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Phylogeography of the Atlanto-Mediterranean sea cucumber Holothuria (Holothuria) mammata: the
 

Summary: Phylogeography of the Atlanto-Mediterranean sea
cucumber Holothuria (Holothuria) mammata: the
combined effects of historical processes and current
oceanographical pattern
G. H. BORRERO-PEŽ REZ,* M. GONZAŽ LEZ-WANGUš EMERT,* C. MARCOS* and
A. PEŽ REZ-RUZAFA*
*Departamento de EcologiŽa e HidrologiŽa, Facultad de BiologiŽa, Universidad de Murcia, Campus de Espinardo, 30100 Murcia,
Spain, Centro de Cie^ncias do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
Abstract
We assessed the genetic structure of populations of the widely distributed sea cucumber
Holothuria (Holothuria) mammata Grube, 1840, and investigated the effects of marine
barriers to gene flow and historical processes. Several potential genetic breaks were
considered, which would separate the Atlantic and Mediterranean basins, the isolated
Macaronesian Islands from the other locations analysed, and the Western Mediterranean
and Aegean Sea (Eastern Mediterranean). We analysed mitochondrial 16S and COI gene
sequences from 177 individuals from four Atlantic locations and four Mediterranean
locations. Haplotype diversity was high (H = 0.9307 for 16S and 0.9203 for COI), and the
haplotypes were closely related (p = 0.0058 for 16S and 0.0071 for COI). The lowest
genetic diversities were found in the Aegean Sea population. Our results showed that the
COI gene was more variable and more useful for the detection of population structure

  

Source: Alberto, Filipe - Centro de Ciencias do Mar, Universidade do Algarve

 

Collections: Environmental Sciences and Ecology; Biology and Medicine