First report and molecular analysis of population stability of the invasive Gulf wedge clam, Rangia cuneata (G.B. Sowerby I, 1832) in the Pomerian Bay (Southern Baltic Sea)

Figures & data

Table I. Chronology and sites of occurrence of wedge clam (Rangia cuneata) in the Baltic Sea

Date	Place	Country	Approx. coordinates	Reference
2010	Vistula Lagoon	Russia	54°37’N 20°05’E	Rudinskaya & Gusev 2012
2011	Vistula Lagoon	Poland	54°21’N 19°29’E	Warzocha & Drgas 2013
2013	Curonian Lagoon	Lithuania	55°34’N 21°09’E	Solovjova, 2014; Solovjova et al. 2019
2013	Kiel Canal near Brunsbüttel	Germany	53°53’N 9°08”E	Bock et al. 2015
2015	Schellbruch Nature Reserve	Germany	53°54’N 10°43’E	Wiese et al. 2016
2016	Svensksundsviken Bay	Sweden	58°35’N 16°23’E	Florin, 2017
2016	Pärnu Bay	Estonia	58°21’N 24°27’E	Möller & Kotta 2017

Figure 1. Range of Rangia cuneata populations in the Baltic Sea since 2010 and recent location of sightings in the Pomeranian Bay and the Oder River estuary. References for observations are listed in the Table I.

Figure 2. Age frequency distribution of live Rangia cuneata specimens collected from the Pomeranian Bay.

Figure 3. Length frequency distribution of live Rangia cuneata specimens collected from the Pomeranian Bay. Vertical dashed line represents mean shell length in the dataset.

Figure 4. Length-at-age curve of Rangia cuneata collected from the Pomeranian Bay. Line represent fitted curve for the sampling site. Shaded areas represent 99% confidence intervals.

Figure 5. Haplotype network (A) and phylogenic neighbour-joining tree (B) of Rangia cuneata based on mitochondrial COI sequences.

Figure 6. Mismatch distribution of pairwise differences. The X-axis represents the number of pairwise differences, and the Y-axis represents their frequency.

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