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The increasing populations of Osilinus lineatus on East Dorset shores (south-west England) in 2008

Published online by Cambridge University Press:  27 August 2010

J.B. Hawthorne
J.B. Hawthorne*
Affiliation:
UpDown, Frome View, Bradford Peverell, Dorchester, Dorset, DT2 9SQ, UK
*
Correspondence should be addressed to: J.B. Hawthorne, UpDown, Frome View, Bradford Peverell, Dorchester, Dorset, DT2 9SQ, UK email: [email protected]
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Abstract

Assessments have been made of the increasing populations of Osilinus lineatus near its eastern English Channel limit of distribution for the year 2008. The first record of a breeding population of Osilinus east of the Isle of Portland at Western Ledges in Portland Harbour was made during a survey in 2004. The 2008 study provides evidence that the breeding range in East Dorset has since extended to Redcliff Point and Osmington Mills, east of Weymouth Bay. Surveyed sites from Portland Harbour to White Nothe have shown large increases in numbers since 2004. The small size of populations to the east of White Nothe indicates that recruitment to sites further east still depended on small numbers of larvae that drifted around Portland Bill from Lyme Bay without supplementation from the Portland Harbour to Osmington Mills sites.

Keywords

Osilinus lineatusdistributionlimitDorsetclimate
Type
Research Article
Information
Marine Biodiversity Records , Volume 3 , June 2010 , e86
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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References

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