Moriwaki Yuu, Kusama Satoshi, Yamane Anri, Nur E Alam Md, Sato Noriyosi, Hirohashi Noritaka
Faculty of Life and Environmental Science, Shimane University, Matsue, Shimane, Japan.
Uozu Aquarium, Uozu, Toyama, Japan.
MicroPubl Biol. 2025 Jan 8;2025. doi: 10.17912/micropub.biology.001424. eCollection 2025.
Although cephalopods are primarily polyandrous, genetic evidence revealed rare monogamy in . Here, we studied the sister species . We found that copulation began in early July, with egg spawning occurring in early August. The sex ratio was female-biased until late August, then shifted to male-biased. After early August, the average number of sperm sacs in females exceeded that of males. As the season progresses, females began storing sperm sacs in a cryptic sperm pocket on the right lateral trunk within the mantle. This behavior is associated with male-biased sex ratio. These results suggest polyandry in
虽然头足类动物主要是多配偶制，但基因证据显示 中存在罕见的单配偶制。在此，我们研究了姐妹物种 。我们发现交配始于7月初，产卵发生在8月初。直到8月底，性别比例一直偏向雌性，然后转为偏向雄性。8月初之后，雌性体内精子囊的平均数量超过了雄性。随着季节的推进，雌性开始将精子囊储存在外套膜内右侧躯干上一个隐秘的精子囊中。这种行为与雄性偏向的性别比例有关。这些结果表明 中存在多配偶制
