Zug el a\ Age and growth of Hawaiian Chelonia 



121 



- lOOi 



w 80 



■^J^T-"-^  



Spline integration 



20 30 



Estimated age (yr) 



40 



50 



Figure 4 



Relationship betwoen observed carapace length and estimated age 

 (squares) for the two methods of age determination: correction factor 

 lAi and spline integration (B). Fitted gi'owth models (cui-ves) are cubic 

 smoothing splines. 



nological data (Fig. 7). In plotting the growth vectors 

 for marked (tagged) turtles, we fixed the origin of each 

 vector by assuming that the carapace length at time of 

 first capture was given exactly by the CF- or Sl-based 

 growth curve. The obsei-ved length at recapture and time 



at liberty then determined the cndpoint coordinates of the 

 growth vector. Despite considerable variation in the ob- 

 served gi'owth of the marked turtles, the growth vectors 

 were generally concordant with the growth model predic- 

 tions (Fig. 7). 



