Abstract
Cladoceran hatching frequency can easily be calculated from observed egg age distribution and estimated egg development time. The large timelag errors of models incorporating birth rates in the equation are avoided, and the population growth rate can be estimated directly.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bottrell HH, Duncan A, Gliwicz ZM, Grygierek E, Herzig A, Hillbricht-Ilkowska A, Kurasawa H, Larsson P, Weglenska T (1976) A review of some problems in zooplankton production studies. Norw Journ Zool 24:419–456
Edmondson WT (1960) Reproductive rates of rotifers in natural populations. Mem Ist Ital Idrobiol 21:61–111
Edmondson WT (1968) A graphical model for evaluating the use of egg ratio for measuring birth and death rates. Oecologia (Berlin) 1:1–37
Edmondson WT (1972) Instantaneous birth rates of zooplankton. Limnol Oceanogr 17:792–795
Keen R, Nassar R (1981) Confidence intervals for birth and death rates estimated with the egg-ratio technique for natural populations of zooplankton. Limnol Oceanogr 26:131–142
Lynch M (1982) How well does the Edmondson-Paloheimo model approximate instantaneous birth rates? Ecology 63:12–18
Paloheimo JE (1974) Calculation of instantaneous birth rate. Limnol Oceanogr 19:692–694
Taylor BE, Slatkin M (1981) Estimating birth and death rates of zooplankton. Limnol Oceanogr 26:143–158
Threlkeld ST (1979) Estimating cladoceran birth rates: The importance of egg mortality and the egg age distribution. Limnol Oceanogr 24:601–612
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Johnsen, G. Egg age distribution, the direct way to cladoceran birth rates. Oecologia 60, 234–236 (1983). https://doi.org/10.1007/BF00379525
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00379525