1994, English, Article, Journal or magazine article edition: Competitive exclusion in Cladocera through elevated mortality of adults. Matveev, Vladimir.; Gabriel, Wilfried.; Murray-Darling Freshwater Research Centre

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Bookmark: http://trove.nla.gov.au/version/246040531
Physical Description
  • journal article
  • 12 p. (p. 1083-1094)
Published
  • London : Oxford University Press,, 1994.
Language
  • English

Edition details

Title
  • Competitive exclusion in Cladocera through elevated mortality of adults.
Author
  • Matveev, Vladimir.
  • Gabriel, Wilfried.
  • Murray-Darling Freshwater Research Centre
Published
  • London : Oxford University Press,, 1994.
Physical Description
  • journal article
  • 12 p. (p. 1083-1094)
Part Of
  • Journal of plankton research, 16(9): 1083-1094
Subjects
Summary
  • MDFRC item.
  • The population dynamics of two cladocerans, Ceriodaphnia pulchella and Diaphanosoma brachyurum competing under laboratory conditions in lake water was analysed using cross-correlations. Both mixed and isolated populations of the two cladocerans showed delayed density-dependence in the death rates of juveniles and adults as well as in fecundity rate. The regressions for each of the three rates on total density of competitors were compared between the two species. There were no significant differences in the slopes of regressions for fecundity rates and the death rates of juveniles. However, in the inferior competitor (Diaphanosoma) which went extinct in all treatments, the death rate of adults increased with total density much more quickly than in the superior competitor (Ceriodaphnia). The intraspecific comparisons indicated that while Ceriodaphnia adults survived better than juveniles under conditions of crowding, in Diaphanosoma, juveniles were better survivors than adults. These data suggest that the contention of higher vulnerability of cladoceran juveniles than adults to starvation and crowding may prove to be not a universal phenomenon.
Language
  • English
Identifier
  • latrobe:32933

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