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Non-indigenous tanaid Sinelobus vanhaareni Bamber, 2014 in the Polish coastal waters – an example of a successful invader

Radosław Brzana
Radosław Brzana
, 
Lena Marszewska
Lena Marszewska
, 
Monika Normant-Saremba
Monika Normant-Saremba
 et 
Magdalena Błażewicz
Magdalena Błażewicz
   | 14 mars 2019
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Article Category: Short communication
Publié en ligne: 14 mars 2019
Pages: 76 - 84
Reçu: 07 août 2018
Accepté: 10 sept. 2018
DOI: https://doi.org/10.1515/ohs-2019-0008
© 2019 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Locations of the sampling sites. GIS layers used for drawing the map were obtained from the GIS Centre of the University of Gdańsk.
Locations of the sampling sites. GIS layers used for drawing the map were obtained from the GIS Centre of the University of Gdańsk.

Figure 2

Non-native and native representatives of Tanaidacea collected in the Gulf of Gdansk, S. vanhaareni: A – female, B – male, C – pleon and H. oerstedii: D – female, E – male, F – pleon (P – pleonite; PT – pleotelson). The scale bar on photograph A applies to photographs B, D and E as well.
Non-native and native representatives of Tanaidacea collected in the Gulf of Gdansk, S. vanhaareni: A – female, B – male, C – pleon and H. oerstedii: D – female, E – male, F – pleon (P – pleonite; PT – pleotelson). The scale bar on photograph A applies to photographs B, D and E as well.

Abundance of Sinelobus vanhaareni, information on the main associated taxa and key environmental parameters at the study sites in Polish coastal waters. Numbers in brackets before sites’ names in the first column refer to those given in Fig. 1 (T – temperature, S – salinity).

Site Sampling date Abundance (max) T (°C) S (PSU) Depth (m) Substrate/sampling method Main associated taxa
(1) Port of Gdynia July 2014 (first record) 3530 ind. m−2 22.0 6.9 1–3 Horizontal artificial hard bottom (settlement plates) Amphibalanus improvisus Gonothyraea loveni Cordylophora caspia
Sept. 2014 47 400 ind. m−2 19.0 7.0 1–7 Horizontal artificial hard bottom (settlement plates) Amphibalanus improvisus Gonothyraea loveni Einhornia crustulenta
Oct. 2014 37 000 ind. m−2 16.3 7.1 1–7 Horizontal artificial hard bottom (settlement plates) Amphibalanus improvisus Gonothyraea loveni Einhornia crustulenta
Oct. 2014 100 per trap 16.1 7.1 9 Artificial habitat collector Leptocheirus pilosus Melita nitida Apocorophium lacustre
July 2015 500 per trap No data 6.9 9 Artificial habitat collector Mytilus trossulus Leptocheirus pilosus Melita nitida
Jan. 2016 100 ind. m−2 1.7 7.3 14 (Soft sediment Van Veen grab) Oligochaeta Polychaeta Limecola balthica Cerastoderma glaucum
June 2016 1 per trap 19.2 6.9 9 Artificial habitat collector Oligochaeta Polychaeta Amphipoda Jaera spp.
Aug. 2016 10 ind. m−2 21.1 7.1 14 Soft sediment (Van Veen grab) Oligochaeta Polychaeta Amphibalanus improvisus Limecola balthica Mytilus trossulus
(2) Gdynia Babie Doły July 2015 3825 ind. m−2 18.6 6.4 2–8 Vertical concrete walls of a man-made offshore structure (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Amphipoda
July 2015 358 ind. m−2 18.6 6.4 8 Natural boulders up to 1 m diameter (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Leptocheirus pilosus
(3) Jastarnia March 2016 1133 ind. m−2 4.0 6.7 2–4 Vertical concrete walls of a man-made offshore structure (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Amphipoda
(4) Naval Base in Hel April 2016 No data 4.2 6.5 2–5 Vertical concrete walls of a breakwater (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Gammarus spp.
(5) Gdańsk National Sailing Centre May 2016 No data 19 4.9 2–4 Verfical man-made concrete piles(Kautsky sampler) Mytilus trossulus Amphibalanus improvisus
(6) Gdynia Orłowo June 2016 1791 ind. m−2 6.1 6.5 5 Natural boulders up to 1 m diameter (Kautsky sampler) Mytitrossulus Amphibalanus improvisus Heterotanais oerstedii
(7) Port of Hel Sept. 2017 60 per trap 18.1 7.2 2 Artificial habitat collectors Hydrobiidae Jaera spp. Mytilus trossulus Heterotanais oerstedii
(8) ORP “Bryza” Shipwreck Jan. 2016 Not present 4.0 7.2 12 Steel plating of a shipwreck (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Amphipoda Jaera spp.
April 2018 Not present 3.9 7.2 12–16 Steel plating of a shipwreck (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Amphipoda Jaera spp.
(9) Słupsk Bank Jan. 2018 Not present 3.6 7.3 14 Natural boulders up to 2 m diameter (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Amphipoda Jaera spp.
March 2018 Not present 4.0 7.3 14 Natural boulders up to 2 m diameter (Kautsky sampler) Mytilus trossulus Amphibalanus improvisus Amphipoda

Comparison of the main taxonomic features used to distinguish S. vanhaareni from H. oerstedii (Haaren & Soors 2009; Bamber 2014; personal observations)

Feature Sinelobus vanhaareni Bamber, 2014 Heterotanais oerstedii (Krøyer, 1842)
Max body length 3.0 mm 2.0 mm
External pigmentati on Dark mottling on dorsal surface of the entire body Creamy white body with no mottling
Thorax Pereonites rounded or trapezoidal in shape, which creates notched lateral edges of the animal Pereonites more rectangular in shape, which makes the notching less visible
Pleon 4 pleonites and pleotelson 5 pleonites and pleotelson
Each of pleonites 1–3 twice as long as pleonite 4 Pleonites 1–5 subequal in length
Pleonite 1 narrowed anteriorly, which makes the entire pleon well pronounced Pleonite 1 rectangular in shape, which makes the entire pleon less distinct
3 pairs of ventral pleopods on pleonites 1–3 5 pairs of ventral pleopods on pleonites 1–5
Two rows of plumose setae on dorsal side of pleonites 1–3 No plumose setae on dorsal side of pleon
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