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The aim of this study was to analyze freshwater anglers\u2019 actions and perceptions regarding fish introductions, comparing two distinct situations, one with recently arrived non-natives fishes and another with older fish introductions, using the Iberian Peninsula as a case study. To achieve this goal, a bilingual survey was implemented on-line in Portugal and Spain and in person (direct inquiries) in two Iberian regions: Lower Ebro (older fish introductions) in Spain; and Lower Tagus (recent fish introductions) in Portugal. Results showed spatial differences in perceptions and actions, namely about the target species, awareness of the impact of non-native fishes, fish introductions reported and proportion of anglers that wanted new fish species. In the Ebro river there is a high percentage of foreign anglers, higher awareness of fish introduction impact and lower introduction rates reported than in the Tagus river. However, popularity of non-native species like European catfish, was higher in the Ebro. In general, although risk behaviors such as use of fish as life bait was of low prevalence for both countries (approx. 5%), it corresponds to large numbers of fish being introduced. Our conservative estimates revealed 273,600 events of bait discharge per year. Regarding the intentional introductions, we estimated a total of 140,000 intentional introduction (illegal) events per year. These findings may help to improve monitoring, awareness and fisheries management programs led by governmental agencies.<\/jats:p>\n                <jats:p><jats:bold>Graphical abstract<\/jats:bold><\/jats:p>","DOI":"10.1007\/s11160-023-09819-x","type":"journal-article","created":{"date-parts":[[2023,12,6]],"date-time":"2023-12-06T13:07:21Z","timestamp":1701868041000},"page":"385-404","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Angler\u2019s preferences, perceptions and practices regarding non-native freshwater fish"],"prefix":"10.1007","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7963-3497","authenticated-orcid":false,"given":"F.","family":"Banha","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3893-5920","authenticated-orcid":false,"given":"J.","family":"Gago","sequence":"additional","affiliation":[]},{"given":"D.","family":"Margalejo","sequence":"additional","affiliation":[]},{"given":"J.","family":"Feij\u00e3o","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7751-2528","authenticated-orcid":false,"given":"F.","family":"Casals","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1808-3847","authenticated-orcid":false,"given":"P. 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