Journal article
Spawning stock and recruitment in North Sea cod shaped by food and climate
Proceedings of the Royal Society. B, Biological sciences, Vol.278(1705), pp.504-510
02/22/2011
DOI: 10.1098/rspb.2010.1465
PMID: 20810442
Abstract
In order to provide better fisheries management and conservation decisions, there is a need to discern the underlying relationship between the spawning stock and recruitment of marine fishes, a relationship which is influenced by the environmental conditions. Here, we demonstrate how the environmental conditions (temperature and the food availability for fish larvae) influence the stock-recruitment relationship and indeed what kind of stock-recruitment relationship we might see under different environmental conditions. Using unique zooplankton data from the Continuous Plankton Recorder, we find that food availability (i.e. zooplankton) in essence determines which model applies for the once large North Sea cod (Gadus morhua) stock. Further, we show that recruitment is strengthened during cold years and weakened during warm years. Our combined model explained 45 per cent of the total variance in cod recruitment, while the traditional Ricker and Beverton-Holt models only explained about 10 per cent. Specifically, our approach predicts that a full recovery of the North Sea cod stock might not be expected until the environment becomes more favourable.
Details
- Title: Subtitle
- Spawning stock and recruitment in North Sea cod shaped by food and climate
- Creators
- Esben Moland Olsen - Institute of Marine Research Flødevigen, N-4817 His, NorwayGeir OttersenMarcos LlopeKung-Sik ChanGrégory BeaugrandNils Chr Stenseth
- Resource Type
- Journal article
- Publication Details
- Proceedings of the Royal Society. B, Biological sciences, Vol.278(1705), pp.504-510
- Publisher
- England
- DOI
- 10.1098/rspb.2010.1465
- PMID
- 20810442
- ISSN
- 1471-2970
- eISSN
- 1471-2954
- Language
- English
- Date published
- 02/22/2011
- Academic Unit
- Statistics and Actuarial Science; Radiology
- Record Identifier
- 9983985808302771
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