10. GROWTH, MATURITY AND MORTALITY
299
average, as Lasker points out. Nevertheless, these experiments show
what individuals are capable of and allow better assessments to be
made of growth curves compted from analyses of natural populations.
Lasker examined increase in dry weight of E. paciJica maintained in
the laboratory and found a maximum rate of increase of 0.015 mg
FIU. 114. Growth in length of three juvenile (upper) and four adult (lower figure)
(After
Euphccusia paci$ca maintained in the laboratory et approximately 10°C.
Lasker, 1966.)
(G 0.087 mg wet wt) but it ranged as low as 0.004 mg per day
( 2 0.023 mg wet wt per day). This is somewhat below the required rate
of weight increases as suggested in Ponomareva’s (1963) data for
this species where an increment of about 0-025mgdrywt per day
(= 0.146 mg wet wt per day) seems to take place in the natural
environment.
299
average, as Lasker points out. Nevertheless, these experiments show
what individuals are capable of and allow better assessments to be
made of growth curves compted from analyses of natural populations.
Lasker examined increase in dry weight of E. paciJica maintained in
the laboratory and found a maximum rate of increase of 0.015 mg
FIU. 114. Growth in length of three juvenile (upper) and four adult (lower figure)
(After
Euphccusia paci$ca maintained in the laboratory et approximately 10°C.
Lasker, 1966.)
(G 0.087 mg wet wt) but it ranged as low as 0.004 mg per day
( 2 0.023 mg wet wt per day). This is somewhat below the required rate
of weight increases as suggested in Ponomareva’s (1963) data for
this species where an increment of about 0-025mgdrywt per day
(= 0.146 mg wet wt per day) seems to take place in the natural
environment.