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JOURNAL OF PLANKTON RESEARCH | VOLUME 18 | NUMBER 6 | PAGES 1055-1061 | 1996
© Oxford University Press

other

Spines of Daphnia lumholtzi create feeding difficulties for juvenile bluegill sunfish (Lepomis macrochirus)

Steve M. Swaffar and W.John O'Brien1

Department of Systematics and Ecology, University of Kansas Lawrence, KS 66045-2106, USA

1To whom correspondence should be addressed

Received on November 12, 1995; accepted on January 16, 1996 Juvenile bluegill sunfish were fed either adult Daphnia lumholtzi or similar sized Daphnia magna. The number of Daphnia eaten and the number rejected were counted for three fish size classes (20–35 mm). Bluegill (26–35 mm) rejected more D.lumholtzi than similar sized D.magna. All size classes of fish ate fewer D.lumholtzi than D.magna. The spines of D.lumholtzi presented greater ingestion difficulties to the smallest bluegill.


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A. R. Dzialowski, W.J. O'Brien, and S. M. Swaffar
Range expansion and potential dispersal mechanisms of the exotic cladoceran Daphnia lumholtzi
J. Plankton Res., December 1, 2000; 22(12): 2205 - 2223.
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