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Diel feeding periodicity of Ephemera simulans nymphs in summer and winter

Journal of Freshwater Ecology

By:
, , and
DOI: 10.1080/02705060.2012.659221

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Abstract

We examined diel feeding periodicity of Ephemera simulans nymphs during summer and winter in a third-order stream in central New York. A total of 245 nymphs were collected at 4-h intervals over two 24 h periods and were immediately preserved in 80% ethanol. In the laboratory, we weighed each nymph and its digestive tract. The ratio of wet weight of the digestive tract to the total body weight at each 4-h interval was used to determine feeding periodicity. Diel feeding periodicity followed a similar pattern in summer and winter and was significantly higher at 08:00 hours. Feeding periodicity of E. simulans in Labrador Creek is asynchronous with the two most abundant fish species in the stream and may reflect predator avoidance behavior that has been shown for other mayfly species.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Diel feeding periodicity of Ephemera simulans nymphs in summer and winter
Series title:
Journal of Freshwater Ecology
DOI:
10.1080/02705060.2012.659221
Volume
27
Issue:
2
Year Published:
2012
Language:
English
Publisher:
Taylor & Francis Group
Publisher location:
London, UK
Contributing office(s):
Great Lakes Science Center
Description:
4 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Freshwater Ecology
First page:
305
Last page:
308
Country:
United States
State:
New York
Other Geospatial:
Labrador Creek