YOUNG JACK CREVALLES 



431 



by an increased pectoral growth rate. This occurs 

 at the smallest body sizes in latus and hippos 

 (approximately 43 mm. and 54 mm.) and at the 

 largest in ruber, bartholomaei, and crysos (approxi- 

 mately 75 mm., 75 mm., and 70 mm.). Preceding 

 their inflections, bartholomaei and hippo* appar- 

 ently have the fastest pectoral growth rates and 

 crysos the slowest (0.27-mm. and 0.195-mm. in- 

 crease in pectoral length per 1.0-mm. increase in 

 standard length). Subsequent to these inflections, 

 crysos apparently lias the fastest pectoral growth 

 rate and latus the slowest (0.41-mm. and 0.37-mm. 

 increase in pectoral length per 1.0-mm. increase 

 in standard length). Above approximately 20 

 mm., bartholomaei, latus, and hippos apparently 

 average greater pectoral lengths than crysos and 

 ruber; and above approximately 65 mm., latus and 

 hippos apparently average the greatest pectoral 

 length and ruber the least at comparable body 

 lengths. 



Pelvic. — 1-5. Generally, similar pelvic lengths 

 occur at corresponding body sizes in all species. 

 C. dentex may evidence a significantly greater 

 pelvic length than the other species above 110 or 

 130 mm. standard length. 



Body depth. — A composite graph of the regres- 

 sion lines for body depth at pelvic on standard 

 length of the five common species is shown in 

 figure 7. At approximately 23 or 24 mm. stand- 

 ard length, crysos and ruber have inflections fol- 

 lowed by a decrease in body-depth growth rate; 

 and similar inflections are suspected to occur at 

 smaller sizes in the other three species. The 

 species can be adequately compared between 24 

 mm. and 88 mm. C. bartholomaei apparently has 

 the fastest body-depth growth rate and crysos and 

 ruber the slowest (0.39-mm. and 0.29-mm. in- 

 crease in body depth per 1.0-mm. increase in 

 standard length). C. bartholomaei apparently 

 averages the greatest body depth and crysos the 

 least at comparable body lengths. C. dentex com- 

 pares in depth with ruber and crysos. The one 

 specimen of lugubris has a greater depth than 

 hippos at a comparable size. 



Figure 8 illustrates the relation of body depth 

 at pelvic to standard length for specimens of latus 

 and hippos of 30 mm. standard length and smaller. 

 The smallest specimen plotted of each (about 12.7 

 mm.) is damaged and tentatively identified, but 

 these coordinates represent fairly accurate meas- 

 urements. At sizes smaller than approximately 



o 

 > 



UJ 

 Q- 



£' 



h- 



0_ 

 LU 

 Q 



> 

 Q 

 O 

 CD 



10 15 20 25 30 



STANDARD LENGTH IN MM. 



Figure 8. — Caranx latus and C. hippos: Relation of body 

 depth at pelvic to standard length for specimens 30 

 mm. standard length and smaller. 



25 mm., latus averages a lesser body depth than 

 hippos. 



Figure 9 illustrates differences in depth at pelvic 

 of specimens below 10 mm. — the "latus and/or 

 hippos" series averages a greater depth than 

 crysos and bartholomaei. 



Shapiro (1943: 94) graphically illustrated hippos 

 (116 to 312 mm., measured from snout to least 

 depth of peduncle) to be relatively heavier than 

 crysos (96 to 203 mm., snout to least depth of 

 peduncle) with a tendency for convergence of 



X 

 H 

 0- 



o 



CD 



i ' r 



crysos 



latus ond/or hippos 

 , bartholomaei 



"" 



T 



STANDARD LENGTH IN MM. 



Figure 9. — Caranx crysos, Caranx sp. ("latus and/or 

 hippos"), and C. bartholomaei: Relation of body depth 

 at pelvic to standard length for specimens smaller than 

 10 mm. standard length. 



