. Report for ... on the Lancashire Sea-Fisheries Laboratory at the University of Liverpool, and the Sea-Fish Hatchery at Piel. 13 3 i 34 15 11 10 11 38-5 2 8 1 1 5 10 2 2 20 9 6 8 17 39-5 15 5 5 13 21 10 9 10 11 40-5 5 4 3 7 6 2 13 7 9 12 12 41-5 5 6 7 13 6 2 12 10 42-5 i 10 3 7 8 i 20 10 3 7 4 43-5 2 1 f 8 5 14 5 3 11 4 44-5 i 3 1 9 8 i 14 6 5 6 3 45-5 1 3 i 6 8 1 12 7 4 3 1 46-5 ... 1 5 i 1 1 7 2 1 3 3 47-5 3 4 i 2 8 6 11 2 2 2 48-5 ... ! 3 1 5 3 1 49-5 3 i 2 5 i i 3 50-5 1 i 1 2 2 i .51-5 1 1 1 2 1 52-5 i 3 5 1 1 53-5 1 i 3 2 i 54-5 1 55-5 i i i 2 56-5 1 57-5 58-5 i 59-5 60-5 61-5 ... i 62-
. Report for ... on the Lancashire Sea-Fisheries Laboratory at the University of Liverpool, and the Sea-Fish Hatchery at Piel. 13 3 i 34 15 11 10 11 38-5 2 8 1 1 5 10 2 2 20 9 6 8 17 39-5 15 5 5 13 21 10 9 10 11 40-5 5 4 3 7 6 2 13 7 9 12 12 41-5 5 6 7 13 6 2 12 10 42-5 i 10 3 7 8 i 20 10 3 7 4 43-5 2 1 f 8 5 14 5 3 11 4 44-5 i 3 1 9 8 i 14 6 5 6 3 45-5 1 3 i 6 8 1 12 7 4 3 1 46-5 ... 1 5 i 1 1 7 2 1 3 3 47-5 3 4 i 2 8 6 11 2 2 2 48-5 ... ! 3 1 5 3 1 49-5 3 i 2 5 i i 3 50-5 1 i 1 2 2 i .51-5 1 1 1 2 1 52-5 i 3 5 1 1 53-5 1 i 3 2 i 54-5 1 55-5 i i i 2 56-5 1 57-5 58-5 i 59-5 60-5 61-5 ... i 62-5 ... 63-5 ! i ! ... 64-5 ... ... ... 65-5 1 i 133 449 185 70 313 367 77 133 927 469 279 194 558 * 10- 5 to If )-5. 147 These results represent the biggest plaice caught anywherein the Irish Sea area. Here we are concerned only with theLuce Bay figures. The graph shows a fairly well-markeddifi^erence between 1920 and 1921 for this region, the plaicetaken in 1921 being considerably smaller, on the whole, thanthose taken in 1920. Now a somewhat similar decrease insize in North Sea plaice, in 1919 and 1920, was held, by the. Fig. 19. Graphs of the length-frequencies of plaice caught in a 6-inchmesh trawl-net on the northern grounds in February-April, 1921, and inLuce Bay in September, 1920 and 1921. Summational curves from Table 17. English workers, to point to the first results of the renewedintense fishing of the North Sea. That explanation is difficultto extend to the Irish Sea area, for there is comparatively littlefishing in these northern grounds, and Luce Bay is, of course. 148 a preserved reoion, where all forms of trawling are prohibitedby the Scottish Fishery Board. Relative Proportions of the Age-grovps of Plaice in the variousyears. Hitherto it has been rather suggested that plaice arebigger or smaller in one year than in another because they growmore or less rapidly. No doubt there are differences of sucha kind in various years, and, no doubt also, these differencesde
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfisheries, bookyear18
