241 



The Extent and Direction of Migration. 



First Quarter. — None was taken in June or July, but in August a male was 

 recaptured and landed at Dundee by a local trawler with an intimation that the 

 fish was taken " 16 miles north-west of the Bell Rock," a position which is well 

 on land. On the assumption that it was' 16 miles south-east of the Bell Rock, 

 the distance would be 190 miles to the south and west, and the mean rate of move- 

 ment 34 '5 miles per 10 days ; on the assumption that it was 16 miles to the north- 

 east of the Bell Rock, the distance would be 163 miles, and the mean rate of move- 

 ment 29-6 miles. This fish measured 32-31 '8 cm., and was "immature." 



Four females were taken in September, all to the south and west ; 1, 7 miles 

 south-east from Start Light, Orkneys, at a distance of 35 miles ; another, north 

 and east of Kiunaird Head, at a distance of 52 miles, and 1 a little to the north 

 east of Kinnaird Head, at a distance of 89 miles, and the fourth to the south-east 

 of Buchanness, at a distance of 120 miles. 



In this quarter, 5 fish, or 10-9 per cent., were recaptured, all to the south and 

 west. 



Second Quarter. — One male and 6 females were recaptured in October, the male 

 24 miles to the north and west ; a female 14 miles in the same direction ; another 

 female was taken 56 miles to the south and east, in the offshore waters, and the 

 other four to the south and west ; 1 at a distance of 31 miles ; another at 61 miles, 

 the third at 88 miles, near Kinnaird Head, and the fourth 6 or 7 miles south- 

 south-east from Buchanness, at a distance of 180 miles. 



In November, 3 females were recaptured ; 1 in the Moray Firth, the position 

 unspecified, the other 2 at 8 and 11 miles to the north and west. A female was 

 taken in December, 59 miles to the south and west, north-east of Duncansby Head. 



In this quarter, 11 fish, or 23*9 per cent., were recaptured, the position being 

 known for 10 (21 "7 per cent.). Five were found to the south and west ; 4 to the 

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



Third Quarter. — None was recaptured in January, but 1 male and 6 females 

 were taken in February. Place of capture of the male was not ascertained, the 

 fish being found on the market at Billingsgate. Five of the females were found 

 to the south and west ; 2 of them at 37 and 39 miles, to the east of the Orkneys, 

 1 at 28 miles and 2 in the Moray Firth, south-east of Berriedale Head, at 95 and 

 99 miles. The remaining female is described as having been captured 95 miles 

 to the east and south, in the offshore waters. 



In March, 2 males and a female were taken all to the south and west ; the 

 female and 1 of the males to the east of the Orkneys at 42 and 45 miles ; the other 

 male in the Moray Firth, south east of Clyth Ness at 90 miles distant. 



In this quarter, 10 tisli, or 21*7 per cent., were captured, the place of capture 

 being recorded for 9 (19-6 per cent.), of which 8 (88'9 per cent.) were found to 

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



Fourth Quarter. — In April, 2 females were recaptured, both to the north and 

 west, 1 near Start Poiiit, Orkneys, at 39 miles, the other 7 miles west by north 

 from Foula, Shetlands, at 63 miles distant. 



In May, 2 males and 2 females were recaptured, the females to the north and 

 west, at distances of 10 and 44 miles, the latter near Start Point, Orkneys ; the 

 males were foimd to the south and west, 1 east of tne Orkneys, at a distance of 39 

 miles, the other near Cullen, on the south shore of the Morav Firtli, at a distance of 

 109 miles. 



In June. 1 male and 2 females were recaptured, the male 40 miles north and 

 west, near Auskerry, Orkneys ; the females, south and west, 1 east of the Orkneys, 

 at a distance of 44 miles, the other south-east of Noss Head, in the Moray Firth, 

 at a distance of 78 miles. 



In this quarter, nine of the marked plaice, or 19-6 per cent., were recaptured, 

 5 to the north and west, and 4 to the south and west. 



In the 12 months following liberation, 35 of the marked plaice, or 76-1 per cent., 

 were taken, the position being recorded for 33 (71-7 per cent.). Twenty-two 

 (66-6) per cent, to the south and west, 9 to the north and west, and 2 to the south 

 and east. 



Of the remaining fishes, 5 were recaptured in the remainder of 1913, aiid 6 in 



