Fig. 1
From: First record of the Pacific oyster Magallana gigas (Thunberg, 1793) in the Baltic Sea proper
a Overview of the known distribution of Magallana gigas in northern Europe and location of Kiel Bight (blue square). Previously published locations of M. gigas until 2008 are indicated by grey areas and black dots, which represent abundant and isolated oyster finds, respectively (Wrange et al. 2010). Additional locations of the government report of Dolmer et al. (2014) from ca. 2012 are denoted by black open circles. b Map of the Kiel Bight with sampling locations as blue pins, and the location of the hydrographic station ‘Kiel Lighthouse’ as a yellow pin, generated in Google Earth