Newman et al.: Variability in the population structure of Lutjanus adetu and L quinquelineatus 



321 



parison of slopes indicated that the mortality rate at 

 Rib Reef was significantly lower than that at all other 

 reefs (RI<[JB=LO=KL]). 



Individual L. quinquelineatus <5 years of age were 

 usually not fully recruited in the sampled popula- 

 tion and were excluded from the mortality estimates 



derived from catch curves. Estimates of mortality 

 with high coefficients of determination were obtain- 

 able from only two reefs, LO and MR. The other reefs 

 had a poor fit to the catch-curve regressions (Fig. 7), 

 and hence mortality rates were not obtained either 

 because there was a persistence of numerous strong 



Eh 



120 

 xo 



.1" 

 II 



280 



240 

 200 

 160 

 120 



xo 



40 



II 



IJ 2 4 (. X 10 12 14 16 IX 20 22 24 



I) 2 4 (i X 10 12 14 II. IX 20 22 24 



Loik'stone 



/., 270.4(]-p OL " 6 <" 86l3 >) 

 r 2 - 0.462 



2 4 X 10 12 14 Id IX 211 22 24 



Kclsii 



i,= 296.8(l-<r 004( *'l'* 322 2>) 

 r 2 - 0.333 



2 4 I. X 10 12 14 l(> IX 211 22 24 



Aye (years) 



Figure 4 



Von Bertalanffy growth curves and observed length 

 at age for L. adetii among individual reefs in the 

 central Great Barrier Reef. 



