Evolution of coral reef fish Thalassoma spp. (Labridae). 2. Evolution of the eastern Atlantic species |
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| Authors: | D.?Costagliola,D.?R.?Robertson,P.?Guidetti,S.?Stefanni,P.?Wirtz,J.?B.?Heiser,G.?Bernardi author-information" > author-information__contact u-icon-before" > mailto:bernardi@biology.ucsc.edu" title=" bernardi@biology.ucsc.edu" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author |
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| Affiliation: | (1) Department of Ecology and Evolutionary Biology, University of California, 100 Shaffer Road, Santa Cruz, CA 95060, USA;(2) Dipartimento di Scienze della Vita, Seconda Università di Napoli, Via Vivaldi 43, 81100 Caserta, Italy;(3) Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Rep. de Panama;(4) Laboratory of Zoology and Marine Biology, DiSTeBA, CoNISMa, University of Lecce, Italy;(5) Centro do IMAR—Departamento de Oceanografia e Pesca, Universidade dos Açores, PT 9901-862 Horta (Azores), Portugal;(6) Centro de Ciências do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8000-117 Faro, Portugal;(7) Shoals Marine Laboratory and Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA |
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| Abstract: | The genetic relationships within and among congeneric species of marine fish from the Atlantic and the Mediterranean are poorly known. Relationships among all five species of the wrasse genus Thalassoma present in the Atlantic and the Mediterranean were examined using sequence data from the mitochondrial control region. Sampling was focused on the mid-Atlantic T. sanctaehelenae (Valenciennes, 1839) and T. ascensionis (Quoy & Gaimard, 1834), the eastern Atlantic T. newtoni (Osório, 1891) from Sao Tome, and the eastern Atlantic/Mediterranean T. pavo (Linnaeus, 1758). Two western Atlantic species T. bifasciatum (Bloch, 1791) from the Caribbean and T. noronhanum (Boulenger, 1890) from Brazil served as outgroups. Tissues from a total of 132 individuals were sequenced. T. newtoni from Sao Tome preferentially grouped with the central Atlantic T. sanctaehelenae and T. ascensionis. T. pavo exhibits two distinct coloration patterns, one in the Cape Verde Islands and one in the eastern Atlantic Islands and Mediterranean. However, no genetic discontinuities between the Cape Verde Islands and the remaining samples or between Atlantic and Mediterranean individuals were found. Within Mediterranean populations of T. pavo, our data suggested the presence of a genetic break between eastern and western regions.Communicated by J.P. Grassle, New Brunswick |
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