94 



Fishery Bulletin 97(1), 1999 



10 



•1) 4 



w=l,879 



F^ 



1 



n 



r\ 



_i_iJ - 1 i :■ i 



lLA.ll lUJi ;: 1 :i i[ I 'I /AV/MW/A 



m 



36 40 44 48 52 56 60 64 68 72 76 80 



Total length (cm) 



Figure 2 



Length-frequency distribution for P. prometheus caught off the Canary Islands (August 

 1992-July 1995). 



tern was recorded for both sexes. Highest values oc- 

 curred between April and September, peaking dur- 

 ing June-July. From October to March the values 

 were low. 



No significant difference in length at sexual ma- 

 turity was found between males and females latest. 



immature individuals was from 36 to 38 cm. The 

 parameters of the total length to total weight rela- 

 tionship for males and females separately, and for 

 the population as a whole, are given in Table 4. No 

 significant difference in the allometric coefficient was 

 found between males and females (^-test, t- 



<=1. 31<<i,y:53grj=1.65). The length atwhichfifty percent \Ki<t^^Qr^.J„^ = \.(3b). Isometric growth was observed 



of the fish became mature was 47.41 cm TL (Fig. 4). 



Males were found to be between 38 and 80 cm TL, 

 females between 36 and 80 cm. The length range of 



in both sexes and for the whole population (Table 4). 

 Of the otoliths examined, 670 (86. 47? ) were read- 

 able and used for the study of age and growth. The 



