Blar i Brage på forfatter "L’Abée-Lund, Jan Henning"
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10 års erfaring med nasjonale laksevassdrag –virker systemet?
L’Abée-Lund, Jan Henning; Skurdal, Jostein; Vøllestad, Leif Asbjørn (Journal article, 2018)Det er >600 lakseførende vassdrag i Norge; 52 nasjonale laksevassdrag og 29 laksefjorder ble opprettet for å gi utvalgte laksebestander bedre beskyttelse. Ordningen omfatter ca. 75 prosent av den norske villaksressursen, ... -
Basin-scale phenology and effects of climate variability on global timing of initial seaward migration of Atlantic salmon (Salmo salar)
Otero, Jaime; L’Abée-Lund, Jan Henning; Castro-Santos, Theodore; Leonardsson, Kjell; Storvik, Geir O.; Johnsson, Bror; Dempson, J. Brian; Russell, Ian; Jensen, Arne Johan; Baglinière, Jean-Luc; Dionne, Mélanie; Armstrong, John Duncan; Romakkaniemi, Atso; Letcher, Benjamin Havens; Kovic, John F.; Erkinaro, Jaakko; Poole, Russell; Rogan, Ger; Lundqvist, Hans; MacLean, Julian C.; Jokikokko, E.; Arnekleiv, Jo Vegar; Kennedy, Richard; Niemelä, Eero; Javierre, P. Caballero; Music, Paul A.; Antonsson, Thorolfur; Gudjonsson, Sigurdur; Veselov, Alexey; Lamberg, Anders; Groom, Steve; Taylor, Benjamin; Taberner, M.; Dillane, Mary; Arnason, Fridthjofur; Horton, Gregg; Hvidsten, Nils A.; Jonsson, Ingi Runar; Jonsson, Nina; Mckelvey, Simon; Næsje, Tor Fredrik; Skaala, Oystein; Smith, Gordon W.; Sægrov, Harald; Stenseth, Nils Chr.; Vøllestad, Leif Asbjørn (Journal article, 2014)Migrations between different habitats are key events in the lives of many organisms. Such movements involve annually recurring travel over long distances usually triggered by seasonal changes in the environment. Often, the ... -
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers
Otero, Jaime; Jensen, Arne J.; L’Abée-Lund, Jan Henning; Stenseth, Nils Chr.; Storvik, Geir O.; Vøllestad, Leif Asbjørn (Journal article, 2012)Atlantic salmon populations are reported to be declining throughout its range, raising major management concerns. Variation in adult fish abundance may be due to variation in survival, growth, and timing of life history ... -
Disentangling local from macroenvironmental effects: Quantifying the effect of human encroachments based on historical river catches of anadromous salmonids
L’Abée-Lund, Jan Henning; Haugen, Thrond; Vøllestad, Leif Asbjørn (Journal article, 2006)In this paper, we use dynamic factor and intervention analysis to identify and quantify the effect of human encroachments on anadromous salmonid catches in 22 Norwegian rivers over a 128-year period. In particular, we ... -
Divergent trends in anadromous salmonid populations in Norwegian and Scottish rivers
Vøllestad, Leif Asbjørn; Hirst, David; L’Abée-Lund, Jan Henning; Armstrong, John Duncan; MacLean, Julian C.; Youngston, Alan F.; Stenseth, Nils Chr. (Journal article, 2009)The Atlantic salmon (Salmo salar) is a charismatic anadromous fish of high conservation and economic value. Concerns have been expressed regarding the long-term viability of fisheries throughout the species’s distributional ... -
Effects of water discharge and temperature on the seaward migration of anadromous brown trout, Salmo trutta, smolts
Hembre, B.; Arnekleiv, J.V.; L’Abée-Lund, Jan Henning (Journal article, 2001)The smolt run of anadromous brown trout (Sulmo trutta) in a Norwegian river was studied for three consecutive years. The main run occurred in a period of 7–10 days in the middle or second half of May. Support was found for ... -
An experimental test of the genetic component of the ontogenetic habitat shift in Arctic charr (Salvelinus alpinus)
Langeland, A.; L’Abée-Lund, Jan Henning (Journal article, 1998)Fry of the Arctic charr, Salvelinus alpinus, were experimentally stocked into a small fish-free lake to test the hypothesis that the size-dependent habitat shift from the epibenthic to the pelagic habitat is genetically ... -
Ferskvannsressurser og fiskeoppdrett
L’Abée-Lund, Jan Henning; Sneve, Torbjørn (Journal article, 2000)Fiskeoppdrett i storskala er blitt en viktig næring i Norge. Omfanget av små fiskeoppdrettsanlegg har mer lokal interesse selvom de anses å kunne være en viktig binæring i distriktene. Disse må imidlertid også behandles ... -
Geographic variation and temporal trends in ice phenology in Norwegian lakes over a century
L’Abée-Lund, Jan Henning; Vøllestad, Leif Asbjørn; Brittain, John Edward; Kvambekk, Ånund Sigurd; Solvang, Tord (Journal article, 2020)Observations from 1890 to 2020 of ice phenology for 101 Norwegian lakes were used to detect variation in ice phenology. The average date of ice break-up occurred later in spring with increasing altitude, latitude and ... -
Location Is Everything, but Climate Gets a Share: Analyzing Small-Scale Environmental Influences on Breeding Success in the White-Throated Dipper
Nilsson, Anna L. K.; Reitan, Trond; Skaugen, Thomas; L’Abée-Lund, Jan Henning; Gamelon, Marlène; Jerstad, Kurt; Røstad, Ole Wiggo; Slagsvold, Tore; Stenseth, Nils C.; Vøllestad, L. Asbjørn; Walseng, Bjørn (Journal article, 2020-10)Ecological and evolutionary effects of environmental variation on wild populations are of particular interest in a changing world. Large-scale environmental indices are classically used as environmental explanatory variables ... -
Long‐term variation in the population structure of Arctic charr, Salvelinus alpinus, and brown trout, Salmo trutta
Aass, P.; Jensen, C.S.; L’Abée-Lund, Jan Henning; Vøllestad, Leif Asbjørn (Journal article, 2004)The effects of induced water level fluctuations and introduction of the mysid Mysis relicta Lovén on population structure of brown trout, Salmo trutta L., and Arctic charr, Salvelinus alpinus (L.), were studied during ... -
Norsk vassdragsforvaltning ved et veiskille?
L’Abée-Lund, Jan Henning; Brittain, John E. (Journal article, 2002)Forvaltning av vannressurser har internasjonalt og nasjonalt endret karakter de senere år. Et fellestrekk er at det ikke nødvendigvis er nok vann til alle brukerinteresser, samtidig som vassdragsmiljøet har fått økt ... -
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus
Nilsson, Anna L. K.; L’Abée-Lund, Jan Henning; Vøllestad, Leif Asbjørn; Jerstad, Kurt; Larsen, Bjørn Mejdell; Røstad, Ole Wiggo; Saltveit, Svein Jakob; Skaugen, Thomas; Stenseth, Nils Chr.; Walseng, Bjørn (Journal article, 2017)Interactions between birds and fish are often overlooked in aquatic ecosystems. We studied the influence of Atlantic salmon and brown trout on the breeding population size and reproductive output of the white-throated ... -
Quantifying the Ocean, Freshwater and Human Effects on Year-to-Year Variability of One-Sea-Winter Atlantic Salmon Angled in Multiple Norwegian Rivers
Otero, Jaime; Jensen, Arne J.; L’Abée-Lund, Jan Henning; Stenseth, Nils Chr.; Storvik, Geir O.; Vøllestad, Leif Asbjørn (Journal article, 2011)Many Atlantic salmon, Salmo salar, populations are decreasing throughout the species' distributional range probably due to several factors acting in concert. A number of studies have documented the influence of freshwater ... -
Reproductive migration of brown trout in a small Norwegian river studied by telemetry
Rustadbakken, Atle; L’Abée-Lund, Jan Henning; Arnekleiv, Jo Vegar (Journal article, 2004)The movement of 34 large (39–73 cm standard length) brown trout Salmo trutta was monitored using radio telemetry for up to 74 days in Brumunda, a small Norwegian river (mean annual discharge 3·3 m3 s−1) flowing into the ... -
Spatial and Temporal Variation in the Grilse Proportion of Atlantic Salmon in Norwegian Rivers
L’Abée-Lund, Jan Henning; Vøllestad, Leif Asbjørn; Beldring, Stein (Journal article, 2004)Variation in the sea age at maturity of Atlantic salmon Salmo salar was studied in 158 Norwegian rivers over large spatial (58–71°N; 5–30°E) and temporal (1983–2000) scales. Age at sexual maturity was expressed as the ... -
Threshold values of river discharge and temperature for anglers' catch of Atlantic salmon, Salmo salar L
L’Abée-Lund, Jan Henning; Aspås, H. (Journal article, 1999)The catch by anglers of adult Atlantic salmon, Salmo salar L., was studied over a 5-year period in the River Gaula, Norway. Atlantic salmon were caught over a wide range (23–570 m3 s−1) of the observed extent of river ... -
Tilsyn av vassdragsanlegg er nødvendig for vassdragsmiljøet
L’Abée-Lund, Jan Henning (Journal article, 2021)Artikkelen beskriver hvordan vassdragsanlegg, hovedsakelig vannkraft og akvakultur, er blitt fulgt opp i perioden 2010-2019 på landskap- og miljøsiden i bygge- og driftsfasen av NVE som tilsynsorgan. Et bredt spekter av ... -
Vulnerability of melanic Daphnia to brown trout predation
Sægrov, Harald; Hobæk, Anders; L’Abée-Lund, Jan Henning (Journal article, 1996)The coexistence of melanic Daphnia cf. longispina and facultatively planktivorous brown trout is reported from a clear-water, alpine lake. This co-occurrence is uncommon, presumably due to the vulnerability of pigmented ... -
Årsaker til driftsstans i småkraftverk
Molkersrød, Kristine; L’Abée-Lund, Jan Henning; Rørstad, Per Kristian (Journal article, 2019)En spørreundersøkelse rettet seg mot 256 små vannkraftverk for å dokumentere årsakene til driftsstans i kraftverkene. Kun 59 besvarte undersøkelsen på en slik måte at dataene kunne benyttes i analysene. Det var ingen ...