海洋变暖对珊瑚礁的影响 鱼类学习和记忆
Mayara M Silveira1, Jennifer M Donelson2, Mark I McCormick3
1Department of Physiology and Behavior, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
PeerJ
|August 14, 2023
概括
海洋温度上升会影响女鱼的学习和记忆. 这项研究表明,热应激对在不断变暖的海洋环境中生存至关重要的认知功能产生负面影响.
科学领域:
- 海洋生物学 海洋生物学
- 气候变化 生态学 生态学
- 动物认知 动物认知
背景情况:
- 热带外热生物,特别是珊瑚礁鱼类,容易受到海洋变暖的影响.
- 现有的关于珊瑚礁鱼体热敏感性的研究往往忽视了认知功能,影响了生存和决策.
研究的目的:
- 研究水温升高对女鱼种*Acanthochromis polyacanthus*的学习和记忆的影响.
- 评估不同程度的变暖如何影响认知表现和记忆保留.
主要方法:
- 暴露 * Acanthochromis polyacanthus * 在三个温度条件下:控制 (28-28.5°C),中等升温 (30-30.5°C) 和高升温 (31.5-32°C) 两周.
- 训练鱼类将视觉提示 (蓝色标签) 与社会奖励 (特定存在) 相联系起来.
- 在训练和五天间隔后测试关联式学习和记忆存储.
主要成果:
- 对照组的鱼类表现出成功的学习和记忆保留.
- 水温升高显著影响了学习能力和长期记忆储存.
- 较高的温度导致关联性任务的认知表现下降.
结论:
- 海洋变暖对珊瑚礁鱼类的学习和记忆等关键认知能力产生负面影响.
- 由于热应激导致的认知障碍对海洋物种的生存和决策构成重大威胁.
- 了解物种对变暖的具体反应对于预测未来的社区动态和识别脆弱物种至关重要.
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