FISHERY BULLETIN: VOL. 84, NO. 1 



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Coryphaenoides rupestris 



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200 400 600 800 1000 1200 1400 1600 



DEPTH (m.) 



Figure 16— The distribution of log transformed (log (x + 1)) abundance and weight of Coryphaenoides rupestris at each station, plotted 



against depth. 



one trawl C. armatus comprised 92.7% of the bentho- 

 pelagic fish numbers and 93.4% of the biomass. In 

 a 1-h trawl the maximum number captured was 76 

 and the maximum biomass was 21.2 kg. 



No increase in fish size with increased depth was 

 evident in the data (Fig. 19) (Table 1), and the slope 

 of the regression line for head length with depth was 

 not significantly different from zero. However, known 

 depth range of C. armatits was incompletely sam- 

 pled in this study, and further samples from greater 

 depth may lead to other conclusions. 



The distribution of numerical abundance and 

 weight with depth are shown in Figure 20. Cor- 

 yphaenoides armatus increased in abundance from 

 2,100 to 2,600 m, beyond which its abundance re- 

 mained constant. 



The regression lines for head length against log 

 (weight) were analyzed (Fig. 2). The solution for 

 males was log (weight) = 0.017 (head length) + 

 0.956, r 2 = 0.967, and for females it was log 

 (weight) = 0.016 (head length) + 1.029, r 2 = 0.972. 



The maturity stages of C. armatus against head 



52 



