Evolution of functional genes in cetaceans driven by natural selection on a phylogenetic and population level

Moura, Andre E. and Natoli, Ada and Rogan, Emer and Hoelzel, A. Rus (2013) Evolution of functional genes in cetaceans driven by natural selection on a phylogenetic and population level. Evolutionary Biology, 40 (3). pp. 341-354. ISSN 0071-3260

Full content URL: http://dx.doi.org/10.1007/s11692-012-9215-2

Documents
__network.uni_staff_S2_jpartridge_Downloads_art%3A10.1007%2Fs11692-012-9215-2.pdf

Request a copy
[img] PDF
__network.uni_staff_S2_jpartridge_Downloads_art%3A10.1007%2Fs11692-012-9215-2.pdf - Whole Document
Restricted to Repository staff only

379kB
Item Type:Article
Item Status:Live Archive

Abstract

Despite the scarcity of geographical barriers in the ocean environment, delphinid
cetaceans often exhibit marked patterns of population structure on a
regional scale. The European coastline is a prime example, with species
exhibiting population structure across well-defined environmental boundaries.
Here we undertake a comprehensive population genetic study on the
European common dolphin (Delphinus delphis, based on 492 samples and 15
loci) and establish that this species shows exceptional panmixia across most
of the study range. We found differentiation only between the eastern and
western Mediterranean, consistent with earlier studies, and here use
approximate Bayesian computations to explore different scenarios to explain
the observed pattern. Our results suggest that a recent population bottleneck
likely contributed significantly to the differentiation of the Eastern Mediterranean
population (in Greek waters). This interpretation is consistent with
independent census data that suggest a sharp population decline in the
recent past. The implication is that an unperturbed population may currently
show panmixia across the full study range. This exception to the
more typical pattern of population structure seen for other regional dolphin
species (and for common dolphin populations elsewhere in the world)
suggests particular ecological or life-history traits distinct to this species in
European waters.

Keywords:bottleneck, common dolphin, microsatellites, population structure
Subjects:C Biological Sciences > C180 Ecology
C Biological Sciences > C161 Marine Biology
C Biological Sciences > C182 Evolution
Divisions:College of Science > School of Life Sciences
ID Code:13961
Deposited On:20 May 2014 15:33

Repository Staff Only: item control page