Causes and consequences of invasions of aquatic ecosystems by non-native salmonids
Ecology and Biodiversity of Animals and Ecosystems, Organismic Interactions
Final Report Abstract
Salmonids (salmon and trout family) are highly valuable and have been translocated widely outside their native range since the 19th century. Ecological conditions, as well as history and culture, vary considerably within Europe, which has affected the current invasion potential for non-native salmonids. SalmoInvade is a research project within the BiodivERsA-network including scientists and stakeholders from Sweden, Norway, Germany, France and Canada. The project uses a multidisciplinary approach to evaluate the consequences of salmonid invasions in Europe and provide recommendations for their management. Biological studies: Global meta-analyses and experiments show that native salmonids can be adversely affected both by non-native populations and non-native species, sometimes with cascading effects on stream ecosystems. Furthermore, angling can be targeted to remove bold individuals in an invasive population. Social studies: Analyses of the governance systems for fisheries in the five countries showed considerable cross-national differences in how the establishment of non-native salmonids through stocking is managed. Furthermore, surveys on the public perception of biological invasions in Europe, as well as among stocking decisions makers in France and Germany, revealed considerable cross-national differences in how non-native and native salmonids are valued, and how contextual factors influence local stocking decisions. Policy implications: (1) Strict guidelines for stocking and transfer of non-native salmonids should be implemented. (2) Monitoring and reporting should be improved. (3) Local decision-makers and authorities should be empowered to enforce regulations and to evaluate practices for salmonid stocking. (4) In order to conserve Salmonid biodiversity in Europe, it is important to consider the variation in public perception of native salmonids, and to (5) improve science - policy - public cooperation and dialogue.
Publications
- (2017) Participatory adaptive management leads to environmental learning outcomes extending beyond the sphere of science. Science Advances 3 (6) e1602516
Fujitani, M., McFall, A., Randler, C. & Arlinghaus, R.
(See online at https://dx.doi.org/10.1126%2Fsciadv.1602516) - (2017) What determines the behavioral intention of local-level fisheries managers to alter fish stocking practices in freshwater recreational fisheries of two European countries?. Fisheries Research 194 173-187
Riepe, Carsten; Fujitani, Marie; Cucherousset, Julien; Pagel, Thilo; Buoro, Mathieu; Santoul, Frédéric; Lassus, Rémy; Arlinghaus, Robert
(See online at https://dx.doi.org/10.1016/j.fishres.2017.06.001) - (2018) Salmonid stocking in five North Atlantic jurisdictions: Identifying drivers and barriers to policy change. Aquatic Conserv: Mar Freshw Ecosyst (Aquatic Conservation: Marine and Freshwater Ecosystems) 28 (6) 1451–1464
Aas, Øystein; Cucherousset, Julien; Fleming, Ian A.; Wolter, Christian; Höjesjö, Johan; Buoro, Mathieu; Santoul, Frederic; Johnsson, Jörgen I.; Hindar, Kjetil; Arlinghaus, Robert
(See online at https://doi.org/10.1002/aqc.2984) - (2019) Managing River Fish Biodiversity Generates Substantial Economic Benefits in Four European Countries. Environmental management 63 (6) 759–776
Riepe, Carsten; Meyerhoff, Jürgen; Fujitani, Marie; Aas, Øystein; Radinger, Johannes; Kochalski, Sophia; Arlinghaus, Robert
(See online at https://doi.org/10.1007/s00267-019-01160-z) - 2014. Species-specific preferences of German recreational anglers for freshwater fishing experiences, with emphasis on theintrinsic utilities of fish stocking and wild fishes. Journal of Fish Biology, 85: 1843-1867
Arlinghaus, R., Beardmore, B., Riepe, C., Meyerhoff, J., Pagel, T.
(See online at https://doi.org/10.1111/jfb.12546) - 2016. Global Salmonidae introductions reveal stronger ecological effects of changing intraspecific compared to interspecific diversity. Ecology Letters. 19: 1363–1371
Buoro M., Olden J.D. & Cucherousset J.
(See online at https://doi.org/10.1111/ele.12673) - 2017. Co-existence with non-native brook trout breaks down the integration of phenotypic traits in brown trout parr. Functional Ecology
Závorka, L., Koeck, B., Cucherousset, J., Brijs, J., Näslund, J., Aldvén, D., Höjesjö, J., Fleming, I. A. & Johnsson, J. I.
(See online at https://doi.org/10.1111/1365-2435.12862) - 2017. Global test of Eltonian niche conservatism of non-native freshwater fish species between their native and introduced ranges. Ecography 40: 384-392
Comte L., Cucherousset J. & Olden J.D.
(See online at https://doi.org/10.1111/ecog.02007) - (2019): Angling selects against active and stress-resilient phenotypes in rainbow trout. In: Can. J. Fish. Aquat. Sci. 76 (2), S. 320–333
Koeck B., Zavorka L., Aldven D., Näslund J., Arlinghaus R., Thörnqvist P.-O., Winberg S., Björnsson B. T. & Johnsson J. I.
(See online at https://doi.org/10.1139/cjfas-2018-0085)
