Lovrich and Vinuesa: Reproduction of Paralomis granulosa 



667 



i- 

 < 



tr 

 O 



cc 



O 



Q_ 



o 



0. 



20 



30 40 50 60 70 80 90 100 

 CARAPACE LENGTH (mm) 



10 20 30 40 50 60 70 80 90 100 

 CARAPACE LENGTH (mm) 



Figure 2 



Gonadal and morphometric maturity in Pardlomis granulosa. 

 Size at 50% maturity is given by the intersection between the 

 calculated logistic function and 0.5 ordinate. (A) Proportion 

 of mature P. granulosa on the basis of presence of spermato- 

 phores in 137 males and presence of eggs or empty egg cap- 

 sules in 732 females. (B) Proportion of mature P. granulosa 

 on the basis of allometric growth of chelae. 



Size at morphometric maturity was calculated for 

 851 females (11-88.8 mm CD and 759 males (6.5- 

 115.1mm CD. The slope of the regression of chela 

 height on carapace length for juvenile males (<49.1 mm 

 CL; slope=1.012) was significantly less (F=385.7; 

 P<0.001) than that for adult males (>70.2mm CL; 

 slope=1.473) (Fig. 3). The slope of the regression for 

 known juvenile females (<59.7mm CL; slope=0.96) was 

 significantly greater (F=223.0; P<0.001) than that of 

 adult females (>75.1mm CL; slope=0.84). Estimated 

 size at morphometric maturity 50% were 57.0 mm CL 



(959? confidence limits: 53.9-60.1) for males and 

 66.5 mm CL (95% confidence limits: 63.4-69.5) for fe- 

 males (Fig. 2B). These results indicated that the 

 method can be applied to both sexes. 



Embryogenesis 



Embryogenic development was divided into five stages 

 as follows: 



Embryonic Stage I (ES I): Spherical or slightly 

 ellipsoidal egg. Yolk bright yellow or orange. A peri- 

 vitelline space present between the chorionic mem- 

 brane and the yolk mass. No evidence of division. 





55 



CO. 



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o 



1.6 



1.5 

 1.4 

 1.3 

 1.2 

 1.1 

 1.0 

 0.9 

 0.8 

 0.7 

 0.6 

 0.5 



0.8 1.0 1.2 1.4 1.6 1.8 2.0 

 LOG (CARAPACE LENGTH, mm) 



FEMALES, N=851 



2.2 



B 



1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 

 LOG (CARAPACE LENGTH, mm) 



Figure 3 



Scattergrams of log right chela height on log carapace length 

 for 758 males (A) and 851 females (B) of Paralom is granu- 

 losa. Data for regenerated chelae were removed. Dotted line 

 shows the intersection of juvenile and mature regressions 

 and represents size at maturity: CL = 57 mm for males; CL = 

 66.5 mm for females. 



