<?xml version="1.0"?>
<oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:title xmlns:dc="http://purl.org/dc/elements/1.1/">CEFAS Historic surveys - 1902 to 1970</dc:title>
  <dc:type xmlns:dc="http://purl.org/dc/elements/1.1/">dataset</dc:type>
  <dc:identifier xmlns:dc="http://purl.org/dc/elements/1.1/">https://portal.medin.org.uk/portal/start.php?tpc=009_CEFAS053ae9c1-e65c-415a-91c8-cc61a6f611c6</dc:identifier>
  <dc:description xmlns:dc="http://purl.org/dc/elements/1.1/">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).</dc:description>
  <dc:date xmlns:dc="http://purl.org/dc/elements/1.1/">20160321 20111007</dc:date>
</oai_dc:dc>