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在道路上被杀害的胃部内容上的DNA元编码揭示了鱼饮食中存在的物种的广度

Kim A Hughes¹, Carol S Henger¹, Jason E Hawley²

¹Fordham University, Department of Biological Sciences, Bronx, New York, United States of America.

|March 13, 2026

概括

城市化影响掠食者的饮食. 对鱼 (Lynx rufus) 胃部内容的DNA元编码揭示了多样化的猎物,包括松鼠和鹿,但没有新英格兰棉尾,尽管它们很脆弱.

科学领域:

生态生态学生态生态学
野生动物生物学野生动物生物学
保护科学保护科学

背景情况:

城市化显著改变了生态动态,影响了捕食者与猎物的关系.
了解鱼 (Lynx rufus) 的饮食对于管理脆弱的猎物至关重要,例如新英格兰棉尾 (Sylvilagus transitionalis).
调查城市化地区的捕食者饮食存在挑战,因为像猫这样的物种难以捉摸的性质.

研究的目的:

分析美国康涅狄格州城市化景观中的鱼饮食变化.
为了确定猫是否会捕食临灭绝的新英格兰棉尾.
评估DNA元编码在研究捕食者饮食中的有效性.

主要方法:

使用DNA元编码对来自鱼路杀样本的胃部内容进行了分析.
测序猎物DNA以识别猫所食用的物种.
使用特定物种的标记物来确认新英格兰棉尾的存在.

主要成果:

鱼的饮食包括2-5种,有棉尾 (Sylvilagus spp.) 和东部灰松鼠 (Sciurus carolinensis) 在80%以上的样本中发现.
白尾鹿 (Odocoileus virginianus) 被近三分之一的猫吃掉.
没有发现新英格兰棉花食用的证据,尽管存在其他棉花物种.

结论:

DNA元编码是一种有效的方法,用于对像猫这样难以捉摸的捕食者的机会性饮食分析.
城市化的康涅狄格州的猫表现出多样化的饮食,包括半水生哺乳动物,但似乎不会捕食新英格兰棉尾.
这项研究提供了宝贵的见解,在人类改变的环境中,鱼的热带生态.

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