Blar i Articles på forfatter "Skjoldal, Hein Rune"
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Abundance and biomass of copepods and cladocerans in Atlantic and Arctic domains of the Barents Sea ecosystem
Skjoldal, Hein Rune; Aarflot, Johanna Myrseth (Peer reviewed; Journal article, 2023)Zooplankton in the Barents Sea have been monitored annually with a standard procedure with determination of size-fractioned biomass since the mid-1980s. Biomass of copepods and cladocerans was estimated based on measured ... -
Abundance, maturity and growth of the krill species Thysanoessa inermis and T. longicaudata the Barents Sea
Dalpadado, Padmini; Skjoldal, Hein Rune (Journal article; Peer reviewed, 1996-12-05)Thysanoessa inermis and T. longicaudata were the dominant krill species observed in the western and central Barents Sea between 1984 and 1992. Both species are typically boreal and subarctic, and were found in very low ... -
Caught in broad daylight: Topographic constraints of zooplankton depth distributions
Aarflot, Johanna Myrseth; Aksnes, Dag Lorents; Opdal, Anders Frugård; Skjoldal, Hein Rune; Fiksen, Øyvind (Journal article; Peer reviewed, 2018)For visual predators, sufficient light is critical for prey detection and capture. Because light decays exponentially with depth in aquatic systems, vertical movement has become a widespread strategy among zooplankton for ... -
Climate effects on temporal and spatial dynamics of phytoplankton and zooplankton in the Barents Sea
Dalpadado, Padmini; Arrigo, Kevin R.; van Dijken, Gert L.; Skjoldal, Hein Rune; Bagøien, Espen; Dolgov, Andrey V.; Prokopchuk, Irina P.; Sperfeld, Erik (Peer reviewed; Journal article, 2020) -
Consumption of silicic acid below the euphotic zone by sedimenting diatom blooms in the Barents Sea
Rey, Francisco; Skjoldal, Hein Rune (Journal article; Peer reviewed, 1987-03-23)Massive sedimentation of spring phytoplankton blooms occurs in the Barents Sea as in many other shelf sea environments. Associated with this sedimentation there is a large decrease in concentration of dissolved shcic ... -
Contribution of Calanus to the mesozooplankton biomass in the Barents Sea
Aarflot, Johanna Myrseth; Skjoldal, Hein Rune; Dalpadado, Padmini; Skern-Mauritzen, Mette (Peer reviewed; Journal article, 2017) -
A deep scattering layer under the North Pole pack ice
Snoeijs-Leijonmalm, Pauline; Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Knutsen, Tor; Korneliussen, Rolf; Ona, Egil; Skjoldal, Hein Rune; Stranne, Christian; Mayer, Larry; Jakobsson, Martin; Gårdfeldt, Katarina (Peer reviewed; Journal article, 2021)The 3.3 million km2 marine ecosystem around the North Pole, defined as the Central Arctic Ocean (CAO), is a blind spot on the map of the world’s fish stocks. The CAO essentially comprises the permanently ice-covered deep ... -
Diel variations in photosynthetic activity of summer phytoplankton in Lindåspollene, western Norway
Erga, Svein Rune; Skjoldal, Hein Rune (Journal article; Peer reviewed, 1990-07-19)Diel patterns in photosynthesis of natural phytoplankton were studied during a 5 d period during midsummer in Lindbspollene, a land-locked fjord of western Norway. Samples were taken from depths of 0.5, 5, 10 and 21 m ... -
Diet and trophic structure of fishes in the Barents Sea: the Norwegian-Russian program “Year of stomachs” 2015 - establishing a baseline
Eriksen, Elena; Benzik, Aleksander N.; Dolgov, Andrey V.; Skjoldal, Hein Rune; Vihtakari, Mikko Juhani; Johannesen, Edda; Prokhorova, Tatiana; Keulder-Stenevik, Felicia Juanita; Prokopchuk, Irina; Strand, Espen (Peer reviewed; Journal article, 2020)There is a long history of investigations of fish diet in the Barents Sea. The focus has been on commercially important fish species and their food consumption, while diet and interactions of other fishes have been studied ... -
A global movement toward an ecosystem approach to management of marine resources
Sherman, K.; Sissenwine, M.; Christensen, V.; Duda, A.; Hempel, G.; Ibe, C.; Levin, S.; Lluch-Belda, D.; Matishov, G.; McGlade, J.; O’Toole, M.; Seitzinger, S.; Serra, R.; Skjoldal, Hein Rune; Tang, Q.; Thulin, J.; Vandeweerd, V.; Zwanenburg, K. (Others, 2005-09-16) -
Implementing the ecosystem approach: experiences from the North Sea, ICES, and the Institute of Marine Research, Norway
Misund, Ole Arve; Skjoldal, Hein Rune (Others, 2005-09-16) -
Monitoring marine populations and communities: methods dealing with imperfect detectability
Katsanevakis, Stelios; Smit, Anke Weber; Pipitone, Carlo; Leopold, Mardik; Cronin, Michelle; Scheidat, Meike; Doyle, Thomas K.; Buhl-Mortensen, Lene; Buhl-Mortensen, Pål; D'Anna, Giovanni; de Boois, Ingeborg; Dalpadado, Padmini; Damalas, Dimitrios; Fiorentino, Fabio; Garofalo, Germana; Giacalone, Vincenzo Maximiliano; Hawley, Kate; Issaris, Yiannis; Jansen, Jeroen; Rosten, Carolyn; Knittweis, Leyla; Kröncke, Ingrid; Mirto, Simone; Muxika, Iñigo; Reiss, Henning; Skjoldal, Hein Rune; Vöge, Sandra (Journal article; Peer reviewed, 2012) -
Monitoring marine populations and communities: methods dealing with imperfect detectability
Katsanevakis, Stelios; Weber, Anke; Pipitone, Carlo; Leopold, Mardik; Cronin, Michelle; Scheidat, Meike; Doyle, Thomas K.; Buhl-Mortensen, Lene; Buhl-Mortensen, Pål; D’Anna, Giovanni; de Boois, I.J.; Dalpadado, Padmini; Damalas, Dimitrios; Fiorentino, Fabio; Garofalo, Germana; Giacalone, Vincenzo Maximiliano; Hawley, Kate; Issaris, Yiannis; Jansen, J.; Knight, Carolyn; Knittweis, Leyla; Kröncke, Ingrid; Mirto, Simone; Muxika, Iñigo; Reiss, Henning; Skjoldal, Hein Rune; Vöge, Sandra (Journal article; Peer reviewed, 2012-06-26)Effective monitoring of populations and communities is a prerequisite for ecosystembased management of marine areas. However, monitoring programs often neglect important sources of error and thus can lead to biased ... -
Predation by copepods upon natural populations of Phaeocystis pouchetii as a function of the physiological state of the prey
Estep, Kenneth W.; Nejstgaard, Jens Christian; Skjoldal, Hein Rune; Rey, Francisco (Journal article; Peer reviewed, 1990-11-01)Conflicting data have been previously presented on the ability of copepods to prey upon the prymneslophyte Phaeocystis pouchetii. While some have suggested that gelatinous colonies of this species contain biochemical ... -
Recruitment variability of fish stocks in the Barents Sea: Spatial and temporal variation in 0-group fish length of six commercial species during recent decades of warming (1980–2017)
Skjoldal, Hein Rune; Eriksen, Elena; Gjøsæter, Harald; Skagseth, Øystein; Prozorkevich, Dmitry A.; Lien, Vidar Surén (Peer reviewed; Journal article, 2022)Young-of-the-year (0-group) fish in the Barents Sea have been investigated in an annual joint Norwegian-Russian pelagic trawl survey in autumn, using a standardized procedure since 1980. We use a conceptual framework of ... -
Reproduction and development of Calanius finmarchicus, C. glacialis and C. hyperboreus in the Barents Sea
Melle, Webjørn; Skjoldal, Hein Rune (Journal article; Peer reviewed, 1998)The aim of this study is to examine the reproduction and development of Calanus finmarchicus, C. glacialis and C. hyperboreus in relation to the timing and progress of the phytoplankton spring bloom in different water ... -
Seasonal and interannual variability in abundance and population development of Calanus finmarchicus at the western entrance to the Barents Sea, 1995–2019
Skjoldal, Hein Rune; Aarflot, Johanna Myrseth; Bagøien, Espen; Skagseth, Øystein; Rønning, Jon S.; Lien, Vidar Suren (Peer reviewed; Journal article, 2021)Data on copepodid abundance and stage composition of Calanus finmarchicus was collected with seasonal resolution (5–6 times a year) from four stations along an oceanographic transect across the western Barents Sea Opening ... -
Sedimentation of particulate organic matter and silicium during spring and summer in Lindaspollene, Western Norway
Skjoldal, Hein Rune; Wassmann, Paul (Journal article; Peer reviewed, 1986-04-24)Sedimentation of organic and inorganic matter was determined at 18, 38, 70 and 85 m between 17 March and 8 October 1982, m the land-locked flord Llndespollene Rates of sedimentation were highest dunng spnng with 2 peaks ... -
Size-fractioned zooplankton biomass in the Barents Sea: Spatial patterns and temporal variations during three decades of warming and strong fluctuations of the capelin stock (1989–2020)
Skjoldal, Hein Rune; Eriksen, Elena; Gjøsæter, Harald (Peer reviewed; Journal article, 2022)Zooplankton biomass has been monitored on joint Norwegian-Russian surveys in late summer and autumn since the 1980s. We report here on zooplankton biomass in three size fractions (<1, 1–2, and > 2 mm in screen mesh opening) ... -
Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming
Eriksen, Elena; Skjoldal, Hein Rune; Gjøsæter, Harald; Primicerio, Raul (Peer reviewed; Journal article, 2017)