Fig. 2
From: Insights on the origin of invasive copepods colonizing Basque estuaries; a DNA barcoding approach
Acartia tonsa. a Maximum likelihood (ML) tree, constructed with the T92 + G model of evolution, for a 481 bp MT-CO1 region including 293 A. tonsa sequences. Only A. tonsa specimens collected at European locations (n = 55) are labelled with both the GenBank accession number and the geographical location (NSEA and MEDIT stand for, respectively, North Sea and Mediterranean Sea). Basque estuaries’ specimens were labelled as BILBAO 1-10 and URDAIBAI 1-8. A sole A. hudsonica Pinhey 1926 sequence (EU274431, highlighted) was included as an out-group. The scale bar indicates substitutions per nucleotide position. b Median-Joining (MJ) network analysis for the European collected A. tonsa individuals. MJ network constructed as in Fig. 1b. Colours corresponded to the different geographical areas (legend superimposed). Numbers correspond to the location of variable sites along the assembled region