Survey : GEBL/85/1924 (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 05/07/1924 and 08/07/1924 on GBligh

Equipment used during this survey :

- peterson young fish trawl

Survey operations were undertaken on 21 stations

0 different species were caught on this survey

本调查由Cefas（原渔业局）组织实施，作为CEFAS历史调查的一部分；在自1902年以来对英国周边海域（尤其是北海）进行的研究调查中收集了站点和生物数据。调查的捕捞作业并非按网格系统有序排列，如现行国际底拖网调查（IBTS）所示，而是广泛分布于北海南部和中部地区。由于该系列数据长期性的特点，工具和方法并未在整个过程中实现标准化。调查在每个季节均有所进行。两次世界大战期间的数据缺失。在某些时期（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）。1924年7月5日至8月8日，在GBligh号上进行了调查。此次调查使用的设备包括：- Peterson Young鱼拖网。调查操作在21个站点进行。此次调查捕获了0种不同的物种。