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Investigation of first year biotic and abiotic influences on the recruitment of pike (Esox lucius) over 48 years in Windermere, U.K.

Paxton, C.G.M.; Winfield, I. J.; Fletcher, J.M.; George, D.G.; Hewitt, D.P.. 2009 Investigation of first year biotic and abiotic influences on the recruitment of pike (Esox lucius) over 48 years in Windermere, U.K. Journal of Fish Biology, 74 (10). 2279-2298. 10.1111/j.1095-8649.2009.02235.x

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Abstract/Summary

Estimated pike Esox lucius recruitment varied by a factor of 16 for females from 1944 to 1991 and by a factor of 27 for males from 1943 to 1990 in Windermere, a temperate, mesotrophic U.K. lake. No significant stock–recruitment relationships were found, but analysis with general additive models (GAMs) revealed that early autumnal water temperature, strength and direction of the North Atlantic Oscillation displacement (corresponding to different climatic conditions in winter) and zooplankton abundance but above all, late summer water temperature were important explanatory variables over the entire time series. Female recruitment was also influenced by young-of-the-year winter temperature. There was no evidence that perch Perca fluviatilis year-class strength, lake level or the summer position of the Gulf Stream influenced recruitment. The fitted models explained up to c. 65% of the overall observed variation between years.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1095-8649.2009.02235.x
Programmes: CEH Programmes pre-2009 publications > Water > WA02 Quantifying processes that link water quality and quantity, biota and physical environment > WA02.3 Physico-chemical processes and effects on freshwater biot
CEH Sections: Parr
ISSN: 0022-1112
NORA Subject Terms: Ecology and Environment
Related URLs:
Date made live: 28 May 2008 15:38
URI: http://nora.nerc.ac.uk/id/eprint/2986

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