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Population dynamics and production of Daphnia hyalina Leydig and Daphnia cucullata Sars in Tjeukemeer by J. Vijverberg; A. F. Richter is a Environmental Science article available to read on EtoBox.

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As part of a research programme on the food chains in Tjeukemeer, the Daphnia hyalina and Daphnia cucullata populations were studied for three successive years . To analyse the factors regulating the production of these two species, their population parameters density, size distribution, fecundity) and population dynamics birth rate, mortality rate) were studied and related to environmental factors . Since Daphnia in Tjeukemeer shows continuous recruitment, the population dynamics model 'INSTAR' was developed and used to integrate field data with laboratory data on development rates and length-weight relationships . The dynamics of the Daphnia species are mainly regulated by temperature and fish predation, the latter affects both birth rate and mortality . Total annual Daphnia production was 3 .1-6.9 g org . dry wt m-2 , and annual P/ B ratio ranged from 25 to 40 for D . cucullata and from 45 to 49 for D . hyalina.

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Author

J. Vijverberg; A. F. Richter

Publisher

Springer; Springer-Verlag; Springer (Kluwer Academic Publishers); Kluwer Academic Publishers; Springer Science and Business Media LLC (ISSN 1573-5141)

Published

1982

Language

EN

Field

Environmental Science (Physical Sciences)