226 



Fishery Bulletin 94(2). 1 996 



where weight (W) is in grams and age (d) is mea- 

 sured in days (Fig. 7B). These curves gave instanta- 

 neous daily growth rates of 0.8% and 1.5% in length 

 and of 1.8% and 3.1% in weight for females and males, 

 respectively. Thus, female growth in length and 

 weight was generally slower than that for males. 



The estimated growth curves also indicated dif- 

 ferences in growth rate between hatching seasons 

 for both sexes. Length-at-age curves for female squid 

 hatched during June-October (L FJO ) and female squid 

 hatched during November-May (L FNM ) were (Fig. 8A): 



L F,JO {d > = 



.3I16e 



(I.IIOXId 



"F.NM 



(d) = 3.7828e 



0.0050d 



(12) 



Weight-at-age curves for female squid hatched dur- 

 ing June-October W FJ0 ) and female squid hatched 

 during November-May (W FW ) were (Fig. 8B): 



during November-May, respectively. Thus, female 

 growth rate in length and weight was generally more 

 rapid for June-October hatched squid. 



Differences in growth rate between hatching sea- 

 sons were also evident for male squid. In particular, 

 male growth in length (Fig. 9A) was more rapid at 

 younger ages (<225 d) for June-October hatched 

 squid than for November-May hatched squid. In con- 

 trast, male growth in length was estimated to be more 

 rapid at older ages (>225 d) for November-May 

 hatched squid than for June-October hatched squid 

 ( Fig. 9A ). However, this comparison should be viewed 

 with caution because the sample size of older males 

 hatched during November-May available for esti- 

 mating the length-at-age curve was small. Weight- 

 at-age curves (Fig. 9B) for male squid hatched dur- 

 ing June-October (W MJO ) and male squid hatched 

 during November-May (W M NM ) were 



W F ,J„(d) : 



0.9820e 



D.IIII.W 



W fiJVM (d) = 3.0617e - 0124d . 



(13) 



These curves gave instantaneous daily growth rates 

 of 0.8% and 0.5% in length and of 1.9% and 1.2% in 

 weight for females hatched during June-October and 



W MJ0 {d) = 0.3917e 00268d 

 W MNM (d) = 0.3l90e om56d . 



(14) 



These curves gave instantaneous daily growth rates 

 of 2.7% and 2.6% of body weight for males hatched 



