Blar i NINA Brage på forfatter "Lennox, Robert J."

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    • Behaviour and survival of wild Atlantic salmon Salmo salar captured and released while surveillance angling for escaped farmed salmon 

      Lennox, Robert J.; Havn, Torgeir Børresen; Thorstad, Eva Bonsak; Liberg, Egil; Cooke, Steven J.; Uglem, Ingebrigt (Journal article; Peer reviewed, 2017)
      In many Norwegian rivers, spawning stocks are surveyed for escaped farmed salmon with surveillance fishing by rod and reel after the recreational angling season. However, the benefits of surveillance fishing depend on the ...

    • Bioenergetic consequences of warming rivers to adult Atlantic salmon Salmo salar during their spawning migration 

      Lennox, Robert J.; Eliason, Erika J.; Havn, Torgeir Børresen; Johansen, Martin Rognli; Thorstad, Eva Bonsak; Cooke, Steven J.; Diserud, Ola Håvard; Whoriskey, Frederick G.; Farrell, Anthony P.; Uglem, Ingebrigt (Journal article; Peer reviewed, 2018)
      1. Climate change poses a challenge to wild fishes, yet little is known about the behavioural use and metabolic consequences of thermally heterogeneous water encountered by wild salmon during their energetically demanding ...

    • Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls 

      Lennox, Robert J.; Thorstad, Eva Bonsak; Diserud, Ola Håvard; Økland, Finn; Cooke, Steven J.; Aasestad, Ingar; Forseth, Torbjørn (Journal article; Peer reviewed, 2018)
      The spawning migration of Atlantic salmon has been characterized by tracking salmon carrying electronic tags as they ascend rivers, but still little is known about how natural obstacles such as waterfalls influence migratory ...

    • Does Catch-and-Release Angling Alter the Behavior and Fate of Adult Atlantic Salmon During Upriver Migration? 

      Lennox, Robert J.; Uglem, Ingebrigt; Cooke, Steven J.; Næsje, Tor; Whoriskey, Frederick G.; Havn, Torgeir Børresen; Ulvan, Eva Marita; Solem, Øyvind; Thorstad, Eva Bonsak (Journal article; Peer reviewed, 2015)
      To reproduce, Atlantic Salmon Salmo salar return to freshwater rivers and migrate upriver to spawning areas. This migration is the basis for recreational fisheries, which for conservation reasons are increasingly characterized ...

    • European eel Anguilla anguilla compromise speed for safety in the early marine spawning migration 

      Lennox, Robert J.; Økland, Finn; Mitamura, Hiromichi; Cooke, Steven J.; Thorstad, Eva Bonsak (Journal article; Peer reviewed, 2018)
      There are substantial benefits to potential fitness conferred to animals that undertake migrations. However, animals must make compromises to maximize survival and compensate for the risks associated with long-distance ...

    • Influence of gear switching on recapture of Atlantic salmon (Salmo salar) in catch-and- release fisheries 

      Lennox, Robert J.; Diserud, Ola Håvard; Cooke, Steven J.; Thorstad, Eva Bonsak; Whoriskey, Frederick G.; Solem, Øyvind; Havn, Torgeir Børresen; Uglem, Ingebrigt (Journal article; Peer reviewed, 2016)
      Anglers that release Atlantic salmon (Salmo salar) in recreational fisheries do so with the intention that the fish will survive and contribute to succeeding generations. In some instances, salmon that are released may be ...

    • Mortality of Atlantic salmon after catch and release angling: assessment of a recreational Atlantic salmon fishery in a changing climate 

      Van Leeuwen, Travis E.; Dempson, J. Brian; Burke, Chantelle M.; Kelly, Nicholas I.; Robertson, Martha J.; Lennox, Robert J.; Havn, Torgeir Børresen; Svenning, Martin; Hinks, Ross; Guzzo, Matthew M.; Thorstad, Eva Bonsak; Purchase, Craig F.; Bates, Amanda E. (Peer reviewed; Journal article, 2020)
      Human activities have the potential to accelerate population-level decline by contributing to climate warming and decreasing the capacity of species to survive warming temperatures. Here we build a predictive model to test ...

    • One Hundred Pressing Questions on the Future of Global Fish Migration Science, Conservation, and Policy 

      Lennox, Robert J.; Paukert, Craig P.; Aarestrup, Kim; Auger-Méthé, Marie; Baumgartner, Lee; Birnie-Gauvin, Kim; Bøe, Kristin; Brink, Kerry; Brownscombe, Jacob W.; Chen, Yushun; Davidsen, Jan Grimsrud; Eliason, Erika J.; Filous, Alexander; Gillanders, Bronwyn M.; Helland, Ingeborg Palm; Horodysky, Andrij Z.; Januchowski-Hartley, Stephanie R.; Lowerre-Barbieri, Susan K.; Lucas, Martyn C.; Martins, Eduardo G.; Murchie, Karen J.; Pompeu, Paulo S.; Power, Michael; Raghavan, Rajeev; Rahel, Frank J.; Secor, David; Thiem, Jason D.; Thorstad, Eva Bonsak; Ueda, Hiroshi; Whoriskey, Frederick G.; Cooke, Steven J. (Journal article; Peer reviewed, 2019)
      Migration is a widespread but highly diverse component of many animal life histories. Fish migrate throughout the world’s oceans, within lakes and rivers, and between the two realms, transporting matter, energy, and other ...

    • Predation research with electronic tagging 

      Lennox, Robert J.; Dahlmo, Lotte Svengård; Ford, Adam T.; Sortland, Lene K.; Vogel, Emma; Vollset, Knut Wiik (Peer reviewed; Journal article, 2022)
      Predation is a fundamental aspect of ecology that drives ecosystem structure and function. A better understanding of predation can be facilitated by using electronic tags that log or transmit positions of predator or prey ...

    • Systematic review and meta-analysis of PIT tagging effects on mortality and growth of juvenile salmonids 

      Vollset, Knut; Lennox, Robert J.; Thorstad, Eva Bonsak; Auer, Samuel; Bär, Kerstin; Larsen, Martin H.; Mahlum, Shad Kenneth; Näslund, Joacim; Stryhn, Henrik; Dohoo, Ian (Peer reviewed; Journal article, 2020)
      A systematic review and meta-analysis was conducted to evaluate the appropriate tag:fish size ratio when tagging juvenile salmonids (genera Oncorhynchus, Salmo, and Salvelinus). The review yielded 18 publications with 211 ...

    • The risk of individual fish being captured multiple times in a catch and release fishery 

      Thorstad, Eva B.; Diserud, Ola Håvard; Solem, Øyvind; Havn, Torgeir Børresen; Bjørum, Lars Rasmus Oftedal; Kristensen, Torstein; Urke, Henning Andre; Johansen, Martin Rognli; Lennox, Robert J.; Fiske, Peder; Uglem, Ingebrigt (Peer reviewed; Journal article, 2019)
      The proportion of angled Atlantic salmon Salmo salar L. being caught and released has increased. If individuals are repeatedly captured, this may have fish welfare consequences. Of 995 Atlantic salmon tagged during catch ...

    • Use of simulation approaches to evaluate the consequences of catch-and-release angling on the migration behaviour of adult Atlantic salmon (Salmo salar) 

      Lennox, Robert J.; Cooke, Steven J.; Diserud, Ola Håvard; Havn, Torgeir Børresen; Johansen, Martin R.; Thorstad, Eva Bonsak; Whoriskey, Frederick G.; Uglem, Ingebrigt (Journal article; Peer reviewed, 2016)
      Given most Atlantic salmon (Salmo salar) released by anglers survive (proportion = 0.97 in this study), eco-nomically and culturally important recreational Atlantic salmon fisheries are increasingly incorporatingcatch-and-release. ...