Sampling native and non-native mobile epifauna with baited traps and habitat collectors – Port of Gdynia case study (southern Baltic Sea, Poland)

Figure 1

Figure 2

Mobile epifauna species collected in the Port of Gdynia by different types of traps (symbols are explained in the text), from May to October 2014_ “+” – present, n – the number of deployments, non-indigenous species are marked in bold

Species	Baited trap		Habitat collector
	BT1n = 7	BT2n = 7	HC1n = 2	HC2n = 2
Crustacea
Neomysis integer (Leach, 1814)			+
Praunus fl exuosus (Müller, 1776)			+
Heterotanais oerstedii (Krøyer, 1842)				+
Sinelobus vanhaareni Bamber, 2014				+
Idotea chelipes (Pallas, 1766)	+	+	+	+
Jaera albifrons Leach, 1814			+	+
Lekanesphaera rugicauda (Leach, 1814)				+
Apocorophium lacustre (Vanhöffen, 1911)			+	+
Leptocheirus pilosus Zaddach, 1844			+	+
Melita niti da Smith, 1873			+	+
Gammarus zaddachi Sexton, 1912			+	+
Gammarus salinus Spooner, 1947				+
Gammarus ti grinus Sexton, 1939			+	+
Palaemon adspersus Rathke, 1837	+	+		+
Palaemon elegans Rathke, 1837	+	+
Rhithropanopeus harrisii (Gould, 1841)		+	+	+
Gastropoda
Tenellia adspersa (Nordmann, 1845)				+
Acti nopterygii
Neogobius melanostomus (Pallas, 1814)	+	+	+	+
Nerophis ophidion (Linnaeus, 1758)	+	+	+
Number of all species	5	6	12	15
Number of NIS	2	3	4	5

The number of species and total observed abundance of mobile epifauna collected in the inner part of the Port of Gdynia by different types of traps (symbols are explained in the text), from May to July 2014_ Non-indigenous species are marked in bold, n – number of deployments_

Species number/abundance	June–July			May–July
	BT1n = 2	BT2n = 2	HC1n = 1	BT1n = 3	BT2n = 3	HC2n = 1
Number of all species	3	5	9	3	5	10
Number of NIS	1	1	2	1	1	4
Abundance of all species	16	8	35	18	8	87
Abundance of NIS	1	2	9	1	2	20