Survey : HUXL/02/1902 (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 20/11/1902 and 20/11/1902 on Huxley

Equipment used during this survey :

- Grimsby style otter trawl Codend with mesh 6.8cm

Survey operations were undertaken on 2 stations

13 different species were caught on this survey

本调查由Cefas（前身为渔业管理局）开展，作为其历史调查项目的一部分。自1902年起，Cefas在英国周边海域，尤其是北海地区，进行了多项研究调查，收集了站点和生物数据。调查捕获的样本并非按网格系统有系统地排列，如当前的国际底拖网调查（IBTS）所做，而是在北海的南部和中部区域广泛分布。由于该系列数据的长期性，装备和协议并未标准化。调查在每年的每个季节都进行。两次世界大战期间的数据缺失。在某些时期（例如20世纪初），所有捕获的物种都被记录，而在其他时期（例如1920年代至1930年代），只有关键的商业物种（例如鲽鱼、鳎鱼和鳕鱼）被系统地记录。值得注意的是，某些调查专注于特定的物种（尤其是鲽鱼）。调查于1902年11月20日至1902年11月20日在Huxley号上进行。本次调查使用的设备包括：- 格里姆斯比风格的獭式拖网，网目尺寸为6.8厘米。调查在2个站点进行，共捕获了13种不同的物种。