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Involvement of recreational anglers in the eradication of alien brook trout from high altitude lakes

Tiberti, Rocco
; 
Ottino, Michelle
; 
Brighenti, Stefano
; 
Iacobuzio, Rocco
; 
Rolla, Matteo
; 
von Hardenberg, Achaz
; 
Bassano, Bruno
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Affiliation
Gran Paradiso National Park, University of Pavia, Università degli studi di Trento, Fondazione E. Mach, Università degli Studi di Milano, Swansea University, University of Chester
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2017
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Biological Sciences
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Abstract
Stocking programmes for recreational angling are primarily responsible for the spread and ecological impact of introduced sh in high-altitude, originally shless lakes. In 2013, the Gran Paradiso National Park started an eradication campaign of brook trout by intensive gill-netting. Local anglers were invited to attend two angling sessions to start the eradication before gill-netting in an experimental lake, as part of an education action devoted to these critical stakeholders. The angling sessions turned out to be a valuable help for the eradication campaign and the aim of this study is to report on the outcomes of these angling sessions. Angling techniques were highly size-selective, removing a substantial part of the adult population and of the sh biomass, but their contribution to the eradication of small sh (<15cm) was irrelevant. Therefore, angling cannot completely eradicate age-structured populations. However, there is scope to use angling sessions as a support for eradication campaigns and as an emergency measure for recent sh introduc- tions. Similar actions should be considered whenever a sh eradication programme is planned. These ndings, however, do not imply a general endorsement for angling within protected areas.
Citation
Tiberti, R., Ottino, M., Brighenti, S., Iacobuzio, R., Rolla, M., Von Hardenberg, A., & Bassano, B. (2017). Involvement of recreational anglers in the eradication of alien brook trout from high altitude lakes. Journal of Mountain Ecology, 10, 13-26.
Publisher
Gran Paradiso National Park Agency
Journal
Journal of Mountain Ecology
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http://hdl.handle.net/10034/621074
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Article
Language
en
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1590-3907
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http://mountainecology.org/index.php/me/article/view/209
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