List of frequency studies for Trisopterus esmarkii
Locality Year
from - to
Sex Gear Frequency type
Hebrides, UK Scotland 1968 - 1968 unsexed/mixed  trawls  % of sample 
North Sea, UK Scotland 1964 - 1969 unsexed/mixed  trawls  % of sample 
North Sea, UK Scotland 1967 - 1969 unsexed/mixed  trawls  % of sample 
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