Predation on Horsehair Worms (Phylum Nematomorpha)
作者:
PhilipA. Cochran,
AndrewP. Kinziger,
WilliamJ. Poly,
期刊:
Journal of Freshwater Ecology
(Taylor Available online 1999)
卷期:
Volume 14,
issue 2
页码: 211-218
ISSN:0270-5060
年代: 1999
DOI:10.1080/02705060.1999.9663672
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Field observations revealed cases of predation on horsehair worms by brown trout (Salmo trutta) in Maryland and Minnesota, a rock bass (Ambloplites rupestris) in Kentucky, and a crayfish in Wisconsin. Some fish contained more than one worm and may have consumed reproductive aggregations. In laboratory feeding trials withGordius robustus, most individuals of several fish species either ignored the horsehair worms or rejected them after taking them into their mouths briefly, but a green sunfish (Lepomis cyanellus) consumed both individual worms and a compact ball of 18 worms. A literature review yielded cases of predation on horsehair worms by at least 12 fish species. Horsehair worms usually were only a trace component of the diet, but some individual fish had eaten multiple worms.
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