184 



Thirty of the marked plaice, 10 males and 20 females, were recovered in March. 

 Twenty-six had migrated north and west, 2 north and east, and 2 south and west. 

 Six of the fishes, 3 females and 3 males, were taken in the Moray Firth, or to the 

 east of it, 2 off Banff, at a distance of 77 miles, and the others at distances of from 

 93 to 107 miles ; 1 of the males and 1 of the females were described as " spawning," 

 the condition of the reproductive organs of the others not being recorded ; a 

 male, which was " ripe," was taken on the north coast, near Strathie Point, at a 

 distance of 150 miles ; another, also " ripe," was caught near Cape Wrath, on 

 the west coast, at a distance of 194 miles ; other females were got at shorter 

 distances to the north-west, from 6 to 43 miles ; most of these fish were either 

 " spent " or " spawning." One male, which was " spawning," was caught north- 

 east of St. Abb's Head, at a distance of 45 miles to the south and west, and another 

 20 miles in the same direction. A female, " spent." was taken 61 miles to the 

 north-east, north-east of Kinnaird Head. 



Thus, in this quarter, 68 fishes, or 34-9 per cent., were recaptured ; 60 (88'2 per 

 cent.) had migrated an average distance of 61 miles in the mean direction N. 26" W., 

 the average rate of movement being 5*3 miles ; 4 (.5"9 per cent.) had moved an 

 average distance of 35 miles in the mean direction S. 39° W., at a mean rate of 

 3*1 miles ; 2 were taken to the north and east, and 2 to the south and east. 



Third Quarter. — ^In April 1911 , 22 of the marked plaice were recovered, 5 males, 

 15 females, and 2 whose sexes were not recorded. Thirteen of the fishes were found 

 to the north and v/est, 4 to the north and east, and 5 to the south and west. A 

 male was caught in the Moray Firth, at a distance of 101 miles, and a female off 

 Banff, at a distance of 77 miles, and 1 of unknown sex at a distance of about 93 

 miles, also in the Moray Firth ; a male was taken east of Noss Head, 104 miles 

 away; a female was caught at 115 miles distant, offshore, to the east of the 

 Orkneys, and 1 off Cape Wrath, on the west coast, at a distance of 196 miles ; 

 most of the remaining fish were found at comparatively short distances to the 

 north and west ; a male, of 27-27-7 cm., was taken at the mouth of the Tay, 59 miles 

 to the south and west. 



Seven were recovered in May, 4 males and 3 females. The position of 2 of 

 the males was unknown ; 1 of the other 2 went to the Moray Firth, and the 

 second 18 miles to the south and west ; 1 of the females was found 20 miles to 

 the south and west, another 34 miles to the north and west, near Buchanness, while 

 the third was recaptured on the north coast, off Whiten Head, at a distance of 

 156 miles ; it was "spent." 



Thirteen were taken in June, 3 males, 9 females, and 1 of unlviiown sex. Seven 

 were found to the north and west, 4 to the south and west, and 2 to the .lorth and 

 east. Two of the males were recaptured in the Moray Firth, at distaJices of 87 

 and about 93 miles, and 2 females, both " spent," were taken to the east of Aus- 

 kerry, Orkneys, at distances of 135 and 137 miles ; a female, "spent," was caught, 

 offsnore, north-east of St. Abb's Head, at a distance of 35 miles to the south and 

 west, and a male, described as " ripe," was taken 32 miles to the north and west, 

 near Buchanness ; the remaining fishes had migrated short distances, of from 5 to 

 15 miles. 



In the third quarter, therefore, 42 of the fish, or 21-5 per cent., were recovered, 

 but the place of recapture of 2 was not ascertained. Of the remaiinng 40 (20'5 

 per cent.), 23 (57-5 per cent.) migrated an average distance of 58 miles in the mean 

 direction N. 15° W., at an average rate of 3 miles per 10 days ; 6 (15 per cent.) 

 migrated an average distance of 79 miles in the mean direction iST. 7° E., at the mean 

 rate of 3*9 miles ; and 11 (27-5 per cent.) moved an average distance of 23 iniles 

 in the mean direction S. 59° W., at a mean rate of 1-2 miles. 



Fourth Quarter. — Eleven of the marked fish were recaptured in July, 3 males 

 and 8 females. Seven were taken to the north and west, 3 to the north and east, 

 and 1 to the south and west. One of the females was taken in the Moray Firth, at 

 a distance of 98 miles ; anothei, east of the Bell Rock, 33 miles away to the soutn 

 and west ; and a third, 25 miles to the north and east, offshore ; all the other fish 

 were found at short distances from the station, from 3 to 13 miles. 



Six were recaptured in August, 4 males and 2 females ; 3 went to the north and 

 west, 2 to the north and east, and 1 to the south and west. Two of the males 

 were taken in the Moray Firth, at distances of about 93 and 94 miles ; a female 



