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Festskrift Per Solemdal 60 år
(Book, 2001-02-08) -
Redescription of Microsporidium takedai (Awakura, 1974) as Kabatana takedai (Awakura, 1974) comb. n.
(Journal article; Peer reviewed, 2001-04-10)Ultrastructural study of the microsporidian Microsporidium takedai from the muscles of masu salmon Oncorhynchus masou proved that this species can be assigned to the genus Kabatana Lom, Dykova and Tonguthai, 2000. The ... -
Immune response to a recombinant capsid protein of striped jack nervous necrosis virus (SJNNV) in turbot Scophthalmus maximus and Atlantic halibut Hippoglossus hippoglossus, and evaluation of a vaccine against SJNNV
(Journal article; Peer reviewed, 2001-05-04)Immunisation by intraperitoneal injection of an oil-emulgated recombinant partial capsid protein (rT2) from striped jack nervous necrosis virus (SJNNV) was performed on adult turbot Scophthalmus maximus and Atlantic halibut ... -
Overvåking av forurensningsituasjonen i indre Oslofjord 2000 [Fagrådsrapport nr. 85]
(NIVA-rapport;OR-4387, Research report, 2001-06-01)Rapporten omhandler resultatene fra undersøkelser foretatt i fjordens vannmasser i år 2000. Fjordens dypvannsfornyelse og oksygenforhold beskrives og overflatevannets kvalitet sommeren 2000 blir bedømt ut fra siktedyp, ... -
Can silicate and turbulence regulate the vertical flux of biogenic matter? A mesocosm study
(Journal article; Peer reviewed, 2001-07-31)The effects of silicate and turbulence on the vertical flux of biogenic matter were studied in mesocosms. The experiment consisted of eight 27 m3 enclosures all fertilised with nitrate and phosphate (NP), while 4 of the ... -
Spring bloom nutrient dynamics in the Oslofjord
(Journal article; Peer reviewed, 2001-09-10)Primary production and uptake rates of ammonium, nitrate and silicic acid were measured during the 1996 spring bloom in the Oslofjord, southern Norway, using isotope methodology (14C, 15N and 32Si). Chlorophyll a (chl a) ... -
Correcting for underestimation of microzooplankton grazing in bottle incubation experiments with mesozooplankton
(Journal article; Peer reviewed, 2001-10-18)Bottle incubation experiments are widely used in mesozooplankton grazing studies. However, we have shown here that traditional particle removal experiments with Calanus finmarchicus and C. helgolandicus as grazers on ... -
Zooplankton growth, diet and reproductive success compared in simultaneous diatom- and flagellatemicrozooplankton-dominated plankton blooms
(Journal article; Peer reviewed, 2001-10-18)Development of mesozooplankton biomass, feeding activity and reproductive success of the copepod Calanus helgolandicus were compared in blooms of natural plankton in 7 mesocosms on the west coast of Norway between 28 August ... -
Density-dependent growth as a key mechanism in the regulation of sh populations: evidence from among-population comparisons
(Journal article; Peer reviewed, 2001-11-30)It is generally assumed that fish populations are regulated primarily in the juvenile (pre-recruit) phase of the life cycle, although density dependence in growth and reproductive parameters within the recruited phase has ... -
Growth of Barents Sea capelin (Mallotus villosus) in relation to zooplankton abundance
(Journal article; Peer reviewed, 2002)Because capelin feed on zooplankton, the availability of the latter may be a limiting factor for capelin growth in at least some areas and at certain times. It was therefore hypothesized that a relationship exists between ... -
Diurnal variation in bottom trawl survey catches: does it pay to adjust?
(Journal article; Peer reviewed, 2002)The diurnal bias of bottom trawl survey catches is studied with the purpose of adjusting for it and thereby improving the accuracy of abundance estimates. The correction term is estimated with uncertainty and thus ... -
Do abiotic mechanisms determine interannual variability in length-at-age of juvenile Arcto-Norwegian cod?
(Journal article; Peer reviewed, 2002)For the large Arcto-Norwegian stock of cod (Gadus morhua L.) in the Barents Sea, year-to-year variability in growth is well documented. Here three hypotheses for the observed inverse relation between abundance and the mean ... -
Bomb dating and age determination of large pelagic sharks
(Journal article; Peer reviewed, 2002)Despite their notoriety and role as apex predators, the longevity of large pelagic sharks such as the porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) is unknown. Vertebral growth bands provide an accurate indicator ... -
Stock–environment recruitment models for Norwegian spring spawning herring (Clupea harengus)
(Journal article; Peer reviewed, 2002)Different stock–environment recruitment models for Norwegian spring spawning herring (Clupea harengus) are fitted to a time series of spawning stock, recruitment, and temperature data extending back to 1907. In addition ... -
The Amoebe plan. 1, Overall plan ; 2, Module descriptions
(Book, 2002)A 10-year multidisciplinary research and development project to improve the understanding of the dynamics of the marine ecosystems, and to produce a tool to meet the future increasing demands for an ecological approach to ... -
Comparing Kirchhoff-approximation and boundary-element models for computing gadoid target strengths
(Journal article; Peer reviewed, 2002)To establish the validity of the boundary-element method (BEM) for modeling scattering by swimbladder-bearing fish, the BEM is exercised in several ways. In a computation of backscattering by a 50-mm-diam spherical void ... -
Grazing by the heterotrophic dinoflagellate Protoperidinium steinii on a Ceratium bloom
(Journal article; Peer reviewed, 2002-01-11)Variations in heterotrophic dinoflagellate populations at a station in the inner Oslofjord, Norway, were studied by sampling at ca 4 d intervals. Cells were concentrated from 1 l samples by filtration before being counted ... -
Distribution and density of goldsinny wrasse (Ctenolabrus rupestris) (Labridae) in the Risør and Arendal areas along the Norwegian Skagerrak coast
(Journal article; Peer reviewed, 2002-03)Samples of fish were collected in the Arendal and Risør areas on the Norwegian Skagerrak coast during the period 1986 to 1990 using a beach seine at 36 different locations. In the Risør area, 131 out of 254 hauls yielded ... -
Fishery for goldsinny wrasse (Ctenolabrus rupestris) (Labridae) with pots along the Norwegian Skagerrak coast
(Journal article; Peer reviewed, 2002-03)Goldsinny wrasse (Ctenolabrus rupestris) was captured in pots during the years 1994-98 in the area between Arendal and Homborsund, west of Grimstad, along the Norwegian Skagerrak coast. The pots, made of steel 1 x 1 cm ... -
Inferring ecological separation from regional differences in radioactive caesium in harbour porpoises Phocoena phocoena
(Journal article; Peer reviewed, 2002-03-06)Geographic variation in the level of radioactive caesium-137 (Cs-137) was examined from the axial muscle of 36 harbour porpoises Phocoena phocoena obtained as bycatch from 5 locations along the coast of Norway, ranging ...