Cah. Biol. Mar. (2016) 57 : 323-328

First records of two decapod crustaceans, the caramote prawn Penaeus kerathurus and the blue crab Callinectes sapidus from Galician waters (NE Atlantic)

Rafael BAÑÓN1, José A. CUESTA2, Bruno ALMÓN1, Jacinto PÉREZ-DIESTE1, Juan E. TRIGO1 and Maria BERTA RÍOS3 (1) Grupo de Estudos do MedioMariño (GEMM), puertodeportivo s/n 15960 Ribeira, A Coruña, E-mail: [email protected] (2) Instituto de Ciencias Marinas de Andalucía, CSIC, Avenida República Saharaui, 2, Puerto Real 11519, Cádiz, Spain (3) Cofradía de Pescadores San José, Avda. de Bueu s/n 36940, Cangas do Morrazo, Pontevedra, Spain

Abstract: Two unusual crustacean decapods are reported for the first time from the coasts of (NW Spain). A specimen of caramote prawn Penaeus kerathurus (Penaeidae) was caught in the Ría de Arousa in 2014 and a specimen of blue crab Callinectes sapidus (Portunidae) was caught in the Ría de in 2015, the first one being a native species whereas the second is an exotic one. A tropicalization process due to ocean warming could favour the arrival of warm water species to temperate latitudes as well as the establishment of introduced species.

Résumé : Premiers signalements de deux crustacés décapodes, la crevette Penaeus kerathurus et le crabe bleu Callinectes sapidus des côtes de Galice (nord-est Atlantique). Deux crustacés décapodes inhabituels sont signalés pour la première fois sur les côtes de Galice (Nord-ouest Espagne). Un spécimen de caramote Penaeus kerathurus (Penaeidae) a été capturé dans la Ria de Arousa en 2014 et un spécimen de crabe bleu Callinectes sapidus (Portunidae) a été capturé dans la Ria de Vigo en 2015, la première est considérée comme une espèce indigène alors que la seconde est considérée comme exotique. Le réchauffement de l’océan provoquant un processus de tropicalisation pourrait favoriser l’arrivée d’espèces d’eaux chaudes à des latitudes tempérées ainsi que l’établissement d’espèces introduites.

Keywords: Caramote prawn l Penaeus kerathurus l Blue crab l Callinectes sapidus l Tropicalization l Non-indigenous

Introduction shelf and slope, including many species of economic importance (De Grave et al., 2009). Decapods, with 17635 morphologically described species, Galicia is a region located in north-western Spain, with are the most recognizable of all crustaceans and comprise a over 1200 km of coastline and an important fishery and dominant group of benthic invertebrates of the continental shellfishing sector, whose catches include commercially valuable decapod species such as Maja brachydactyla Balss, 1922, Necora puber (Linnaeus, 1767), Cancer Reçu le 20 janvier 2016 ; accepté après révision le 18 mai 2016. pagurus Linnaeus, 1758, Homarus gammarus (Linnaeus, Received 20 January 2016; accepted in revised form 18 May 2016. 1758), Palaemon serratus (Pennant, 1777), Palinurus 324 NEW DECAPODS FROM GALICIAN WATERS elephas (Fabricius, 1787) and Nephrops norvegicus Water temperature and salinity of the dates of the catches (Linnaeus, 1758). were taken from the nearest oceanographic buoy of Xunta The marine fauna of the coast of Galicia has undergone de Galicia: in the Plataforma Cortegada (42º37.54’N- important changes during the last decades due to the 08º47.03’W) at a mean depht of 5.5 m, for Penaeus amount of new species arrived as a consequence of kerathurus (Forskål, 1775), and in the Pilar de Rande oceanographic and anthropogenic factors. The northward (42º17.19’N-08º39.06’W) at surface, for Callinectes expansion of tropical species (tropicalization process) is sapidus Rathbun, 1896 (data available at http://www2. well documented in the area in mobile species such as meteogalicia.es). fishes (Bañón et al., 2014), but also in species with reduced movements such as intertidal gastropods (Rubal et al., Molecular identification 2013). Introduced exotic species from diverse taxonomic For confirmation of the identification of the specimen of P. groups have also been reported; and their establishment kerathurus a DNA barcode sequence, Cytochrome c could be favoured by changes in environmental conditions oxidase subunit I (Cox1), was obtained. Total genomic (meridionalization process) (Bañón, 2012). DNA was extracted from a sample of muscle tissue of the To date, crustacean decapods are not well known in the pleon following a modified Chelex 10% protocol by Estoup area, and only few studies provide a detailed list of species et al. (1996). Target mitochondrial DNA from Cox1 gen (González-Gurriarán & Méndez, 1986; Fariña et al., 1997), was amplified with polymerase chain reaction (PCR) using so the presence of new decapod species is not unusual. the following cycling conditions: 2 min at 95ºC, 40 cycles Recently, a total of eight species were reported for the first of 20s at 95ºC, 20s at 45-48ºC, 47s at 72ºC, and 5 min 72º time, including both native and exotic species (Cuesta et C. Primers COH6 (5´- TAD ACT TCD GGR TGD CCA al., 2016). Other exotic crustaceans include a few balanid AAR AAY CA -3´) and COL6b (5´- ACA AAT CAT AAA species (Macho et al., 2010) and the caprellid amphipod GAT ATY GG -3´) (Schubart & Huber, 2006) allowed Caprella mutica Schurin, 1935 (Almón et al., 2014). amplification of 667 bp of Cox1. PCR products were sent The aim of this study is to report two new records of a to Stab Vida Laboratories to be purified and then non-indigenous and a rare crustacean decapod species from bidirectionally sequenced. Galician waters, including molecular information of one of Both sequences (forward and reverse) were edited using them. the software Chromas version 2.0. The Cox1 sequence obtained was deposited in Genbank under accession Material and Methods number KU521539. A BLAST search was executed at the NCBI webpage to get the sequence that matched best.

Sampling Results The specimens were collected alive by local artisanal fishers during their habitual fishing operations, and then Penaeidae Rafinesque, 1815 preserved frozen for storage and subsequent analysis. Penaeus kerathurus (Forskål, 1775) Thereupon, specimens were transported to the laboratory (Fig. 1) and, after defrost, preserved and stored in ethanol (80%). Material All specimens were initially identified based on morphological characters and identification keys according 1 female, 192 mm TL, 40.8 mm CL, 21 mm CW (DNA to Dall et al. (1990), Pérez Farfante & Kensley (1997) and voucher, MHNUSC 25045), caught in a towing dredge Williams (1974), sexed and measured using a digital directed to the scallop Pecten maximus (Linnaeus, 1758) on calliper (TesaCalIP65). The following measurements were muddy sand at a depth of 10-12 m, near the port of Ferrazo, taken: cephalothorax length (CL), from the posterior Vilagarcía de Arousa, Ría de Arousa (42º35.57’N- margin of the orbit (shrimp) or from its frontal margin 8º47.25’W), on December 17, 2014 (Fig. 2). (crab) to the posterior margin of the cephalothorax, and Oceanographic data cephalothorax width (CW), the maximum width of cephalothorax. Total length (TL) was measured in the Temperature ranged from 13.41 to 13.75ºC (mean 13.59ºC) shrimp as the linear distance from the tip of the rostrum to and salinity fluctuated from 32.14 to 34 (mean 33.34). the posterior margin (end) of the telson. The preserved Remarks specimens were deposited at the Museo de Historia Natural da Universidade de Santiago de Compostela (MHNUSC, Demersal crustacean usually recorded at a depth of 0.5 to Santiago de Compostela, Spain). 90 m but commonly found between 5 and 50 m (d’Udekem R. BAÑÓN, J.A. CUESTA, B. ALMÓN, J. PÉREZ-DIESTE, J.E. TRIGO, M. BERTA RÍOS 325

d’Acoz, 1999). Its range includes the whole Eastern Atlantic seaboard from the South coast of England as far south as Angola, and throughout the Mediterranean Sea (Dore & Frimodt, 1987). However, its presence in Wales is discussed by some authors (Kemp, 1910). The Cox1 sequence has confirmed the identification of P. kerathurus. The 667 bp obtained in the present study fits 100% with the 661 bp Cox1 sequence of a P. kerathurus from the Portuguese coast (voucher JSDPX23-01) deposited in Genbank under the accession number JQ306154, and obtained by Matzen da Silva et al. (2011). It also fits 98-99% with several P. kerathurus sequences from different Atlantic and Mediterranean localities (from the Gulf of Guinea to Portugal, and from Turkey to Algeria).

Portunidae Rafinesque, 1815 Callinectes sapidus Rathbun, 1896 (Fig. 3) Figure 1. Penaeus kerathurus. Female, 192 mm TL, 40.8 mm CL, 21 mm CW (MHNUSC 25045), collected from Ría de Material Arousa, Galicia, Spain. Fresh specimen (top) and preserved specimen (bottom). 1 male, 63.4 mm CL, 141.2 mm CW (MHNUSC 25046), caught in a trap directed to velvet swimming crab Necora puber (Linnaeus, 1767) on muddy sand at a depth of 3 m

Figure 2. Map showing the study area and collecting localities: (1) Penaeus kerathurus; (2) Callinectes sapidus. 326 NEW DECAPODS FROM GALICIAN WATERS

but probably as early as 1935), Baltic Sea (1951), Black Sea (1967), and possibly in the Sea of Azov (1967) (Nehring, 2011). In the Iberian Peninsula, it was first reported in Lisbon, Portugal, in 1979 (Gaudencio & Guerra, 1979). Subsequent records were reported in the estuary of the Guadalquivir in 2002 (Cabal et al., 2006); in the Cantabrian Sea in 2004 (Cabal et al., 2006); Sado estuary in 2009 (Ribeiro & Verissimo, 2014), and in the Ebro delta in 2012 (Castejón & Guerao, 2013).

Discussion

The first records of marine species in unusual habitats may be an indicator of changes in the ecosystem linked to climate changes or human impacts in coastal environments (Streftaris et al., 2005; Arvedlund, 2009). The spread of tropical organisms together with seawater warming could explain the new arrival of southern species of tropical origin and the establishment of tropical exotic species, including alien species. The seawater temperature has increased in Galicia by 0.24ºC per decade since 1974 (Gómez-Gesteira et al., 2011) and there is a decrease in the extension and intensity of the upwelling season, responsible for the presence of colder coastal surface waters in summer (Álvarez-Salgado et al., 2008). There is scarce information about the distribution and abundance of P. kerathurus along the Atlantic European coast. According to literature, this species ranges in this area from the south of Great Britain to the Gibraltar strait (Dore & Frimodt, 1987). However, the normal northern Figure 3. Callinectes sapidus. Male, 63.4 mm CL and 141.2 boundary for penaeid distribution is about the mid-coast of mm CW (MHNUSC 25046), collected from Ría de Vigo, Galicia, Portugal (Dall et al., 1990) and their presence north of this Spain. Dorsal view (top) and ventral view (bottom). area is poorly reported and could be probably limited to some bays with special favourable conditions to support a limited number of individuals. In fact, only two penaeid off Canabal beach, Ría de Vigo (42º15.645’N- prawn species have been reported in the Atlantic European 08º45.500’W), on November 25, 2015 (Fig. 2). waters, the aforementioned P. kerathurus and the introduced species Penaeus japonicus (Spence Bate, 1888) Oceanographic data (Quigley et al., 2013), while 14 species were recorded in Temperature ranged from 15.68 to 16.84ºC (mean 16.33ºC) the warmest Mediterranean Sea, eight of them introduced and salinity fluctuated from 33.36 to 34.96 (mean 34.16). (Cruscanti et al., 2015). However, according to Tsoi et al. (2014), the introduced species in the Mediterranean and NE Remarks Atlantic could be P. pulchricaudatus Stebbing, 1914 rather than P. japonicus. It is interesting to note that this specimen Native to the western Atlantic, apparently with a disjunct was caught in winter with a sea temperature of about 13ºC, distribution pattern, with a northern population from the near the lower limit of temperature for this species, which United States and Canada (Nova Scotia, Maine, and range according to literature from about 10 to 30ºC northern Massachusett) to Venezuela, and a southern (Rodriguez, 1981). Similarly, Quigley et al. (2013) reported population from Bahia, Brazil, to (Williams, that 73% of the specimens of P. japonicus recorded in the 1984; Santos & D’Incao, 2004). Introduced out of its native NE Atlantic occurred during periods of lower water range in the eastern Atlantic in 1900, on the Atlantic coast temperatures due to inactivity, perhaps during hibernation, of France (Bouvier, 1901). Subsequently, specimens were and/or during their daytime burrowing behaviour. detected in the North Sea (1932), Mediterranean Sea (1949, The detailed invasion history of C. sapidus in European R. BAÑÓN, J.A. CUESTA, B. ALMÓN, J. PÉREZ-DIESTE, J.E. TRIGO, M. BERTA RÍOS 327 and adjacent waters is unknown, but transport in ballast de Cambados” staff, for providing the specimen and data of waters is considered the most probable initial vector P. kerathurus. Also thanks to the personnel of the UTPB (Nehring, 2011). Given the proximity to the port of Vigo, (Xunta de Galicia) for providing some of the data needed one of the most important shipping ports in Spain, ballast for the elaboration of this paper. We gratefully transport or ships’ hulls could be the pathway of acknowledge the assistance of the members of Grupo do introduction of this specimen. Although living specimens Estudo do Medio Mariño (GEMM). of C. sapidus were found in ballast tanks but none on ships’ hulls (Gollasch, 1996), the presence of two exotic crab References species, Panopeus africanus A. Milne-Edwards, 1867 and Pilumnopeus africanus (de Man, 1902), recently recorded Almón B., Pérez J., Bañón R. & Trigo J. 2014. First record of in the nearby Ría de Arousa and introduced by vessel hull Caprella mutica from the Iberian Peninsula: expansion fouling (Cuesta et al., 2016) gives also credence to this southwards in European waters. Marine Biodiversity Records, vector of introduction. 7: 1-4. 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