Seventh Report of the Bluefin Tuna Working Group - observations on the size composition of bluefin tuna catches from 1976 to 1978

Previous reports of the Bluefin Tuna Working Group were published in Statistical News Letters, Nos. 20, 26 and 38, and Cooperative Research Reports, Nos. 23, 40 and 71. Following recommendations of the Pelagic Fish Committee in 1976, 1977 and 1978, the members of the Working Group continued the collection of data on the development of the bluefin tuna fisheries in the North Atlantic and adjacent seas. The work was again carried out by correspondence between members and with other tuna scientists in the region and it has again been concentrated on the collection of data on the size composition of tuna catches taken in 1976-1978.