Blar i forfatter "Mitamura, Hiromichi"

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    • Homing behaviour of Atlantic salmon (Salmo salar) during final phase of marine migration and river entry 

      Davidsen, Jan Grimsrud; Rikardsen, Audun H.; Thorstad, Eva Bonsak; Halttunen, Elina; Mitamura, Hiromichi; Præbel, Kim; Skardhamar, Jofrid; Næsje, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Little is known about Atlantic salmon behaviour during the last phase of the marine homing migration and subsequent river entry. In this study, 56 adult Atlantic salmon in the Alta Fjord in northern Norway were equipped with acoustic transmitters. Salmon generally followed the coastline, but their horizontal distribution was also affected by wind-induced spreading of river water across the fjord. ...

    • Movements of female lumpsucker Cyclopterus lumpus in a Norwegian fjord during the spawning period 

      Mitamura, Hiromichi; Thorstad, Eva Bonsak; Uglem, Ingebrigt; Bjørn, Pål Arne; Økland, Finn; Næsje, Tor; Dempster, Tim; Arai, Nobuaki (Research report; Forskningsrapport, 2007)
      Lumpsucker are distributed throughout the North Atlantic Ocean, and migrate considerable distances between offshore feeding areas and shallow inshore spawning areas. In July 2006, a study on the movements of female lumpsucker during the spawning period was carried out in Øksfjord, Northern Norway. Twenty fish (mean body mass 3.2 kg, range 1.5- 4.8 kg) were tagged with acoustic transmitters and ...