搭漂流海藻的便车降低了三疣梭子蟹幼体的捕食风险

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Satoshi Takeshima, Shigeki Dan, Katsuyuki Hamasaki
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引用次数: 0

摘要

据了解,三疣梭子蟹幼体在过渡到底栖栖息地之前会利用漂浮的海藻,这种行为被认为是一种躲避浅水捕食者的策略。然而,人们对三疣梭子蟹幼体在这种海藻中的捕食风险是否会降低知之甚少。为了评估漂浮海藻作为三疣梭子蟹躲避捕食的庇护所的育幼功能,我们进行了实地实验,比较被拴在模仿漂浮海藻的漂浮大型海藻上的第一至第五龄(即体型从小到大)幼体与被拴在无结构沙栖息地上的幼体的相对存活率。系留幼体在浮藻中的存活率高于在沙地中的存活率。这一点在一至三龄幼体中尤为明显,因为它们的埋藏行为较少。因此,体型较小、埋藏习惯较少的一至三龄幼体可能最容易被捕食,而漂浮的海藻可能起到育苗的作用,为它们提供躲避捕食者的庇护所。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Hitchhiking on drifting seaweed reduces predation risk in juveniles of the swimming crab Portunus tritberculatus

Hitchhiking on drifting seaweed reduces predation risk in juveniles of the swimming crab Portunus tritberculatus

Early juveniles of the swimming crab Portunus trituberculatus are known to use drifting seaweed before transitioning to benthic habitats in a behaviour that is thought to be a strategy to avoid shallow water predators. However, little is known about whether the predation risk of P. trituberculatus juveniles is reduced in such seaweed. To assess the nursery function of drifting seaweed for P. trituberculatus as a refuge from predation, we conducted field experiments to compare the relative survival of first to fifth instar (i.e. small to large body size) juveniles tethered to floating macroalgae that mimicked drifting seaweed and to unstructured sand habitats. The survival of tethered juveniles was higher in floating algae than in sand. This was particularly evident among first- to third-instar juveniles, which exhibited less burying behaviour. Thus, first- to third-instar juveniles with small body size and less burying habits are likely to be most vulnerable to predation, and drifting seaweed may function as a nursery vehicle, providing refuge from predators.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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