FISHERY BULLETIN: VOL. 84, NO. 4 



system (days 108-248) and the growth curve showed 

 a logarithmic increase (W = 6.283 x 10" 7 t SM0 ; r 2 

 = 0.92). Hence, younger squid grew at an exponen- 

 tial rate and growth slowed to a logarithmic rate 

 in older squid. 



Squid exhibited fast exponential growth for the 

 first 2 mo in L.O. 1982 and slower logarithmic 

 growth thereafter (Fig. 9). Wet weight data from 



live animals in L.O. 1982 indicated a mean growth 

 rate of 8.35% increase in body weight per day for 

 the first 2 mo. Mantle length increased 3.19%/day 

 or the equivalent of 8 mm/month. The squid were 

 doubling their weight every 8 d and doubling their 

 length every 21 d. Growth rates declined from 

 5.6%/day WW at day 60 (and 2.2%/day mm ML) to 

 1.6%/day WW (and 0.63%/day mm ML) at day 240. 



B 



.25 



3 20 



X 



a .15 



UJ 



uJ .10 

 .05 



L.O. 1 982 Live Loligo opalescens 

 W = 0.0023e° ° 835 ' r 2 = 98 



V/-I— 

 20 



30 40 

 DAYS 



50 



60 



50 



40 



H 30 



X 



CD 



UJ 



UJ 



20 



10 



L.O. 1982 Dead Loligo opalescens 

 W = 0.3894 x 10" 7 t 3827 ; r 2 = 0.98 



E 

 £ 



x 

 h- 

 o 



z 



UJ 



_J 



UJ 



< 



2 



15 - L= 2.73 



10 



L.O. 1 982 Live Loligo opalescens 



,00319 1 



V 



20 



— i — 

 30 



40 

 DAYS 



— i — 

 50 



60 



E 

 E 



X 



\- 

 o 



z 



UJ 



< 



2 



100 



50 



10 



L0. 1982 Dead Loligo opalescens 



*# 



i — 

 50 



100 



150 

 DAYS 



200 



235 



Figure 9.— Early exponential growth of Loligo opalescens in experiment L.O. 1982: A, Live wet weight, illustrating exponential growth 

 through day 60. B, Dead wet weight, illustrating logarithmic growth from day 60 to maturity. C, Live mantle length measurements, 

 showing exponential growth as in A. D, Dead mantle length measurements, showing logarithmic growth to maturity as in B. Numbers 

 above rectangles indicate actual number of squid measured for that mean. 



784 



