STRUHSAKER and UCHIYAMA: AGE AND GROWTH OF STOLEPHORUS PURPUREUS 



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AGE (DAYS) 



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AGE (DAYS) 



Figure 6. — Stolephorus purpureas: Age-length relations of 213 Individuals from 13 collections in Kaneohe Bay. A: 19 March 1972 (21 

 individuals, 66-189 days); April 1972 ( 13, 1-24); 1 May 1972 (11, 6-12); 26 May 1972 ( 16, 21-68). B: 26 August 1972 (all specimens). C: 7 

 October 1972 (8, 16-23); 14 October 1972 (23, 19-62); 19 October 1972 (13, 99-148); 25 October 1972 (9,3-9). D: 12 February 1973 (12, 60- 

 87), (11, 115-140); 19 March 1973 (15, 78-125). E: 5 May 1973 (8, 40-69); 13 July 1973 (27, 66-136). F: Composite scattergram of all 

 observations. 



size (cf, Nakamura 1970, fig. 4). Thus, much 

 growth of individual nehu is directed to allometric 

 growth of body depth, rather than body length. 

 The growth rate of young nehu (<17 mm) indi- 

 cated by the composite scattergram is consistent 

 with the estimates of larval growth rates pre- 

 sented by Tester (1951) and Yamashita (1951). 



The possibility that the inflection at 15-17 mm 

 is related to a change in diet was examined. 

 Burdick (1969) investigated the feeding habits of 

 larval nehu from hatching to a length of 25 mm in 

 Kaneohe Bay. He found that young nehu less than 

 5 mm long fed almost exclusively on copepod 

 nauplii. At lengths of 5-7 mm, the diet shifted to a 



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