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Close-up observations on the spawning behavior of a captive Japanese flying squid (Todarodes pacificus)

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Title: Close-up observations on the spawning behavior of a captive Japanese flying squid (Todarodes pacificus)
Authors: Yamamoto, Jun Browse this author
Adachi, Kohsuke Browse this author
Bower, John R. Browse this author
Matsui, Hajime Browse this author
Nakaya, Mitsuhiro Browse this author
Ohtani, Ryusei Browse this author
Puneeta, Pandey Browse this author
Suzuki, Satoshi Browse this author
Tokioka, Shun Browse this author
Vijai, Dharmamony Browse this author
Yanagimoto, Takashi Browse this author
Yoo, Hae-Kyun Browse this author
Issue Date: 24-Dec-2019
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 9
Start Page: 19739
Publisher DOI: 10.1038/s41598-019-56071-0
Abstract: The spawning behavior of a Japanese flying squid (Todarodes pacificus) is described based on up-close observation of a captive female. The squid was first transferred from a 10-ton tank to a polystyrene plastic box containing 45 liters of seawater. About one hour later, the mantle-contraction rate increased rapidly, followed by a brief convulsion of the mantle and arms and a whitening of the body. The mantle contractions become shallow and rapid, and several seconds later, semitransparent jelly presumably from the nidamental glands emerged from the funnel and passed between the ventral pair of arms. Approximately 90 seconds after the egg mass first emerged, the female began ejecting oocytes through the funnel into the egg mass using rapid, powerful mantle contractions. Soon after the oocytes were ejected, translucent strands (presumably sperm) emanated from the buccal membrane. The female continued to eject oocytes for approximately two minutes, after which the mantle convulsed, and the mantle-contraction rate decreased slowly for about one minute until the contractions stopped. The squid died soon afterwards.
Type: article
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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