Phylogenetic and phylogeographic inferences based on two DNA markers reveal geographic structure of the orangeclaw hermit crab Calcinus tibicen (Anomura: Diogenidae) in the western Atlantic

Autor(es)

Mandai, Silvia Sayuri ^[1] ; Buranelli, Raquel Correa ^[1] ; Schubart, Christoph D. ^[2] ; Mantelatto, Fernando L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, Dept Biol, Lab Bioecol & Systemat Crustaceans LBSC, Ribeirao Preto, SP - Brazil

^[2] Univ Regensburg, Zool & Evolut Biol, Regensburg - Germany

• Tipo de documento: Artigo Científico
• Fonte: MARINE BIOLOGY RESEARCH; v. 14, n. 6, p. 565-580, 2018.
• Citações Web of Science: 0

Resumo

The hermit crab Calcinus tibicen has an extensive distribution along the coasts of the western Atlantic Ocean, from the USA to southern Brazil. The present study aimed to test the hypothesis of the presence of phylogeographic structure of C. tibicen throughout its distribution, evaluating the genetic and morphological variabilities of the species. The molecular data, genetic diversity and demographic history were inferred from 16 different localities for the mitochondrial genes cytochrome oxidase subunit I (COI) (75 specimens) and 16S rRNA (20). The morphological information was based on 99 individuals from the same 16 localities. Results were obtained by the construction of haplotype networks and a phylogenetic tree, an Analysis of Molecular Variance (AMOVA), Tajima's D and Fu's Fs tests, pairwise mismatch distributions under the sudden expansion model, and by estimating divergence times. The haplotype networks show the existence of two genetically well-defined groups that do not share haplotypes. The phylogenetic tree and the matrix of genetic distances suggest lack of gene between North and South Atlantic groups, also corroborated by AMOVA for the COI gene. The genetic distance can be attributed to at least two ecological factors: the existence of a physiological barrier caused by the Amazon River freshwater plume, and the effect of the bifurcation of the westerly flowing South Atlantic oceanic currents creating a gap along the Brazilian coastline. Demographic history analyses suggest that C. tibicen experienced population expansion, probably after the Amazon River changed its direction. Despite the molecular evidence for the existence of a phylogeographic structure, no morphological pattern for each genetic group was observed. Therefore, based on the described molecular differences and the ecological and historical factors suggested, the question arises whether a cryptic species should be recognized for some of the populations of C. tibicen. (AU)

• Processo FAPESP: 14/10639-1 - Variabilidade populacional entre populações do ermitão Calcinus tibicen provenientes do Brasil e do Atlântico Norte avaliada por meio de ferramentas morfológicas e moleculares
• Beneficiário: Silvia Sayuri Mandai
• Linha de fomento: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 09/54931-0 - Melhoria e capacitação das coleções científicas do Departamento de Biologia da Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo
• Beneficiário: Carlos Alberto Garofalo
• Linha de fomento: Auxílio à Pesquisa - Programa Infra-estrutura - Acervos biológicos
• Processo FAPESP: 10/50188-8 - Crustáceos decápodes: multidisciplinaridade na caracterização da biodiversidade marinha do estado de São Paulo (taxonomia, espermiotaxonomia, biologia molecular e dinâmica populacional) (Biodiversidade Marinha)
• Beneficiário: Fernando Luis Medina Mantelatto
• Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 02/08178-9 - Espécies do gênero Portunus do Pacífico oeste e sua relação com as espécies do grupo Atlântico americano: um estudo sobre filogenia molecular, taxonomia e evolução
• Beneficiário: Fernando Luis Medina Mantelatto
• Linha de fomento: Auxílio à Pesquisa - Regular