26% on feeding day 2, and 67% on feeding day 8 

 (feeding day 2-8 mean = 39%). During the first 

 week of feeding, sea bass inspected more rotifers 

 per unit time than anchovies did, but struck at a 

 lower proportion of them. By the end of the week, 

 these differences had diminished. Although obser- 

 vations were made at all times of the day, no trend 

 with time of day was detected. 



FISHERY BULLETIN; VOL. 87, NO. 2, 1989 



Feeding Rate and Daily Ration 



Black sea bass feeding rates were considerably 

 higher than those of bay anchovies (Fig. 6). Daily 

 consumption of rotifers by anchovies increased from 

 4/h during the first feeding day to 13/h on feeding 

 day 8. Sea bass rotifer consumption rose from 11/h 

 on feeding day 1 to 17/h on feeding day 2, dropped 



Black Sea Bass 



0.800 



0.720 - 



0.640 



< 0.560 



9 

 > 

 5 



z 



3- 0.480 - 



z 

 g 



1- 



a. 

 2 



m 



z 

 o 

 u 



Ui 



a 



> 



X 



o 



0.400 



0.320 



0.240 



0.160 



0.080 



&=fed larvae 



ul oxygen =0.03383 e' 



R'= 0.835 



0.009425(hours) 



•=unfed larvae 

 <1 15 hours: 

 ^1 oxygen=0 3621-0. 005913(hours) + 0.0000327(hours)' i 



R'= 0.522 



>1 IShours; 

 ^1 oxygen=0.21 16-0.0007323(hours) 



R' = 0.778 



o^eggs 



^1 oxygen^ 009934+0 002072(hours) 

 R'= 0.884 



0.0036 



-0.0032 



0.0028 



-0.0024 



0.0020 s 



U 



0.0016 



0.0012 



0.0008 



- 0.0004 



20 40 60 80 Too 120 140 160 180 200 220 240 560 580 300 320 



HOURS AFTER FERTILIZATION 



Figure 4.— Hourly oxygen consumption by black sea bass eggs, unfed larvae, and fed larvae. 



286 



