1030 



REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



[14] 



The plantiug of both whitefish and the lake trout in the waters of the 

 Potomac is an experiment, the success of which can only be judged by 

 the results. Experience has shown that the lake trout will thrive and 

 grow vigorously when confined in ponds, and it is therefore possible 

 that we may acclimate this species in the waters of the Potomac, as it 

 will probably be temperature-locked, and cannot, therefore, very well 

 stray beyond the limits prescribed for it. 



SHAD AND HEREINa FISHERIES OF THE POTOMAC. 



Accurate daily records of the receipts of shad and herring at the Wash- 

 ington fish-wharves have been kept by Mr. Gwynn Harris, inspector 

 of marine products. The daily receipts given by him fairly indicate 

 the fluctuations in the daily catch, and serve as a measure of the fluctu- 

 ations in the run of shad and herring in the river. At the close of the 

 fishing season Mr. Harris, by direction of the Commissioner, obtained 

 a summary for the season of the shad and herring of the Potomac 

 reaching the market through Alexandria, Georgetown, and other points 

 not embraced in his Washington returns. 



The report made by him will be found summarized in form conven- 

 ient for reference in Tables IV, V, and VI. 



Table IV. — Daily record of the receipts of shad at the Washington fish-wharves for the 



season of 1883. 



