On an Iteroparity of the Oval Squid Sepioteuthis lessoniana.

Wada, Yozo; Kobayashi, Tomokichi

doi:10.2331/suisan.61.151

Cited by 14 publications

(9 citation statements)

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“…This is also true for S. lessoniana caught from another location (e.g. Wada & Kobayashi (1995) reported that the number of hatchlings of captive S. lessoniana decreased (from 66.7 -97.8% to 22.7%, or from 77.1 -94.7% to 5.6%) after the removal of male squid from tanks where females were kept. Wada & Kobayashi (1995) revealed that the longer the duration between spawning bouts, the larger the number of ova spawned during each bout.…”

Section: Spawning Processmentioning

confidence: 72%

“…Table 2. Wada & Kobayashi (1995) first reported multiple spawning by an individual female S. lessoniana in captivity, and this has also been documented in other loliginid squids (e.g. reproduction and life span of oval squid populations of S. lessoniana; individuals born in the winter matured faster than individuals born in the summer (Jackson & Moltschaniwskyj, 2002).…”

Section: Maturation and Life Span: Captivity Versus Naturementioning

confidence: 75%

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

Ikeda

Ueta²,

Anderson

et al. 2009

Mar. Biodivers. Rec.

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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.

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Section: Spawning Processmentioning

confidence: 72%

Section: Maturation and Life Span: Captivity Versus Naturementioning

confidence: 75%

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

Ikeda

Ueta²,

Anderson

et al. 2009

Mar. Biodivers. Rec.

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“…Spawning occurs mainly during April to September around Japan's main islands and from January to October in Okinawa (Ueta, 2000). Captive females have been observed to make WORLD SQUID FISHERIES 161 multiple copulations and spawn 4-11 times during a spawning season (Wada 1993Wada andKobayashi, 1995). Egg capsules contain 1-9 eggs (mode D 5-6) and are attached to seaweed, eelgrass, corals and manmade spawning beds near the nearshore (Ueta, 2000).…”

Section: Stock Identificationmentioning

confidence: 99%

World Squid Fisheries

Arkhipkin¹,

Rodhouse²,

Pierce³

et al. 2015

Reviews in Fisheries Science & Aquaculture

263

143

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Artículo de publicación ISISome 290 species of squids comprise the order Teuthida that belongs to the molluscan Class Cephalopoda. Of these, about 30-40 squid species have substantial commercial importance around the world. Squid fisheries make a rather small contribution to world landings from capture fisheries relative to that of fish, but the proportion has increased steadily over the last decade, with some signs of recent leveling off. The present overview describes all substantial squid fisheries around the globe. The main ecological and biological features of exploited stocks, and key aspects of fisheries management are presented for each commercial species of squid worldwide. The history and fishing methods used in squid fisheries are also described. Special attention has been paid to interactions between squid fisheries and marine ecosystems including the effects of fishing gear, the role of squid in ecosystem change induced by overfishing on groundfish, and ecosystem-based fishery management

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“…This provides very strong field-based evidence of an extended spawning period for both male and female individuals, potentially constituting around 20 to 40% of their lifespan. Captive females of the closely related Sepioteuthis lessoniana may spawn over lengthy durations, with 1 female spawning 11 times over 6 wk at intervals of 1 to 9 d, laying 7780 eggs in total, at a temperature of 20 to 28°C (Wada & Kobayashi 1995). With the estimated lifespan of S. lessoniana around 6 mo (Jackson & Moltschaniwskyj 2002), this spawning period would also constitute ca.…”

Section: Discussionmentioning

confidence: 99%