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  • 1.
    Calamnius, Linda
    et al.
    Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Biologi. Institute of Freshwater Research, Department of Aquatic Resources, Swedish University of Agricultural Sciences, Stockholm, Sweden.
    Lundin, Mikael
    Harmångers Machine & Marine, Stocka, Sweden; Department of Wildlife, Fish and Environmental studies, Swedish University of Agricultural Sciences, Umeå, Sweden.
    Fjälling, Arne
    Institute of Freshwater Research, Department of Aquatic Resources, Swedish University of Agricultural Sciences, Stockholm, Sweden.
    Königson, Sara
    Institute of Coastal Research, Department of Aquatic Resources, Swedish University of Agricultural Sciences, Lysekil, Sweden.
    Pontoon trap for salmon and trout equipped with a seal exclusion device catches larger salmons2018Inngår i: PLOS ONE, E-ISSN 1932-6203, Vol. 13, nr 7, artikkel-id e0201164Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The growing seal populations of the Baltic have led to more frequent interactions with coastal fisheries. The motivation for seals to interact with fishing gear is high. It provides high densities of fish. A successful means of mitigating the conflict is the pontoon trap. Seal visits here have been frequent. Seals have access to most parts of the trap system including the middle chamber, which is an overhead environment. Concerns have been raised about seals possible entanglement in this specific part of the trap. As a means of keeping seals from entering the middle chamber, two different Seal Exclusion Devices (SEDs) were tested. A diamond mesh SED and a square mesh SED, which was rotated 45. The aim was to compare the functionality of the different SEDs with respect to seal deterrent abilities and catch composition. The hypothesis tested were (i) that seals would not be able to enter the middle chamber, (ii) that the catch would increase and (iii) that the SED would deter larger fish from swimming into the middle chamber. Catch data and underwater film were collected. Larger salmons were caught in traps equipped with SEDs. The SEDs did not affect the number of caught fish or the total catch per soak day. © 2018 Calamnius et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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