Page 67 - Dedola2011

present also in populations from other groups, could be explained in the light of a
presumptive past panmictic population of P. nobilis in the Mediterranean fragrnented by
bottle-necks.
In such context, considering the overall sample analysed, P. nobilis shows across the all
Mediterranean four COI mitochondrial haplogroups probably originated by founder
effects. Two of them (P l and P3) are almost entirely characteristic of Sardinia, Elba
Island and Sicily probably and originated recently in western Mediterranean where
diffused by larva! dispersa!; one (P4) characteristic of Grecian and Tunisian populations
only, therefore likely recently originated in eastern Mediterranean; and the haplogroup
P2, which is the second most diffused, being diffused in populations from SES and VL
groups and Cyprus could realistically represent a mark of ancient Mediterranean genetic
settlement of P. nobilis which has been lost as consequence of bottle-necks and
subsequent founder effects.

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Gìan Luca Dedola: ANALISI DELLA VARIABILITÀ GENETICA DI PATELLA FéRRUGINEA, PATEL.LA ULl'SSIPONENSIS (MOLLUSCA: GASTROPODA) E PINNA
NOBILIS (MOLLUSCA: BIVALVIA): lLCONTRJBUTO DEl DATI MOLECOLARl ALLA CONSERVAZIONE DI SPECIE MINACCIATE· Tesi di douorato in Scienze
della natura e delle sue risorse · indiri7.zo BK>logi.a Ambientale, Università degli Studi di Sassarl