339
(Lee et al. 1994), 220–300 days (Forsythe et al. 2001), 169–262 days (Walsh et al.
2002), and 161–315 days (Ikeda et al. 2009a). Because cephalopod life spans may
be controlled by programmed death (Wodinsky 1977), and cephalopods are terminal spawners, the early maturation of cultured squid must also induce early death
(i.e. short life span).
Fig. 17.11 Temperature
regime for Sepioteuthis lessoniana measured in captivity
( solid line) and estimated
in nature ( dotted line), the
progress of dorsal mantle
length ( ML), female gonad
somatic index ( GSI), and
male testis index ( TI) of cultured and wild-caught squid
by date ( X, cultured squid
of unknown sex; +, cultured
squid; W, wild-caught squid).
Data for wild-caught squid
are expressed as means with
maximum and minimum
values. Lines in the ML graph
show hypothesized growth
lines. (From Ikeda et al.
2009a)
17 Sepioteuthis lessoniana
(Lee et al. 1994), 220–300 days (Forsythe et al. 2001), 169–262 days (Walsh et al.
2002), and 161–315 days (Ikeda et al. 2009a). Because cephalopod life spans may
be controlled by programmed death (Wodinsky 1977), and cephalopods are terminal spawners, the early maturation of cultured squid must also induce early death
(i.e. short life span).
Fig. 17.11 Temperature
regime for Sepioteuthis lessoniana measured in captivity
( solid line) and estimated
in nature ( dotted line), the
progress of dorsal mantle
length ( ML), female gonad
somatic index ( GSI), and
male testis index ( TI) of cultured and wild-caught squid
by date ( X, cultured squid
of unknown sex; +, cultured
squid; W, wild-caught squid).
Data for wild-caught squid
are expressed as means with
maximum and minimum
values. Lines in the ML graph
show hypothesized growth
lines. (From Ikeda et al.
2009a)
17 Sepioteuthis lessoniana