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稳定的同位素揭示了Cisco (Coregonus artedi) 中的热带本体发生

Benjamin E Martin¹, Joseph T Mrnak^2,3

¹Environmental Change Initiative, University of Notre Dame, Notre Dame, Indiana, USA.

Journal of fish biology

|July 12, 2024

概括

西斯科 (Coregonus artedi) 的大小影响其饮食和息地使用,显示了比以前假设的更大的热量变异性. 这项研究强调了避免对思科进行概括的必要性.

科学领域:

水生生态学水生生态学
渔业科学渔业科学
同位素生态学同位素生态学

背景情况:

西斯科 (Coregonus artedi) 是北美广泛分布的冷水鱼,通常被认为是有义务的动物植物食者.
然而,现有证据表明,它们的食物中存在潜在的变异性,这挑战了传统的观点.

研究的目的:

为了研究思科的身体大小和它们的热量位置之间的关系,一种被称为热量本体发生学的概念.
为了确定思科是否表现出饮食可塑性和基于大小的息地利用转移.

主要方法:

在威斯康星州特劳特湖Cisco肌肉组织中分析稳定同位素 (C和N).
测量Cisco的车身长度范围为127至271毫米 (n=66).
同位素数据与网捕捞数据的相关性,以评估息地使用情况.

主要成果:

N同位素分析揭示了热带性本体发生,较小的Cisco在热带水平为3,对于较大的个体增加到3.5.
¹³C同位素签名表明,在更大的Cisco中,饮食转向更多的海底资源.
观察到,较大的Cisco与较小的同类相比,利用了更深的水生息地.

结论:

西斯科显示出显著的营养变性,特别是在身体大小方面,这与"强制性浮游生物"的名称相反.
取决于大小的息地使用和饮食变化是思科生态作用的关键因素.
研究人员在将思科的热量功能及其对更广泛的食物网的影响概括时应谨慎.

关键词:

在CiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCiscoCisco 科雷戈努斯 (Coregonus artedi) 是一个艺术类植物.稳定的同位素是稳定的.trofhic ontogeny 热带性本体发生动物植被植物大多是动物植物.

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