage) where possible. The data collected from these trawls aims to improve our understanding of the food web structure.本研究通过中层拖网（midwater trawl net）在阿拉斯加湾采集了鱼类物种丰度以及各物种专属的体长与体重数据。本次数据采集系2019年2-3月开展的国际鲑鱼年（International Year of the Salmon, IYS）公海科考项目的组成部分，旨在深化对影响鲑鱼海洋越冬存活相关因素的认知。本次科考共完成64次拖网作业，每单次拖网均记录了按物种分类的总渔获重量及总渔获尾数。本数据集仅包含鉴定至物种级别的分类单元，剔除了部分艾美水母属（Aequorea）、樽海鞘属（Salpa）、帆蜥科（Gonatidae）、钟形水母属（Calycopsis）、巨尾鱼科（Paralepididae）以及栉水母门（Ctenophora）的观测记录。若需获取完整数据集，建议联系数据提供方。此外，针对部分物种，研究人员还记录了其个体生物学测量数据，包括体长、鲜重、性别以及年龄组（成熟阶段）等可获取的信息。本次拖网采集的数据旨在进一步完善我们对海洋食物网结构的认知。