p. 205 - 214 THE COMPOSITION OF THE MACKEREL SHOALS (SCOMBER SCOMBRUS, L.1758) CAUGHT IN THE BRISTOL CHANNEL AND THE ENGLISH CHANNEL DURING OCTOBER-NOVEMBER, 1975 Constantin Maxim Romanian Marine Research Institute Constanta Abstract This paper presents structure on length classes, weight and sex of the mackerel fished in the South-West of Great Britain area in the period of end of the fishing season (Octomber and November). Thhis period coincides with beginning of the cold season and with mackerel shoals movements to the shelter zones situated in the proximity of the bottom.