Love and Johnson: Life history of Sebastes rastrelllger and S. auriculatus 



103 



determine if any difference was simply an artifact 

 caused by the larger female gonads. 



For grass rockfish, 86 males and 73 females were 

 measured and weighed. Although female grass rock- 

 fish tended to be heavier than males at a given length 

 (T-test, ^=2.21, P<0.05), the difference was not evi- 

 dent when gonad weight was subtracted from total 

 body weight (T-test, ^=1.66, P>0.05), and we there- 

 fore have combined these data into a single figure 

 (Fig. 2). 



A total of 116 male and 102 female brown rockfish 

 were sampled. For brown rockfish, there was no sig- 



nificant difference in weight at a given length between 

 males and females (T-test, ^=0, P>0.05); we have also 

 combined these data into a single figure (Fig. 2 ). 



Length and age at first maturity 



For these analyses, we examined 53 female and 64 

 male grass rockfish and 135 female and 129 male 

 brown rockfish. Both male and female grass rock- 

 fish matured over relatively narrow length and age 

 intervals (Table 1; Fig. 3). Both sexes began to ma- 

 ture at 22 cm and all fish were mature by 28 cm. 



