EASIN - European Alien Species Information Network

Stelios Katsanevakis
4/30/2014 - 3:35 PM

Thread Opening Text:
There is the necessity to homogenize the whole catalogue. As an example, under A (Alien) we have both sure aliens (e.g. Lessepsian, or acquaculture) and potential aliens (e.g. Rachycentron canadum). This species occurs both in the Eastern Atlantic (Morocco to South Africa) and the Indo-West Pacific (see http://www.fishbase.org/summary/3542). Even if the only two Mediterranean records of this taxon occurred along the Eastern shores (and the authors speculated about its possible arrival from the Red Sea), there are no certainties regarding its introduction from the Red Sea (e.g. no molecular studies, as an example). Therefore, an Atlantic introduction due to natural dispersal cannot be ruled out up to sound data. May be it would be better to list it as we previously suggested for Aplysia dactylomela (= alien status questionable)?

This is more or less the same as previously done for Thalamita poissonii. This species occurs both in the E Atlantic and in the Indo-Pacific, and even if early Mediterranean records occurred along the Eastern shores, we cannot be sure about its alien status (or not), and therefore it had been listed as cryptogenic. However, for these species the use of cryptogenic may be presumably not correct (see discussion under Aplysia dactylomela), so that we would suggest again "questionable"...

Argyro ZENETOS
5/6/2014 - 1:34 PM

indeed! but the second recent record in the eastern Mediterranean (Turkish cost) [Akyol O. & Unal V, 2013. Second record of the cobia, Rachycentron canadum (Actinopterygii: Perciformes: Rachycentridae), from the Mediterranean Sea. Acta Ichthyologica et Piscatoria 43(4): 315–317]
implies rather an introduction via the Suez Canal. 

I would agree to change the pathway to unknown, status of the species questionable due to lack of sufficient info

Fabio CROCETTA
5/7/2014 - 10:56 AM

Then, if we move as "questionable" species whose alien status is still unknown (or questionable), we should use a new terminology to replace the use of questionable for species whose ID is not certain or whose record may be false...let's think about it...

Argyro ZENETOS
4/3/2015 - 12:50 PM

<blockquote>Then, if we move as "questionable" species whose alien status is still unknown (or questionable), we should use a new terminology to replace the use of questionable for species whose ID is not certain or whose record may be false...let's think about it...</blockquote>
 Please change the status to casual

Eugenio GERVASINI
11/19/2015 - 2:44 PM

Status of the species in the Catalogue changed to Cryptogenic.

Stelios Katsanevakis
11/19/2015 - 2:44 PM

Thread Closing Text:
Status of the species in the Catalogue changed to Cryptogenic.

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