THEILACKER: FEEDING AND GROWTH OF NORTHERN ANCHOVY 



em anchovy fed the low-density diet (Tables 10, 11). 

 Mean gross-growth efficiency (days 5-14) based on 

 dry weight was 0.30 for the high-density diet and 



0.37 for the low-density diet. Based on calories, 

 mean gross-growth efficiencies were 0.37 and 0.46 

 respectively. 



35 



^ 30 



o> 



3. 



'q) 



5 20 



Q 



15 



FED 



1 4.5r- 



E 



^ 4.0 



o 



X) 



o 3.0 



STARVED 



• = 5-20 larvae 



Day 3 = first feeding 



5 6 7 3 4 5 



AGE IN DAYS 



Figure 4.— Changes in standard length and weight of fed and starved north- 

 ern anchow larvae over time. 



o 



< 



CO 

 UJ 



cr 

 O 



_i 

 < 

 o 



< 



> 

 < 

 a 



X 



g 



UJ 



X 



LU 

 O 



z 

 < 



X 



u 



.09 



.08 



.07 



.06 



.05 



.04 



.03 



.02 



.01 



Rotifers 25/ml 



Rotifers 2/ml 



.05 



.10 



.15 



.20 



CONSUMPTION/DAY AS CALORIES (F^.) 



Figure 5.— Gross growth efficiencies (W^/F^ ; Tables 10, 11) of north- 

 ern anchovy fed rotifers at 25/mL and at 2/mL. 



221 



