MEPS 551:277-281 (2016)  -  DOI: https://doi.org/10.3354/meps11776

NOTE
Male copulatory behavior interrupts Japanese flying squid Todarodes pacificus female spawning activity

Pandey Puneeta1,*, Dharmamony Vijai1,3, Jun Yamamoto2, Yasunori Sakurai1,4

1Department of Marine Bioresources and Ecology, School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate 041-8611, Japan
2Field Science Center for Northern Biosphere, Hokkaido University, Hakodate, Hokkaido 041-8611, Japan
3Present address: Oceanography Division, Tohoku National Fisheries Research Institute, 25-259 Shimo-mekurakubo, Samemachi, Hachinohe, Aomori 031-0841, Japan
4Present address: Hakodate Cephalopod Research Center, Fisheries and Oceans Hakodate, Benten-cho 20-5, Hakodate, Hokkaido 040-0051, Japan
*Corresponding author:

ABSTRACT: Batch spawning, intermittent spawning and multiple spawning represent common reproductive strategies among cephalopods. These flexible spawning strategies are also common in fishes, and are thought to be a female trait that is programmed depending on environmental parameters. The ommastrephid squid Todarodes pacificus, being a terminal spawner, is considered to have a single spawning event, extruding one large egg mass and dying soon thereafter. Females that are interrupted by males exhibiting mating behavior, while extruding the egg mass, spawn multiple egg masses over the course of 2-3 d instead of dying soon after spawning the first egg mass. We demonstrate that male mating behavior causes ‘forced’ intermittent spawning by females (i.e. more than one spawning event). We hypothesize that in T. pacificus, some males use this strategy to mate with females unable to repel advances while spawning, thus providing the male with the opportunity to contribute sperm and enhance gene flow.


KEY WORDS: Batch spawning · Spawning interruption · Multiple paternity · Egg mass · Oceanic squid


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Cite this article as: Puneeta P, Vijai D, Yamamoto J, Sakurai Y (2016) Male copulatory behavior interrupts Japanese flying squid Todarodes pacificus female spawning activity. Mar Ecol Prog Ser 551:277-281. https://doi.org/10.3354/meps11776

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