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The endocrine basis of phenotypic plasticity in a predator-prey system.

捕食者-被捕食系统中表型可塑性的内分泌基础。

基本信息

批准号：
NE/D012244/1
负责人：
Andrew Beckerman
金额：
$ 40.55万
依托单位：
University of Sheffield
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FD012244%2F1
关键词：
endocrine basis phenotypic plasticity predator

项目摘要

Why are there so many patterns in colouration, morphology, life history and behaviour within a particular species? Recently, developmental biologists and ecologists have begun to join forces to answer this question in the field of ecological developmental biology (ECO-DEVO). They are asking how phenotypic plasticity (the variation in colour, morphology etc.) emerges from the interplay between a changing environment and the physiological machinery that regulates an organisms development. From an ecological standpoint, identifying the developmental basis of phenotypic plasticity is the identification of the mechanism giving rise to the variation we see in organisms behaviour, morphology and life history. From an evolutionary perspective, this developmental definition brings the study of phenotypic plasticity closer to the molecular and physiological basis of development, which is emerging as the foundation of evolutionary research. Here, I propose to investigate the developmental (e.g. hormonal) basis of inducible defences in a classic water-flea (Daphnia pulex) - phantom midge (Chaoborous spp.) predator-prey system. In this system, predator based chemical signals induce striking adaptive morphological and life history defences in the prey. These include protuberances and spikes on juvenile heads and delayed maturity at a larger size - fundamental, sub-lethal shifts in morphology and development that confer increased survival. The interplay between invertebrate hormones such as ecdysteroids, juvenile hormone and other peptides is known to regulate just these types of developmental changes: the moult cycle and the timing of and variation in morphology, growth and development. The proposed research will test the hypothesis that the chemical signal that predators do emit actually triggers an adaptive shift in the endocrine system, leading to adaptive changes in prey growth and development. This research aims to a) identify the hormones and peptides that underpin the induction of these adaptive, developmental changes; b) identify predator induced change in the time sequence of hormone concentration; and c) test among four hypothesis for the developmental control of the induced phenotype.

为什么在一个特定的物种中有如此多的颜色、形态、生活史和行为模式？最近，发育生物学家和生态学家开始联手在生态发育生物学（ECO-DEVO）领域回答这个问题。他们问的是表型可塑性（颜色，形态等的变化）从变化的环境和调节生物体发育的生理机制之间的相互作用中产生。从生态学的角度来看，确定表型可塑性的发展基础就是确定我们在生物体行为，形态和生活史中看到的引起变化的机制。从进化的角度来看，这种发育定义使表型可塑性的研究更接近于发育的分子和生理基础，这是进化研究的基础。在这里，我建议调查的发展（如激素）诱导防御的基础上，在一个经典的水蚤（蚤）-幻影蠓（Chaoborous spp.）捕食-被捕食系统在这个系统中，捕食者为基础的化学信号诱导惊人的适应性形态和生活史的猎物防御。这些包括幼年头上的突起和尖刺，以及较大尺寸的延迟成熟--形态和发育的基本、亚致死性变化，从而提高了生存率。已知无脊椎动物激素如蜕皮激素、保幼激素和其他肽之间的相互作用仅调节这些类型的发育变化：蜕皮周期和形态、生长和发育的时间和变化。拟议的研究将测试这样的假设：捕食者确实发出的化学信号实际上会引发内分泌系统的适应性转变，从而导致猎物生长和发育的适应性变化。本研究的目的是：a）确定激素和肽的诱导这些适应性，发育的变化; B）确定捕食者诱导的激素浓度的时间序列的变化;和c）测试之间的四个假说的诱导表型的发育控制。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Endocrine regulation of predator-induced phenotypic plasticity.

DOI：
10.1007/s00442-014-3102-8
发表时间：
2014-11
期刊：
OECOLOGIA
影响因子：
2.7
作者：
Dennis, Stuart R.;LeBlanc, Gerald A.;Beckerman, Andrew P.
通讯作者：
Beckerman, Andrew P.

Can invasions occur without change? A comparison of G-matrices and selection in the peach-potato aphid, Myzus persicae.

DOI：
10.1002/ece3.883
发表时间：
2013-12
期刊：
ECOLOGY AND EVOLUTION
影响因子：
2.6
作者：
Bacigalupe, Leonardo D.;Barrientos, Karin;Beckerman, Andrew P.;Carter, Mauricio J.;Figueroa, Christian C.;Foster, Stephen P.;Moore, Allen J.;Silva, Andrea X.;Nespolo, Roberto F.
通讯作者：
Nespolo, Roberto F.

A shared mechanism of defense against predators and parasites: chitin regulation and its implications for life-history theory.