To collect biological data on the gadoid populations (cod, haddock and whiting) at two geographcally contrasting sites: Inshore - North Minch; Offshore - Butt of Lewis.
This charter is one of a series of surveys in both the North Sea and off the west coast of Scotland. These surveys are to be performed bi-monthly and the collected data will allow:
a) Comparison of inshore and offshore gadoid populations, with respect to size structure, growth, age composition and condition indices;
b) Description of temporal variation in these condition indices; and
c) Development of unbiased bi-monthly growth curves for the target gadoid species.
This project will be conducted as a preliminary exercise to assess the feasibility of using commercial vessels to supplement the collection of biological data on key commercial stocks.
Mike Breen (Fisheries Research Services Aberdeen Marine Laboratory)
Gadoid Survey - West Coast No 1
Inner Seas off the West Coast of Scotland North East Atlantic Ocean (limit 40W)
North Minch (57E50'N 05E55'W) and Butt of Lewis (58E50'N 06E20'W)
Biology and fisheries
Quantity: number of hauls = 8 Description: Trawls. Cod, haddock and whiting measured for length, weight, age, sex, maturity, somatic weight, liver weight and ovarian tissue samples.