26 



observed, and the probable explanation is that the handling and marking of the 

 fish interferes with feeding and gro\\^h for some time. 



1. Fish Kecaptured after One Year or More. 



The results have been tabulated for some of the experiments. In the ten ex- 

 periments made between Elie and Fidra (p. 36), the number of marked plaice 

 recaptured after an interval of from one to two years of freedom was 127, viz. 

 58 males and 69 females. The particulars are shown in the following table : — 



Date 

 Liberated. 



No. of 

 Fish. 



Days 

 Free. 



Date 

 Caught. 



Place 

 Recaptured. 



EXPERIMENT I. 



Males. 



25th Nov. 1910. 



Feb. 1912. 



Do. 



Mar. 1912. 



Do. 

 May 1912. 

 Sept. 1912. 

 Nov. 1912. 



4' N. of Tarbet 

 Ness 



18' E.S.E. of 

 Aberdeen. 



7' S.S.E. of 

 Buchanness. 



2' off Banff. 



Storm V Bank. 



28' E. of May. 



30' E. of Aber- 

 deen. 



Females 

 Dec. 1911, 

 Mar. 1912 



Do. 

 Do. 



July 1912. 



Do. 



Sept. 1912. 



7' S.E. of 



Buchanness. 

 16' E.N.E. of 



Aberdeen. 

 10' E.N.E. of May. 

 18' E.S.E. of 



Aberdeen. 

 14' E. ^ S. of 



Auskerry. 

 30' E./S. 'i S. of 



Aberdeen. 

 30' S.E./E. i S. 



of Buchanness 



EXPERIMENT II. 



Males. 



8th Feb. 1911. 



Feb. 1912. 

 Do. 



Mar. 1912. 



Do. 



Do. 



Do. 

 Do. 



Apr. 1912. 



Aug. 1912. 



Dec. 1912. 



1' off Largo. 



26' S.E./E. of 



Aberdeen. 

 4' off Pennan 



Head. 

 7' N.N.E. i E. 



of Troup Head. 

 Y off Pitten- 



weem. 

 6' off Brora. 

 4' S.S.E. of Col- 



lieston. 

 63' E./S. of 



Girdleness. 

 28' E.S.E. of 



Bass Rock. 

 4' E.S.E. of Cru- 



den Scaurs. 



