publication . Article . 1987

Cladoceran birth and death rates estimates: experimental comparisons of egg-ratio methods

Wilfried Gabriel; Barbara E. Taylor; Susanne Kirsch-Prokosch;
Open Access
  • Published: 01 Jan 1987 Journal: Freshwater Biology, volume 18, pages 361-372 (issn: 0046-5070, eissn: 1365-2427, Copyright policy)
  • Publisher: Wiley
  • Country: Germany
SUMMARY. I. Birth and death rates of natural cladoceran populations cannot be measured directly. Estimates of these population parameters must be calculated using methods that make assumptions about the form of population growth. These methods generally assume that the population has a stable age distribution. 2. To assess the effect of variable age distributions, we tested six egg ratio methods for estimating birth and death rates with data from thirty-seven laboratory populations of Daphnia pulicaria. The populations were grown under constant conditions, but the initial age distributions and egg ratios of the populations varied. Actual death rates were virtual...
Persistent Identifiers
free text keywords: Aquatic Science, Biologie, Population growth, Biology, Birth–death process, Statistics, Sampling interval, Mortality rate, Population structure, Stable distribution, Sampling (statistics), Ecology, Population, education.field_of_study, education, ddc:570
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