G-19 



Table 8.10. Constants of the Bertallanfy curve for N. roasil rosali from Kerguelen. 



Table 8.11. Size at age information for Notothenia roosii marmorata Tram South Georgia 



(Olsen I954) 



Bertallanfy curves were fitted to the data for South Georgia with the constanta that are eet 

 out in Table 8.12 (Everson 1970). 



Table 8.12. Constants of the Bertallanfy curve applied to data of Olsen (1954) for 

 Notothenia rossii from South Georgia. 



Tlie change in the growth pattern had previously been deocribed by Olsen (1954) as being 

 coincident to, and therefore probably a result of, the offshore migration of the fish. 



The age determination methods employed by Olaen and Hureau in their studies were based 

 mainly on otolith examination although they both examined scales as a check. Crisp and 

 Carrick (1975)) from examination of the scales from fish of known size cau^t at Leith 

 Harbour, South Georgia, were able to corroborate Olsen's size at age estimates both by 

 direct comparison and by back calculation based on the ratio of scald length to total length 

 corrected for allometry. Their rosulto confirm the growth pattern described by Olsen for 

 the first few years and also indicate that this techniqute is of great use in obtaining the 

 maximum amount of information from small samples. 



Notothenia magellanica 



The only published information on growth of this species is from fish oau^t at 

 Kerguelen (Hureau 1970). The relevant information is given in Table 6.13. 



