Inger‐Britt Falk‐Petersen

UiT The Arctic University of Norway

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Velmurugu Puvanendran

Nofima

Thorsten B. H. Reusch

GEOMAR Helmholtz Centre for Ocean Research Kiel

Jorge M. O. Fernandes

Nord University

Stefano Peruzzi

UiT The Arctic University of Norway

Catriona Clemmesen

GEOMAR Helmholtz Centre for Ocean Research Kiel

Martina Stiasny

University of Southampton

Felix Mittermayer

GEOMAR Helmholtz Centre for Ocean Research Kiel

ØH

Ørjan Hagen

Nord University

Jasmine Nahrgang

UiT The Arctic University of Norway

Marianne Frantzen

Akvaplan-niva

Cooperative Institutions

UiT The Arctic University of Norway

University of Bergen

Akvaplan-niva

Norwegian Institute of Marine Research

GEOMAR Helmholtz Centre for Ocean Research Kiel

The FRAM Centre

University of Oslo

Kiel University

Nord University

Norwegian University of Life Sciences

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Cod and Ocean Acidification: Transcriptomic Responses

Felix Mittermayer Martina Stiasny Michael Sswat Till Bayer Sissel Jentoft

Ocean Acidification

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Citations (0)

Are life histories of Norwegian fjord herring populations of Pacific ancestry similar to those of Atlantic or Pacific herring?

Journal of Marine Systems (2016)

Nina Mikkelsen Torstein Pedersen Thassya Christina dos Santos Schmidt Inger‐Britt Falk‐Petersen Aril Slotte

Fjord

Pacific herring

10.1016/j.jmarsys.2016.12.004

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Citations (8)

Electron microscopical studies of the effects of aromatic hydrocarbons on sea urchin embryos

Sarsia (1982)

Sunniva Lønning Inger‐Britt Falk‐Petersen

The effects of mono-, di-, and tricycfic aromatic hydrocarbons on the early development of Paracentrotus lividus were studied. In the light microscope effects were registered as inhibition of differentiation and formation of abnormal larvae with excess mesenchyme. With benzene, acridine, and aminoacridine cell separation and rapid disintegration of the embryos were observed, whereas with acridine orange the embryos developed into active larvae with a characteristic abnormal appearance. In the electron microscope weak effects were studied such as more distinct yolk granules than in the control. An increase in the number of lipid droplets was observed after treatment in phenanthrene and low concentrations of acridine orange. In the presence of acridine orange and Azur A the yolk granules appeared as more or less empty vesicles.

Acridine orange

Paracentrotus lividus

Acridine

Blastula

Yolk

10.1080/00364827.1982.10420541

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Citations (3)

Effects of chronic dietary petroleum exposure on reproductive development in polar cod (Boreogadus saida)

Aquatic Toxicology (2016)

Morgan Lizabeth Bender Marianne Frantzen Ireen Vieweg Inger‐Britt Falk‐Petersen Helge Johnsen

Increasing human activities in the Arctic raise the risk of petroleum pollution, thus posing an elevated risk for Arctic organisms to be chronically exposed to petroleum compounds. The endocrine disrupting properties of some of these compounds (i.e. polycyclic aromatic hydrocarbons [PAHs]) present in crude oil may have negative effects on the long and energy intensive reproductive development of polar cod (Boreogadus saida), an Arctic keystone species. In the present study, selected reproductive parameters were examined in feral polar cod exposed to crude oil via a natural diet (0.11, 0.57 and 1.14 μg crude oil/g fish/day [corresponding to low, medium and high treatments, respectively]) for 31 weeks prior to spawning. Fish maturing in the current reproductive period made up 92% of the experimental population while 5% were immature and 3% were identified as resting fish. Phase I metabolism of PAHs, indicated by ethoxyresorufin-O-deethylase (EROD) activity, showed a dose-dependent increase in high and medium crude oil treatments at week 6 and 22, respectively. Decreasing EROD activity and increasing PAH bile metabolite concentrations over the experimental period may be explained by reproductive maturity stage. Significant alterations in sperm motility were observed in crude oil exposed males compared to the controls. The investigated somatic indices (gonad and hepatic), germ cell development and plasma steroid levels (estradiol-17β [females], testosterone [males and females] and 11-ketotestosterone [males]) were not significantly altered by chronic dietary exposure to crude oil. The environmentally realistic doses polar cod were chronically exposed to in this study were likely not high enough to induce adverse effects in this ecologically important fish species. This study elucidated many baseline aspects of polar cod reproductive physiology and emphasized the influence of maturation state on biomarkers of PAH biotransformation (EROD and PAH bile metabolites).

Cod liver oil

10.1016/j.aquatox.2016.10.005

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Citations (33)

Toxicity of crude oil and pyrene to the embryos of beach spawning capelin (Mallotus villosus)

Aquatic Toxicology (2011)

Marianne Frantzen Inger‐Britt Falk‐Petersen Jasmine Nahrgang Timothy J. Smith Gro Harlaug Olsen

Capelin

Mallotus

10.1016/j.aquatox.2011.09.022

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Citations (40)

Observations on the occurrence, size, and feeding of pelagic larvae of the common wolffish (Anarhichas lupus) in western Finnmark, northern Norway

ICES Journal of Marine Science (1990)

Inger‐Britt Falk‐Petersen Tor Haug Erlend Moksness

Common wolffish larvae were caught during ichthyoplankton surveys in western Finnmark, northern Norway, in March, May, and July 1987. The surveys, by horizontal hauls with various trawling gear, covered depths from 5 to 150 m, and yielded a total of nearly 6000 larvae and juveniles, ranging in size from 20 mm (first-feeding stage) to 40 mm in total length. The spawning and hatching periods of the common wolffish were estimated to be in September 1986 and the first half of April 1987, respectively. A specific growth rate of 3.5%/day was calculated for the larvae in the period from May to August 1987. The stomach contents of 250 common wolffish larvae were examined. The contents consisted of various crustaceans (1–3 mm) and fish larvae (6–10 mm). Amphipods (57.3 %) and decapod larvae (15.4 %) were dominant.

Ichthyoplankton

10.1093/icesjms/46.2.148

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Citations (20)

Reproduction of the shorthorn sculpin Myoxocephalus scorpius in northern Norway

Journal of Sea Research (2004)

J. A. Luksenburg Torstein Pedersen Inger‐Britt Falk‐Petersen

Shorthorn

10.1016/j.seares.2003.09.001

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Citations (15)

Transcriptome sequencing and histology reveal dosage compensation in the liver of triploid pre-smolt Atlantic salmon

Scientific Reports (2020)

Derrick Kwame Odei Ørjan Hagen Stefano Peruzzi Inger‐Britt Falk‐Petersen Jorge M. O. Fernandes

Abstract Triploid Atlantic salmon ( Salmo salar L.) is seen as one of the best solutions to solve key issues in the salmon farming industry, such as the impact of escapees on wild stocks and pre-harvest sexual maturation. However, the effects of triploidy on salmon smoltification are poorly understood at the molecular level, even though smoltification is a very sensitive period that has a major influence on survival rate and performance of farmed salmon. In this study, we have compared the liver transcriptomes of diploid and triploid Atlantic salmon at three ontogeny stages: fry, parr and smolt. In diploid fish, a total of 2,655 genes were differentially expressed between fry and parr, whereas 506 genes had significantly different transcript levels between parr and smolts. In triploids, 1,507 and 974 genes were differentially expressed between fry and parr, and between parr and smolts, respectively. Most of these genes were down-regulated and 34 genes were differentially expressed between ploidies at the same stage. In both ploidy groups, the top differentially expressed genes with ontogeny stage belonged to common functional categories that can be related to smoltification. Nucleotide and energy metabolism were significantly down-regulated in fry when compared to parr, while immune system processes were significantly down-regulated in parr when compared to smolts. The close resemblance of enriched biological processes and pathways between ploidy groups suggests that triploidy is regulated by genome dosage compensation in Atlantic salmon. Histological analysis revealed that areas of vacuolization (steatosis) were present only in fry and parr stages, in contrast to a compact cellular histology with glycogen granules after smoltification. There was no significant difference in vacuolization between ploidy groups at the fry stage but the liver of diploid parr had a 33.5% higher vacuolization area compared to their triploid counterparts. Taken together, our data provide novel insights into the changes that occur at the molecular and histological level in the liver of both diploid and triploid Atlantic salmon prior to and during smoltification.

Smoltification

Sexual maturity

10.1038/s41598-020-73814-6

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Citations (8)

Environmental effects of a herring mass mortality in northern Norway. Impact on and recovery of rockyshore and soft-bottom biotas

Sarsia (1991)

Eivind Oug Tor Eiliv Lein Regina Küfner Inger‐Britt Falk‐Petersen

Abstract In October 1984 a school of herring died in the small shallow bay of Alterosen, Lofoten, northern Norway. During the decay of the fish, subtidal sediments turned black from sulphides while fats and oils floated ashore covering seaweeds and rocks. In the subtidal the soft-bottom macrofauna was killed. Recovery took more than three years, following typical successional patterns. The polychaetes Capitella capitata and Scolelepis fuliginosa had high abundances during 1985 and 1986. Intertidal damage was limited. In the rocky shore the key algal species, Ascophyllum nodosum, tolerated the pollution, but encrusting algae and sponges, and epiphytes were locally affected. Intertidal sediment fauna was only affected during autumn 1984. The different impact and recovery of the intertidal and subtidal communities was found to be in marked contrast to other cases of long-term organic pollution. The results are discussed in view of various effects of stress and disturbance on communities.

Rocky shore

Ascophyllum

10.1080/00364827.1991.10413475

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Citations (8)

Growth and development of skeletal anomalies in diploid and triploid Atlantic salmon (Salmo salar) fed phosphorus-rich diets with fish meal and hydrolyzed fish protein

PLoS ONE (2018)

Stefano Peruzzi Velmurugu Puvanendran Guido Riesen Rudi Ripman Seim Ørjan Hagen

Diploid and triploid Atlantic salmon, Salmo salar were fed high-protein, phosphorus-rich diets (56-60% protein; ca 18g phosphorus kg-1 diet) whilst being reared at low temperature from start-feeding until parr-smolt transformation. Performances of salmon fed diets based on fish meal (STD) or a mix of fishmeal and hydrolysed fish proteins (HFM) as the major protein sources were compared in terms of mortality, diet digestibility, growth and skeletal deformities. Separate groups of diploids and triploids were reared in triplicate tanks (initially 3000 fish per tank; tank biomass ca. 620 g) from 0-2745 degree-days post-start feeding (ddPSF). Growth metrics (weight, length, condition factor) were recorded at ca. 4 week intervals, external signs of deformities to the operculum, jaws and spinal column were examined in parr sampled at 1390 ddPSF, and external signs of deformity and vertebral anomalies (by radiography) were examined in fish sampled at the end of the trial (2745 ddPSF). The triploid salmon generally had a lower mass per unit length, i.e. lower condition factor, throughout the trial, but this did not seem to reflect any consistent dietary or ploidy effects on either dietary digestibility or the growth of the fish. By the end of the trial fish in all treatment groups had achieved a weight of 50+ g, and had completed the parr-smolt transformation. The triploids had slightly, but significantly, fewer vertebrae (Triploids STD 58.74 ± 0.10; HFM 58.68 ± 0.05) than the diploids (Diploids STD 58.97 ± 0.14; HFM 58.89 ± 0.01), and the incidence of skeletal (vertebral) abnormalities was higher in triploids (Triploids STD 31 ± 0.90%; HFM 15 ± 1.44%) than in diploids (Diploids STD 4 ± 0.80%; HFM 4 ± 0.83%). The HFM diet gave a significant reduction in the numbers of triploid salmon with vertebral anomalies in comparison with the triploids fed the STD diet possibly as a result of differences in phosphorus bioavailability between the two diets. Overall, the incidence of skeletal deformities was lower than reported in previous studies (Diploids 20+%, Triploids 40+%), possibly as a result of the combination of rearing at low-temperature and phosphorus-rich diets being used in the present study.

10.1371/journal.pone.0194340

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Citations (31)