Search Results - "Jepsen, N."

Near‐Complete Local Reduction of Arctic Stratospheric Ozone by Severe Chemical Loss in Spring 2020 by Wohltmann, I., Gathen, P., Lehmann, R., Maturilli, M., Deckelmann, H., Manney, G. L., Davies, J., Tarasick, D., Jepsen, N., Kivi, R., Lyall, N., Rex, M.

“…In the Antarctic ozone hole, ozone mixing ratios have been decreasing to extremely low values of 0.01–0.1 ppm in nearly all spring seasons since the late…”
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Density‐dependent growth, survival, and biomass production of stocked glass eels (Anguilla anguilla) in seminatural ponds by Pedersen, M. I., Rasmussen, G., Jepsen, N.

“…We sought to demonstrate how eel mortality, growth, and biomass production were related to initial stocking density of glass eels, 18 months after stocking…”
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Time-varying trends from Arctic ozonesonde time series in the years 1994–2022 by Nilsen, K., Kivi, R., Laine, M., Poyraz, D., Van Malderen, R., von der Gathen, P., Tarasick, D. W., Thölix, L., Jepsen, N.

“…Although evidence of recovery in Antarctic stratospheric ozone has been found, evidence of recovery in Arctic ozone is still elusive, even though 25 years have…”
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Survival and growth compared between wild and farmed eel stocked in freshwater ponds by Pedersen, M.I., Jepsen, N., Rasmussen, G.

“…•The study has demonstrated that stocking of on-grown eels of 3–5g is feasible.•Growth of farmed eel was better than their wild conspecifics.•Survival of…”
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Effect of boat noise and angling on lake fish behaviour by Jacobsen, L., Baktoft, H., Jepsen, N., Aarestrup, K., Berg, S., Skov, C.

“…The effects of disturbances from recreational activities on the swimming speed and habitat use of roach Rutilus rutilus, perch Perca fluviatilis and pike Esox…”
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Unifying interfacial self-assembly and surface freezing by Ocko, B M, Hlaing, H, Jepsen, P N, Kewalramani, S, Tkachenko, A, Pontoni, D, Reichert, H, Deutsch, M

“…X-ray investigations reveal that the monolayers formed at the bulk alkanol-sapphire interface are densely packed with the surface-normal molecules hydrogen…”
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Loss of European silver eel passing a hydropower station by Pedersen, M. I., Jepsen, N., Aarestrup, K., Koed, A., Pedersen, S., Økland, F.

“…Summary The aim of this study was to assess escapement success of silver eels, Anguilla anguilla (L.), in a lowland river while passing a reservoir and a…”
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European silver eel migration and fisheries‐induced mortality in the havel river system (germany) by Simon, J, Berends, K, Dörner, H, Jepsen, N, Fladung, E

“…By using acoustic telemetry, the behaviour and fishery mortality of silver eels Anguilla anguilla (L.) were studied during the early phase of the spawning…”
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Movement and mortality of stocked brown trout in a stream by Aarestrup, K., Jepsen, N., Koed, A., Pedersen, S.

“…The movement and mortality of stocked brown trout Salmo trutta were investigated using radio telemetry. Four brown trout left the study area whereas the…”
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Observations of predation on salmon and trout smolts in a river mouth by JEPSEN, N., HOLTHE, E., ØKLAND, F.

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Long-term retention of surgically implanted radio transmitters in pikeperch by Jepsen, N.

“…Radio‐tagged pikeperch Stizostedion lucioperca (55–74 cm LT) were recaptured in a reservoir by anglers 52–55 months after tagging. A total of four fish were…”
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The use of winter refuges by roach tagged with miniature radio transmitters by JEPSEN, N, BERG, S

“…Adult roach (Rutilus rutilus) (13-25 cm) from two shallow lakes, one turbid and one with high water transparency, were tagged with surgically implanted…”
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Does roach behaviour differ between shallow lakes of different environmental state? by Jacobsen, L., Berg, S., Jepsen, N., Skov, C.

“…The diel activity levels and spatial distribution of roach Rutilus rutilus differed markedly between two shallow lakes of different environmental state. The…”
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level of predation used as an indicator of tagging/handling effects by JEPSEN, N, CHRISTOFFERSEN, M, MUNKSGAARD, T

“…In most telemetry studies, there can be adverse effects of capture, handling and tagging. Possible tagging effects include impaired competitive performance and…”
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Survival and behaviour of European silver eel in late freshwater and early marine phase during spring migration by AARESTRUP, K, THORSTAD, E.B, KOED, A, JEPSEN, N, SVENDSEN, J.C, PEDERSEN, M.I, SKOV, C, ØKLAND, F

“…The seaward migration of European silver eel Anguilla anguilla (L.) was studied during the late freshwater and early marine phase in River Gudenaa and Randers…”
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Initial mortality of radio-tagged Atlantic salmon (Salmo salar L.) smolts following release downstream of a hydropower station by KOED, A, JEPSEN, N, AARESTRUP, K, NIELSEN, C

“…The fate of radio-tagged hatchery-reared salmon smolts (Salmo salar L.) was investigated in the tailrace of a hydropower station in the Danish River Gudenaa…”
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The Physiological Response of Chinook Salmon Smolts to Two Methods of Radio‐Tagging by Jepsen, N., Davis, L. E., Schreck, C. B., Siddens, B.

“…Smolts of hatchery‐reared chinook salmon Oncorhynchus tshawytscha were radio‐tagged by gastric insertion or surgical implant, and their physiological response…”
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Behavior of pike (Esox lucius L.) >50 cm in a turbid reservoir and in a clearwater lake by Jepsen, N., Beck, S., Skov, C., Koed, A.

“…– Pike from two different waters were radio‐tagged and released immediately upon recovery. In Bygholm Reservoir 19 pike (52–72 cm) and in Lake Ring 15 pike…”
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Survival of radio-tagged Atlantic salmon (Salmo salar L.) and trout (Salmo trutta L.) smolts passing a reservoir during seaward migration by Jepsen, N. (Danish Inst. for Fisheries Research, Trondheim (Norway). Dept. of Inland Fisheries), Aarestrup, K, Okland, F, Rasmussen, G

“…High mortality-rates of seaward migrating salmonid smolts when passing reservoirs and lakes have earlier been found in the Danish River Gudenaa watershed. To…”
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Swimming speeds and orientation of wild Atlantic salmon post-smolts during the first stage of the marine migration by ØKLAND, F., THORSTAD, E. B., FINSTAD, B., SIVERTSGÅRD, R., PLANTALECH, N., JEPSEN, N., MCKINLEY, R. S.

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