IS-7209 ‘ J IS 7303 
NOVEMBER 1972 r JANUARY 1973 
LARVAE (number per 10m?) - LARVAE (number per 10m?) 
B6°~W Baw 
A 
SS 
IS-7308 FAAS IS-7311 
MAY 1973 30°N JUNE-JULY 1973 \ 30°N 
LARVAE (number per 10m2! i BD 50 LARVAE (number per 10m2) _—\ 
Son 
e ° e e 
ben 
|26°N 
24°N 
Figure 4.—Continued. 
10 
