Survey : HUXL/71/1906 (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 04/04/1906 and 11/04/1906 on Huxley

Equipment used during this survey :

- Grimsby style otter trawl Codend with mesh 6.8cm
- Lowestoft smack beam trawl 43ft 13.1m

Survey operations were undertaken on 23 stations

45 different species were caught on this survey

本调查由英国海洋科学研究所（Cefas）开展，作为其历史调查项目的一部分；该研究所（原渔业管理局）自1902年起在英国周边海域（尤其是北海）进行了研究调查，收集了站点和生物数据。调查捕获物并非如当前国际底拖网调查（IBTS）那样以网格形式系统性排列，而是广泛分布（尤其是北海南部和中部区域）。由于系列数据的长期性，工具和方法并未在整个调查过程中实现标准化。调查在各个季节均有所进行。两次世界大战期间的数据缺失。在某些时期（如20世纪初），捕获的所有物种均被记录，而在其他时期（如1920年代至1930年代），仅系统地记录了关键商业物种（例如鳎鱼、鳎鱼和鳕鱼）。值得注意的是，一些调查专门针对特定物种（尤其是鳎鱼）。1906年4月4日至11月11日，在Huxley号上进行的调查中，使用了以下设备：

- 格里姆斯比式海狸拖网鳕鱼网，网眼尺寸为6.8厘米
- 诺里奇式刺网拖网，长度为43英尺13.1米

调查在23个站点进行，共捕获了45种不同的物种。