Estimating Food Consumption by a Heavily Fished Stock of Zooplanktivorous Coregonus lavaretus

Eckmann, Reiner; Becker, Michael; Schmid, Myriam

Estimating Food Consumption by a Heavily Fished Stock of Zooplanktivorous Coregonus lavaretus

Dateien

Eckmann_etal_TAFS2002.pdfGröße: 112.54 KBDownloads: 426

Datum

2002

Autor:innen

Eckmann, Reiner

Becker, Michael

Schmid, Myriam

URI (zitierfähiger Link)

http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-38697

Link zur Lizenz

Attribution-NonCommercial-NoDerivs 2.0 Generic

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Beitrag zu einem Konferenzband

Publikationsstatus

Published

Erschienen in

Transactions of the American Fisheries Society. 2002, pp. 946-955

Zusammenfassung

The food consumption of adult zooplanktivorous Coregonus lavaretus in Lake Constance, Germany, was estimated monthly from May to October 1989 with a bioenergetics model. To achieve fine temporal resolution of lakewide consumption, we scaled the monthly weight increments of fish during the 6-month growing season by the relative weights of the stomach contents of fish sampled around sunset. As a result, the proportion of maximum consumption varied from month to month. When this proportion was held constant, the total consumption estimates were similar but the allocation of consumption to each month differed by up to 30% between the two scenarios. Bythotrephes longimanus was the most important prey item from June to October. The average daily consumption of B. longimanus amounted to 15.4% of the standing stock, while that of daphnids Daphnia spp. and Leptodora kindtii was more than an order of magnitude lower. We conclude that adult C. lavaretus in Lake Constance may control the population dynamics of B. longimanus but not those of other cladocerans.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Wisconsin bioenergetics, zooplankton, upper Lake Constance, food consumption, zooplanktivorous

Zitieren

ISO 690

ECKMANN, Reiner, Michael BECKER, Myriam SCHMID, 2002. Estimating Food Consumption by a Heavily Fished Stock of Zooplanktivorous Coregonus lavaretus. In: Transactions of the American Fisheries Society. 2002, pp. 946-955

BibTex

@inproceedings{Eckmann2002Estim-8781,
  year={2002},
  title={Estimating Food Consumption by a Heavily Fished Stock of Zooplanktivorous Coregonus lavaretus},
  booktitle={Transactions of the American Fisheries Society},
  pages={946--955},
  author={Eckmann, Reiner and Becker, Michael and Schmid, Myriam}
}

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Universitätsbibliographie

Ja