FISHERY BULLETIN: VOL. 81, NO. 2 



Model I 



Model H 



0.4 - 



s = 4l.3 cm/sec 

 h= 14 hour/day 



i • '- 1 - 



- 'f.K 



r,K 



_ L K 



0.3 



0.2 



o 

 or 



0.1 







% Body kcal/Day (A4) 



- 4.0 



- 2.4 



0.8 



s = Observed 

 h=l4 hours/day 



- 1 ' I- 1.'- tl*"". 1 " * »%2^i "'"*.Cr **?*,' 





 0.0030 0.0060 0.0030 0.0060 0.0090 



PLANKTON CONCENTRATION (c.kcal/*) 



o 



z 



0.6 w 

 o 



Ul 



0.4 x 



I- 



=S 



o 



0.2 g 



CO 

 CO 



o 



or 

 o 



FIGURE 7.— Comparison of the Model I nitrogen budget where foraging speed and foraging time 

 remain constant while plankton concentration increases, with the Model II budget incorporating 

 the observed swimming speeds of the Atlantic menhaden at each plankton concentration. 



190 



