Ocean research and the great fisheries . r and November at2J-3| inches. These fish were beheved to have been hatched inthe previous year. Williamson in 1893 drew up a complete tableof sizes of lemon soles from (9-7 millimetres) 0-3 inch to 10 incheslong, and concluded that in the North Sea the fish took severalyears to reach the latter size. ^ i. e. in length. Plaice turn into flat fish when they are about 45 days old and about {— ) 15 mm. long [see p. 36]. Lemon soles float longer than plaice at the surface, i. e. they have what is calleda longer pelagic existence . k2 148 LEMON SOLES Mr. Sto
Ocean research and the great fisheries . r and November at2J-3| inches. These fish were beheved to have been hatched inthe previous year. Williamson in 1893 drew up a complete tableof sizes of lemon soles from (9-7 millimetres) 0-3 inch to 10 incheslong, and concluded that in the North Sea the fish took severalyears to reach the latter size. ^ i. e. in length. Plaice turn into flat fish when they are about 45 days old and about {— ) 15 mm. long [see p. 36]. Lemon soles float longer than plaice at the surface, i. e. they have what is calleda longer pelagic existence . k2 148 LEMON SOLES Mr. Storroiv on Lemon Soles Mr. Storrow, of Cnllercoats, in 1916 wrote some valuablenotes on the growth of lemon soles. He found, from examiningeight fish., that it was not easy to age them from the marks onthe ear-stones, which were not nearly so clear as those on theear-stones of dabs or plaice. His photographs of the scales oftwo of these fish, however, show that they indicate the agedistinctly enough. The photograph does not very clearly. f f T f -f -f Fig 17.—Lemon soles (After Storrow.) indicate the end of the eight-years growth in the case of theolder fish, but it is clear enough under the microscope .^ The growth is rapid at the beginning of summer, and slowsdown until the concentric rings come very close together. It wasfound that practically all the scales (out of 140 each examinedfrom two lemon soles) gave similar readings as to the age of thespecimen from which they were taken, though in a few scalesthe ridges were absent round the central focus. This seems toestablish the utility of scale reading as apphed to the species. 1 Dove Marine Laboratory Report, N. S., V, p. 58. PLATE XIV
Size: 1220px × 2047px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublisheroxfor, bookyear1921
