2U 



known for 22, or 40 per cent., of which 12 (54 "5 per cent.) were taken at the mean 

 distance of 17'8 mi 1 es in the mean direction N. 26° E. ; 8 (36 '4 per cent.) at the mean 

 distance of 22 miles, in the mean direction N. 33° W. The remaining 2 were re- 

 captured to the south and east. An examination of the migration chart shows that 

 the great majority of the fish were recaptured northward of the place of hberation, 

 most of them to the south-east of Noss Head. 



Second Quarter. — In January 1913, a male and a female were recovered, the 

 female 15 J miles to the north and west ; the male was got on the north coast, off 

 Dunnet Head, at a distance of 60^ miles to the north and west. 



Four males and 3 females were taken in February, all but 1 female to the north 

 and west. Three were recaptured in the Dornoch Firth, 2 males and a female, at 

 distances of 42 and 44 miles to the westwards ; a male was got a Uttle north of the 

 Dornoch Firth, at a distance of 32 miles, and another ofi Clythness, at 24 miles 

 distant ; a female was recaptured off Noss Head, 24^ miles distant to the north- 

 ward ; the remaining female was taken to the east and south, at a distance of 

 26 miles. 



In March, 2 males and 2 females were recaptured, the 2 males in the Dornoch 

 Firth, at distances of 40 and 43| miles to the westward ; the 2 females were taken 

 off Clyth Ness, 16 miles and 16| miles north and west. 



In this quarter, 13 of the marked plaice, or 23-6 per cent., were recovered, 12 

 (92 "3 per cent.) at an average distance of 34 miles in the mean direction N. 55° W., 

 and 1 to the south and east. The Unes on the migration chart show a great 

 difference from that for the first quarter, spreading, as they do, shorewards, from 

 Tarbet Ness to Duncansby Head. 



Third Quarter. — In April, 4 males and 2 females were recaptured, 1 of the males 

 and 1 of the females being taken by foreign trawlers in the " Moray Firth " ; the 

 remaining female was got 11| miles to the north and east, 1 of the males 18 miles to 

 the north and west, off Clythness, another 14 miles to the north and east, and the 

 last in Burghead Bay, 40 miles to the south and west. 



In May, a female was recovered in the Dornoch Firth, at a distance of 43 miles 

 to the westward. 



In June, a male and a female were found, the former 23 miles to the north and 

 west, near Noss Head, the latter 16 miles in the same direction, off Clythness. 



Thus, in this quarter, 9 fish were recaptured, or 16'4 per cent., the position 

 being known for 7 (12'7 per cent.) ; 4 (57- 1 per cent.) were found to the north and 

 west, 2 to the north and east, and 1 to the south and west. 



Fourth Quarter. — In July, a female was taken 14 miles to the north and west, 

 and in August, another female almost in the same position. 



Only 2, or 3"6 per cent., were taken in the fourth quarter. 



In the 12 months following liberation, 50 of the fish, or 90*9 per cent., were 

 recovered, the position being known for 44 (80 per cent.), and of those 26 (59-1 per 

 cent.) migrated to the north and west, 14 (31*8 per cent) to the north and east, 3 to 

 the south and east, and 1 to the south and west. 



Of the remaining fishes recaptured, a female was caught in December 1913, 21 

 miles to the north and west, and in February 1914, 3 males and a female were 

 taken ; the female was recaptured off Tarbet Ness, 31 miles to the south and MT&t, 



I of the males north-east of Tarbet Ness, 38 miles to the north and west, and 

 the other 2 males at 23 and 30 miles to the north and west. 



Distances travelled — 10 miles and under. — Two fish, or 4'1 per cent., went distances 

 of 7 miles to the north and west, a female and a male. 



10 to 20 miles. — Twenty fish, or 40'8 per cent., were found at distances of from 



II to 18 miles, 6 males (26-1 per cent.), with an average of 14-7 miles, and 14 females 

 (53'8 per cent.), with an average of 14'5 miles. Five of the males and 5 of the 

 females went to the north and east, 1 of the males and 9 of the females to the north 

 and west. 



Thus, 22 fish, or 44-9 per cent., were got at distances under 20 miles, 7 males 

 (304 per cent.), with an average of 13"6 miles, and 15 females (57*7 per cent.) with an 

 average of 14 miles. 



20 to 50 miles. — Twenty-four fish, or 48'9 per cent., migrated from 20 to 44 miles, 

 14 males (60*9 per cent) with an average of 32-4 miles, and 10 females (38-5 per 

 cent.), with an average of 30"5 miles. Eleven of the males and 5 of the females went 



