Blar i NIVA Open Access Archive på forfatter "Pulg, Ulrich"
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Acute effects of gas supersaturation on Atlantic salmon smolt in two Norwegian rivers
Stenberg, Sondre Kvalsvik; Velle, Gaute; Pulg, Ulrich; Skoglund, Helge (Peer reviewed; Journal article, 2020)Total dissolved gas (TDG) supersaturation downstream of hydropower plants may cause gas bubble disease (GBD) and harmful effects in fish. Little is known about tolerance levels of TDG supersaturation on Atlantic salmon ... -
Annual changes in aquatic plant photosynthesis in the regulated river Otra and the effect of plant removal
Demars, Benoît Olivier Laurent; Schneider, Susanne Claudia; Thiemer, Kirstine; Dörsch, Peter; Pulg, Ulrich; Stranzl, Sebastian Franz; Velle, Gaute; Pathak, Devanshi (NIVA-rapport;7858-2023, Research report, 2023)Mass development of submerged aquatic plants is often seen as nuisance for human activities. The present study used novel methods to estimate the changes in ecosystem photosynthesis (mostly Juncus bulbosus), through an ... -
Behavioural response of brown trout (Salmo trutta) to total dissolved gas supersaturation in a regulated river
Lennox, Robert J.; Thiemer, Kirstine; Vollset, Knut Wiik; Pulg, Ulrich; Stranzl, Sebastian; Nilsen, Cecilie Iden; Haugen, Thrond Oddvar; Velle, Gaute (Peer reviewed; Journal article, 2021)Total dissolved gas supersaturation from dams and power stations is a chronic freshwater pollutant that is toxic to animals with aquatic respiration. Laboratory ecotoxicology experiments have revealed capacity for captive ... -
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health
Demars, Benoît Olivier Laurent; Dörsch, Peter; Thiemer, Kirstine; Clayer, Francois; Schneider, Susanne Claudia; Stranzl, Sebastian Franz; Pulg, Ulrich; Velle, Gaute (NIVA-rapport;7633, Research report, 2021)Fish and invertebrates breathing in water supersaturated with gas (total dissolved gas; TDG), e.g. at the outlet of hydropower plants, may develop gas bubble disease (analogous to the bends in humans). Aquatic plants also ... -
Innfrysing av krypsiv nedstrøms Brokke kraftverk vinteren 2011; vurdering av drift og sedimentasjon av løsrevet krypsiv på stasjoner i Otra nedstrøms tiltaket
Mjelde, M.; Kaste, Ø.; Haraldstad, T.; Moe, Therese F.; Barlaup, Bjørn T.; Pulg, Ulrich (NIVA-rapport;6337, Research report, 2012)I februar 2011 ble det utført et tiltak med innfrysning av krypsiv nedstrøms Brokke kraftverk i Otra. Da kraftverket startet opp igjen, ble store mengder fastfrosset krypsiv revet løs fra elvebunnen og ført nedover vassdraget. ...