Survey : HUXL/03/1902 (part of CEFAS Historic surveys)

This survey was undertaken by Cefas as part of the CEFAS Historic surveys;

Station and biological data collected during research surveys carried out by
Cefas (formerly Directorate of Fisheries) in seas around the UK, mostly in the
North Sea, since 1902. The survey hauls are not laid out systematically as a
grid, as in current International Bottom Trawl Surveys (IBTS) and are widely
distributed over (especially) southern and central North Sea areas. Gears and
protocols were not standardised throughout, due to the long term nature of the
series. Surveys took place in each season. Data are lacking for the periods of
both World Wars. In some periods (e.g. the early 1900s), all species caught
were recorded, whereas in other periods (e.g. 1920s-30s), only the key
commercial species (e.g., Plaice, Sole and Cod) were recorded systematically.
Note that some surveys targeted particular species (notably Plaice).

Survey took place between 08/12/1902 and 09/12/1902 on Huxley

Equipment used during this survey :

- Grimsby style otter trawl Codend with mesh 6.8cm

Survey operations were undertaken on 9 stations

16 different species were caught on this survey

本调研由英国海洋渔业科学研究所（Cefas，原名渔业局）发起，作为Cefas历史调查项目的一部分。自1902年以来，Cefas在环绕英国的海洋（尤其是北海区域）开展了一系列研究调查，积累了丰富的站点和生物数据。然而，与当前国际底拖网调查（IBTS）的网格化布局不同，本调研的采集作业并未遵循系统性的网格布局，而是广泛分布在北海的南部和中部地区。由于该数据系列的长期性质，工具和方法并未实现标准化。调研活动在每年的各个季节均有所开展。两次世界大战期间的数据缺失。在某些时期（例如20世纪初），所有捕获的物种均被记录，而在其他时期（例如1920年代至1930年代），仅有关键的商业物种（例如比目鱼、鳎鱼和鲭鱼）被系统地记录。值得注意的是，某些调研活动专门针对特定物种（特别是比目鱼）。1902年12月8日至12月9日，在Huxley号上进行的调研中，使用了以下设备：

- 格里姆斯比风格的獭钩式拖网，网目尺寸为6.8厘米

此次调研在9个站点进行，共捕获16种不同的物种。