Journal ArticleDOI
Difference in habitat selection by different morphs of the land snail Arianta arbustorum
TLDR
There was a general tendency for the frequency of recapture to increase with increasing age in both morphs and Habitat selection resulting from different behaviour of different morphs of A. arbustorum is discussed.Abstract:
The behaviour of morphs of Arianta arbustorum has been investigated using a new technique involving a paint which fades in daylight. The technique was used to study the response of different morphs to exposure to sunlight at a homogeneous woodland habitat and a heterogeneous open habitat. The yellow morph showed a significantly higher rate of fading than the brown morph. A mark, release and recapture programme was used to analyse the association between frequencies of different morphs recaptured and not recaptured. In both habitats, there was a general tendency for the frequency of recapture to increase with increasing age in both morphs. Habitat selection resulting from different behaviour of different morphs of A. arbustorum is discussed. Morph frequencies can be related to habitat, the brown morphs of A. arbustorum are significantly less frequent in the open habitat. The behavioural responses of Cepaea hortensis, present with A. arbustorum in two other populations, to the exposure of sunshine were also studied. Climatic selection by solar energy associated with different morphs, species and habitat are also discussed.read more
Citations
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Journal ArticleDOI
Genetic polymorphism in heterogeneous environments: a decade later
TL;DR: The purpose of this review is to evaluate the research of the intervening decade on genetic polymorphism in variable environments and to review the theoretical developments in the past decade.
Journal ArticleDOI
Genetic Variation for Habitat Preference: Evidence and Explanations
John Jaenike,Robert D. Holt +1 more
TL;DR: It is shown theoretically that under hard selection, optimal habitat selection may often lower the probability of maintaining a polymorphism at a locus that affects adaptation to different habitats, and soft selection appears much more likely to promote variation for habitat preference.
Journal ArticleDOI
Citizen science reveals unexpected continental-scale evolutionary change in a model organism
Jonathan Silvertown,Laurence M. Cook,Robert A. D. Cameron,Mike Dodd,Kevin McConway,Jenny P. Worthington,Peter W. Skelton,Christian Anton,Oliver Bossdorf,Bruno Baur,Menno Schilthuizen,Benoît Fontaine,Helmut Sattmann,Giorgio Bertorelle,Maria Correia,Cristina da Cunha Hueb Barata de Oliveira,Beata M. Pokryszko,Małgorzata Ożgo,Arturs Stalažs,Eoin Gill,Üllar Rammul,Péter Sólymos,Zoltán Fehér,Xavier Juan +23 more
TL;DR: This work tested for evolutionary changes in shell albedo that might have been driven by the warming of the climate in Europe over the last half century by compiling an historical dataset for 6,515 native populations of C. nemoralis and comparing this with new data on nearly 3,000 populations.
Journal ArticleDOI
Patterns of dispersion, density and dispersal in alpine populations of the land snail Arianta arbustorum (L.) (Helicidae)
TL;DR: In studying populations of the land snail Arianta arbustorum in the eastern Swiss Alps, juvenile and subadult snails were found to be aggregated all the time, while adults were mostly aggregated during summer, the main mating period, while the intensity of aggregations was influenced by weather conditions.
Journal ArticleDOI
Natural selection for apostasy and crypsis acting on the shell colour polymorphism of a mangrove snail, Littoraria filosa (Sowerby) (Gastropoda: Littorinidae)
TL;DR: By manipulating the colour frequencies of subpopulations of small snails isolated on individual trees, it was shown that the disappearance of yellow and brown shells was frequency-dependent, consistent with hypotheses of mimicry of background elements by the morphs and of apostatic selection by unknown predators.
References
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Journal ArticleDOI
Colour, sunlight and internal temperatures in the land-snail Cepaea nemoralis (L.).
TL;DR: Mercury-filled shells and live snails of different colours were exposed to sunlight and large differences in pigmentation led to more pronounced differences in temperatures than did small differences.
Journal ArticleDOI
Ecological Genetics and Natural Selection in Molluscs Climatic selection has an important effect on some patterns of gene distribution in snail populations
TL;DR: Analysis of 500,000 C. nemoralis snails from throughout Europe shows that there is a strong positive association between gene frequencies at the shell color locus and mean summer temperature, but that no climatic correlations are obvious at other loci.
Related Papers (5)
Polymorphism in Cepaea: A Problem with Too Many Solutions?
Some Data on the Genetics of Shell-Character Polymorphism in the Snail ARIANTA ARBUSTORUM.
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