Recent expansion of the oriental shrimp Palaemon macrodactylus (Crustacea: Decapoda) on the western coasts of France Nicolas Lavesque, Guy Bachelet, Mélanie Béguer, Michel Girardin, Mario Lepage, Hugues Blanchet, Jean-Claude Sorbe, Julien Modéran, Pierre-Guy Sauriau, Isabelle Auby To cite this version: Nicolas Lavesque, Guy Bachelet, Mélanie Béguer, Michel Girardin, Mario Lepage, et al.. Recent expansion of the oriental shrimp Palaemon macrodactylus (Crustacea: Decapoda) on the western coasts of France. Aquatic Invasions, 2010, 5, pp.S103-S108. 10.3391/ai.2010.5.S1.021. hal-01555501 HAL Id: hal-01555501 https://hal.archives-ouvertes.fr/hal-01555501 Submitted on 4 Jul 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Aquatic Invasions (2010) Volume 5, Supplement 1: S103-S108 doi: 10.3391/ai.2010.5.S1.021 Open Access © 2010 The Author(s). Journal compilation © 2010 REABIC Aquatic Invasions Records Recent expansion of the oriental shrimp Palaemon macrodactylus (Crustacea: Decapoda) on the western coasts of France 1 1 2 2 2 Nicolas Lavesque *, Guy Bachelet , Mélanie Béguer , Michel Girardin , Mario Lepage , Hugues 1 1 3 3 4 Blanchet , Jean-Claude Sorbe , Julien Modéran , Pierre-Guy Sauriau and Isabelle Auby 1UMR 5805 EPOC, CNRS, Université Bordeaux 1, Station Marine d’Arcachon, 2 rue du Professeur Jolyet, 33120 Arcachon, France 2Cemagref, 50 avenue de Verdun, 33612 Cestas, France 3UMR 6250 LIENSs, CNRS, Université de La Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France 4Ifremer, LER Arcachon, Quai du Commandant Silhouette, 33120 Arcachon, France E-mail: [email protected] (NL), [email protected] (GB), [email protected] (MB), [email protected] (MG), [email protected] (ML), [email protected] (HB), [email protected] bordeaux1.fr (JCS), [email protected] (JM), [email protected] (PGS), [email protected] (IA) Received: 4 August 2010 / Accepted: 25 September 2010 / Published online: 2 October 2010 Abstract The invasive oriental shrimp Palaemon macrodactylus Rathbun, 1902 has considerably extended its distribution in transitional waters along the Atlantic and Channel coasts of France during the period 2007-2010. The most probable method of a primary introduction of this species is ballast waters, but passive transport by water currents is also a possible mechanism of colonization (secondary introductions). Palaemon macrodactylus is a powerful invader of transitional waters and these new populations should be monitored in the future to assess any consequences to native species. Key words: Palaemon macrodactylus, Palaemonidae, invasive species, western France, transitional waters Introduction Medway in 2004 (Worsfold and Ashelby 2008); Orwell in 2001, Stour in 2002 (Ashelby et al. The oriental shrimp Palaemon macrodactylus 2004)], estuarine and harbour waters in The Rathbun, 1902 is native to the coasts of the Netherlands and Belgium [Scheldt estuary since north-western Pacific: Japan, Korea and northern 1999; IJmuiden, Rotterdam, Zeebrugge, and China (Newman 1963). The first record outside Oostende in 2004 (d’Udekem d’Acoz et al. its native area was in the late 1950s in San 2005)], estuaries in the German Bight, Germany Francisco Bay, California (Newman 1963) and [Weser estuary in 2004, Hooksiel in 2005 the species is now considered to be well- (González-Ortegón et al. 2007)]; the Seine established along the west coast of North estuary, France, in the English Channel, where America, from Willapa Bay, Washington, to the the species was noticed in 2006 (Dauvin 2009); Southern California Bight (Elder and Fuller (2) the southern Bay of Biscay: Gironde 2010). Since that time, it has been reported from estuary since 1998 and Adour estuary in 2006 southern Australia in the 1970s (Pollard and (Béguer et al. 2007); Hutchings 1990), in Mar del Plata harbour, (3) the Gulf of Cádiz (southwestern Iberian Argentina, in 2000 (Spivak et al. 2006), and on Peninsula): Guadalquivir estuary since 1999, the eastern coast of the USA: estuarine system of Guadalete estuary, San Pedro river, Salado river New York City in 2001 (Warkentine and Rachlin (Cuesta et al. 2004, González-Ortegón et al. 2010) and Mystic River, Connecticut in 2010 2007); Guadiana estuary since 2004 (González- (Wajtas 2010). Colonization of European waters Ortegón and Cuesta 2006, Chícharo et al 2009); by P. macrodactylus began in 1992 (Worsfold (4) the Black Sea: Constanta harbour since and Ashelby 2008). Based on published records, 2002, several localities along the Romanian there seem to be four different areas of coast in 2009 (Micu and Niţă 2009) and Varna introduction of this species into Europe: Lake in Bulgaria in 2009 (Raykov et al. 2010). (1) the southern North Sea: estuaries in In this study, new records of P. macrodacty- southeastern England [Thames since 1992 and lus, are reported which were mainly collected S103 N. Lavesque et al. Figure 1. Presence (since and before 2007) and absence of Palaemon macrodactylus on the western coasts of France. Numbers indicate the different sampling stations (see code legend in Annex 1). during sampling of transitional waters for the 1753 meadows and collected at low tide in assessment of ecological quality according to the March 2010. In the other locations (fish surveys European Water Framework Directive and show for the implementation of the Water Framework the recent, rapid expansion of the species along Directive in 2007-2009), P. macrodactylus were the Atlantic and Channel coasts of France. collected using a trawl in daytime between the mid-flow period and the high tide slack period; Materials and methods each tow lasted about 15 minutes. Since 2006, and their first descriptions in Several sheltered systems such as bays or France (Béguer et al. 2007), all specimens of estuaries were sampled from 2007 to 2010 on the Palaemon macrodactylus (Figure 2A) were western coasts of France (Figure 1). Specimens carefully identified using the following of P. macrodactylus were collected using diagnostic characters (Ashelby et al. 2004; different sampling methods. In the Charente d’Udekem d’Acoz et al. 2005; González-Ortegón estuary, shrimps were collected with a plankton and Cuesta 2006): net (surface) and a suprabenthic trawl (bottom) - a whitish longitudinal dorsal stripe running in September 2007. In Arcachon Bay, specimens over the entire body (Figure 2B); were sampled using brush traps placed near - rostrum with 9 to 15 dorsal teeth (usually 10- eelgrass Zostera (Zostera) marina Linnaeus, 13), 3 of which being usually behind the orbit; S104 Expansion of Palaemon macrodactylus in France has never been recorded in the Loire estuary despite several sampling campaigns and the presence of the international harbour of St- Nazaire. Locations where this species has been reported as non-indigenous are often in the vicinity of large international harbours. It is thus generally assumed that the most probable vector of introduction for P. macrodactylus (as pelagic larvae or adults) is the transport and discharge of ship ballast water (Ashelby et al. 2004; Cuesta et (A) al. 2004; d’Udekem d’Acoz et al. 2005; Spivak et al. 2006; Béguer et al. 2007; González- Ortegón et al. 2007; Micu and Niţă 2009). In the present study, most of the records of P. macrodactylus might be linked to shipping traffic because sampling stations were close to international harbours: Adour (Bayonne harbour), Gironde and Garonne (Bordeaux), Charente (La Rochelle and Rochefort), Elorn (Brest), Morlaix (Roscoff) and Bay of Seine (Le Havre). However, other records could be (B) explained by the transport of shrimps or larvae Figure 1. Palaemon macrodactylus, 32 mm, Arcachon Bay, by currents. For example, we assume that the France: (A) lateral view, (B) dorsal view, showing characte- presence of P. macrodactylus in Arcachon Bay is ristic dorsal white stripe (Photographs by N. Lavesque). independent of human activities. Adults or pelagic larvae could be transported by currents from the Gironde estuary located north of - ventral margin of the rostrum with a double Arcachon, where the species is abundant. Waters row of setae; flowing from the Gironde estuary are usually - shorter ramus of the outer flagellum of inclined to the right (clockwise in the northern antennula fused for about 20% of its length to hemisphere) due to the Earth’s rotation (Lazure longer ramus. and Jegou 1998) resulting in northerly directed water currents along the French west coast. Discussion However, during summer, north-westerly winds could generate southward currents and low Since its first records in the Gironde (1998), salinity water, possibly originating from the Adour (2006), and Seine (2006) estuaries Gironde estuary, is regularly detected at the (Béguer et al. 2007; Dauvin 2009), P. entrance to Arcachon Bay (Lazure and Jegou macrodactylus has considerably extended its 1998). The estimated transit time from the distribution in the bays and estuaries along the mouth of the Gironde to reach Arcachon Bay is Atlantic and Channel coasts of France (Figure 1). between 4 and 7 days for a current velocity of It has apparently not yet colonized the most 10-20 cm.s-1 (Lazure and Jegou 1998). These northern estuaries (Slack, Wimereux, Canche, hydrodynamic characteristics support the and Authie), although it is well represented in hypothesis of passive shrimp transport. Such a southeastern England (Ashelby et al. 2004; mode of introduction may also explain the Worsfold and Ashelby 2008), in Belgium and the presence of P. macrodactylus in the Bidassoa Netherlands (d’Udekem d’Acoz et al.