GENETIC AND MORPHOLOGICAL VARIATION IN THE LAND WINKLE POMATIAS ELEGANS (MULLER) (CAENOGASTROPODA: POMATIASIDAE) |
| |
Authors: | JORDAENS KURT; PLATTS ELIZABETH; BACKELJAU THIERRY |
| |
Institution: |
1
Evolutionary Biology Group, University of Antwerp (RUCA), Groenenborgerlaan 171, B-2020 Antwerp, Belgium;
2
Belmont, New Road, Littleton, Winchester, Hants, SO 22 6QR, UK.;
3
Royal Belgian Institute of Natural Sciences, Vautierstraat 29, B-1000 Brussels, Belgium. |
| |
Abstract: | Population genetics and shell morphology have been studiedin 11
populations of the poorly colonizing land caenogastropodPomatias
elegans. The total area of suitable habitats in northwestEurope is
shrinking and many isolated populations are becomingvulnerable to
extinction. In this study we tested whether theconcept of management
units (i.e. groups of population withsignificantly different allele
frequencies due to demographicindependence) is applicable to the
conservation of P. elegans.Fst values indicated strong genetic
differentiation and thuslittle genetic exchange between
populations. Allozyme differentiationcould be explained with an
isolation by distance model, whereasmorphological differentiation
could not. A morphological differenceexists between sexes but not
sufficient to discriminate malesand females. A Mantel test showed no
significant relationshipbetween morphological distance (size
corrected or not) and geneticdistance. Since allele frequencies
differed even among populationsin areas where P. elegans is not
threathened, we conclude thatin the case of P. elegans, defining
management units with allozymesmay not be an appropriate way to
select the most suitable populationsfor conservation. (Received 3 April 2000; accepted 25 August 2000) |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|