Kntzer: Sex-specific growth and mortality, spawning season, and female maturation of Lut/anus carponotatus 



101 



male ages 2+: 

 y = -0.289x + 4.319 

 r 2 = 0.896 

 male ages with n 



0.844 



female ages 2+: 

 y = - 0.261 x + 4.557 

 r 2 = 0.872 

 4: female ages with n > 4: 



0.272X + 4.282 y = - 0.203x + 4.289 



0.879 



6 8 10 12 

 Age class (years) 



18 



Figure 5 



Age-based catch curves for female  higher elevation lines i and male (♦. lower 

 elevation lines) Lutjanus carponotatus at the Palm Island group fitted to all age 

 classes >1 (solid lines I and age classes >1 with n >4 (dashed lines I. Open symbols 

 represent age class 1, which was not used in the analysis. 



lines across body sizes (Fig. 9A). This suggests that on 

 average GW at stage IV during peak spawning months is 

 a linear function of TW. Lizard Island group fish generally 

 had larger ovaries at a given size than did Palm Island 

 group fish (Fig. 9A), a difference supported by ANCOVA 

 (df=l, 125; F=34.7; P<0.001). In fact, regression slopes of 

 0.25 and 0.52 suggest relative ovary weights at the Lizard 

 Island group were approximately twice as large as those 

 at the Palm Island group. There were no differences in 

 the GW-TW relationship among October, November, and 

 December at the Palm Island group, and therefore the dif- 

 ferences in this relationship between the island groups was 



consistent whether only the Palm Island group October 

 data were used or whether the October through December 

 data were used. 



Although GW is a linear function of TW, the nonzero 

 regression constants (Fig. 9A) mean that GW is not a con- 

 stant proportion of TW. Consequently, GSI increases with 

 increasing TW ( Fig. 9B ). The relationship between TW and 

 GSI is not strong, with regression slopes close to zero and 

 low r 2 values at both island groups (Fig. 9B). Despite this, 

 the relationship is statistically strong at both the Palm 

 ( ANOVA: df=l,82; F=12.70; P=0.006) and Lizard (ANOVA: 

 df= 1,42; F=22.95; P<0.0001) Island groups. Also, there is 



