Search Results - "Aksnes, DL"

Coastal water darkening and implications for mesopelagic regime shifts in Norwegian fjords by Aksnes, Dag L., Dupont, Nicolas, Staby, Arved, Fiksen, Øyvind, Kaartvedt, Stein, Aure, Jan

“…The light regime of the water column has a strong structuring effect on aquatic food webs and it has been previously hypothesized that coastal water darkening…”
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Efficient trawl avoidance by mesopelagic fishes causes large underestimation of their biomass by Kaartvedt, Stein, Staby, Arved, Aksnes, Dag L.

“…Mesopelagic fishes occur in all the world’s oceans, but their abundance and consequently their ecological significance remains uncertain. The current global…”
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Silicate as regulating nutrient in phytoplankton competition by Egge, J. K., Aksnes, D. L.

“…The development of phytoplankton communities was studied in floating enclosures. The enclosures were supplied with either surface water or water from 40 m…”
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Changing weather causes behavioral responses in the lower mesopelagic by Kaartvedt, Stein, Røstad, Anders, Aksnes, Dag L.

“…Mesopelagic acoustic scattering layers at a 700 m deep location in the Red Sea ascended 70 to 80 m during a passing rain storm that reduced light levels at the…”
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Light comfort zone in a mesopelagic fish emerges from adaptive behaviour along a latitudinal gradient by Langbehn, TJ, Aksnes, DL, Kaartvedt, S, Fiksen, Ø, Jørgensen, C

“…Throughout the oceans, small fish and other micronekton migrate between daytime depths of several hundred meters and near-surface waters at night. These diel…”
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Evidence for light-controlled migration amplitude of a sound scattering layer in the Norwegian Sea by Norheim, Eirik, Klevjer, Thor A., Aksnes, Dag L.

“…The oceanic sound scattering layer (SL) is an ubiquitous acoustic signature of mesopelagic fishes and invertebrates that are important food sources for the…”
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Follow the light—diurnal and seasonal variations in vertical distribution of the mesopelagic fish Maurolicus muelleri by Staby, A, Aksnes, DL

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Herding mesopelagic fish by light by Kaartvedt, Stein, Røstad, Anders, Opdal, Anders Frugård, Aksnes, Dag L.

“…To assess organisms forming mesopelagic scattering layers in the Red Sea, we took advantage of their reactions to light. We used a remotely operated vehicle…”
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Seasonal patterns in the nocturnal distribution and behavior of the mesopelagic fish Maurolicus muelleri at high latitudes by Prihartato, Perdana K., Aksnes, Dag L., Kaartvedt, Stein

“…Acoustic scattering layers (SL) ascribed to pearlside Maurolicus muelleri were studied in Masfjorden, Norway, using upward-looking echo sounders cabled to…”
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Resource allocation between somatic growth and reproductive output in the pelagic chordate Oikopleura dioica allows opportunistic response to nutritional variation by TROEDSSON, Christofer, BOUQUET, Jean-Marie, AKSNES, Dag L, THOMPSON, Eric M

“…Pelagic urochordate appendicularians are a vital component of marine zooplankton communities, second in abundance only to copepods. Found in all major ocean…”
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Inherent and apparent traits in microbial nutrient uptake by Aksnes, Dag L., Cao, Francisco J.

“…Nearly 50 yr ago, the Michaelis-Menten (MM) model, originally derived for enzyme kinetics, was adapted to characterize microbial nutrient uptake and has become…”
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Phytoplankton size scaling with nutrient concentration by Beltrán-Heredia, Elena, Aksnes, Dag L., Cao, Francisco J.

“…Phytoplankton, the autotrophic component of the plankton community, is a key factor in oceanic ecosystems and in biogeochemical cycling. Over much of the…”
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Relationship between fish and jellyfish as a function of eutrophication and water clarity by Haraldsson, Matilda, Tönnesson, Kajsa, Tiselius, Peter, Thingstad, Tron Frede, Aksnes, Dag L.

“…There is a concern that blooms of cnidarians and ctenophores, often referred to as jellyfish, are increasing in frequency and intensity worldwide and that…”
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Internal wave-mediated shading causes frequent vertical migrations in fishes by Kaartvedt, Stein, Klevjer, Thor A., Aksnes, Dag L.

“…We provide evidence that internal waves cause frequent vertical migrations (FVM) in fishes. Acoustic data from the Benguela Current revealed that pelagic…”
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Lévy night flights by the jellyfish Periphylla periphylla by Ugland, Karl I., Aksnes, Dag L., Klevjer, Thor A., Titelman, Josefin, Kaartvedt, Stein

“…Jellyfish blooms occur in marine environments around the world and have been linked to over-fishing, eutrophication and climatic change. In some coastal areas…”
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Optical Control of Fish and Zooplankton Populations by Aksnes, Dag L., Nejstgaard, Jens, Sœdberg, Eivind, Sørnes, Tom

“…Aquatic food webs are affected from the bottom up by light through its effect on photosynthesis and productivity. But light also has a top-down effect, because…”
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Winter distribution and migration of the sound scattering layers, zooplankton and micronekton in Masfjorden, western Norway by Baliño, Beatriz M., Aksnes, Dag L.

“…Sound scattering layers (SSLs) and vertical distribution of zooplankton and micronekton in Masfjorden, western Norway, were studied in January 1988. Two…”
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Predation Efficiency in Visual and Tactile Zooplanktivores by Sørnes, Tom A., Aksnes, Dag L.

“…Gelatinous zooplanktivores (medusae, siphonophores, and ctenophores) and visual zooplanktivores (fish) interact through competition, predation, and…”
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Vertical Distribution and Mortality of Overwintering Calanus by Bagoien, Espen, Kaartvedt, Stein, Aksnes, Dag L., Eiane, Ketil

“…Overwintering Calanus spp. were studied in four Norwegian fjords with different predator regimes and ranging in depth from 380 to 1300 m. Three fjords held…”
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Stage-Specific Mortality of Calanus spp. under Different Predation Regimes by Eiane, Ketil, Aksnes, Dag L., Ohman, Mark D., Wood, Simon, Martinussen, Monica B.

“…We have applied the population surface method to estimate the mortality rates of eggs, nauplii, and copepodids of Calanus spp. in two Norwegian fjords with…”
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