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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. https://dx.doi.org/10.1007/BF00008576 In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer Is gerelateerd aan: 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. Major biological processes in European tidal estuaries. Developments in Hydrobiology, 110: pp. 127-137, meer

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Beschikbaar in	Auteur
VLIZ [ aanvragen ]

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Trefwoorden

ANE, Germany, Elbe Estuary Availability > Food availability Biological production > Secondary production Body size Comparative studies Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine crustaceans In situ measurements Organic compounds > Carbohydrates > Glycosides > Pigments > Photosynthetic pigments > Chlorophylls Structures > Hydraulic structures > Barrages > Enclosures Eurytemora affinis (Poppe, 1880) [WoRMS] Elbe Estuarium [Marine Regions] Marien/Kust

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Auteur		Top
Peitsch, A.

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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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