138 



the nortli and west, and 2 males in October, one 2 miles to tlie south-west, after 

 574 days, and the other in the Moray Firth, 139 miles away, after 562 days. 



Four fish were recaptured in 1915. Two females, taken in May, had both 

 migrated to the north and east ; one was caught, 112 miles distant, in the Moray 

 Firth, after 768 days ; both of these fish are described as " spent." In September, 

 a male and a female were recovered, both to the north and east, off the coast of 

 Aberdeen, the male at a distance of 48, and the female at a distance of 28 miles, 

 after periods, the male of 912 days, and the female of 911 days. 



A summary of the mean distance and direction in each quadrant is sho\\ni in 

 the following table : — 



Distances travelled.Seventeen fish, or 28 per cent, of the total number re- 

 captured, were taken at distances not exceeding 10 miles, viz. 6 males (25 per 

 cent.), which had migrated an average distance of 5-2 miles, and 11 females 

 (29-7 per cent.), which had moved an average distance of 7-4 miles. Three of the 

 males were taken to the south and west, at distances of 2 and 5 miles ; one was 



