Survey : PLAT/07/1946 (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 04/05/1946 and 05/05/1946 on Platessa

Equipment used during this survey :

- Otter trawl Codend catch

Survey operations were undertaken on 5 stations

9 different species were caught on this survey

本调查由Cefas（原渔业局）发起，作为其历史调查项目的一部分；该调查涵盖了自1902年以来在英国周边海域（尤其是北海）进行的科研调查所收集的站点和生物数据。调查捕获物并未按网格系统进行系统性布局，如当前国际底拖网调查（IBTS）所采用的，而是广泛分布于北海的南部和中部区域。由于数据系列具有长期性质，因此在整个调查过程中，工具和方法并未实现标准化。调查在各个季节均有所进行。两次世界大战期间的资料缺失。在某些时期（例如20世纪初），记录了捕获的所有物种，而在其他时期（例如1920年代至1930年代），仅系统性地记录了关键的商业物种（例如，鳎鱼、比目鱼和鳕鱼）。请注意，某些调查针对特定物种进行（特别是鳎鱼）。1946年4月5日至5月5日，在Platessa进行了调查。此次调查使用的设备包括：

- 集鱼网鳕鱼捕获物

调查操作在5个站点进行。此次调查共捕获9种不同的物种。