Report on Salmon Fisheries. xi 



The inspections made by Mr. Calderwood in 1906 were in the inspections 

 Districts of the Tay, Deveron, Helmsdale, Thurso, Forss, Hope' in 1906 - 

 Inchard, Broom, and Awe. Mr. Calderwood also inspected several 

 oyster and mussel fisheries. 



A continuation of the study of the salmon's scale has been made |°^ n of 

 by Mr. H. W. Johnston, who contributes a paper on the subject in 

 Appendix II. This paper deals with the scale in the early stages 

 of growth. Of the large number of smolts marked in the Tay in 

 1905, several grilse were recaptured in the summer of 1906, and 

 in the spring of this year some of the same number of fish have been 

 recaptured on their first ascent of fresh water from the sea. They 

 are now small spring salmon of 8-1011). weight. Mr. Johnston's 

 paper deals with the scales of these fishes, and is of great value in 

 confirming the view that, in great measure, the life-history of the 

 salmon may be read from its scales. 



Remaining Appendices — viz., VI., VII., and VIII. — give re- 

 spectively the Rateable Values of Scottish Salmon Fisheries, the 

 Annual Close Times at present in force, and a list showing the 

 Chairman and Clerk or Clerks of each District Fishery Board. 



The investigations into the Life-History of the Salmon, carried gjjjjjjj 8 of 

 on by means of marking fish, have been continued during 1906, 

 and thirty-five recaptures secured. The results are dealt with 

 by Mr. Calderwood in Appendix IV. 



An experiment was conducted at the Bay of Nigg Laboratory Ixperiment 

 in order to study the conditions under which salmon pass from sea 

 to fresh water, and more especially to test the length of time dur- 

 ing which the sea lice remained attached to ascending fish. This 

 matter is dealt with in Appendix V. 



We have the honour to be, 



Sir, 



Your most obedient Servants, 



ANGUS SUTHERLAND, Chairman. 



D. CRAWFORD, Deputy- Chairman. 



D'ARCY W. THOMPSON. 



W. R. DUGUID. 



L. MILLOY. 



D. MEARNS. 



H. WATSON. 



WM. C. ROBERTSON, Secretary. 



