Fourth Report of the Bluefin Tuna Working Group. Observation on the size composition of Bluefin Tuna catches from 1967 to 1969

Reference is made to the previous reports of the Bluefin Tuna working group (Statistical News Letters, Nos. 20, 26 and 38).

Following recomendations of the Pelagic Fish (Southern) Committee in 1967; 1968 and 1969, the members of the Bluefin Tuna Working Group have continued to collect data on the development of the Bluefin Tuna fisheries in the North Atlantic and adjacent seas. The work was carried out by correspondence between members and with other tuna scientists in the region.. It has been concentrated on collecting data on the size composition of tuna catches made in 1967 to 1969.