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Spawning pattern of the neon flying squid Ommastrephes bartramii (Cephalopoda: Oegopsida) around the Hawaiian Islands

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タイトル: Spawning pattern of the neon flying squid Ommastrephes bartramii (Cephalopoda: Oegopsida) around the Hawaiian Islands
著者: Vijai, Dharmamony 著作を一覧する
Sakai, Mitsuo 著作を一覧する
Kamei, Yoshihiko 著作を一覧する
Sakurai, Yasunori 著作を一覧する
キーワード: North Pacific
squid
Ommastrephes bartramii
reproductive strategy
spawning pattern
発行日: 2014年12月
出版者: Consejo Superior de Investigaciones Científicas (CSIC)
誌名: Scientia marina
巻: 78
号: 4
開始ページ: 511
終了ページ: 519
出版社 DOI: 10.3989/scimar.04112.27B
抄録: The neon flying squid, Ommastrephes bartramii, is an oceanic squid species that is widely distributed in the North Pacific, with the winter-spring cohort spawning around the Hawaiian Islands. Here, we investigated the spawning characteristics of O. bartramii by analyzing various reproductive parameters of individuals (622 males, 108 females) collected in this region. Female spawning status was determined from the somatic indices and histological characteristics of the ovaries. At all developmental stages, the ovaries of spawned females contained oocytes, and oviduct fullness was not correlated with body size. Thus, because the eggs mature asynchronously, with multiple filling and evacuation events, this species is considered an intermittent spawner. Mature males with developed accessory glands were also present within the distribution range of healthy spawned females, indicating that mating occurs between spawning events. Our data indicate that the first spawning event occurs at a mantle length of similar to 520-540 mm for Hawaiian O. bartramii. Subsequently, the squid forage and grow, and refill the oviducts, before the second spawning event occurs.
資料タイプ: article
URI: http://hdl.handle.net/2115/57813
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 桜井 泰憲

 

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