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Production rates of Eurytemora affinis in the Elbe estuary, comparison of field and enclosure production estimates
Peitsch, A. (1995). Production rates of Eurytemora affinis in the Elbe estuary, comparison of field and enclosure production estimates. Hydrobiologia 311(1-3): 127-137
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158, more
Peer reviewed article  

Also published as
  • Peitsch, A. (1995). Production rates of Eurytemora affinis in the Elbe estuary, comparison of field and enclosure production estimates, in: Heip, C.H.R. et al. (Ed.) Major biological processes in European tidal estuaries. Developments in Hydrobiology, 110: pp. 127-137, more

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Keywords
    Body size; Chlorophylls; Comparative studies; Enclosures; Food availability; In situ measurements; Marine crustaceans; Secondary production; Eurytemora affinis (Poppe, 1880) [WoRMS]; ANE, Germany, Elbe Estuary [Marine Regions]; Marine

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  • Peitsch, A.

Abstract
    Production rates of the calanoid copepod Eurytemora affinis were estimated from field studies in the Elbe estuary and from an enclosure experiment. As one basic parameter of production rates, the body length, was compared between both investigations. Most of the copepodid stages in the enclosure experiment reached a significant greater length than the copepodids in the estuary. The differences in length between copepods from the field and the experiment could mainly be explained by a four times higher chlorophyll-a level in the enclosure experiment. The better food supply also results in a higher individual growth rate for all instars in the enclosure experiment. Therefore the population of Eurytemora affinis in the Elbe estuary was regarded as food limited during certain times of the year, especially in late spring and summer.
    Maximum daily production rate in the enclosure experiment (40 µg dw l–1 d–1) was four times higher than in the estuary (12 µg dw l–1 d–1). The mean daily P:B ratio in the enclosure was 0.301 d–1 compared to 0.11 d–1 in the estuary.

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