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暴露于入侵鱼类物种的本土小鱼的行为和生理动态

Marta Luiz¹, Filipe Banha¹, Gonçalo Brito¹

¹MARE - Marine and Environmental Sciences Centre, ARNET - Aquatic Research Network, Departamento de Paisagem, Ambiente e Ordenamento, Universidade de Évora, Évora, Portugal.

Physiology & behavior

|March 11, 2026

概括

像Gambusia holbrooki这样的侵入性鱼类显著改变了原生Squalius alburnoides的行为和神经化学,特别是在高密度下. 莱波米斯 (Lepomis gibbosus) 的影响较小,这表明它们对淡水生态系统的侵袭性影响较小.

科学领域:

生态生态学生态生态学
鱼类学鱼类学鱼类学
神经科学是一个神经科学.

背景情况:

侵入性外来物种对淡水生物多样性构成重大威胁.
地中海生态系统因季节性干旱而面临来自入侵鱼类的增加压力.
了解跨物种相互作用对于管理入侵物种影响至关重要.

研究的目的:

研究入侵鱼 (Gambusia holbrooki和Lepomis gibbosus) 对伊比利亚特有鱼 (Squalius alburnoides) 的行为和生理影响.
评估不同密度的入侵物种对本地鱼类反应的影响.
探索与入侵物种相互作用相关的神经化学变化.

主要方法:

在Squalius alburnoides对基线和高密度的Gambusia holbrooki和Lepomis gibbosus的实验暴露.
行为分析包括侵略,逃避和攻击率.
生理和神经化学评估,包括前脑多巴胺,5-HIAA,5-HT和血皮质醇水平.

主要成果:

甘布西亚holbrooki显著改变了S. alburnoides的行为 (增加侵略性,逃避) 并降低了基线密度的多巴胺水平.
在基线密度时,Lepomis gibbosus显示出最小的行为或生理影响.
两种入侵者的高密度加剧了相互作用;G.holbrooki引起了显著的神经化学变化 (增加了5-HIAA,改变了DOPAC/DA和5-HIAA/5-HT比率),同时两种入侵者降低了皮质醇水平.

结论:

侵入性鱼类对本地鱼类的行为和生理有不同的影响,G. holbrooki比L. gibbosus有更强的影响.
增加入侵者密度会放大这些特定物种的相互作用和应激反应.
研究结果强调了入侵物种在淡水生态系统中的复杂生态和神经生物学后果.

关键词:

这就是Lepomis gibbosus.攻击性侵略性攻击性皮质醇,甘布西亚霍尔布鲁基一种单氨基胺.人口密度人口密度.

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