7- 



ITft 



0CT.-NOV0EC 

 N>SO 



1MI fk n n n 



X 



4i r " 



HIhT 



JAN-FEB-MAR 

 H*94 



O °" 



ae 



a> 



S 6- 



z 4 _ 



2— 



APR- MAY -JUNE 



rl 1 1 IT — 1 1 1 rm rm n n n n 



7 — 



K n 



JULYAUQ.-SEPT 

 N'22 



Tm ITn n 





^ ill 



* so-s? 1 67-64 1 74-» 



II 



1 S6-8B j 96-100 I 



> I 



0-111 1 117-11* 



1 i ' 



134-136 1 144-t4« 1 



Figure 4. — Length frequency distributions by quarters of 

 the year for king mackerel sampled from a taxidermy 

 plant in south Florida from September 1967 through 

 September 1968. 



SA-Sa 6B-7 



»C t; 97-94 !04-i06 II6-IIB 17«-'30 W0-L4J ISJ-154 



FORK LENGTH (CM.) 



Z 



OCT.-NOV.-06C 

 N--89 



ij 



n 



Jlttaiui 



rl 



n ,n cfl 



JAN-FEB-MAR. 

 N=142 



tbJL, 



-rrJ> 



jf. 



APR-MAY-JUNE 

 N^84 



tk n 



JULY-AUGrSEPT 

 N>26 



* 31-32 I 39-40 47-4* I SS"S6 I 63-64 1 71-73 I 79-80 I 87-88 



35-36 43-- 



-S3 S9-60 67-68 71-76 83-84 



FORK LENGTH (CMJ 



Figure 5. — Length frequency distributions by quarters of 

 the year for blackfin tuna sampled from a taxidermy 

 plant in south Florida from September 1967 through 

 September 1968. 



LENGTH-WEIGHT RELATIONS 



The relation between length and weight for 

 each species was calculated by the method of 

 least squares with the equation 



W = aL b 



where W is weight in kilograms, L is fork 

 length in centimeters, and a and b are constants 

 (table 1). Calculated weights for a given 

 length- -within the length range sampled--are 

 shown for each species in table 2. 



log 10 W- log 10 a / b log 10 L 



