FISHERY BULLETIN: VOL. 74, NO. 1 



Table 4. — Comparisons of mean catch per tow of penaeid shrimps between 

 subareas (Tukey's w-procedure with 125 df) of the St. Andrew Bay system, Fla., 

 from September 1972 through August 1973. 



Species 



Subarea, mean catch in parentheses and significance lines' 



Penaeus duorarum 



Trachypenaeus similis 



Sicyonia brevirostris 



'Any two means not underscored by the same line are significantly different at the 5% level. 



2 

 o 



< 



9 



> 

 a 

 z 



Z 



Z 

 < 



Figure 3. — Mean catch per tow of seven 

 penaeid shrimp species in the upper and 

 lower areas of the St. Andrew Bay system, 

 Fla., 1972-73. 



6 IS 3 17 30 14 27 13 26 8 23 5 20 5 19 



SEP OCT NOV DEC JAN FEB MAR 



1972 



3 18 30 14 29 13 25 9 23 7 20 



APR MAY JUN JUL AUG 



1973 



162 



