zhannat

• Falk-Andersson, Jannike; Tairova, Zhanna; Drægni, Tora Tokvam & Haarr, Marthe Larsen (2021). Methods for determining the geographical origin and age of beach litter: Challenges and opportunities. Marine Pollution Bulletin. ISSN 0025-326X. 172. doi: 10.1016/j.marpolbul.2021.112901. Fulltekst i vitenarkiv Vis sammendrag

  Beach litter analysis is a cost-effective tool to identify litter sources and subsequent management actions. However, standard beach litter protocols are not generally developed to identify litter's origins and age. Data from Svalbard (North Atlantic/ Arctic Ocean) were therefore used to explore reliable methods to fill this knowledge gap. Written text and country specific brands, as well as printed production or expiry dates proved the most efficient and reliable identifiers. The use of product design and logos considerably increased the proportion of items that could be sourced (by 19%) and dated (by 22%). The successful use of these is defined by the expertise of the analysing team and may introduce bias. The bias can be reduced by developing picture guides and involving stakeholders. The analyses showed that littering is on-going and that the area's major fishing nations, Norway and Russia, dominated the identified litter (38% and 14%, respectively).

• Dale, Karina; Müller, Mette Bjørge; Tairova, Zhanna; Khan, Essa Ahsan; Hatlen, Kristin & Grung, Merete [Vis alle 15 forfattere av denne artikkelen] (2019). Contaminant accumulation and biological responses in Atlantic cod (Gadus morhua) caged at a capped waste disposal site in Kollevåg, Western Norway. Marine Environmental Research. ISSN 0141-1136. 145, s. 39–51. doi: 10.1016/j.marenvres.2019.02.003. Fulltekst i vitenarkiv Vis sammendrag

  The aim of this study was to assess whether fish in Kollevåg, a sheltered bay on the western coast of Norway, previously utilized as a waste disposal site, could be affected by environmental contaminants leaking from the waste. Farmed, juvenile Atlantic cod (Gadus morhua) were caged for six weeks at three different locations in Kollevåg bay and at one reference location. Sediments and cod samples (bile and liver) were analyzed for polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), brominated flame retardants (BFRs), per-and polyfluoroalkyl substances (PFASs) and polycyclic aromatic hydrocarbon (PAH) metabolites, revealing a contamination gradient at the four stations. Furthermore, hepatosomatic index (HSI) and Fulton's condition factor (CF) were significantly lower in cod caged closest to the disposal site. Levels and activities of biomarker proteins, such as vitellogenin (Vtg), metallothionein (Mt), and biotransformation and oxidative stress enzymes, including cytochrome P450 1a and 3a (Cyp1a, Cyp3a), glutathione s-transferase (Gst) and catalase (Cat), were quantified in blood plasma and liver tissue. Hepatic Cat and Gst activities were significantly reduced in cod caged at the innermost stations in Kollevåg, indicating modulation of oxidative stress responses. However, these results contrasted with reduced hepatic lipid peroxidation. Significant increases in transcript levels were observed for genes involved in lipid metabolism (fasn and acly) in cod liver, while transcript levels of ovarian steroidogenic enzyme genes such as p450scc, cyp19, 3β-hsd and 20β-hsd showed significant station-dependent increases. Cyp1a and Vtg protein levels were however not significantly altered in cod caged in Kollevåg. Plasma levels of estradiol (E2) and testosterone (T) were determined by enzyme immunoassay (EIA) and showed elevated E2 levels, but only at the innermost station. We conclude that the bay of Kollevåg did not fullfill adequate environmental condition based on environmental quality standards (EQSs) for chemicals in coastal waters. Following a six weeks caging period, environmental contaminants accumulated in cod tissues and effects were observed on biomarker responses, especially those involved in reproductive processes in cod ovary.

• Tairova, Zhanna; Frantzen, Marianne; Mosbech, Anders; Arukwe, Augustine & Gustavson, Kim (2019). Effects of water accommodated fraction of physically and chemically dispersed heavy fuel oil on beach spawning capelin (Mallotus villosus). Marine Environmental Research. ISSN 0141-1136. 147, s. 62–71. doi: 10.1016/j.marenvres.2019.03.010. Fulltekst i vitenarkiv Vis sammendrag

  Due to a northward shift in off-shore activities, including increased shipping traffic and oil and gas exploration there is a growing focus on the potential effects of oil pollution on Arctic marine ecosystems. Capelin (Mallotus villosus) is a small fish and a member of the smelt family, and is a key species in the marine food chain. Capelin are seasonally abundant in the Northern Atlantic and in coastal Arctic waters, e.g. in western Greenland and in the Barents Sea, where it undertakes aggregated spawning in the intertidal and subtidal zone. To study the possible effects of oil pollution on the physiology and development of early life stages in capelin, freshly fertilised capelin eggs were exposed to a water accommodated fraction of physically (WAF) and chemically (CEWAF) dispersed heavy fuel oil (IFO30) for 72 h. Subsequent mortality, hatching success, larvae malformations, growth and CYP1A/EROD activity was measured over a 4-week period. The nominal exposure concentrations of WAF and CEWAF were between 0.02 and 14.5 mg total hydrocarbon content (THC) L−1 and 0.5–304 mg THC L−1, respectively. Egg mortality correlated significantly with WAF exposure concentration. The proportions of hatched eggs decreased with increasing CEWAF exposure concentration. Further, the percentage of malformed larvae with craniofacial abnormalities, body axis defects, generally under developed larvae, reduced total body length (dwarfs), correlated significantly with exposure concentrations in both CEWAF and WAF treatments. The four types of the predominant malformations were distributed differently in two parallel experiments. At the biochemical level, we observed a significant relationship between CEWAF exposure concentration and CYP1A/EROD activity in newly hatched larvae and this effect persisted for 3 weeks after the 72 h exposure. We conclude that even short-term exposure to both heavy fuel oil WAF and CEWAF, at environmentally relevant THC concentrations following an oil spill, may induce adverse developmental effects on the vulnerable early life stages of capelin. The mechanisms responsible for the observed effects on mortality, growth and embryo development in capelin eggs and embryos following WAF and CEWAF exposure require further studies.

• Juma, Rashid R; Salum, Nuru Said; Tairova, Zhanna; Strand, Jakob; Bakari, Said Suleiman & Sheikh, Mohammed A (2018). Potential of Periophthalmus sobrinus and Siganus sutor as bioindicator fish species for PAH pollution in tropical waters. Regional Studies in Marine Science. 18, s. 170–176. doi: 10.1016/j.rsma.2017.09.016. Fulltekst i vitenarkiv

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• Goksøyr, Anders; Alendal, Guttorm; Aranguren-Abadía, Libe; Arukwe, Augustine; Blaser, Nello & Brun, Morten [Vis alle 29 forfattere av denne artikkelen] (2019). dCOD 1.0: DECODING THE SYSTEMS TOXICOLOGY OF ATLANTIC COD (GADUS MORHUA) – HIGHLIGHTS SO FAR. Fulltekst i vitenarkiv Vis sammendrag

  The Atlantic cod (Gadus morhua) is an important species in North Atlantic fisheries, as well as coastal and pelagic ecosystems. It is also a widely used indicator species in European monitoring programs. The goal of the dCod 1.0-project is to combine competencies in environmental toxicology, biology, bioinformatics and mathematics across the traditional department boundaries, to create a deeper understanding of the Atlantic cod's adaptations and reactions to stressors in the environment. Building on thorough studies and mapping of the cod genome and long research traditions on the physiology, toxicology and reproduction biology of cod, the dCod project will expand our knowledge with genomics based methods, with studies of how the cod genome responds under different environmental conditions. In dCod 1.0 we have so far generated large amounts of experimental samples and data using in silico (defensome modelling and metabolic reconstruction), in vitro (luciferase reporter assays with cod nuclear receptors and aryl hydrocarbon receptors), ex vivo (precision-cut liver slices), aquaria and field studies, as data sets for bioinformatics analyses and mathematical models that can describe responses based on different scenarios. Overall, the ambition is to create a knowledge-base and a tool for environmental monitoring and risk assessment. Here we will highlight some results and experiences during the first years of the project involving lab and field studies, omics analyses, and transdisciplinary activities. The dCod 1.0 project is funded under the Digital Life Norway initiative of the BIOTEK 2021 program, and the iCod 2.0 project under the ECOSYSTEM program of the Research Council of Norway (project no. 248840 & 244564).

• Goksøyr, Anders; Alendal, Guttorm; Aranguren-Abadía, Libe; Arukwe, Augustine; Blaser, Nello & Brun, Morten [Vis alle 29 forfattere av denne artikkelen] (2019). dCOD 1.0: DECODING THE SYSTEMS TOXICOLOGY OF ATLANTIC COD (GADUS MORHUA) – HIGHLIGHTS SO FAR. Fulltekst i vitenarkiv Vis sammendrag

  The Atlantic cod (Gadus morhua) is an important species in North Atlantic fisheries, as well as coastal and pelagic ecosystems. It is also a widely used indicator species in European monitoring programs. The goal of the dCod 1.0-project is to combine competencies in environmental toxicology, biology, bioinformatics and mathematics across the traditional department boundaries, to create a deeper understanding of the Atlantic cod's adaptations and reactions to stressors in the environment. Building on thorough studies and mapping of the cod genome and long research traditions on the physiology, toxicology and reproduction biology of cod, the dCod project will expand our knowledge with genomics based methods, with studies of how the cod genome responds under different environmental conditions. In dCod 1.0 we have so far generated large amounts of experimental samples and data using in silico (defensome modelling and metabolic reconstruction), in vitro (luciferase reporter assays with cod nuclear receptors and aryl hydrocarbon receptors), ex vivo (precision-cut liver slices), aquaria and field studies, as data sets for bioinformatics analyses and mathematical models that can describe responses based on different scenarios. Overall, the ambition is to create a knowledge-base and a tool for environmental monitoring and risk assessment. In this presentation we will highlight some results and experiences during the first years of the project involving lab and field studies, omics analyses, and transdisciplinary activities. The dCod 1.0 project is funded under the Digital Life Norway initiative of the BIOTEK 2021 program, and the iCod 2.0 project under the ECOSYSTEM program of the Research Council of Norway (project no. 248840 & 244564).

• Dale, Karina; Yadetie, Fekadu; Müller, Mette Helen Bjørge; Tairova, Zhanna; Haarr, Ane & Khan, Essa Ahsan [Vis alle 11 forfattere av denne artikkelen] (2019). Contaminant accumulation and biological responses in Atlantic cod (Gadus morhua) exposed to polycyclic aromatic hydrocarbons and perfluoroalkyl substances. Fulltekst i vitenarkiv
• Dale, Karina; Müller, Mette Helen Bjørge; Tairova, Zhanna; Pampanin, Daniela Maria; Haarr, Ane & Yadetie, Fekadu [Vis alle 13 forfattere av denne artikkelen] (2019). Biological responses of Atlantic cod (Gadus morhua) exposed to polycyclic aromatic hydrocarbons and perfluoroalkyl substances. Fulltekst i vitenarkiv
• Tairova, Zhanna; Müller, Mette Helen Bjørge; Meier, Sonnich; Lie, Kai Kristoffer; Myklatun, Lars & Sørhus, Elin [Vis alle 12 forfattere av denne artikkelen] (2019). Biological effects in Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) exposed to crude oil with and without UV radiation. Fulltekst i vitenarkiv
• Dale, Karina; Müller, Mette Helen Bjørge; Tairova, Zhanna; Pampanin, Daniela Maria; Haarr, Ane & Lille-Langøy, Roger [Vis alle 10 forfattere av denne artikkelen] (2019). Biological responses of Atlantic cod (Gadus morhua) exposed to polycyclic aromatic hydrocarbons (PAHs) and perfluoroalkyl substances (PFASs). Fulltekst i vitenarkiv
• Dale, Karina; Karlsen, Odd Andre; Yadetie, Fekadu; Eide, Marta; Goksøyr, Siri Øfsthus & Abadía, Libe Aranguren [Vis alle 14 forfattere av denne artikkelen] (2018). Ecotoxicological responses in Atlantic cod (Gadus morhua) after caging at a capped waste disposal site in Kollevåg, Western Norway. Fulltekst i vitenarkiv
• Dale, Karina; Karlsen, Odd Andre; Yadetie, Fekadu; Eide, Marta; Goksøyr, Siri Øfsthus & Abadía, Libe Aranguren [Vis alle 14 forfattere av denne artikkelen] (2018). Ecotoxicological responses in Atlantic cod (Gadus morhua) after caging at a capped waste disposal site in Kollevåg, Western Norway. Fulltekst i vitenarkiv
• Goksøyr, Anders; Alendal, Guttorm; Abadía, Libe Aranguren; Arukwe, Augustine; Blaser, Nello & Brun, Morten [Vis alle 35 forfattere av denne artikkelen] (2018). dCOD 1.0: DECODING THE SYSTEMS TOXICOLOGY OF ATLANTIC COD (GADUS MORHUA). Fulltekst i vitenarkiv
• Meier, Sonnich; Donald, Carey; Sørhus, Elin; Perrichon, Prescilla; Laurel, Benjamin J. & Hansen, Bjørn Henrik [Vis alle 17 forfattere av denne artikkelen] (2018). Marine fiske egg er meget følsomme for olje forurensning. Fulltekst i vitenarkiv
• Tairova, Zhanna; Müller, Mette Helen Bjørge; Lyche, Jan Ludvig; Mayer, Ian; Berg, Vidar & Blaser, Nello [Vis alle 14 forfattere av denne artikkelen] (2018). Adverse health effects related to chemical exposure in Atlantic cod (Gadus morhua) from Norwegian fjords. Fulltekst i vitenarkiv
• Tairova, Zhanna & Melteig, Elina (2017). Et udstilling om hvordan man bruger torsk som bioindikator fisk indenfor dCod projekt, på PASSION FOR OCEAN FESTIVALEN. VIPPETANGEN - 26 AUGUST 2017. Et samarbejde med Elina Melteig (Kommunikasjonsrådgiver at Institutt for biovitenskap, Universitetet i Oslo). Fulltekst i vitenarkiv
• Tairova, Zhanna; Müller, Mette Helen Bjørge; Lyche, Jan Ludvig; Mayer, Ian; Blaser, Nello & Brun, Morten [Vis alle 12 forfattere av denne artikkelen] (2017). Adverse effects in Atlantic cod (Gadus morhua) due to environmental exposure to pollutant mixtures from the Oslofjord, Norway. Fulltekst i vitenarkiv
• Dale, Karina; Karlsen, Odd Andre; Yadetie, Fekadu; Eide, Marta; Goksøyr, Siri Øfsthus & Aranguren, Libe [Vis alle 13 forfattere av denne artikkelen] (2017). Ecotoxicological responses in Atlantic cod (Gadus morhua) following caging near a previously capped waste disposal site in Kollevågen, Askøy, Norway. Fulltekst i vitenarkiv
• Dale, Karina; Karlsen, Odd Andre; Yadetie, Fekadu; Eide, Marta; Goksøyr, Siri Øfsthus & Aranguren, Libe [Vis alle 13 forfattere av denne artikkelen] (2017). Ecotoxicological responses in Atlantic cod (Gadus morhua) following caging near a previously capped waste disposal site in Kollevågen, Askøy, Norway. Fulltekst i vitenarkiv
• Goksøyr, Anders; Celander, Malin; Alendal, Guttorm; Aranguren, Libe; Arukwe, Augustine & Blaser, Nello [Vis alle 31 forfattere av denne artikkelen] (2017). dCod 1.0: decoding the systems toxicology of Atlantic cod (Gadus morhua). Fulltekst i vitenarkiv
• Dale, Karina; Karlsen, Odd Andre; Yadetie, Fekadu; Eide, Marta; Goksøyr, Siri Øfsthus & Aranguren, Libe [Vis alle 13 forfattere av denne artikkelen] (2017). Ecotoxicological responses in Atlantic cod (Gadus morhua) following caging near a previously capped waste disposal site in Kollevågen, Askøy, Norway. Fulltekst i vitenarkiv
• Goksøyr, Siri Øfsthus; Goksøyr, Anders; Karlsen, Odd Andre; Yadetie, Fekadu; Eide, Marta & Dale, Karina [Vis alle 33 forfattere av denne artikkelen] (2017). dCod 1.0 decoding the systems toxicology of Atlantic cod. Fulltekst i vitenarkiv
• Tairova, Zhanna; Mayer, Ian; Lyche, Jan Ludvig; Grøsvik, Bjørn Einar; Pampanin, Daniela Maria & Goksøyr, Anders [Vis alle 7 forfattere av denne artikkelen] (2016). Investigating how toxicants affect population-relevant endpoints in Atlantic cod (Gadus morhua) within the dCod project. Fulltekst i vitenarkiv

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