161 



Distances travelled — 10 7niles and under. — -Two females were recaptured at 5 

 and 6| miles south and west and north and east respectively, 3-8 per cent, of the 

 total fish recaptured, and 5-4 per cent, of the total females. 



10 to 20 miles. — Nine, or 16"9 per cent., were taken at distances of from 10^ to 

 19| miles, viz. 3 males (18'7 per cent.), with an average of 15-2 miles, and 6 

 females (16"2 per cent), with an average of 14'5 miles ; 2 of the males and 1 of 

 the females were found to the south and west, the other male and 3 of the 

 females being taken to the north and west, and 2 females to the south and east. 



Under 20 miles. — Thus, 11 fish, or 20" 7 per cent., were recovered at distances 

 under 20 miles from the place of liberation, 3 males (18'7 per cent.), with an 

 average of 15-2 miles, and H females (21-6 per cent.), with an average of 12-3 

 miles. 



20 to 50 miles. — Twenty-seven of the fish, or 50"9 per cent., were recaptured at 

 distances of from 21 1 to 45 niiles, viz. 8 males (50 per cent.), with a mean of 

 27' 1 miles, and 19 females (SI'S per cent.), with an average of 29'7 miles. Three 

 of the males and 3 of the females were found to the north and west, 2 males and 

 9 females to the north and east, 3 males and 3 females to the south and west, 

 while 1 female was caught directly northwards. 



50 to 100 miles. — Nine, or 16'9 per cent., were recaptured at distances of from 

 52 to 68 miles, the average being 58-9 miles ; they were all females (24'3 per cent.), 

 and 6 were caught to the north and east, 2 to the westwards, within the Firth of 

 Forth, and 1 to the north and west. 



fOver 100 miles. — -Six, or 11'3 per cent., were recovered at distances of from 108 

 to 149 miles ; 5 were males (31"5 per cent.), with an average of 129-3 miles, and 

 1 (2-7 per cent.) was a female, which migrated 141 miles to the Moray Firth. 

 Four of the. males were taken in the Moray Firth, and 1. 20 miles north east of 

 Scarborough, 121 miles south and east. 



Maturity. 



Males. — The condition of the testes was recorded in 13 of the 16 males 

 recaptured. 



Four were "spawning," one, of 36-5-39-8 cm., taken in June 1914, east of the 

 Bell Kock, at a distance of 18 miles to the north and west ; another, of 36-38*3 era., 

 was caught in March 1914, south-east of Aberdeen, at a distance of 31 miles ; the 

 third, which measured 4.5--44'7 cm., was recaptured in January 1914, off Banff, in 

 the Moray Firth, at a distance of 108 miles ; the fourth, of 40-41-2 cm., was also 

 taken in the Moray Firth, in February 1914, off Brora, at a distance of 149 miles. 



Two were described as "ripe"; 1. measuring 35-5-40-3 cm., was taken ia 

 January 1915, to the northward of Longstone Light, at a distance of 25 miles to 

 the south and west ; the other, of 30-40-4 cm., was caught in March 1916, in the 

 Moray Firth, off Clyt-h Ness, at a distance of 135 miles. 



Among those whose reproductive organs were described as "immature," 1, 

 measuring 31-5-37-3 cm., was caught in February 1915, to the south-east of Aber- 

 deen, at a distance of 26 miles ; another, of 31-5-36-5 cm., was taken in April 1914, 

 33 miles to the north and west, near the Bell Rock. 



Femxiles. — The condition of the ovaries in 29 of the 38 recaptured was 

 recorded. 



Two were "spawning"; one, )neasuring 41-5-45-9 cm., was got in March 

 1914, to the westwards, at a distance of 24 miles, near the Bell Rock ; the other, 

 of 43-5-44-6 cm., was taken in March 1914 also, in the Moray Firth, off Ord Head, 

 at a distance of 141 miles. 



One, measuring 42-5-41 cm., caught on 30th August 1913, by an Enghsh 

 trawler, south-east of Aberdeen, at a distance of 33 miles north and east from the 

 station, was landed at Hartlepool, and is described as " mature." 



One, of 40-48-2 cm., was taken in December 1914, south-east of Aberdeen, at 

 a distance of 30 miles north of the station, and was " nearly ripe." 



Eight were described as " spent " ; one, of 46-5-48*5 cm., was taken in January 

 1914, offshore, to the east and south of Aberdeen, at a distance of 37 miles ; an- 

 other, of 48-5-50-9 cm., was recaptured in May 1914, 15| miles to the north and 

 west ; a third, of 39-5-41-5 cm., was recovered also in May 1914, south of Buchanan- 

 6 



