Figure 5. Long-term trends in populations (xlOOO) 
of canvasback and redhead in the Chesapeake Bay 
during eight periods from 1948 through 1986. 
i I-r- 1 - 1 -r- 1 - 1 
1948-52 53-57 58-62 63-67 68-72 7 3-77 78-82 83-86 
Figure 7. Long-term trends in populations (xlOOO) 
of goldeneye and bufflehead in the Chesapeake Bay 
during eight periods from 1948 through 1986. 
Figure 6. Long-term trends in populations (xlOOO) 
of scaup in the Chesapeake Bay during eight periods 
from 1948 through 1986. 
Figure 8. Long-term trends in population (xlOOO) 
of ruddy duck and scoter in the Chesapeake Bay during 
eight periods from 1948 through 1986. 
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