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Reproduction and life span of the oval squid Sepioteuthis lessoniana (Cephalopoda: Loliginidae): comparison between laboratory-cultured and wild-caught squid

Published online by Cambridge University Press:  10 March 2009

Y. Ikeda ,
Y. Ueta ,
F.E. Anderson  and
G. Matsumoto
Y. Ikeda*
Affiliation:
Department of Chemistry, Biology and Marine Science, University of the Ryukyus, Okinawa 903-0213, Japan
Y. Ueta
Affiliation:
Fisheries Research Institute, Tokushima Agriculture, Forestry and Fisheries Technology Support Center, Tokushima 779-2304, Japan
F.E. Anderson
Affiliation:
Department of Zoology, Southern Illinois University, Carbondale, IL 62901, USA
G. Matsumoto
Affiliation:
Deceased
*
Correspondence should be addressed to: Y. Ikeda, Department of Chemistry, Biology and Marine Science, University of the Ryukyus, Okinawa 903-0213, Japan email: ikeda@sci.u-ryukyu.ac.jp
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Abstract

Three consecutive generations of the oval squid, Sepioteuthis lessoniana, were cultured between October 2000 and May 2002 to investigate the life history of this species. Starting with the parental generation (wild-caught sub-adult squid from Tokushima Prefecture, Japan), we successfully obtained first and second generations. Life span and maturation of cultured oval squid and wild oval squid caught from the same habitat during April 2001 through to March 2002 were compared. Captive squid matured earlier and had a shorter life span (189–247 days) than the wild-caught squid (approximately one year) but reached an equivalent final body size. More ova were found in the oviducts of cultured females than in the oviducts of wild-caught females. Ultimately, collapse of the culture population was mainly due to the low rate of embryonic development of spawned ova, which might have resulted from the abnormal arrangement of ova in egg cases produced by later generations of females.

Keywords

reproductionlife spanoval squidcomparisonlaboratory-cultured squidwild-caught squid
Type
Research Article
Information
Marine Biodiversity Records , Volume 2 , January 2009 , e50
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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