两种小型海岸章鱼(小章鱼和斑尾章鱼)断臂频率的季节和性别差异。

IF 0.9 4区 生物学 Q3 ZOOLOGY
Yuta Yamate, Keijiro Haruki, Takumi Ohya, Toshifumi Wada, Takeshi Takegaki
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引用次数: 0

摘要

头足类动物作为各种类群捕食者的猎物,经常会失去手臂。章鱼腕足的丧失不仅可能是由于捕食压力,也可能是由于物种特有的生殖生态。因此,研究腕足丧失的发生可能为章鱼生殖生态的各个方面提供见解。本研究探讨了日本侏儒章鱼(octopus parvus)和日本蓝纹章鱼(Hapalochlaena cf. fasciata)两种小型章鱼腕部丧失的季节差异和性别差异。值得注意的是,与之前研究过的物种相比,O. parvus的手臂损失率更高,这可能是由于其相对较小的体型和与该物种共享潮间带栖息地的大型螃蟹的亚致命性捕食。在产卵季节,雄性和雌性的手臂损失都有增加的趋势,雄性的增加速度更快。雄性体型较小,由于与繁殖有关的雄性冲突和交配期间的性同类相食而失去手臂,可能是造成这一现象的原因。此外,失去手臂对卵子保留和保护措施的影响可能促使雌性采取将失去手臂风险降至最低的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seasonal and Sex Differences in Arm Loss Frequency in Two Small Coastal Octopus Species (Octopus parvus and Hapalochlaena cf. fasciata).

Cephalopods, as prey for predators of various taxa, frequently experience arm loss. Arm loss in octopods may arise not only from predation pressure but also species-specific reproductive ecology. Therefore, investigating the occurrence of arm loss may provide insights into various aspects of octopods' reproductive ecology. In this study, we explored the seasonal and sexual differences in arm loss occurrences in two small octopus species, the Japanese pygmy octopus, Octopus parvus, and the Japanese blue-lined octopus, Hapalochlaena cf. fasciata. Notably, O. parvus exhibited a higher arm loss rate compared with previously studied species, potentially attributable to its relatively small size and sublethal predation by large crabs sharing the species' intertidal habitat. Regarding H. cf. fasciata, arm loss in males and females tended to increase toward the spawning season, with males experiencing a more rapid increase. The smaller size of males and arm loss due to male-male conflict related to reproduction and sexual cannibalism during copulation are likely contributing factors. Additionally, the impact of arm loss on egg retention and protective measures may prompt females to adopt behaviors minimizing the risk of arm loss.

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来源期刊
Zoological Science
Zoological Science 生物-动物学
CiteScore
1.70
自引率
11.10%
发文量
59
审稿时长
1 months
期刊介绍: Zoological Science is published by the Zoological Society of Japan and devoted to publication of original articles, reviews and editorials that cover the broad field of zoology. The journal was founded in 1984 as a result of the consolidation of Zoological Magazine (1888–1983) and Annotationes Zoologicae Japonenses (1897–1983), the former official journals of the Zoological Society of Japan. Each annual volume consists of six regular issues, one every two months.
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