Xll 



Report on Salon on Fisheries. 



Late River- third paper on Water Temperature in relation to Early 



Temperature. Annual Migration of Salmon will be found as Appendix V. In 

 this paper Mr. Calderwood finally discards the theory that the 

 rivers which have early runs of fish are rivers of a relatively warm 

 temperature. He also deals with the peculiar conditions of the 

 Ness and Garry, Awe and Orchy, in which the upper tributary is 

 in each case the early river, and he gives curves of temperatures 

 taken daily during the winter of 1901-02 to illustrate the conditions 

 which were found to exist. He shows that in each case the upper 

 tributary is markedly colder than the main river flowing from its 

 large loch, and his conclusion is, not that these higher streams 

 have a special attraction for the early running fish, but rather that 

 owing to the high temperature of the lower waters the tendency of 

 the fish is to push their way rapidly upwards till they are checked 

 in their ascent by the cold temperature of the upper waters, and 

 so accumulate in the upper streams in question. 

 r^Tr^^nd^^ In Appendix VI. Mr. Calderwood gives another paper on the 

 Eariy^nd Late Temperature of the Eiver Tay and its Tributaries. In this, the 

 Tributaries, connection between comparatively high temperatures of tributaries 

 and the early entrance of fish is shown, while the converse is also 

 demonstrated by means of curves. In this way it is pointed out 

 that while the thermal conditions of a main river entering the sea 

 do not control the ascent of salmon from the sea to fresh water, 

 the thermal conditions of a large tributary seem to exercise a 

 considerable influence in drawing fish from the main river. 

 Rateable Tables giving Eateable Values of Salmon Fishery Districts, 



cio^e^Times. Annual Close Times at present in force, and a List of the Chairmen 

 Chairmen and and Clcrks of District Fishery Boards, form Appendices VII., VIII. 

 ^'S^lf and IX., respectively. 



Boards. A District Fishery Board for the Eiver Lossie having recently 



been formed, the names of the office-bearers are included for the 

 first time in Appendix IX. 



We have the honour to be, 



Your Lordship's most obedient servants, 



ANGUS SUTHERLAND, Chairman. 



D. CRAWFORD, Deputy-Chairman. 



D'AECY W. THOMPSON. 



J. EITCHIE WELCH. 



W. E. DUGUID. 



L. MILLOY. 



D. MEAENS. 



WM. C. EOBEETSON, Secretary. 



