~ "1 



60- 





mf 



J 





w 



- 



50- 



m 



■W B 





5,40- 



> 



II 



- 















o 30- 



z 



1 1 , , 1 1 



1 1 1 1 1 1 





-|7 |t I 





■■ p^ 





20- 

 10- 



1 



V 





mm 



- 





197 



D 1971 



Su 1 A 



1972 



|w 1 



islsu 1 A |w llslsul A Iw lisl 



' 1973 ' 1974 ' 1975 





Figure 10. Frequency distribution of profile line surveys 

 by year and season. 



20 





























■ 



III 









- 















- 







1 





. 



- 

















1 







• 

















-. 









■ 



\ 











■ 













1 





■ 



1 











1 



,.: :,: i i A 





■ 





Dec. 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June |July 



Aug 



Sept 



Oct 



Nov. 





Figure 11. Frequency distribution of profile line surveys 

 by month and season. 



26 



