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Daphnia Pre‐Exposed to Toxic Microcystis Exhibit Feeding Selectivity
Author(s) -
Tillmanns Angeline R.,
Burton Sara K.,
Pick Frances R.
Publication year - 2011
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.201011298
Subject(s) - daphnia , cyanobacteria , microcystis aeruginosa , microcystis , biology , chlorella , strain (injury) , botany , dominance (genetics) , microcystin , algae , microbiology and biotechnology , ecology , crustacean , bacteria , biochemistry , anatomy , genetics , gene
In this study, short term feeding experiments were used to determine if Daphnia , pre‐exposed to cyanobacteria, could avoid cyanobacteria through feeding selectively. The results show that Daphnia ambigua were capable of altering the proportion of a single – celled cyanobacterium ( Microcystis aeruginosa ) to a chlorophyte ( Chlorella kessleri ) of similar size and shape. Also, D. ambigua pre‐exposed for eight weeks to a toxic strain of M. aeruginosa were more successful at avoiding this strain than D. ambigua pre‐exposed to C. kessleri or to a non‐toxic strain of M. aeruginosa . These experimental results suggest that further investigations of Daphnia 's ability to influence the dominance of cyanobacterial strains in lakes are warranted. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)