Naslov
The invasive blue crab Callinectes sapidus Rathbun, 1896 (Crustacea: Portunidae) across the eastern Adriatic Sea, Croatia: permanent resident or just provisional visitor?

Autori
Tutman, Pero ; Dulčić, Jakov ; Dragičević, Branko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th ESENIAS Workshop with Scientific Conference Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe / Trichkova, Teodora ; Tomov, Rumen ; Vladimirov, Vladimir ; Kalcheva, Hristina ; Vanev, Yuriy ; Uludağ, Ahmet ; Tyufekchiev, Violeta - Sofija : Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences (IBER-BAS) ; East and South European Network for Invasive Alien Species (ESENIAS, 2017, 129-129

ISBN
978-954-9746-42-6

Skup
7th ESENIAS Workshop with Scientific Conference Networking and regional cooperation towards Invasive Alien Species Prevention and Management in Europe

Mjesto i datum
Sofija, Bugarska, 28.03.2017. - 30.03.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
invasive crab, Croatian Adriatic coast, ecological impact, established populations, dispersal

Sažetak
The blue crab, Callinectes sapidus Rathbun, 1896 is euryhaline and eurythermal invasive species in Europe. It has widely invaded European Atlantic coasts and several areas of the Mediterranean, probably brought by ballast waters ; yet, it shows an unstable and unpredictable scenario across the Croatian coast. To understand its current invasion status, this study investigated population trends along the Croatian coast in order to estimate whether his occurrence is of established populations or just provisional. After the first record (Neretva River delta, 2004), it has been periodically, but rarely recorded across different regions of Croatian coast. Based on personal communications with the local fishermens, population in the Neretva River delta showed unstable trend intervals followed by rapid colonization and dispersal. There has increased since the first record (2004-2006), then decreased (2006-2008), raised again (2008-2010), and thereafter decreased (2011-2014). During abundant phase, local fishermen reports catches of 40-50 specimens in gillnet per night during July-September, with impact on both biodiversity and socioeconomics, as they decrease population of Carcinus aestuarii and tear their nets and damage the caught fish. The periodical high abundance and catch frequency, the occurrence of ovigerous females and juveniles, indicate evidence of an established population. However, other records were in distant areas and only anecdotal, making way of spreading fairly unclear. The present state along the Croatian coast, however, do not allow reliable comments to be made regarding whether or not it has established population elsewhere out of the Neretva River delta. In any case, the impact of a possibly successful colonization would, at least, represent a significant change in the composition of the native fauna. Further monitoring of this population and the potential dispersal would be of interest, in order to provide better information on its population structure and dynamics in Adriatic waters along the Croatian coast.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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