Life history responses of the cladoceran Ceriodaphnia cf. dubia to variation in food concentration

R. M. Rose, M. St J. Warne, R. P. Lim

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The effect of five different food concentrations on the life history of Ceriodaphnia cf. dubia was examined by following cohorts of 25 individuals from <24 hours until the death of all individuals. The food concentrations used in the study were chosen to reflect densities found in lentic freshwater systems and those commonly used in toxicity testing, and ranged from 1 x 104 cells mL-1 to 15 x 104 cells mL-1. Food concentration was found to have a significant effect (p<0.05) on several life history parameters, with a decrease in food concentration leading to a decrease in brood sizes and population growth rate, and an increase in longevity. Population growth rates varied from approximately 0.39 neonates d-1 to 0.54 neonates d-1, while mean lifespan ranged from 16.7 days to 42.9 days. A decrease in food concentration also led to an increase in the mean generation time.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalHydrobiologia
Volume427
Issue number1-3
DOIs
Publication statusPublished - 1 Jun 2000
Externally publishedYes

Keywords

  • Ceriodaphnia cf. dubia
  • Food concentration
  • Life history
  • Longevity
  • Population growth rate
  • Reproduction

ASJC Scopus subject areas

  • Aquatic Science

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