caa a22 4500 397550588 CHVBK 20180308164749.0 cr unu---uuuuu 161202e199602 xx s 000 0 eng 10.1006/jmsc.1996.0010 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0010 Predation rates by North Sea cod (Gadus morhua) - predictions from models on gastric evacuation and bioenergetics [Elektronische Daten] [S. Hansson, L. G. Rudstam, J. F. Kitchell, P. E. Peppard, M. Hildén, B. L. Johnson] We compared four different methods for estimating predation rates by North Sea cod (Gadus morhua). Three estimates, based on gastric evacuation rates, came from an ICES multispecies working group and the fourth from a bioenergetics model. The bioenergetics model was developed from a review of literature on cod physiology. The three gastric evacuation rate models produced very different prey consumption estimates for small (<0.5 kg) and large (>2 kg) fish. For most size and age classes, the bioenergetics model predicted food consumption rates intermediate to those predicted by the gastric evacuation models. Using the standard ICES model and the average population abundance and age structure for 1974-1989, annual prey consumption by the North Sea cod population (age ≥1) was 840 kilotons. The other two evacuation rate models produced estimates of 1020 and 1640 kilotons, respectively. The bioenergetics model estimate was 1420 kilotons. The major differences between models were due to consumption rate estimates for younger age groups of cod. © 1996 International council for the Exploration of the Sea Articles nationallicence cod nationallicence Gadus morhua nationallicence North Sea nationallicence food consumption nationallicence predation nationallicence bioenergetics nationallicence Hansson S. Department of Systems Ecology and Center for Marine Research, Stockholm University S-106 91, Stockholm, Sweden aut Rudstam L. G. Cornell University Biological Field Station, Department of Natural Resources 900 Shackelton Point Road, Bridgeport, NY 13030-9750, U.S.A aut Kitchell J. F. Center for Limnology, University of Wisconsin Madison, WI 53706, U.S.A aut Peppard P. E. Center for Limnology, University of Wisconsin Madison, WI 53706, U.S.A aut Hildén M. National Board of Waters and the Environment PO Box 250, SF-00101 Helsinki, Finland aut Johnson B. L. National Biological Service, Upper Mississippi Science Center 2630 Fanta Reed Road, Post Office Box 818, LaCross, WI 54601-0818, U.S.A aut ICES Journal of Marine Science Oxford University Press 53/1(1996-02), 107-114 1054-3139 53:1<107 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0010 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0010 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hansson S. Department of Systems Ecology and Center for Marine Research, Stockholm University S-106 91, Stockholm, Sweden aut NATIONALLICENCE 700 1- Rudstam L. G. Cornell University Biological Field Station, Department of Natural Resources 900 Shackelton Point Road, Bridgeport, NY 13030-9750, U.S.A aut NATIONALLICENCE 700 1- Kitchell J. F. Center for Limnology, University of Wisconsin Madison, WI 53706, U.S.A aut NATIONALLICENCE 700 1- Peppard P. E. Center for Limnology, University of Wisconsin Madison, WI 53706, U.S.A aut NATIONALLICENCE 700 1- Hildén M. National Board of Waters and the Environment PO Box 250, SF-00101 Helsinki, Finland aut NATIONALLICENCE 700 1- Johnson B. L. National Biological Service, Upper Mississippi Science Center 2630 Fanta Reed Road, Post Office Box 818, LaCross, WI 54601-0818, U.S.A aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/1(1996-02), 107-114 1054-3139 53:1<107 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford