Genetic variability in mitochondrial and nuclear genes of Larus dominicanus (Charadriiformes, Laridae) from the Brazilian coast

Autor(es)

de Mendonca Dantas, Gisele Pires ^[1] ; Meyer, Diogo ^[1] ; Godinho, Raquel ^[2] ; Ferrand, Nuno ^[2] ; Morgante, Joao Stenghel ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Genet & Biol Evolut, Lab Biol Evolut & Conservacao Vertebrados, Sao Paulo - Brazil

^[2] Ctr Invest Biodiversidade & Recursos Nat, Oporto - Portugal

• Tipo de documento: Artigo Científico
• Fonte: GENETICS AND MOLECULAR BIOLOGY; v. 35, n. 4, p. 874-885, DEC 2012.
• Citações Web of Science: 7

Resumo

Several phylogeographic studies of seabirds have documented low genetic diversity that has been attributed to bottleneck events or individual capacity for dispersal. Few studies have been done in seabirds on the Brazilian coast and all have shown low genetic differentiation on a wide geographic scale. The Kelp Gull is a common species with a wide distribution in the Southern Hemisphere. In this study, we used mitochondrial and nuclear markers to examine the genetic variability of Kelp Gull populations on the Brazilian coast and compared this variability with that of sub-Antarctic island populations of this species. Kelp Gulls showed extremely low genetic variability for mitochondrial markers (cytb and ATPase) and high diversity for a nuclear locus (intron 7 of the β-fibrinogen). The intraspecific evolutionary history of Kelp Gulls showed that the variability found in intron 7 of the β-fibrinogen gene was compatible with the variability expected under neutral evolution but suggested an increase in population size during the last 10,000 years. However, none of the markers revealed evidence of a bottleneck population. These findings indicate that the recent origin of Kelp Gulls is the main explanation for their nuclear diversity, although selective pressure on the mtDNA of this species cannot be discarded. (AU)

• Processo FAPESP: 05/55438-4 - Filogeografia de vertebrados neotropicais: padrões de variação, inferências de processos evolutivos e implicações para a conservação biológica
• Beneficiário: João Stenghel Morgante
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 03/01599-1 - Biologia reprodutiva, estrutura populacional e variabilidade genética de Larus dominicanus
• Beneficiário: Gisele Pires de Mendonça Dantas
• Modalidade de apoio: Bolsas no Brasil - Doutorado