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具有不同掠食历史的猎物种群在急性掠食威胁下表现出行为和转录效应的差异

Veronica Rivi¹, Anuradha Batabyal², Cristina Benatti³

¹Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy.

Neurobiology of learning and memory

|June 1, 2023

概括

实验室培养的池牛 (W菌株) 天生就能识别捕食者的线索,升调血清素基因和压力反应,如CREB1和HSP70. 这导致了学会避免捕食者,与野生牛 (Margo菌株) 不一样.

科学领域:

行为生态学行为生态学
神经遗传学神经遗传学
动物行为动物行为

背景情况:

捕食者检测对于猎物的生存至关重要,触发行为和生理防御机制.
池的牛Lymnaea stagnalis表现出防御行为,以应对捕食者的线索.
天生的和学习的捕食者识别机制在种群之间有所不同.

研究的目的:

为了比较实验室内繁殖 (W菌株) 和野生捕获 (Margo菌株) 池牛之间的捕食者线索的转录和学习反应.
研究血清素,CREB1和HSP70在捕食者识别和学习中的作用.
为了确定牛是否形成已知的捕食者回避行为 (形象学习).

主要方法:

暴露W和Margo牛的鱼废水 (CE) 作为捕食者的提示.
使用转录分析量化mRNA水平的血清相关基因,CREB1和HSP70.
评估CE暴露后对配置学习记忆形成的反应.

主要成果:

在CE暴露后,W和Margo牛都显示了与血清素相关基因的mRNA水平增加.
只有W牛表现出CREB1和HSP70mRNA水平的上调.
W牛表现出配置式学习记忆,而Margo牛没有.

结论:

虽然这两种牛菌株都通过血清激素系统对捕食者线索具有基本的分子反应,但只有实验室内生育的W菌株表现出先天的威胁识别和随后的学会避免.
在W牛中,CREB1和HSP70的差异表达与它们的捕食者诱导的配置学习能力有关.
这项研究强调了遗传背景和环境历史对掠食者检测,应激反应和猎物动物学习的影响.

关键词:

在CREB1中,CREB1是指CREB1,CREB1是指CREB1,CREB1是指CREB1.配置式学习 (configural learning) 是一种学习方式.无脊椎动物是一种无脊椎动物.林梅 (Lymnaea stagnalis) 是一种常年停滞的植物.这是一种血清胺.

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