30 



Date 

 Liberated. 



No. of 

 Pish. 



Days 



Free. 



Date 

 Captured. 



Place 

 Recaptured, 



Sizes. 



Lib. Recap. 



EXPERIMENT IX.— continued. 



Females. 



July 1913. 



Sept. 1913. 

 Do. 



Jan. 1914. 



Do. 

 Do. 



Feb. 1914. 



Mar. 1914. 



Do. 



Apr. 1914. 



of 



10' E.S.E. 



Bass Rock. 

 28'E./N.ofMay. 

 30' S.S.E. of 



Aberdeen. 

 20' E.S.E. nf 



Bass Rock. 

 l^'offWhitehills. 

 90' N.E./N. of 



Longstone 



Light, 

 i ' o ff Pitten weem . 

 6' E. of Blyth. 

 17' S.E. \ E. of 



Berriedale 



Head. 

 7' S.E./E. of 



Buchanness. 



26th Mar. 1913. 



S. 1296 

 A. 5037 



379 

 474 



EXPERIMENT X, 



Males. 

 Apr. 1914 



July 1914. 



25' N. of Kin- 



naird. 

 40' S. E. of Aber- 



deen. 



Females. 



Mar. 1914. 

 Apr. 1914. 



May 1914. 



Do. 



July 1914. 



Aug. 1914. 



Dec. 1914. 



1 ' off Pitcenweem. 



7'S.S.E.ofBuch- 

 aness. 



7' S.E. of Aber- 

 deen. 



8' S.E. of Aus- 

 kerry. 



20' E. of Buch- 

 anness. 



8' S.E. of Buch- 

 anness. 



7'N.E./E. -|E.of 

 Aberdeen. 



33- 

 35- 



40- 

 39-5 



7- 



4-5 



It will be seen that the amount of growth, and the calculated rat« of growth 

 per 10 days, varied very considerably in different cases. In considering the measure- 

 ments, various things have to be taken into account. Thus, the smaller fish 

 (under adult size) grow more rapidly than the older and larger fish of the same 

 sex ; secondly, growth is well known to take place chiefly in the summer months, 

 and may be almost or completely arrested in winter, and some of the fish in the 

 table had the growth of two summers ; th rdly, as the table shows, many of the 

 fish were got at a great distance from the place of Hberation, and it is known that 

 in certain localities, as, for example, the Moray Firth, growth is more rapid than it 

 is in other locaUties, as in the Firth of Forth and neighbourhood. It does not 

 appear, therefore, to be necessary to discuss these measurements in detail. 



Similar tables have been made for the fish which were at liberty for longer 

 periods than that referred to above. Thus, 30, viz. 12 males and 18 females, were 

 recaptured after having been between 2 and 3 years at liberty. 



