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Conference Agenda

Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Please note that all times are shown in the time zone of the conference. The current conference time is: 10th Sept 2026, 07:06:14pm CEST (Norway)

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Daily Overview

Session

Managing environmental threats
Location: Auditorium D: Anna Mette Pagaard Fuglseth
Session Chair: Adrian Anthony Lopes, American University of Sharjah

Presentation 1

Effects of the invasive round goby on Swedish recreational fishing values

Göran Kjell Bostedt¹, Ola Carlén², Rahmat Naddafi³, Ann-Britt Florin³

1: Centre for Environmental and Resource Economics, CERE, Umeå School of Business and Economics, Umeå University, SE90187 Umeå, Department of Forest Economics, Swedish University of Agricultural Sciences (SLU), and Department of Business Administration, Technology and Social Sciences, Luleå University of Technology; 2: Umeå School of Business and Economics, Umeå University, SE90187 Umeå; 3: Department of Aquatic Resources, Swedish University of Agricultural Sciences (SLU)

Discussant: Adam Lampert (The Hebrew University)

The round goby, an invasive fish, have spread to Swedish waters from the Black and Caspian Seas. We investigate the effects on opportunities for future recreational fishery in Sweden. Data comes from a recreational fishing survey targeting the Swedish population. Effects of the round goby on other fish species was modelled as a function of its population and environmental factors. Values attached to recreational fishing were estimated using a travel cost approach. To estimate effect on recreational fishing catch and changes in consumer surplus from increase in the round goby population, an ex-ante situation is compared with an “ex post” situation. Overall impacts of the round goby on recreational fishing in Swedish waters are clearly negative. In terms of consumer surplus, an unchecked population increase of the round goby in Swedish waters will cause a negative effect of SEK 379 million, or about EUR 33 million, in present value terms.