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JOURNAL OF PLANKTON RESEARCH | VOLUME 19 | NUMBER 9 | PAGES 1331-1346 | 1997
© Oxford University Press
research-article |
Food- and temperature-dependent function of moulting rate in copepods: An example of parameterization for population dynamics models
Université Pierre et Marie Curie (Paris VI), Laboratoire d'Océanographie Biologique et Ecologie du Plancton Marin CNRS-URA. 2077-Station Zoologique, BP28, F-06230 Villefranche-sur-mer, France
Received on July 20, 1996; accepted on May 15, 1997 The effects of temperature and food concentration on moulting rates in copepods were studied. The distribution of transfer rates in different stages of Euterpina acuhfrons in different temperature and food concentrations were simulated using a process model. These distributions were fitted by an appropriate asymmetrical probability distribution: the gamma density function (GDF). A parameterization of moulting rates established a continuous relationship between parameters of GDF, and the two external factors, temperature and food concentration. This function can also represent the frequency distribution of successive developmental stages in a cohort. Two examples of such representation are given, using literature data.
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