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Fishery Bulletin 96(2), 1 998 
to estimate mortality, I used data only from months 
over which these processes appeared low. 
Results 
Seasonal changes in YOY 
abundance and size structure 
Young-of-the-year pinfish appeared first as post- 
larvae (9-12 mm) at shallow-water fixed seine sta- 
tions during early November in Choctawhatchee Bay 
and early December in Tampa Bay and Charlotte 
Harbor, one to two months before mean temperatures 
were lowest (Fig. 2). In Choctawhatchee Bay and 
Tampa Bay, pinfish were first collected at deepwater 
trawl stations in the same month or one month after 
their initial appearance at seine stations (Fig. 2). 
In Charlotte Harbor, however, YOY were absent at 
trawl stations until January-March, one to three 
months after their first appearance at seine stations 
(Fig. 2). 
