296 



Third Quarter. — One male and 5 females were recaptured in April, 1 female 

 within the Dornoch Firth, ofp Embo, at a distance of 18 miles ; all the other fish 

 had migrated to the north and east ; the male was taken south-east of Noss Head, 

 at a distance of 31| miles, 2 females farther north and nearer shore, at distances 

 of 37 and 40 miles ; another female on the north coast, at Stormy Bank, a distance 

 of 74 miles ; and the last on the west coast, 14 miles W.S.W. of Cape Wrath, at a 

 distance of 122 miles. A male was taken in May north-west of Kinnaird Head, 33 

 miles to the eastwards, and in June, a female, off the north coast, north-west of 

 Stroma, 76 miles distant. 



Thus, in this quarter, 8 of the marked plaice, or ]2'7 per cent., were recovered 

 6 of them to the north and east. 



Fourth Quarter. — None was taken in July and August, but a male and 3 females 

 were recaptured in September, all of them to the westward, within the Dornoch 

 Firth, at distances of from 13 to 25 miles. 



Within 12 months of liberation, 51 of the marked plaice, or 80"9 percent., were 

 recaptured, the positions being known for 47, or 74 '6 per cent. ; 25 (53 "2 per 

 cent.) were got to the north and west, 16 to the north and east, and 2 each to the 

 south and east, south and west, and directly west. 



Of the remaining fish recaptured, 2 were taken in the remainder of 1912, 8 in 

 1913, and 2 in 1914. 



In October 1912, a female was taken in the Dornoch Firth, 18| miles to the 

 north and west, and in December, a male, 36|^ miles to the north and east, north- 

 west of Rattray Head. 



In January 1913, a male was caught on the north coast, off Dunnet Head, at a 

 distance of 66 miles. In February, a female off Clythness, 17| miles to the north 

 and east ; in March, 2 males 3i and 5i miles distant, east of Tarbet Ness ; and in 

 April a male and 3 females, the male south and east of Clytli Ness, 22| miles to the 

 north and east, 1 of the females 7 miles to the north and east, another at an un- 

 specified place in the Moray Firth, and the third probably in the Dornoch Firth, 

 as it was forwarded from Embo, but the place of capture was not ascertained. 



In February 1914, a male was taken off Lybster, Caithness, 13 miles to the north 

 and east, and in March another male on the west coast, 16 miles W.S.W. of Cape 

 Wrath, at a distance of 124 miles. 



Distances travelled- — 10 miles and under.— Three, or 5 '3 per cent., were found at 

 distances of 10 miles and under, viz. 2 males, with an average of 4*5 miles, to the 

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



10 to 20 miles. — Twenty-one. or 36-8 per cent., were recaptured at distances of 

 from 11 to 19i miles, 10 males (35-7 per cent.), with an average of 14-05 miles, and 

 11 females (37-9 per cent.), with a mean of 16 miles. Six of the males and 8 of the 

 females were fomid to the north and west ; 2 males and 3 females to the north 

 and east ; and 2 males to the south and west. 



Thus, 24 of the marked plaice, or 42-1 per cent., were recaptured at distances 

 under 20 miles, 12 males and 12 females, 



20 to 50 miles. — Tvventy-six, or 45"6 per cent., were recaptured at distances 

 of from 20 to 40i miles, 1.3 males (46-4 per cent.), with an average of 25-1 miles, 

 and 13 females (44-8 per cent.), with an average of 24*4 miles. Five of the males 

 and 7 of the females were found to the north and west ; 5 of the males and 5 of the 

 females to the north and east ; 2 of the males to the south and east ; and 1 male 

 and 1 female directly west. 



50 to 100 miles. — Five, or 8*8 per cent., were caught at distances of from 51 

 to 80 miles, 2 males (7-1 per cent.), with an average of 58-5 miles, and 3 females 

 (10'3 per cent.), with an average of 76-8 miles ; they all moved northwards along the 

 coast. 



Over 100 miles. — Two, or 3"5 per cent., were found at distances over 100 miles, 

 a male and a female, both taken near Cape Wrath, at 124 and 122 miles respectively. 



Maturity. 



Males. — The condition of the testes of 19 of the 30 males recaptured was ascer- 

 tained. Two were "spawning," 1 taken in January 1913, off Dunnet Head, north 

 coast, at a distance of 66 miles, and the other in March 1914, near Cape Wrath, at 



