氧气损失影响了新生的生长和认知能力
Melanie Court1, Marta Macau1, Maddalena Ranucci1
1MARE-Marine and Environmental Sciences Centre & ARNET-Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo, 939 , Cascais 2750-374, Portugal.
Proceedings. Biological sciences
|October 22, 2024
概括
海洋缺氧会对鱼的发育和行为产生负面影响. 不断扩大的低氧区通过降低息地适宜性和生存率来威胁鱼种群.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 动物行为 动物行为
背景情况:
- 海洋脱氧和缺氧正在全球范围内扩大,特别是在沿海地区.
- 关于缺氧对海洋物种发育和行为的具体影响的数据有限.
研究的目的:
- 研究不同程度的脱氧和缺氧对乌鱼 (Sepia officinalis) 发育,认知和行为的影响.
- 评估缺氧对化成功,生长,学习能力,伪装和鱼空间探索的影响.
主要方法:
- 乌暴露于正常氧,轻度缺氧 (夜间5毫克O2l-1),和严重的缺氧 (夜间2毫克O2l-1).
- 测量了发育参数 (化成功,发育时间,地幔长度),认知功能 (个人和社会学习) 和行为 (伪装,空间探索).
主要成果:
- 低氧暴露导致了较低的生存率,减少了身体尺寸 (长长度),并抑制了捕食和反捕食者的行为.
- 认知障碍包括无法在社会上学习和在新环境中增加活动,而thigmotaxis没有显著变化.
- 无论是急性还是慢性低氧暴露,都对鱼认知表现出类似的有害影响.
结论:
- 鱼对氧气限制有一定的耐受性,但扩大低氧区可能会降低息地的适宜性.
- 观察到的对发育和行为的影响表明,在未来的海洋条件下,鱼种群面临着重大挑战.
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