244 



The number recaptured was 31, or 31 per cent., viz. 16 males (38-1 per cent.) 

 and 15 females (26-8 per cent.). Fifteen of the males were of adult size on recapture, 

 ranging from 33-7 to 4:4-5 cm., and averaging 37'3 cm., as compared with a range of 

 from 33 to 40*5 cm., and a mean of 36 cm. on liberation ; they were at liberty for 

 from 27 to 569 days, the mean being 174 days ; they migrated distances of from 11 

 to 205 miles, the mean being 83*9 miles, and the mean rate 4' 7 miles. Twelve of 

 the females were of adult size, ranging from 38-7 to 51*4 cm., and averaging 43*9 

 cm., as against a range of from 33*5 to 43 cm., and an average of 38-9 cm. on 

 liberation ; they were at liberty for from 59 to 681 days, the average being 346 

 days ; they travelled distances of from 9 to 114 miles, the mean being 50'7 miles, 

 and the mean rate 1*5 miles. 



The Extent and Direction op Migration. 



First Quarter. — A male was recaptured in December, north-east of Buchanness, 

 44 miles to the southwards. In January 1913, 3 males and a female were taken, 

 the female close to the place where the male was captured in December, at a distance 

 of 44 miles to the south, 1 of the males ofEshore to the south and east, at a distance 

 of 90 miles, the second male south-east of Noss Head, Moray Firth, at a distance of 

 76 miles to the south ; the third male is described as having been taken, after 47 

 days, on the Great Fisher Bank, 205 miles to the south-east, the rate of movement 

 being 43-6 miles per 10 days ; this fish was landed at Grimsby, and was probably 

 caught elsewhere than the place mentioned. Two males and 3 females were taken 

 in February, 1 of the males 16 miles to the south and west, and the other 126 miles 

 to the south and west, near Aberdeen ; 1 of the females was taken 11 miles to 

 the north and east, another 27 miles to the south and east, and the third 41 miles 

 to the north and west, 5| miles off Fitful Head, Shetland. 



In this quarter, 10, or 32-25 per cent., were recaptured, 4 to the south and west, 

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



Second Quarter.— 1\\ March 1913, 4 males and 2 females were got, the place of 

 capture of 1 of the males not being ascertained ; the other 3 were taken to the south 

 and west, 1 east of the Orkneys, at a distance of 41 miles, 1 in the Moray Firth near 

 Tarbet Ness, at a distance of 110 miles, and the third betweeji Buchaiiness and 

 Aberdeen, at a distance of 119 miles. One of the females was taken east of the 

 Orkneys, 46 miles to the south and west, and the other offshore, 79 miles to the 

 south and east. A male was caught in April, 44 miles E. \ S. from the Bell Rock, 

 162 miles to the southwards, and in May, a male and female, the female 11 miles 

 and the male 13 miles to the north and west. 



In this quarter, 9, or 29 per cent., were got, positions being known for 8, or 

 25'8 per cent., of which 5 (62'5 per cent.) were recaptured to the south and west, 

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



Third Quarter. — In July, a male was taken 11 miles to the north and west, 

 and in August, 2 females, 1, 17 miles to the north and west, 5 miles from Fair Isle, 

 and the other on Smith Bank, Moray Firth, 89 nules to the south and west. 



Only 3, or 9'7 per cent., therefore, were found in this quarter, 2 to the north 

 and west, and 1 to the south and west. 



Fourth Quarter. — Only 1 was taken in this quarter, a male captured in 

 September, near Noss Head, Moray Firth, 76 miles to the south and west. 



In the 12 months after liberation, 23 or 74*2 per cent., M^ere recovered, positions 

 being knowij for 22, or 70"9 per cent. ; 11 (50 per cent.) were taken to the south 

 and west, 5 each to the north and west and south and east, and 1 to the north 

 and east. 



The remaining captures were all in 1914. In January, a female was taken 

 51 miles to the north and west, on the west of the Shetlands. Li March, a male 

 and a female were found, both in the Moray Firth, one off Noss Head, 76 miles 

 to the south and west, the other near Clyth Ness, 93 miles in the same direction. 

 A female was taken in April, 6 miles from Buchanness, 114 miles to the south 

 and west, another female in May, east of the Orkneys, 35 miles to the south and 

 west, a male and a female in June, the female 9 miles to the north and west, and 

 the male 34 miles to the south and west, east of the Orlmeys. The last fish fiom 



