First record of Styela clava (Tunicata, Ascidiacea) in the Mediterranean region

Davis, M. H.; Davis, Mary E.

doi:10.3391/ai.2008.3.2.2

Cited by 24 publications

(13 citation statements)

References 14 publications

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“…Of them, Styela clava is classified among the top worst invasive IAS in Europe (EEA, 2007b). The proximity of commercial shell fisheries to the discovered populations in S. France, and the absence of S. clava from other harbours and marinas along the coast, suggests that the species may have been introduced by shellfish transfer (DAVIS & DAVIS, 2008 …”

Section: Zoobenthos /Miscellaneamentioning

confidence: 99%

Additions to the annotated list of marine alien biota in the Mediterranean with special emphasis on Foraminifera and Parasites

Zenetos

Merıç²,

Verlaque³

et al. 2008

Medit. Mar. Sci.

107

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The present work is an update of the annotated list (ZENETOS et al., 2006) based on literature up to April 2008. Emphasis is given to ecofunctional/taxonomic groups poorly addressed in the annotated list, such as the foraminiferan and parasites, while macrophytes are critically reviewed following the CIESM Atlas (VERLAQUE et al., in press). Moreover, in this update the bio-geographic area addressed includes the Sea of Marmara.The update yields a further 175 alien species in the Mediterranean bringing the total to 903. As evidenced by recent findings, more and more previously known ‘casual’ aliens, are becoming established. Approximately 100 more species have become well established in the region, raising the number of established species to 496 versus 385 until 2005. In the period from January 2006 to April 2008 more than 80 published papers have resulted in the recording of 94 new aliens, which is interpreted as a new introduction every 9 days, a rate beyond the worst scenario.

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Section: Zoobenthos /Miscellaneamentioning

confidence: 99%

Additions to the annotated list of marine alien biota in the Mediterranean with special emphasis on Foraminifera and Parasites

Zenetos

Merıç²,

Verlaque³

et al. 2008

Medit. Mar. Sci.

107

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“…A recent immigrant, Styela clava, among the worst invasives in Europe, has been accidentally transported into the Western Mediterranean by shellfish transfer (DAVIS & DAVIS, 2008). Styela clava, a solitary, hermaphroditic ascidian, is considered to be an aggressive invader throughout the world; this species is a major pest to the mussel farming industry of Canada (ARSENAULT et al, 2009).…”

Section: Miscellaneous Invertebratesmentioning

confidence: 99%

Alien species in the Mediterranean Sea by 2010. A contribution to the application of European Union’s Marine Strategy Framework Directive (MSFD). Part I. Spatial distribution

Zenetos

Gofas

Verlaque³

et al. 2010

Medit. Mar. Sci.

495

444

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The state-of-art on alien species in the Mediterranean Sea is presented, making distinctions among the four subregions defined in the EU Marine Strategy Framework Directive: (i) the Western Mediterranean Sea (WMED); (ii) the Central Mediterranean Sea (CMED); (iii) the Adriatic Sea (ADRIA); and (iv) the Eastern Mediterranean Sea (EMED). The updated checklist (December 2010) of marine alien species within each subregion, along with their acclimatization status and origin, is provided. A total of 955 alien species is known in the Mediterranean, the vast majority of them having being introduced in the EMED (718), less in the WMED (328) and CMED (267) and least in the Adriatic (171). Of these, 535 species (56%) are established in at least one area.Despite the collective effort of experts who attempted in this work, the number of introduced species remains probably underestimated. Excluding microalgae, for which knowledge is still insufficient, aliens have increased the total species richness of the Mediterranean Sea by 5.9%. This figure should not be directly read as an indication of higher biodiversity, as spreading of so many aliens within the basin is possibly causing biotic homogenization. Thermophilic species, i.e. Indo-Pacific, Indian Ocean, Red Sea, Tropical Atlantic, Tropical Pacific, and circum(sub)tropical, account for 88.4% of the introduced species in the EMED, 72.8% in the CMED, 59.3% in the WMED and 56.1% in the Adriatic. Cold water species, i.e. circumboreal, N Atlantic, and N Pacific, make up a small percentage of the introduced species, ranging between 4.2% and 21.6% and being more numerous in the Adriatic and less so in the EMED.Species that are classified as invasive or potentially invasive are 134 in the whole of the Mediterranean: 108 are present in the EMED, 76 in the CMED, 53 in the Adriatic and 64 in the WMED. The WMED hosts most invasive macrophytes, whereas the EMED has the lion’s share in polychaetes, crustaceans, molluscs and fish.

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“…This species has been introduced to different parts of the world’s oceans, including the east Atlantic coast (see Minchin et al 2006), Australia (Hewitt et al 1999), New Zealand (Davis and Davis 2006), both coasts of North America (Osman et al 1989; Lambert and Lambert 1998; Lambert 2003; Wonham and Carlton 2005), Mediterranean Sea (Davis and Davis 2008) and the Black Sea (Micu and Micu 2004). As Davis and Davis (2008) summarized, there are two possible mechanisms of ascidian introduction; shellfish transportation (juvenile ascidians) or via ship’s hulls and sea chests (mature ascidians) (Coutts and Dodgshun 2007).…”

Section: Resultsmentioning

confidence: 99%

“…As Davis and Davis (2008) summarized, there are two possible mechanisms of ascidian introduction; shellfish transportation (juvenile ascidians) or via ship’s hulls and sea chests (mature ascidians) (Coutts and Dodgshun 2007). As there is no shellfish farming in the Sea of Marmara, the only possible vector for the introduction of this species to the area was via shipping.…”

Section: Resultsmentioning

confidence: 99%

“…It is mainly characterized by its tunic shape and long stalk. This species was first reported in the Mediterranean Sea in June 2005, in Bassin de Thau (France) and was thought to have been transferred to the area by shellfish transfer (Davis and Davis 2008). This species was also recorded in the Black Sea in a species list of the macro-zoobenthos associated with a mussel facies inside the Constanta Sud-Agigea Seaport situated on the coast of Romania (Micu and Micu 2004).…”

Section: Introductionmentioning

confidence: 99%

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The alien ascidian Styela clava now invading the Sea of Marmara (Tunicata: Ascidiacea)

Çınar¹

2016

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During the implementation of a large project aimed to investigate the benthic community structures of the Sea of Marmara, specimens of the invasive ascidian species Styela clava were collected on natural substrata (rocks) at 10 m depth at one locality (Karamürsel) in İzmit Bay. The specimens were mature, containing gametes, indicating that the species had become established in the area. The Sea of Marmara seems to provide suitable conditions for this species to survive and form proliferating populations.

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First record of Styela clava (Tunicata, Ascidiacea) in the Mediterranean region

Cited by 24 publications

References 14 publications

Additions to the annotated list of marine alien biota in the Mediterranean with special emphasis on Foraminifera and Parasites

Additions to the annotated list of marine alien biota in the Mediterranean with special emphasis on Foraminifera and Parasites

Alien species in the Mediterranean Sea by 2010. A contribution to the application of European Union’s Marine Strategy Framework Directive (MSFD). Part I. Spatial distribution

The alien ascidian Styela clava now invading the Sea of Marmara (Tunicata: Ascidiacea)

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