期刊
ECOLOGY LETTERS
卷 24, 期 4, 页码 728-738出版社
WILEY
DOI: 10.1111/ele.13698
关键词
Ageing; allometric scaling; development; growth; life history trade‐ offs; longevity; phenotypic engineering; physiological regulation; reproductive allocation; sexual maturity
类别
资金
- NKFIH grant [FK 124164]
- European Union under the EFOP-3.6.1 project
- Thematic Excellence Programme of the Ministry for Innovation and Technology in Hungary [TKP2020-IKA-04]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
- UNKP New National Excellence Program of the Hungarian Ministry of Innovation and Technology [UNKP-19-4-DE-118]
Experimental manipulation of body size in the cnidarian Hydra oligactis revealed that smaller individuals can adjust their life history decisions based on their reduced size, leading to higher post-reproductive survival rates. This suggests that ecological or human-induced changes in body size can have immediate effects on life history and population dynamics.
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.
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