Male copulatory behavior interrupts Japanese flying squid Todarodes pacificus female spawning activity
Male copulatory behavior interrupts Japanese flying squid Todarodes pacificus female spawning activity
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DOI：
10.3354/meps011776
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发表时间：
2016-06-09
影响因子：
2.5
通讯作者：
Sakurai, Yasunori
中科院分区：
文献类型：
--
作者：
Puneeta, Pandey;Vijai, Dharmamony;Sakurai, Yasunori
批量产卵、间歇产卵和多次产卵是头足类常见的繁殖策略。这些灵活的产卵策略在鱼类中也很常见，被认为是一种雌性特征，取决于环境参数。太平洋柔鱼（Todarodes pacificus）是一种终端产卵者，被认为只有一次产卵，排出一个大的卵团，然后很快死亡。雌性被雄性打断，表现出交配行为，同时挤出卵块，在2-3天的过程中产生多个卵块，而不是在产生第一个卵块后不久死亡。我们表明，男性交配行为的原因“被迫”间歇性产卵的女性（即不止一个产卵事件）。我们假设T.对于太平洋鱼类，一些雄性利用这种策略与产卵时无法抗拒的雌性交配，从而为雄性提供贡献精子和增强基因流动的机会。
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.