208 



Distances travelled — 10 miles and under. — Nineteen, or 25 per cent., of the re- 

 captured plaice were taken at distances of from 3 to 10 miles, viz. 7 males (31"8 per 

 cent.), with an average of 6'8 miles, and 12 females (22'2 per cent.), with a mean of 

 6-4 miles. Six of the males and 10 of the females were found to the north and 

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

 south and west. 



10 to 20 miles. — Twenty-five or 329 per cent., were recovered at from 10| to 

 19^ miles. Six (27"3 per cent.) were males, with an average of 13 miles, and 19 

 (35"2 per cent.) were females, with an average of 15 miles. Four of the males and 

 7 of the females were found to the north and west, 1 male and 7 females to the south 

 and west, 2 females to the north and east, 1 male and 1 female to the north, 1 to 

 the south, and 1 to the south and east. 



Thus, 44, or 57-9 per cent., were taken at distances under 20 miles, 13 males 

 (59-1 per cent.), with an average of 9*7 miles, and 31 females (57-4 per cent.), with 

 a mean of 11*8 miles. 



20 to 50 miles. — Twenty, or 26'3 per cent., were found at distances of from 

 20 to 48 miles, 4 males (18"2 per cent.), with an average of 27*2 miles, and 16 

 females (29-6 per cent.), with an average of 32-8 miles. Two of the males and 3 of 

 the females went to the north and west, 2 males to the south and east, 11 females 

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



50 to 100 miles. — Seven, or 9"2 per cent., moved for from 52 to 96 miles, 2 males 

 (9*1 per cent.), with a mean of 80 miles, and 5 females (9-2 per cert.), with ar average 

 of 66 miles. One of the males and 1 female were found to the north and west ; 

 1 of the males and 3 of the females to the south and west, and 1 female to the north 

 and east. A male was caught off Noss Head, in the Moray Firth, and a female off 

 Banff, Moray Firth. One female was recaptured in the Eirth of Forth, near Elie, 

 and 2 to the east and south-east of the Isle of Ma} . 



Over 100 miles. — Five, or 6' 6 per cent., were got at distances of from 113 to 

 198 miles, 3 males (13"6 pei cent.), with an average of 137 miles, and 2 females (3' 7 

 per cent.), one of which moved 198 miles, and was found of? Cape Wrath, on the 

 west coast of Scotland, and the other 108 miles to the Moray Firth Two of the 

 males were found in the Moray Firth, and one off the north coast of Scotland. 



Maturity. 



Males. — The condition of the testes was recorded in 20 of the 22 males recap- 

 tured. One was described as " ripe " ; it was taken in January 1915, only 8 miles 

 to the north-west of the station, and measured 37-43-1 cm. 



One, of 32-5-38*3 cm., was "about three-quarters ripe," and was captured off 

 Stonehaven, 30 miles to the west and north, in December 1914, after 623 days. 



Among those of adult size (33 cm.), described as " immature," recaptured within 

 the limits of the spawning season, 2 were taken in March 1914, 1 measuring 33-5- 

 37"6 cm., 10 miles to the north and west, and the other, of 33-40*4 cm., recovered 

 12 miles to the north and west ; 4 were taken in April, 2 at 5| and 6| miles to the 

 north and west, 1, 11 miles to the north, and the fourth 16 miles to the south and 

 west ; they measured 37-5-37-5 cm., 33-33-2 cm., 35-35-4 cm., and 35-34-6 cm. 



Females. — The condition of the ovaries was ascertained in 48 of the 54 females 

 recaptured. 



None was described as "spawning" or "ripe." One was "nearly ripe," and 

 measured 33-39 cm. ; it was taken off Banff, in the Moray Firth, at a distance of 

 77 miles, in January 1914. One, of 41-5-54-4 cm., taken in December 1913, 22i 

 miles to the north and west, was described as "about three-quarters ripe." Of 

 other 2, described as " about half ripe," 1 was got in August 1913, 15| miles to 

 the south and west, and the other in October 1914, 5 miles to the north and west. 



Ten of the females were said to be " spent." One was taken in March 1913, 

 after 4 days, 6| miles to the north and west ; it measured 44-44-3 cm. Six were 

 taken in April, 4 in 1913, and 2 in 1914 ; of the former, 2 were got 4 and 9 miles 

 to the north and west, and 2,15 miles and 25 miles to the south and west ; of the 2 

 recaptured in April 1914, 1 was found at 11 and the other at 11^ miles to the north 

 and west. Two were taken in June 1913, both to the south-west, at 15 and 52 

 miles distant. The tenth fish was taken in March 1917, after 1457 days, 108 miles 



