FISHERY BULLETIN: VOL, 86, NO. 4 



60-, 

 50- 

 40- 

 30- 

 20- 

 10- 



REEF I 



TOTAL NUMBER 463 



ALL TAGGED 



NOT RECAPTURED 



_■ __ ^*- _; ,^ ., . : «i -^ //-, ,.r^ , — : IM m^ rf\ fr\ I \ 





O'^CMtDCOOCM^CDcnOCNJ 



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h- r^ r^ oD 



CO 



{I. 



LU 



h- 

 <S) 



m 

 O 



O 

 cc 



LU 

 CD 



REEF III 

 TOTAL 1 202 

 DTAGGED 304 

 REMOVED 

 NOT RECAPTURED 



u^Lnir)inincr>LninuitnuiLnLnij^ir)inu^ir)inir)iouiu7ini/^inir>Lnin 



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Ln LO If) in lO (O 



(O CO 



(O 



O CM rj- U3 OO O 



t-^ r^ r^ r^ r^ co 



REEF V 



TOTAL 1141 



ALL TAGGED 



NOT RECAPTURED 



Lnuiu^LOuiLnLOir)ur>LnLOuii-nLr)LOLr)u')LnLOLOLOir)Lnu')Lr)LOuo 

 Tt(bo6c)c\ittcbcdoc\i'<s-cbc6oc>j ■^cbc6oc\J'^uDopoc\J'^u3 



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CARAPACE LENGTH (mm) 



Figure 2.— Size-frequency distributions of juvenile Panulirus cygnus in January 1981 on three test reefs 

 (reefs I, III, and V) at Seven Mile Beach, Western Australia and size-frequency distributions of animals 

 removed or tagged. Size-frequency distributions of tagged animals not subsequently recaptured also are 

 indicated. 



>3 years on reef III was slightly lower than that for 

 juveniles on reefs I and V. Comparison of the esti- 

 mates of population size on which these mortality 

 coefficients were based showed that annual survival 

 of animals ^3 years old was significantly higher on 

 reef III than on reef V (chi-square test of indepen- 

 dence, P < 0.005). 



The numbers of juveniles tagged and released on 

 each test reef in January 1981 are shown in Table 

 1, while the numbers and percentages of those same 

 individuals recaptured on the same reef in January 

 or February 1982 are summarized in Table 3 for 

 each age group. These data were used, in part, to 

 provide more specific estimates of age-specific sur- 



778 



