Age and growth of market squid (Loligo opalescens) off California during 1998

Authors
Butler, J Fuller, D Yaremko, M
Citation
J. Butler et al., Age and growth of market squid (Loligo opalescens) off California during 1998, CAL C O F I, 40, 1999, pp. 191-195
Citations number
26
Categorie Soggetti
Aquatic Sciences
Journal title
CALIFORNIA COOPERATIVE OCEANIC FISHERIES INVESTIGATIONS REPORTS
ISSN journal
05753317 → ACNP
Volume
40
Year of publication
1999
Pages
191 - 195
Database
ISI
SICI code
0575-3317(199910)40:<191:AAGOMS>2.0.ZU;2-F
Abstract
Daily increments in statoliths indicate that both male and female market sq uid (Loligo opalescens) mature as early as 6 months after hatching. An anal ysis of 192 statolith pairs revealed maximum ages of 238 days for females a nd 243 days for males during 1998. These ages indicate that market squid ma y be a semiannual species and that spawning peaks may occur twice in a cale ndar year. Growth rate derived from size-at-age information was best descri bed by a linear equation, with no difference between sexes.