Event Title

Session E8: A Decision Analysis to Guide the Use of Barriers and Fishways for Sea Lamprey Control in the Laurentian Great Lakes

Location

Groningen, The Netherlands

Event Website

http://fishpassage.umass.edu/

Start Date

24-6-2015 2:00 PM

End Date

24-6-2015 2:15 PM

Description

Abstract:

Decision analysis was carried out to assess barrier and fishway options used to control Sea Lamprey (Petromyzon marinus) in the Laurentian Great Lakes. Tensions between use of in-stream barriers to control sea lamprey, and dam removal and provisioning of fishways to reduce habitat fragmentation of native fishes, are arising over a broad geographic scale of ecological and economic significance. Management objectives, barrier and fishway options, and key uncertainties influencing the expected performance of the options were specified in workshops with resource managers. Data syntheses and mathematical models were conducted to project proportional changes in population growth rates of sea lamprey and migratory non-target fishes for each option. Over a variety of circumstances, a permanent barrier with a trap-and-sort fishway best balanced sea lamprey control and non-target effects, but other options ranked higher in specific circumstances. Performance of the management options was sensitive to how fishery managers weight sea lamprey control versus nontarget effects. Adaptive management could be used to reduce uncertainty in the performance of different barrier and fishway options.

Comments

Presenting Author Bio: I hold a Partnership in Ecosystem Research and Management Scientist position created between the University of Guelph and the Great Lakes Fishery Commission, a binational agency supporting fisheries management in the Laurentian Great Lakes. My research examines how the behaviour of individual animals affects the biology of populations, communities, and biodiversity, and applies this knowledge to assist fisheries managers. Ongoing research themes include (i) resolving trade-offs between enhancing and reducing connectivity for native and invasive fishes at multiple spatial and conceptual scales; (ii) using behavioural concepts to improve trapping success and control of invasive species; (iii) testing the role of behaviour in the development and evolution of population divergence in fishes, e.g., resource polymorphism and partial migration; and, (iv) understanding mechanisms behind the resilience of stream fish assemblages in agricultural landscapes.

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Jun 24th, 2:00 PM Jun 24th, 2:15 PM

Session E8: A Decision Analysis to Guide the Use of Barriers and Fishways for Sea Lamprey Control in the Laurentian Great Lakes

Groningen, The Netherlands

Abstract:

Decision analysis was carried out to assess barrier and fishway options used to control Sea Lamprey (Petromyzon marinus) in the Laurentian Great Lakes. Tensions between use of in-stream barriers to control sea lamprey, and dam removal and provisioning of fishways to reduce habitat fragmentation of native fishes, are arising over a broad geographic scale of ecological and economic significance. Management objectives, barrier and fishway options, and key uncertainties influencing the expected performance of the options were specified in workshops with resource managers. Data syntheses and mathematical models were conducted to project proportional changes in population growth rates of sea lamprey and migratory non-target fishes for each option. Over a variety of circumstances, a permanent barrier with a trap-and-sort fishway best balanced sea lamprey control and non-target effects, but other options ranked higher in specific circumstances. Performance of the management options was sensitive to how fishery managers weight sea lamprey control versus nontarget effects. Adaptive management could be used to reduce uncertainty in the performance of different barrier and fishway options.

https://scholarworks.umass.edu/fishpassage_conference/2015/June24/47