caa a22 4500 606227121 CHVBK 20210128101156.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10641-015-0378-4 doi (NATIONALLICENCE)springer-10.1007/s10641-015-0378-4 Variable migration and delay in two stock components of an Atlantic salmon population [Elektronische Daten] [K. Kristinsson, G. Gudbergsson, G. Gislason] Migration obstacles, such as waterfalls, can delay the upriver migration of salmon, but little is known about the magnitude of such delays and the impact on different stock components. Atlantic salmon (n = 60) were captured by angling and radio tagged below natural waterfalls near the mouth of the Laxa River, northeast Iceland. The movement of the tagged fish was followed throughout the fishing and spawning season. The distributions of the tagged salmon and salmon caught by sport fishermen in the Laxa River were consistent. Water temperature had a significant effect on the behaviour of tagged salmon ascending the waterfalls. Salmon that spawned in the lower parts of the main river were delayed longer below the waterfalls than salmon spawning in the upper river. Salmon that spawned in tributaries tended to delay longer below the waterfalls than salmon spawning in the main river, and the average delay tended to be positively correlated with fish length. For multi-sea-winter salmon, the period from tagging until becoming stationary at a holding site near their spawning ground was 35days on average, which was significantly longer than one-sea-winter salmon, in which this period was 17days on average. Springer Science+Business Media Dordrecht, 2015 Salmo salar nationallicence Radio tagging nationallicence Riverine migration nationallicence Waterfalls nationallicence Environmental factors nationallicence Distribution nationallicence Kristinsson K. North East Iceland Nature Center, Hafnarstett 3, 640, Husavik, Iceland aut Gudbergsson G. Institute of Freshwater Fisheries, Keldnaholt, 112, Reykjavík, Iceland aut Gislason G. Faculty of Life and Environmental Science, University of Iceland, Askja, Sturlugata 7, 101, Reykjavik, Iceland aut Environmental Biology of Fishes Springer Netherlands 98/6(2015-06-01), 1513-1523 0378-1909 98:6<1513 2015 98 10641 https://doi.org/10.1007/s10641-015-0378-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-015-0378-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kristinsson K. North East Iceland Nature Center, Hafnarstett 3, 640, Husavik, Iceland aut NATIONALLICENCE 700 1- Gudbergsson G. Institute of Freshwater Fisheries, Keldnaholt, 112, Reykjavík, Iceland aut NATIONALLICENCE 700 1- Gislason G. Faculty of Life and Environmental Science, University of Iceland, Askja, Sturlugata 7, 101, Reykjavik, Iceland aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/6(2015-06-01), 1513-1523 0378-1909 98:6<1513 2015 98 10641