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Ports are a key factor in the understanding and solving of most problems associated with marine invasive species across regional and global scales. Yet many regions with active ports remain understudied. The aim of this work was to (a) identify and quantify the marine fouling organisms in all Patagonian ports of Argentina classifying them as native, exotic or cryptogenic species through a rapid assessment survey and experimental studies, (b) survey the environmental and anthropogenic variables of these ports and (c) analyze and discuss these results in the light of the South America context for the study of marine invasive species, legislation and commerce. We found 247 fouling species, including 17 introduced, one of which is a new record for the region, and other 15 species currently considered cryptogenic species that will need further attention to clarify their status. The analysis of mobile and sessile taxa, together with the environmental variables measured in this study and the port movement, allow us to discuss individual ports' vulnerability to future introductions. This is the first large scale study performed for this region on this topic, and it will help in developing monitoring programs and early detection plans to minimize new species introductions along the marine coastline of southern South America., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

To assess the potential of domestic traffic for the regional spread of nonindigenous species (NIS), we surveyed the hull of an oceanographic vessel serving routes in the southwestern Atlantic and Southern Ocean. Sampling was performed while the vessel was in the water and in dry-dock in the Port of Mar del Plata, Argentina. We found 120 taxa belonging to 14 different invertebrate groups, including 53 species, 47 morphospecies, and 20 taxa identified at higher taxonomic levels. Ten of these species have not been reported for the Port of Mar del Plata and adjacent areas prior to the present study, and eight are new records for the entire Argentine coast. While both in-water and dry-dock sampling allowed for the detection of native, non-native, and cryptogenic fauna, more samples and species were obtained in dry-dock. Dry-dock richness estimates amounted to up to ~ 110 hull fouling species. Despite specific logistic challenges, dry-dock sampling should be considered by managers assessing vector strength due to its greater species detection power. The present results highlight the potential for domestic vessel spread of hull fouling marine NIS, and pinpoint likely future additions to the non-native fauna inventory in the southwestern Atlantic. [ABSTRACT FROM AUTHOR]