468 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Table 12. — Surface temperatures and salinities for times 

 and locations of capture of 41 specimens of Kyphosus 

 incisor 



(Data from the Theodore N. Gill cruise reports, unpublUhed lists of the 

 Silver Bay, and seining records of the Bureau of Commercial Fisheries 

 Biological Laboratory, Brunswick, Ga., specimens arranged by size] 



1 Taken 10 meters below the surface. 



is greatest during the spring and summer. It 

 appears that the growth rate for juveniles may 

 be as low as 10 mm. per month; however, my data 

 were insufficient to establish the rate. 



BODY PROPORTIONS OF KYPHOSUS 

 SECTATRIX AND KYPHOSUS INCISOR 



Eye diameter. — The relation of eye diameter to 

 standard length indicates a very gradual decrease 

 in rate of increase during growth, with no distinct 

 inflections (fig. 12). 



Eye diameter expressed as percentage of 

 standard length ranged 11.2-16.5 percent from 

 8.5 to 30 mm., 10.4-13.4 percent from 30 to 60 mm., 

 8.3-12.0 percent from 60 to 150 mm., and 6.9-10.2 

 percent from 150 to 260 mm. (table 13). 



Head length. — The relation of head length to 

 standard length indicates a nearly constant rate 

 of increase to about 50-60 mm. An inflection 

 occurs at this size, with the rate of increase beyond 



50-60 mm. constant but slightly lower than 

 initially (fig. 13). 



Head length expressed as percentage of standard 

 length ranged 31.7-38.8 percent from 8.5 to 30 mm., 

 31.3-36.7 percent from 30 to 50 mm., 31.3-34.5 per- 

 cent from 50 to 100 mm., and 25.5-32.0 percent from 

 100 to 260 mm. (table 13). 



Body depth at pelvic fin. — The relation of body 

 depth at pelvic fin to standard length shows a 

 nearly constnt rate of increase through all sizes 

 (fig. 14). 



Body depth at pelvic fin expressed as percentage 

 of standard length ranged 31.8-40.7 percent from 

 8.5 to 15 mm., 34.8-44.0 percent from 15 to 30 mm., 

 and 38.4-47.7 percent from 30 to 260 mm. (table 

 13). 



Snout to dorsal fin. — The relation of distance 

 from snout to dorsal fin to standard length 

 indicates a constant rate of increase through all 

 sizes (fig. 15). 



Distance from snout to dorsal fin expressed as 

 percentage of standard length ranged 42.8-50.6 

 percent from 8.5 to 30 mm. and 38.8-47.5 percent 

 from 30 to 260 mm. (table 13). 



Snout to anal fin. — The relation of distance from 

 snout to anal fin to standard length indicates a 

 uniform rate of increase through all sizes (fig. 16). 



Distance from snout to anal fin expressed as 

 percentage of standard length ranged 60.8-68.4 

 percent from 8.5 to 20 nun. and 58.0-68.8 percent 

 from 20 to 260 mm. (table 13). 



Snout to pectoral fin. — The relation of distance 

 from snout to pectoral fin to standard length 

 shows an inflection in rate of increase at about 

 50-60 mm., with the rate beyond 50-60 mm. 

 constant but lower than the initial rate (fig. 17). 



Distance from snout to pectoral fin expressed 

 as percentage of standard length ranged 31.3-40.0 

 percent from 8.5 to 20 mm., 28.7-36.8 percent 

 from 20 to 60 mm., 26.6-31.2 percent from 60 to 

 140 mm., and 24.5-28.7 percent from 140 to 260 

 mm. (table 13). 



Snout to pelvic fin. — The relation of distance 

 from snout to pelvic fin to standard length shows 

 a very gradual reduction in rate of increase from 

 the smallest size to about 50-60 mm., after which 

 the rate of increase appears constant and less than 

 initially (fig. 18). 



Distance from snout to pelvic fin expressed as 

 percentage of standard length ranged 39.3-48.4 



