Ferreira and Russ: Population structure of Plectropomus leopardus 



635 



CLOSED 



SO 5S 60 6S 



I ork I cngth (cm) 

 GLOW 



12 14 



Age (years) 



Age (years) 



OPEN 



Age (years) 

 HOPKINSON 



Fork length (cm) 

 HOPKINSON 



10 12 



Figure 4 



Size- and age-frequency distribution of leopard coralgrouper, Plectropomus leopardus, for each reef, 

 1990 and 1991 data combined. 



transitional-stage fish were not significantly differ- 

 ent between reefs (FL:P=0.24, log(age),P=0.11). Size 

 of young males was not significantly different be- 

 tween reefs (P=0.2) but ages of young males were 

 significantly different (P=0.03); young males from 

 Glow were significantly older than young males from 



Grub (post hoc, P<0.05). Age of mature males was 

 not significantly different between reefs (P=0.22). 

 However size of mature males varied significantly 

 between reefs (P=0.001); mature males at Yankee 

 were significantly smaller than mature males at 

 Hopkinson (post hoc P<0.05). 



