THRESHER ET AL.: LARVAE OF GADOID. MACRURONUS NOVAEZELANDIAE 

 40 



C 



30 



20 . 



10 



40 



30 



20 



10 



S^^ 



0628-0701 h 



20 July 1985 



n = 84 



0521-0649 h 



19 July 1985 



n = 240 



2.5 3.5 4.5 5.5 



Size of Larvae (mm TL) 



6.5 



7.5 



6 



3 



3.5 4 4.5 



Size of Larvae (mm TL) 



5.5 



Figure 2.— A. Size-frequency distributions of larval Maeruronus rwvaezelandiae collected 

 in tows near a drogue at the onset and end of a 26 h sampling period. Arrows indicate ap- 

 parent progression of the modes. B. Correlation between larval total length and number 

 of postfirst-feeding increments for pooled subsample of larvae drawn from populations in 

 2A. The correlation is significant at P« 0.01 and accounts for 86% of the variance in number 

 of increments. 



growth increments in these larvae was estimated 

 by drawing subsamples from both populations, pro- 

 portional to the number of individuals in each 0.25 

 mm size class, and regressing increment nimiber 



against larval size. The relationship is linear and 

 highly significant (Fig. 2B). Based on the least 

 squares regression of increment number on SL, a 

 change in mean larval size of 0.24 mm corresponded 



33 



