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Synergistic Effects of Different Food Species on Life-History Traits of Daphnia-Galeata

Boersma, M. and Vijverberg, J. (1995) Synergistic Effects of Different Food Species on Life-History Traits of Daphnia-Galeata. Hydrobiologia, 307, 109-115. ISSN 0018-8158.

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In this paper we describe the life history consequences of feeding Daphnia galeata with different food types in different concentrations. We fed the animals with four concentrations of two green algae Scenedesmus obliquus and Chlamydomonas globosa, given separately as well as in a 1:1 mixture. Growth, reproduction and condition of the animals and consequently the intrinsic rate of population increase, r, increased with the concentration of the food for all three experimental series. The life history parameters measured were lowest in the animals raised on C. globosa. Animals fed on S. obliquus showed higher values for r. We observed a distinct synergistic effect of the two algal species: growth, reproduction, condition and r were significantly higher for the animals raised on the mixed media as compared to the animals raised on the mono-algal media. We conclude that the two algal species represented complementary food resources. [KEYWORDS: Daphnia; food quality; life history; standard carbon content Population-growth; phytoplankton; quality; diet; temperature; limitation; copepod; culture; rates]

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:10305
Deposited On:25 Nov 2011 01:00
Last Modified:31 Mar 2014 10:10

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