Table 1. Information about mussel (Mytilus spp.) samples included in the present study.

Group/library name	Species	Location	Year of sampling	N
EduN	M. edulis	The North Sea: The Oosterschelde estuary	2006	2
TroV	M. trossulus	Canada: Vancouver	2012	2
GalM	M. galloprovincialis	The Mediterranean Sea: Trieste and Chioggia and the Black Sea	2012	4
GalT	M. galloprovincialis	Australia: Tasmania, Spring Bay	2012	2
Chil	M. chilensis	Chile: Punta Arenas and Concepción	2012	2

Note:

N, number of specimens.