Survey : EHOLT/04/1955 (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 25/05/1955 and 18/06/1955 on Ernest Holt

Equipment used during this survey :

- Otter Trawl 78ft Granton Arctic bobbins wooden otter boards
- Otter Trawl 78ft Granton with shrimp netting cover

Survey operations were undertaken on 37 stations

18 different species were caught on this survey

本项调查由Cefas（英国海洋科学中心）发起，作为历史北极考察系列的一部分。大西洋鳕鱼（Gadus morhua）在巴伦支海的种群水平目前处于自20世纪50年代以来未曾见过的低点。关于上个世纪种群增加的原因，以及是否能够维持如此庞大的种群在未来，目前尚无明确的理解。为了探究这一问题，我们对巴伦支海的历史鳕鱼捕捞和食性数据集进行了数字化处理和分析。数据包括时间与空间信息、鳕鱼捕捞数据及长度分布，以及水文数据。调查于1955年5月25日至6月18日在Ernest Holt号上进行。此次调查所使用的设备包括：- 78英尺格兰顿北极型海獭拖网，配备木质海獭板- 配有虾网覆盖的78英尺格兰顿海獭拖网调查作业在37个站点进行。此次调查共捕获了18种不同的物种。