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Faasse, M.; Van Moorsel, G. (2003). The North-American amphipods, Melita nitida Smith, 1873 and Incisocalliope aestuarius (Watling and Maurer, 1973) (Crustacea: Amphipoda: Gammaridea), introduced to the Western Scheldt estuary (The Netherlands). Aquatic Ecology. 37(1): 13-22.
10.1023/a:1022120729031 [view]
Faasse, M.; Van Moorsel, G.
The North-American amphipods, Melita nitida Smith, 1873 and Incisocalliope aestuarius (Watling and Maurer, 1973) (Crustacea: Amphipoda: Gammaridea), introduced to the Western Scheldt estuary (The Netherlands)
Aquatic Ecology
37(1): 13-22
The American amphipod species Melita nitida and Incisocalliopeaestuarius have been found in the Western Scheldt estuary (theNetherlands). This is the first record of these species in thenorth-east Atlantic. Shipping is the most likely vector of introduction. The distribution of both species is investigated andcompared with the distribution and the microhabitat ofco-occurring amphipod species. Melita nitida is known from both the east and west coast of North America and I. aestuariusoriginates from the east coast of North America. Until now neitherhas been reported from other parts of the world. In the Netherlands both species are restricted to the mesohaline part of the Western Scheldt. Melita nitida occurs predominantly underPacific oysters at the underside of boulders, mainly sublittorally. Incisocalliope aestuarius is associated to hydrozoans. Both microhabitats are hardly utilized by other amphipod species. Therefore, the theory that the existence of many empty niches in north-western European brackish waters make this environment particularly susceptible to invasions of alien species is corroborated. The application of hard substrates in a regionoriginally predominated by soft bottoms moreover facilitates theintroduction of exotic species. The species community on hardsubstrates in the mesohaline part of the Western Scheldt containsa high proportion of introduced species: approximately one thirdof the macrofauna species is of allochthonous origin.
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2013-01-12 18:30:12Z
2018-01-30 13:09:16Z

Bath for Corophium volutator (Pallas, 1766) 
Bath for Incisocalliope aestuarius (Watling & Maurer, 1973) 
Bath for Melita nitida Smith, 1873 
Bath for Melita palmata (Montagu, 1804) 
Borssele for Caprella linearis (Linnaeus, 1767) 
Borssele for Melita palmata (Montagu, 1804) 
Bredene for Jassa marmorata Holmes, 1905 
Breskens for Jassa herdmani (Walker, 1893) 
Dutch part of the North Sea for Melita nitida Smith, 1873  (origin: alien)
Ellewoutsdijk for Melita palmata (Montagu, 1804) 
Ellewoutsdijk for Monocorophium insidiosum (Crawford, 1937) 
Geul van Baarland for Corophium volutator (Pallas, 1766) 
Geul van Baarland for Incisocalliope aestuarius (Watling & Maurer, 1973) 
Geul van Baarland for Jassa marmorata Holmes, 1905 
Geul van Baarland for Melita nitida Smith, 1873 
Geul van Baarland for Melita palmata (Montagu, 1804) 
Hoedekenskerke (polder) for Caprella linearis (Linnaeus, 1767) 
Hoedekenskerke (polder) for Gammarus crinicornis Stock, 1966 
Hoedekenskerke (polder) for Incisocalliope aestuarius (Watling & Maurer, 1973) 
Hoedekenskerke (polder) for Jassa marmorata Holmes, 1905 
Hoedekenskerke (polder) for Melita palmata (Montagu, 1804) 
Hoedekenskerke (polder) for Monocorophium insidiosum (Crawford, 1937) 
Kruiningen for Melita palmata (Montagu, 1804) 
North West Atlantic for Melita nitida Smith, 1873 
Rittem for Gammarellus angulosus (Rathke, 1843) 
Rittem for Melita palmata (Montagu, 1804) 
Rittem for Monocorophium insidiosum (Crawford, 1937) 
Rozenburg for Gammarus salinus Spooner, 1947 
Rozenburg for Gammarus tigrinus Sexton, 1939 
's Gravenpolder for Gammarus salinus Spooner, 1947 
's Gravenpolder for Melita palmata (Montagu, 1804) 
Scheldt estuary for Incisocalliope aestuarius (Watling & Maurer, 1973)  (origin: alien)
Terneuzen for Melita palmata (Montagu, 1804) 
Waarde for Gammarus zaddachi Sexton, 1912 
Walsoorden for Corophium volutator (Pallas, 1766) 
Walsoorden for Gammarus salinus Spooner, 1947 
Walsoorden for Incisocalliope aestuarius (Watling & Maurer, 1973) 
Walsoorden for Melita nitida Smith, 1873 
Walsoorden for Melita palmata (Montagu, 1804) 
Walsoorden for Monocorophium insidiosum (Crawford, 1937) 
Westerschelde for Incisocalliope aestuarius (Watling & Maurer, 1973) 
Westerschelde for Melita nitida Smith, 1873