Non-visual feeding behavior of the mottled sculpin,Cottus bairdi,in Lake Michigan |
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Authors: | Denise Hoekstra John Janssen |
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Institution: | (1) Biology Department, Loyola University, 6525 North Sheridan Road, Chicago, IL 60626, USA |
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Abstract: | Synopsis Field and laboratory experiments indicate that the mottled sculpin, Cottus bairdi, feed in the dark. Blinded sculpins feed on a variety of motile prey in the laboratory and show stereotyped responses to
prey stimuli. The sculpins bite at moving inert objects, even if buried in substratum, indicating that they use their lateral
line system to detect prey. Covering portions of the lateral line with an inert paste eliminates response to objects near
the covered region of the lateral line. The sculpins can also detect prey (including inert objects) in a stream if the prey
is upstream. Collection from two series of presunset, postsunset, presunrise, postsunrise, dives in Lake Michigan indicate
nocturnal feeding by the mottled sculpin. |
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Keywords: | Benthos Ecology Feeding periodicity Great Lakes Lateral line Mechanoreception Predation |
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