Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers |
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Authors: | Apostolos P Apostolidis Katerina A Moutou Costas Stamatis and Zissis Mamuris |
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Institution: | (1) Institute of Marine Biological Resources, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio, P.O. Box 712, 19013 Anavissos, Attica, Greece |
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Abstract: | In the present work we used three molecular techniques (allozymes, RAPDs and mtDNA RFLPs) in order to study the genetic structure
of three commercial marine species (Mullus surmuletus, Mullus barbatus, and Pagellus erythrinus). Each species was sampled from three locations within the Gulf of Pagasitikos, Greece and from two neighbouring locations
outside the Gulf (Trikeri and Alonissos). Values of genetic heterozygosity and nucleotide diversity for all populations studied
were similar or above the mean values observed in marine fishes. None of the three types of molecular markers used revealed
diagnostic patterns, which could allow the allocation of individuals to one of the populations. The analyses revealed that
the three populations within Pagasitikos were homogenous representing thus a panmictic stock. However, there were evidences
of genetic population subdivision between localities from inside and outside of the Pagasitikos Gulf. The results provide
essential information for the design of a sustainable management plan of the Gulf of Pagasitikos and its demersal fish resources. |
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