Journal Article

Resistance variation within a <i>Daphnia pulex</i> population against toxic cyanobacteria

Xiaodong Jiang, Lihua Zhang, Huishuang Liang, Qingmei Li, Yunlong Zhao, Liqiao Chen, Wei Yang and Shiye Zhao

in Journal of Plankton Research

Volume 35, issue 5, pages 1177-1181
Published in print September 2013 | ISSN: 0142-7873
Published online June 2013 | e-ISSN: 1464-3774 | DOI:

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  • Marine and Estuarine Biology
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Thirteen sympatric Daphnia pulex clones differed significantly in fitness when fed Chlorella pyrenoidosa and toxic Microcystis aeruginosa. The least susceptible clone was 12 times less susceptible to M. aeruginosa than the most susceptible clone. The correlations of D. pulex resistance with the slope and the mean of fitness reaction norms imply that both an increase in fitness for two diets and a reduced phenotypic plasticity contributed to the evolution of resistance to M. aeruginosa.

Keywords: Daphnia pulex; resistance; clonal variation; phenotypic plasticity; cyanobacteria; zooplankton

Journal Article.  2064 words.  Illustrated.

Subjects: Marine and Estuarine Biology ; Zoology and Animal Sciences