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JPR Advance Access published online on August 13, 2009
Journal of Plankton Research, doi:10.1093/plankt/fbp052
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© The Author 2009. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Sardine (Sardina pilchardus) egg abundance at station L4, western English Channel, 1988–2008

S. H. Coombs1,*, N. C. Halliday1, D. V. P. Conway1 and T. J. Smyth2

1 Marine Biological Association, Citadel Hill, Plymouth PL1 2PB, UK 2 Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, UK

* CORRESPONDING AUTHOR: shc{at}mba.ac.uk

Received on March 23, 2009; accepted on June 7, 2009


  Abstract

Results from sampling for sardine (Sardina pilchardus) eggs at station L4 in the coastal western English Channel over the period 1988–2008 are presented and discussed in relation to environmental conditions. As previously observed in this area, there is a summer spawning season (mid-March to early July) and one in the autumn (early September to mid-November). The historical trend for increasing autumn spawning has continued. The mean spawning temperatures were 12.6 and 14.5°C for the summer and autumn seasons, respectively. Temperature was negatively correlated with summer egg abundance and positively with autumn egg abundance. A negative correlation between egg abundance and the North Atlantic Oscillation index suggested a link between egg numbers and plankton production.

Corresponding editor: Mark J. Gibbons


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