1957 - 1957 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Survey : EHOLT/03/1957 (part of Historic Arctic Survey Series)

This survey was undertaken by Cefas as part of the Historic Arctic Survey Series; *Gadus morhua* (Atlantic Cod) stocks in the Barents Sea are currently at levels not seen since the 1950s. Causes for the population increase last century, and understanding of whether such large numbers will be maintained in the future, are unclear. To explore this, we digitised and interrogated historical cod catch and diet datasets from the Barents Sea. Data includes temporal and spatial information, cod catch data and length distributions, and hydrographic data. Survey took place between 19/06/1957 and 22/07/1957 on Ernest Holt Equipment used during this survey : - Otter Trawl 78ft Granton with shrimp netting cover Survey operations were undertaken on 51 stations 23 different species were caught on this survey本调查由环境、渔业与水产养殖科学中心（Cefas）作为北极历史调查系列的组成部分实施； 巴伦支海的大西洋鳕（*Gadus morhua*，Atlantic Cod）种群目前处于自1950年代以来从未出现过的种群规模。上世纪该种群数量增长的原因，以及此类庞大种群规模未来能否得以维持的相关认知，目前仍不明确。为探究这一科学问题，我们对巴伦支海的历史鳕鱼捕捞与饵料数据集进行了数字化处理与分析。数据集包含时空信息、鳕鱼捕捞数据、体长分布数据以及水文数据。 本次调查于1957年6月19日至1957年7月22日在“恩斯特·霍尔特（Ernest Holt）”号作业船上开展。 本次调查所使用的设备如下： - 78英尺格兰特诺顿型翼网拖网（Otter Trawl 78ft Granton），配备虾网防护罩 本次调查共完成51个站位的调查作业； 本次调查共捕获23个不同物种。