FISHERY BULLETIN: VOL. 74, NO. 1 



001 Li. 



AGE (doys) 



Figure 3. — Laird-Gompertz growth curve for dry weight of 

 anchovy larvae in experiment 5. Points are average weight 

 of larvae weighed in groups of 15-26 larvae each. Equation 

 for curve given in text; parameters for equation in Table 2. 



other hand, larval anchovy, after they absorb 

 their yolk, survive only 1 to 2 days without food 

 (Lasker et al. 1970). The point at which this 

 extreme vulnerability to starvation ends is essen- 

 tial information for any model of anchovy ecology 

 and survival. 



In this experiment fish reared to metamor- 

 phosis in experiment 5 were used. At age 74 days 

 a group of 53 fish (group 1) and one of 73 (group 2) 

 were placed into tanks containing only filtered 

 seawater and a sample of 29 fish was taken for 

 length and weight measurements. The tanks 



lOOOr 



50.0- 



10.0 



50 



E 



I 



10 



5 05 



Q 



01 



0.05 



001 



I I ' 111 



5 10 20 



LENGTH (mm) 



50 



100 



Figure 4. — Length-weight relationship of anchovy larvae 

 reared in experiment 5. Equation for curve given in text; 

 parameters for equation in Table 2. 



were the same as those described for the rearing 

 experiments and temperature was maintained at 

 16°C. Artemia nauplii were offered to group 1 

 after 12 days of starvation and to group 2 after 15 

 days; the experiment ended after 20 days. Daily 

 records were kept of water temperature and 

 lengths of dead fish; after 20 days all surviving 

 fish were measured. Total lipid content was also 

 monitored through the course of the experiment. 



Table 3. — Parameters and 95% support plane' for Laird-Gompertz growth equation for length, experiments 1-5, and weight 



for experiment 5. Symbols and equations are given in text. 



'An approximation of the 95% confidence limits (Conway et al. 1970) 



86 



