Biochemical evidences for two sibling species of genus Myliobatis (chondrichthyes: myliobatidae) in South Brazil |
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| Institution: | 1. Departamento de Zoologia, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, rua São Francisco Xavier, 524, Rio de Janeiro, 20559-900, Brazil;2. School of Earth and Planetary Sciences, Birkbeck College, Malet Street, London, WC1E 7HX, UK;3. Instituto de Geología, Universidad Nacional Autónoma de México, Circuito de la Investigación S/N, Ciudad Uniersitaria, Delegación Coyoacán, Ciudad de México, 04510, Mexico;1. Departamento de Biologia Marinha e Ambientes Costeiros, Universidade Federal Fluminense (UFF), Laboratório de Paleoecologia e Mudanças Globais (LP&MG), Campus Gragoatá, Bloco M, CEP: 24210?201, Niterói, RJ, Brazil;2. AASPE, Archéozoologie, Archéobotanique: Sociétés, Pratiques, Environnements (UMR 7209), Département Homme et Environnement, Muséum National D’Histoire Naturelle, CNRS, 55 Rue Buffon, Case Postale N° 56 (Bât. Anatomie Comparée), F?75231, Paris Cedex 05, France;3. Programa de Pós-Graduação em Arqueologia do Museu Nacional (PPGArq), Universidade Federal do Rio de Janeiro (UFRJ), Quinta da Boa Vista, S/n, Rio de Janeiro, 20940?040, RJ, Brazil;4. Departamento de Geoquímica, Universidade Federal Fluminense, Outeiro São João Batista, S/n, Niterói, 24001?970, RJ, Brazil;1. Instituto de Oceanografia, Universidade Federal do Rio Grande – FURG, Av. Italia Km 8, Campus Carreiros, Rio Grande, RS CEP 96201-900, Brazil;2. Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-UBA, Instituto de Ecología, Genética y Evolución de Buenos Aires – IEGEBA/CONICET, Piso 4, Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina;3. Instituto de Ciências Biológicas, Universidade Federal do Rio Grande – FURG, Av. Italia Km 8, Campus Carreiros, Rio Grande, RS CEP 96201-900, Brazil;4. Departamento e Pós Graduação em Biologia Marinha, Universidade Federal Fluminense, Caixa Postal 100644, Niterói, RJ CEP 24001-970, Brazil;5. Núcleo de Pesquisa e Desenvolvimento do Litoral Norte, Instituto de Pesca-APTA-SAA/SP, Rua Joaquim Lauro de Monte Claro Neto, 2275, Itaguá, Ubatuba, SP CEP 11680-000, Brazil;6. Centro de Ciências Tecnológicas da Terra e do Mar, Universidade do Vale do Itajaí, Rua Uruguai, 457, Itajaí, SC CEP 88302-202, Brazil;7. Grupo de Biotaxonomía Morfológica y molecular de peces, IIMyC-CONICET, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina;1. Department Biomaterials, Max Planck Institute of Colloids & Interfaces, Potsdam, Germany;2. Division of Clinical and Functional Anatomy, Medical University of Innsbruck, Innsbruck, Austria;3. Julius Wolff Institute, Charité – Universitätsmedizin Berlin, Germany;4. Department for Restorative and Preventive Dentistry, Charité – Universitätsmedizin Berlin, Germany;5. Department Visualization and Data Analysis, Zuse Institute Berlin, Germany;6. Department of Biology, The University of Tampa, 401 W. Kennedy Blvd, Tampa, FL, USA;7. Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, USA;8. Department of Chemical and Biological Engineering, University of Ottawa, Canada;1. Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia, Jequié, BA, Brazil;2. Department of Natural Sciences, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista, BA, Brazil;3. Institute of Coastal Studies, Universidade Federal do Pará, Bragança, PA, Brazil |
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| Abstract: | - 1.1. Two morphotypes of Myliobatis from the demersal fishery off the Rio Grande (Brazil) were studied.
- 2.2. Thirty-two alleles were detected and resolved by 27 loci.
- 3.3. Nei's measure of genetic identity was 0.8306 and Thorpe's similarity was 0.6990. Mean heterozygosities observed were 0.1327 for the “DE” morphotype and 0.0409 for the “DL” morphotype.
- 4.4. Seven loci were fixed differently in the two taxa studied. This indicates the existence of a barrier to gene-flow between them, showing that both morphotypes belong to different species.
- 5.5. Jaccard's measure of similarity was calculated and a phenogram with the two morphotypes and M. freminvillii was constructed using isoelectric focusing of total soluble proteins. This showed a higher similarity between the two morphotypes of Myliobatis than M. freminvillii.
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