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Overvåking av forurensningsituasjonen i indre Oslofjord 1998 [Fagrådsrapport nr. 71]
(NIVA-rapport;OR-4058, Research report, 1999-06-01)Vannkvaliteten i fjordens overflatelag sommeren 1998 var omtrent like bra som i 1996/1997, som var meget bra år sammenlignet med 1994 og 1995, hvor overløp og flom (1995) preget forholdene. Den milde vinteren var lite ... -
Efficacy of orally administered oxolinic acid and Vetoquinol, an oxolinic acid ester, for the treatment furunculosis in Atlantic salmon Salmo salar held seawater
(Journal article; Peer reviewed, 1999-06-23)This study was performed to determine the efficacy of orally administered oxolinic acid and Vetoquinol, an oxolinic acid ester, in the treatment of experimental induced furunculosis in Atlantic salmon Salmo salar held in ... -
Pathogenicity of nodavirus strains from striped jack Pseudocaranx dentex and Atlantic halibut Hippoglossus hippoglossus, studied by waterborne challenge of yolk-sac larvae of both teleost species
(Journal article; Peer reviewed, 1999-11-30)The present study shows that differences in pathogenicity exist among fish nodavirus strains. In challenge trials, a Japanese strain (SJ93Nag) was highly virulent to larvae of the striped jack Pseudocaranx dentex but ... -
The uncertain position, status and impact of negative results in marine ecology: philosophical and practical considerations
(Journal article; Peer reviewed, 1999-12-30) -
A method for estimating dredge catching efficiency for blue crabs, Callinectes sapidus, in Chesapeake Bay
(Journal article; Peer reviewed, 2000)A winter dredge survey of blue crab (Callinectes sapidus Rathbun) is conducted annually in Chesapeake Bay as a key element of a longterm, bay-wide population dynamics study. Removal experiments are performed routinely as ... -
Predation on hatchery-reared lobsters released in the wild
(Journal article; Peer reviewed, 2000)Predation on hatchery-reared lobsters (Homarus gammarus) in the wild was studied in order to identify predators in southwestern Norway on rocky and sandy substrates in winter and summer. Lobsters of 12–15 mm carapace length ... -
Standard-target calibration of broadband sonars
(Others, 2000) -
Broadband echo spectra from euphausiids and copepods
(Others, 2000) -
Reconstructing the stock–recruit relationship for Northeast Arctic cod using a bioenergetic index of reproductive potential
(Journal article; Peer reviewed, 2000)Correlation and simulation analyses suggest that, for the Northeast Arctic (NA) cod stock, the total lipid energy (TLE (kJ)) contained in the livers of mature females is proportional to total egg production, making TLE a ... -
Coho salmon (Oncorhynchus kisutch) transgenic for a growth hormone gene construct exhibit increased rates of muscle hyperplasia and detectable levels of differential gene expression
(Journal article; Peer reviewed, 2000)Transgenic coho salmon (Oncorhynchus kisutch) containing a growth hormone gene construct were compared with nontransgenic coho salmon in terms of gross anatomy, muscle cellularity, muscle enzyme activity, and differential gene ... -
Surface disinfection of Atlantic halibut Hippoglossus hippoglossus eggs with ozonated sea-water inactivates nodavirus and increases survival of the larvae
(Journal article; Peer reviewed, 2000-01-14)Disinfection by ozonation of sea-water may reduce the risk of transmission of nodavirus, a major fish pathogen, via Atlantic halibut Hippoglossus hippoglossus eggs. In the present study, eggs at 4 d prior to hatching were ... -
Characterisation of the capsid protein gene from a nodavirus strain affecting the Atlantic halibut Hippoglossus hippoglossus and design of an optimal reverse-transcriptase polymerase chain reaction (RT-PCR) detection assay
(Journal article; Peer reviewed, 2000-01-14)1349 nucleotide fragment of the RNA2 from a nodavirus affecting Atlantic halibut Hippoglossus hippoglossus was characterised and the nuclotide sequence (accession no, AJ245641) was employed to develop an optimal ... -
High survival of neustonic zoea I larvae of American lobster Homarus americanus following short-term exposure to ultraviolet radiation (280 to 400 nm)
(Journal article; Peer reviewed, 2000-02-28)Ultraviolet radiation (W-B = 280 to 320 nm; UV-A = 320 to 400 nm) is harmful to the planktonic early life stages of some marine organisms. In the Gulf of St. Lawrence, Canada, measurements of the diffuse attenuation ... -
Impact of solar ultraviolet radiation on hatching of a marine copepod, Calanus finmarchicus
(Journal article; Peer reviewed, 2000-02-28)The calanold copepod Calanus finmarchicus 1s a key component of the zooplankton community in the estuary and Gulf of St. Lawrence, Canada. During the spring and summer months, C. firmarchicus eggs are released into the ... -
Bacterial production rates and concentrations of organic carbon at the end of the growing season in the Greenland Sea
(Journal article; Peer reviewed, 2000-03-31)Profiles from the euphotic zone at the end of July in the Greenland Sea showed that bacterial production rates were highest in surface Arctic domain water, and generally lower in locations from the warmer North Atlantic ... -
Does the midnight sun increase the feeding rate and hence the growth rate of early juvenile Arcto-Norwegian cod Gadus morhua in the Barents Sea?
(Journal article; Peer reviewed, 2000-05-12)The growth rate of Arcto-Norwegian cod juveniles in the Barents Sea during their first 4 mo of life is about twice that of cod juveniles in areas farther south, such as Georges Bank and the Flemish cap. Cod larvae and ... -
Overvåking av forurensningsituasjonen i indre Oslofjord 1999 [Fagrådsrapport nr. 77]
(NIVA-rapport;OR-4246, Research report, 2000-06-01)Vannkvaliteten i fjordens overflatelag sommeren 1999 var noe dårligere enn i 1998, men klart bedre enn i 1994/95, hvor den var påvirket av ekstra store overløp og storflom. Juni 1999 var relativt kald og nedbørrik. Intensive ...