YOUNG JACK CREVALLES 



477 



40 



30 



X 

 h- 

 O 



< 



<r 20 



o 



CO 



~i 1 1 r 



"i 1 1 r 



T — i — i — i — | — i — i — i — i — i — i — i — i — r 



"1 r 



J I I L 



1 1 1 1 1 1 1 1 1 I I I I 1 I I I I I 



100 150 200 



STANDARD LENGTH IN MM. 



250 



J l I L 



30 



20 





Q. 



— 10 < 

 CO 



o 



Q 

 Q 



tr 



x 



300 



Figure 55. — Caranx bartholomaei: Relation of length of first dorsal soft-ray and of third dorsal spine to standard length. 



10.5 mm. Branching begins at about 10 mm. 

 (fig. 50) and is pronounced at about 16 mm. (fig. 

 52). Forking of the tail is represented by a slight 

 indentation at 6.0 mm. (fig. 48) and is pronounced 

 at 8.0 mm. (fig. 49). The urostyle is visible at 

 6.0 mm. (fig. 48) but not at 8.1 mm. (fig. 49). 



Pectoral. — 1-19 to 21. About 14 rays are de- 

 veloped at 6.0 mm. standard length (fig. 48), and 

 the full complement apparently is formed at 8.1 

 mm. Branching of the rays has begun by 25 mm. 

 The distal end of the fin is rounded from 6.0 mm. 

 to about 35 mm., above which it becomes pointed 



489286 O— 59 5 



and falcation begins (figs. 48 to 53). Falcation 

 is pronounced by 95 mm. (fig. 54). 



The regression of pectoral length on standard 

 length is shown in figure 56 and table 11. Two 

 lines were fitted to this regression: for specimens 

 from 8.1 to 66.5 mm. and for specimens from 66.5 

 to 243 mm. standard length. An extension of the 

 lower line intersects the upper line at approxi- 

 mately 75 mm., indicating that an inflection occurs 

 at about that size and that a faster pectoral growth 

 rate prevails above that size. The proportional 

 rates of increase for the two variates are 0.27-mm. 



