February 1st to 5th 2016
Olhão, Portugal
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Antipode marine fauna invasions in ports: a pilot survey in North Iberia.

Scientific Exhibition
Biological Invasions
Thursday, February 4, 2016 -
17:30 to 19:30

Miralles, L. 1 Zaiko, A. 2 Borrell, Y.J. 3 Arias, A. 4 Roca, A. 5 Lopez, B. 6 Hernandez de Rojas, A. 7 Ardura, A. 8 García-Vázquez, E. 9

1University of Oviedo
2Cawthron Institute
3University of Oviedo
4University of Oviedo
5University of Oviedo
6University of Oviedo
7Spanish Institute of Oceanography
8University of Oviedo
9University of Oviedo

Ports are gateways for many marine organisms transported by ships worldwide. In any port, the origin of non-indigenous organisms would expectedly reflect the major marine routes operating in the region. The longest travel that a marine organism can accidentally undertake corresponds to Antipode transfers by ships. However, for unintentionally transported organisms, the survival and consequently the number of viable propagules transported from the source ecosystem and released into a new ecosystem should negatively correlate with the distance from the donor area. In this study carried out in North Iberian ports (Cantabrian Sea, Bay of Biscay) we have observed a high proportion of Antipode invertebrate species, and some of them (Xenostrobus securis and Ficopomatus enigmaticus) exhibited clear signs of invasiveness. Based on the phylogenetic screening, introductions from multiple source populations (including the native one in Oceania) are suspected. Similar environmental conditions in temperate antipode regions, as well as selection for wider tolerance ranges during the long and ordeal travel, may explain these results. More insight on the propagule survival on the transport vector and possible mechanisms of adaptation is desirable for a better pathway management.

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