幼虫蚊子大小的差异使生物控制剂能够准入侵物种
1Department of Life Sciences Imperial College London Ascot UK.
Ecology and evolution
|July 13, 2023
概括
旋形足虫Megacyclops viridis的捕食效率对入侵性Aedes albopictus幼虫的捕食效率高于本地Culex pipiens的捕食效率. 这一发现支持M. viridis作为英国Aedes albopictus的潜在生物控制剂.
科学领域:
- 生态生态学 生态生态学
- 昆虫学 昆虫学是一门学科.
- 气候变化生物学 气候变化生物学
背景情况:
- 全球气温上升有助于入侵物种的扩散,例如英格兰东南部的白虫.
- 本土的Culex pipiens是英格兰东南部的主导蚊子物种.
- 使用本地旋型足动物的生物控制策略可能会受到入侵性蚊子幼虫和本地蚊子幼虫之间的猎物偏好的影响.
研究的目的:
- 为了评估Megacyclops viridis在Aedes albopictus和Culex pipiens幼虫上的掠食效率.
- 评估温度对蚊子幼虫存活率和足动物捕食的影响.
- 为了确定是否copepod-to-prey大小比率预测掠食效率.
主要方法:
- 在15°C和25°C的温度下对Megacyclops viridis在Aedes albopictus和Culex pipiens幼虫上的捕食进行实验性评估.
- 在不同的温度条件下测量幼虫生存率,大小和背景死亡率.
- 统计建模以确定copepod掠食效率的预测因素,包括猎物大小和温度.
主要成果:
- 在混合猎物治疗中,Megacyclops viridis对Aedes albopictus幼虫的捕食效率明显高于Culex pipiens幼虫 (34.5%高).
- 在没有捕食者的对照中,Aedes albopictus幸存者比Culex pipiens幸存者小.
- 高温 (25°C) 增加了Culex pipiens幼虫的背景死亡率.
- 科佩波德体长与猎物平均长度的比率是捕食效率的重要预测因素.
结论:
- 巨型环球虫 (Megacyclops viridis) 显示出它更喜欢较小的白虫幼虫,而不是虫幼虫.
- 侵入性蚊子幼虫和本地蚊子幼虫之间的尺寸差异影响了足的捕食效率.
- 梅加cyclops viridis是一种有前途的生物控制剂,用于管理英国的入侵性白虫种群,即使在本地Culex pipiens的存在下也是如此.
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