Abstract Invasive Creole Painted Crayfish (Orconectes palmeri) have spread throughout the Flint River and are currently moving from there into a tributary, Muckalee Creek. The negative behavioral impact of the invasive is a concern for the endemic Muckalee Crayfish (Procambarus gibbus). Tests examining residence, size, and cover effects on aggression demonstrated that O. palmeri is a dominant species in these encounters. This may explain the success of O. palmeri in the Flint River with Procambarus spiculifer, which is a close relative of P. gibbus, and it may also mean the endemic P. gibbus is in danger of extirpation. A survey of the Muckalee showed O. palmeri has already entered the tributary and are likely spreading upstream.

中文翻译：

---

入侵小龙虾 (Orconectes palmeri) 对 Muckalee 小龙虾 (Procambarus gibbus) 的对抗行为：居住、大小和覆盖的影响

摘要 侵入性克里奥尔彩绘小龙虾 (Orconectes palmeri) 已遍布整个弗林特河，目前正从那里迁移到一条支流穆卡利河。侵入性的负面行为影响是地方性 Muckalee Crayfish (Procambarus gibbus) 的一个问题。检查居住地、大小和覆盖对侵略的影响的测试表明 O. palmeri 是这些遭遇中的优势物种。这可能解释了 O. palmeri 在弗林特河中与 P. gibbus 的近亲 Procambarus spiculifer 成功的原因，也可能意味着地方性 P. gibbus 面临灭绝的危险。对 Muckalee 的一项调查显示 O. palmeri 已经进入支流并可能向上游扩散。