Factors shaping contemporary patterns of genetic diversity of the Portuguese endemic cyprinids
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1
ISPA, Portugal
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2
CEF—Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Portugal
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3
CERis—Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, Portugal
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4
Instituto da Conservação da Natureza e das Florestas, I.P., Portugal
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5
Museo Nacional de Ciencias Naturales, CSIC, Portugal
Iberian cyprinids are currently highly endangered, with over 68% of the species raising some level of conservation concern. Population declines were reported in the last decades, however, it was unknown if it was coupled with the depletion of gene pools. In order to assess the genetic diversity distribution patterns of native cyprinid species, the Portuguese hydrographical network was extensively covered (all the 34 river basins and 47 sub-basins). A total of 188 populations belonging to 16 cyprinid species of Squalius, Luciobarbus, Achondrostoma, Iberochondrostoma, Anaecypris and Pseudochondrostoma were characterized, for a total of 3,678 cytochrome b gene sequences. We found differences among populations from the same species and between species with identical distribution areas. Factors shaping the contemporary patterns of genetic diversity were explored and the results revealed the role of latitude, inter-basin connectivity, migratory behaviour, species maximum size, species range and other species intrinsic traits in determining the genetic diversity of sampled populations. Contrastingly, drainage area and hydrological regime (permanent vs. temporary) seem to have no significant effect on genetic diversity. Species intrinsic traits, maximum size attained, inter-basin connectivity and latitude explained over 30% of the haplotype diversity variance and, generally, the levels of diversity were significantly higher for smaller sized species, from connected and southerly river basins.
Keywords:
Haplotype diversity,
Nucleotide diversity,
fish conservation,
Genetic diversity drivers,
Endangered Species
Conference:
IMMR | International Meeting on Marine Research 2016, Peniche, Portugal, 14 Jul - 15 Jul, 2016.
Presentation Type:
Poster presentation
Topic:
Biodiversity, Conservation and Coastal Management
Citation:
Sousa Santos
C,
Robalo
JI,
Pereira
AM,
Branco
P,
Santos
JM,
Ferreira
MT,
Sousa
M and
Doadrio
I
(2016). Factors shaping contemporary patterns of genetic diversity of the Portuguese endemic cyprinids.
Front. Mar. Sci.
Conference Abstract:
IMMR | International Meeting on Marine Research 2016.
doi: 10.3389/conf.FMARS.2016.04.00072
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Received:
28 Apr 2016;
Published Online:
13 Jul 2016.
*
Correspondence:
PhD. Carla Sousa Santos, ISPA, Lisboa, Portugal, csousasantos@gmail.com