KNAW Repository

More than one `fish kairomone'? Perch and stickleback kairomones affect Daphnia life history traits differently

Weber, A. (2003) More than one `fish kairomone'? Perch and stickleback kairomones affect Daphnia life history traits differently. Hydrobiologia, 498, 143-150. ISSN 0018-8158.

[img]PDF - Published Version
Restricted to KNAW only

272Kb

Official URL: http://dx.doi.org/10.1023/A:1026297106626

Abstract

Life history traits of Daphnia galeata clones were affected differently by kairomones exuded by two species of fish. The exposure to Gasterosteus kairomone resulted in an increase in population intrinsic rate of increase and body growth rate relative to the exposure to Perca kairomone. These differences between fish treatments have not been reported earlier. The results suggest differences between fish kairomones that are not due to concentration effects alone. This raises the possibility that kairomones are cocktails of chemicals rather than a single `fish substance'. It also supports the view the effects of size-selective predation vary depending on the local predator–prey assemblage examined. This finding leads to an additional, previously underestimated but potentially complex aspect in zooplankton ecology [KEYWORDS: Perca fluviatilis, Gasterosteus aculeatus, chemical communication, predation threat]

Item Type:Article
ID Code:11435
Deposited On:24 Nov 2011 01:00
Last Modified:24 Apr 2012 16:34

Repository Staff Only: item control page