300 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



_ l I I I I I I M I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I l _ 



UJ 



920 1930 



YEAR 



1940 



Fkuire 9. — Trends in surface water temperatures at Boothbay Harbor, Maine, for each month of the year, 



1905-49. (Curves are 5-year moving averages.) 



