Nederlands Soortenregister

Overzicht van de Nederlandse biodiversiteit

Glanzende bolzakpijp Aplidium glabrum

Foto: Arjan Gittenberger


Polyclinidae [familie]
Aplidium [genus] (1/1)
glabrum [soort]

Exotenpaspoort ?

Vestigingsstatus Gevestigd
Zeldzaamheid Lokaal
Invasiviteit Potentieel invasief
Invasiviteit (toelichting) There is debate whether this is an invasive species. The origin might be the North East Atlantic Ocean (Wolff 2005) and/or the Arctic/Boreal region (Hayward & Ryland, 1990) but the North West Pacific has also been mentioned as possible place of origin (VLIZZ 2011). The spread in Dutch waters, especially in the provice of Zeeland, was rather rapid nonetheless it took more than 25 years for the species to reach the Wadden Sea. Transportion within the Wassen Sea probably mainly takes place as fouling material on the hull of pontoons or boats. The introduction in the Eastern Scheldt and Lake Grevelingen was probably caused by the introduction of material used in oystercultures while the dispersion of the species within these waters was probably caused by a combination of natural dispersion and dispersion as fouling materials on hulls of boats.
Type introductie Niet opzettelijk
Jaar van eerste introductie 1977
Jaar van eerste melding 1977
Natuurlijke verspreiding
  • Noordelijke Atlantische Oceaan
  • Noordelijke IJszee
  • Onbekend
  • Verspreiding in Nederland
  • Friesland
  • Noord-Holland
  • Zuid-Holland
  • Zeeland
  • Verspreiding in Nederland (toelichting) The first Dutch record of this species is from 1977 (Yerseke; Eastern Scheldt) after which it invaded the Eastern Scheldt and Lake Grevelingen (Buizer 1989). The first record from the Wadden Sea is from 2009 (Gittenberger et al. 2010). The species is now locally abundant, especially in the Eastern Scheldt and Lake Grevelingen, and often occurs in high densities (Leewis et al. 2005).
  • Mariene habitats
  • Estuaria en brakwatergebieden
  • Wijze van introductie
  • Aquacultuur
  • Ballastwater schip/boot
  • Aangroei op scheepsrompen
  • Onderling verbonden waterwegen/bassins/zeeën
  • Impact Concurrentie
    Ecologische impact (toelichting) These transparant grey, yellow or orange colony forming ascidians, shaped as crusty lumps, are often found in marinas where they grow on ropes, quays, pontoons and other hard substrates. The animals are hermaphroditic; eggs are shed and fertilized in the water; dispersion takes at least partly place through swimming larvae. The animals sometimes overgrow other species and compete for food in the infralittoral and circalittoral. The main food source for this suspensionfeeder is plankton.
    Economische impact (toelichting) There are no assessments of the economic impact of this species in the Netherlands. Anti-fouling products to eradicate this and other species are both expensive and harmfull to the environment. Legislation to limit import of mussels from Ireland (and all attached non- indigenous species) was implanted in 2007, but cancelled in 2008.