RESEARCH PAPER
Cepaea nemoralis (L.) on Öland, Sweden: recent invasion and unexpected variation
 
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1
Department of Animal and Plant Sciences, University of Sheffield, United Kingdom
 
2
Department of Zoology, the Natural History Museum, London, United Kingdom
 
3
Göteborg Natural History Museum, Sweden
 
4
Gothenburg Global Biodiversity Centre, University of Gothenburg, Göteborg, Sweden
 
 
Submission date: 2020-09-02
 
 
Final revision date: 2020-11-05
 
 
Acceptance date: 2020-11-06
 
 
Online publication date: 2020-12-04
 
 
Publication date: 2020-12-04
 
 
Corresponding author
Robert A. D. Cameron   

Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, United Kingdom
Department of Zoology, the Natural History Museum, London SW7 5BD, United Kingdom
 
 
Folia Malacol. 2020;28(4):303-310
 
KEYWORDS
ABSTRACT
Cepaea nemoralis is a recently introduced species on Öland. Discounting an early and debateable record, the species has been recorded only in the 21st century, despite intensive earlier faunistic surveys. A recent survey has yielded records from the whole length of the island (137 km), but the majority of known populations are in its southern half, most particularly around the settlements of Mörbylånga, Gräsgård and Färjestaden. Populations are usually in anthropogenic habitats. Most appear small and isolated by less disturbed areas. Nearly all samples are polymorphic for both colour and banding morphs, and the variation among populations is low when compared with similar sets from other places where recent colonisation has occurred. There is no latitudinal variation in morph frequencies, nor is any spatial autocorrelation apparent. While a relatively uniform and rigorous selection regime could account for the patterns seen, a single initial introduction followed by transport of propagules large enough to minimise founder effects is also possible
 
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CITATIONS (3):
1.
Comparative analysis of phenotypic variability of introduced land snail Cepaea nemoralis (Gastropoda: Helicidae) in two large Eastern European cities
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2.
Deep structure, long‐distance migration and admixture in the colour polymorphic land snail Cepaea nemoralis
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3.
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