.200 



150 



.100 

 c 



o 



X 



F. 050 



:; .000 



I .200 



o 



o: .150 



UJ 



m 



S 

 z> 

 z 



.100 





.050 



.000 



-1 1 1 1 1 1 1 r 



SOUTH PASS 



i 



06 ' 07 ' 08 ' 09 10 I 





J 





2 ' 13 ' 14 ' 15 ^ 16 17 ■ 18 



— \ 1 1 1 1 1 — 



PENSACOLA, DESTIN, PANAMA CITY 



y 



0=BLUE MARLIN 

 □ = WHITE MARLIN 

 |g=SAILFISH 



^ 



a. 



06 07 ' 08 ' 09 ' 10 II 12 13 



TIME OF DAY 



14 ' 15 ' 16 ^ 17 ' IB 



5.0 



6.7 



10.0 



20.0 



111 

 m 



5.0 



o: 



6.7 O 



10.0 



20.0 



Figure 4.— Relative abundance of billfishes by time of day for South Pass and northwest Florida, 1971 . 



RELATIVE ABUNDANCE BY 

 TEN-MINUTE SQUARES 



To determine the relative abundance of billfishes 

 by ten-minute squares, the data were analyzed by 

 calculating the number of fish raised per hour of 

 fishing within each square during biweekly periods. 

 For South Pass, the biweekly periods were begun 



Table 8. — Sex ratios of billfishes caught off South Pass, 

 1967-71, and off northwest Florida, 1971 {no. of males 

 versus no. of females in parentheses). 



on 26 May and were ended 28 September. Effort 

 before and after this period was very low and 

 sporadic. For northwest Florida, the biweekly 

 periods were begun on 26 May and were ended on 9 

 November for the same reason. 



The data for all species combined for the two 

 areas are illustrated in Figures 6 and 7. The data for 



Figure 5. — Relative abundance of billfishes by time of 

 day. South Pass and northwest Florida combined, 1971. 



277 



