Experimental manipulation of body size alters life history in hydra,Ecology Letters

当前位置： X-MOL 学术 › Ecol. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Experimental manipulation of body size alters life history in hydra
Ecology Letters ( IF 7.6 ) Pub Date : 2021-02-19 , DOI: 10.1111/ele.13698
Kha Sach Ngo ₁ , Berta R‐Almási ₁ , Zoltán Barta ₁ , Jácint Tökölyi ₁

Affiliation

Body size has fundamental impacts on animal ecology and physiology but has been strongly influenced by recent climate change and human activities, such as size‐selective harvesting. Understanding the ecological and life history consequences of body size has proved difficult due to the inseparability of direct effects of body size from processes connected to it (such as growth rate and individual condition). Here, we used the cnidarian Hydra oligactis to directly manipulate body size and understand its causal effects on reproduction and senescence. We found that experimentally reducing size delayed sexual development and lowered fecundity, while post‐reproductive survival increased, implying that smaller individuals can physiologically detect their reduced size and adjust life history decisions to achieve higher survival. Our experiment suggests that ecological or human‐induced changes in body size will have immediate effects on life history and population dynamics through a growth‐independent link between body size, reproduction and senescence.

中文翻译：

实验性地改变身体大小改变了水肿的生活史

体型对动物生态和生理有根本影响，但受到近期气候变化和人类活动（例如体型选择收获）的强烈影响。由于与自身相关的过程（如生长速度和个体状况）对人体大小的直接影响是不可分割的，因此了解人体大小的生态和生活史后果已证明是困难的。在这里，我们使用了少刺蛇Hy直接操纵身体大小并了解其对生殖和衰老的因果关系。我们发现通过实验减小体型会延迟性发育并降低生殖力，而生殖后存活率会增加，这意味着较小的个体可以从生理角度检测到其体型减小，并调整生活史决定以实现更高的存活率。我们的实验表明，人体大小的生态或人为变化将通过体重，生殖和衰老之间的与生长无关的联系，对生活史和人口动态产生直接影响。

更新日期：2021-03-16

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11