464 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



8 



70 



60 



50 — 



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40 



Q. 

 Ld 

 Q 



> 

 Q 

 O 

 DD 



30 



20 



10 



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/ 

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J I 1 L 



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70 



60 



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20 



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100 150 200 



STANDARD LENGTH IN MM. 



250 



300 



Figure 41. — Caranx ruber: Relation of body depth at pelvic and of head length to standard length. 



alinement of the coordinates of the four largest 

 specimens above the extension of the calculated 

 regression line suggests an increase in head growth 

 rate at some size around 118 mm. 



Eye. — The regression of eye diameter on stand- 

 ard length is shown in figure 42 and table 7. Two 

 lines were fitted to this regression: for specimens 

 from 12.4 to 34.1 mm. and from 34.1 to 106 mm. 

 standard length. The lines intersect at approxi- 

 mately 34 mm., indicating that an inflection occurs 



at about that size and that a slower growth rate 

 prevails above that size. The proportional rates 

 of increase for the two variates are 0.08-mm. 

 (below 34 mm.) and 0.058-mm. (above 34 mm.) 

 increase in eye diameter per 1.0-mm. increase 

 in standard length. The coordinates of the six 

 specimens larger than 106 mm. fall well above the 

 extension of the calculated regression line, indi- 

 cating an increase in eye growth rate around 

 106 mm. 



