94 



J. Douglas Oliver 



Gambusia affinis 

 AUGUST 



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a 80 

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1 60 



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I '■» I i i i I ■ i i I i i i I i i » I — i i i i i i i ■ i 9 i ■ 



NOON 4PM 8PM MIDNT 4AM 8AM NOON 4PM 8PM 



I i i i I i i i 



Fig. 1. Foregut content of and food consumption by Gambusia affinis in 

 summer. In the upper panel, filled circles and solid lines show diel content 

 trends in field fish; open squares and dashed lines show changes in content of 

 fish held in food-free tanks. In the lower panel, filled circles and solid lines show 

 trends in consumption during each time period; the open circle and dotted lines 

 show the presumed trend based on difference between the final (1630 hours) and 

 initial (2050 hours) consumption values. 



