First and repeated records of the tropical-temperate crab Asthenognathus atlanticus Monod, 1932 (Decapoda: Brachyura) in the eastern part of the Bay of Seine (eastern English Channel, France)
|Author(s)||Jourde Jerome1, 2, Alizier Sandrine3, Dancie Chloe2, Dauvin Jean-Claude4, Desroy Nicolas5, Dubut Severine2, Gentil Franck6, 7, Grall Jacques8, Hanin Camille2, Lanshere Julien2, Thiebaut Eric6, 7|
|Affiliation(s)||1 : Univ La Rochelle, Inst Littoral & Environm, Observ Faune Flore Pertuis Charentais OBIONE, F-17000 La Rochelle, France.
2 : Cellule Suivi Littoral Normand, F-76600 Le Havre, France.
3 : Univ Lille 1, Stn Marine, CNRS UMR LOG 8187, F-62930 Wimereux, France.
4 : Univ Caen Basse Normandie, Lab Morphodynam Continentale & Cotiere, UMR CNRS 6143 M2C, F-52425 Caen, France.
5 : Stn IFREMER, CRESCO, F-35801 Dinard, France.
6 : Univ Paris 06, UMR 7144, Stn Biol Roscoff, Equipe Diversite & Connectivite Paysages Marins, F-29680 Roscoff, France.
7 : CNRS, UMR Adaptat & Diversite Milieu Marin 7144, Stn Biol Roscoff, F-29680 Roscoff, France.
8 : Inst Univ Europeen Mer, CNRS, UMS 3113, Observ Domaine Cotier, F-29280 Plouzane, France.
|Source||Cahiers De Biologie Marine (0007-9723) (Cahiers De Biologie Marine), 2012 , Vol. 53 , N. 4 , P. 525-532|
|WOS© Times Cited||7|
|Keyword(s)||Crustacea Decapoda, Asthenognathus atlanticus, Bay of Seine, Geographical extension, Eastern English Channel|
|Abstract||Asthenognathus atlanticus Monod, 1932, has been reported for the first time from the eastern part of the Bay of Seine (eastern English Channel). A total of 30 specimens were collected between the years 2008 and 2011, along the Normandy coast from Ouistreham to Antifer, mainly on mud and muddy sand habitats, between 10 and 25 m depth. The distribution range of A. atlanticus has been previously known to cover eastern Atlantic coasts from Angola to the western English Channel, where it reached its northern limits. It is also present in the western part of the Mediterranean Sea. The changes in the sediment composition of the eastern Bay of Seine have probably led to the development of a potentially favorable habitat for this species. However, the data collected have not yet been sufficient to ascertain the origin, and the method of introduction of the eastern English Channel specimens. In the discussion, we ponder if they might have originated from the western English Channel populations, and was transported as larvae in the eastern English Channel; they could have originated from a more distant population, and have been brought to the eastern English Channel through human activities. Each hypothesis is possible in theory.|