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Sökning: WFRF:(Förlin Lars 1950 ) > Tidskriftsartikel > Bignert A.

  • Resultat 1-7 av 7
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1.
  • Ericson, Y, et al. (författare)
  • Faktablad från Integrerad kustfiskövervakning: Holmön (Bottniska viken) 1989-2015.
  • 2016
  • Ingår i: Faktablad 2016 från Inst för Akvatiska Resurser, SLU. ; :2016: 2
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Faktabladet presenterar resultat och bedömningar från den integrerade kustfiskövervakningen vid Holmön under tidsperioden 1989-2015. Övervakningen visar för varje år ett alltmer påverkat hälsotillstånd hos abborre trots att de flesta analyserade metaller och organiska miljögifter visar nedåtgående trender eller oförändrade halter. Den tydliga och successiva påverkan som ses på hälsotillståndet på individnivå har ännu inte resulterat i några påtagliga förändringar på bestånds- och samhällsnivå.
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2.
  • Gustafsson, Johan, et al. (författare)
  • Correlating seasonal changes of naturally produced brominated compounds to biomarkers in perch from the Baltic Sea
  • 2021
  • Ingår i: Aquatic Toxicology. - : Elsevier BV. - 0166-445X .- 1879-1514. ; 240
  • Tidskriftsartikel (refereegranskat)abstract
    • Hydroxylated polybrominated diphenyl ethers (OH-PBDEs), naturally produced by algae and cyanobacteria in the Baltic Sea, are potent disrupters of energy metabolism as well as endocrine disruptors and neurotoxins. In this study, European perch (Perca fluviatilis) from the Baltic Sea were sampled from May until October. OH-PBDEs and ten biomarkers were measured in each individual (n = 84 over 18 sampling time points) to study potential correlations between exposure to OH-PBDEs and changes in biomarkers. Several biomarkers showed significant non-linear seasonal variation. In the perch, ethoxyresorufin-O-deethylase (EROD) activity, plasma lactate concentration, and plasma glucose concentration showed a significant positive log-linear correlation with OH-PBDEs, whereas lipid percentage and liver somatic index showed a significant negative log-linear correlation with OH-PBDEs. These results strengthen the concern that OH-PBDEs could cause negative health effects for fish in the Baltic Sea.
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3.
  • Hanson, N., et al. (författare)
  • Ecological changes as a plausible explanation for differences in uptake of contaminants between European perch and eelpout in a coastal area of the Baltic Sea
  • 2020
  • Ingår i: Environmental Toxicology and Pharmacology. - : Elsevier BV. - 1382-6689 .- 1872-7077. ; 80
  • Tidskriftsartikel (refereegranskat)abstract
    • Unexpected increasing trends in the concentration of contaminants in European perch (Perca fluviatilis) and in activity of ethoxyresorufin-O-deethylase (EROD) in European perch and eelpout (Zoarces viviparus) have been observed at a Swedish coastal reference site. This study uses data from different sources to investigate plausible explanations. The results showed that a change in diet and an improved overall condition coincide with an increase in mercury in European perch. Furthermore, an increase in several organic contaminants in European perch coincided with the introduction of an invasive deep-burrowing polychaete, which likely contributed to the release of contaminants through bioturbation. The increase in EROD-activity in both species seems to be related to contaminants that reach the fish through the water rather than the diet. The results show that for contaminants that are taken up via the diet, trends in contamination can be opposite for different species of fish in the same area. © 2020
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4.
  • Hansson, T., et al. (författare)
  • Long-term monitoring of the health status of female perch (Perca fluviatilis) in the Baltic Sea shows decreased gonad weight and increased hepatic EROD activity
  • 2006
  • Ingår i: Aquatic Toxicology. - : Elsevier BV. - 0166-445X. ; 79:4, s. 341-355
  • Tidskriftsartikel (refereegranskat)abstract
    • Annual investigations of the health status of female perch (Perca fluviatilis) were performed during 8-13 years in order to detect long-term, large-scale changes in the Baltic Sea. These background data are also meant to be used as baselines in recipient investigations at various point sources in the Baltic Sea. Fish were sampled at three coastal sites in Sweden: two in the Baltic Proper (since 1988) and one in the Bothnian Bay (since 1993). In all, 19 biochemical, physiological and histopathological variables were measured. By reflecting central functions of life, such as red blood cell functions, immune defence, liver function, biotransformation processes, intermediary metabolism, ion balance, and reproduction, the selected variables give a good picture of the health status of the fish. The most important observations were strong trends towards decreased gonadosomatic index (relative gonad size) and increased hepatic EROD activity in female perch in the Baltic Proper. Most of the other variables varied little between the years. The reduced gonad size and the EROD induction indicate that factors in the environment, e.g. the occurrence of pollutants, affect important physiological functions, such as reproduction and biotransformation processes, in fish even in a reference area in the Baltic Proper. It is urgent to make further studies in order to identify which pollutant(s) or other possible cause(s) are responsible for the observed biological effects. (c) 2006 Elsevier B.V. All rights reserved.
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5.
  • Ronisz, Dan, et al. (författare)
  • Thirteen years of monitoring selected biomarkers in Eelpout (Zoarces viviparus) at reference site in the Fjällbacka Archipelago on the Swedish West Coast
  • 2005
  • Ingår i: Aquatic Ecosystem Health & Management. - : Michigan State University Press. - 1463-4988 .- 1539-4077. ; 8:2, s. 175 - 184
  • Tidskriftsartikel (refereegranskat)abstract
    • Several biomarkers in female and male eelpout (Zoarces viviparus) were measured at Fjällbacka, a reference site on the Swedish west coast from 1989 to 2001. Standardised procedures for sampling and measurements were used. Some of the biomarkers were largely stable through the years, for example, condition factor, blood plasma chloride concentration, white blood cell count, percentage of lymphocytes, activities of glutathione-S-transferase and glutathione reductase. Others showed greater variations but not significant trends, for example, percentage of granulocytes and activity of catalase and ethoxyresorufin-O-deethylase activity. Three variables in female eelpout showed a statistically significant downward trend from 1989 to 2001, hematocrit, body weight and length. The change in hematocrit was probably related to decreased stress due to improved sampling techniques, but the reason for changes in weight and length remain unknown. There is a need to evaluate the area for pollutants. The results indicate that there have not been any major large-scale changes in the aquatic environment affecting the fish health at the investigated site
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6.
  • Sandstrom, O., et al. (författare)
  • Three decades of Swedish experience demonstrates the need for integrated long-term monitoring of fish in marine coastal areas
  • 2005
  • Ingår i: Water Quality Research Journal of Canada. - 1201-3080. ; 40:3, s. 233-250
  • Tidskriftsartikel (refereegranskat)abstract
    • The first attempts to monitor coastal fish in Sweden were made in the 1960s and 1970s. Ecological, physiological, biochemical and environmental chemistry data were collected in separate projects. When the National Marine Monitoring Programme was revised in 1992, a new strategy was introduced for assessments of long-term trends in coastal fish communities. Annual integrated monitoring of contaminants, biomarkers and population and community indicators of ecosystem health was started in selected areas using common sentinel species. Data from one monitoring area at the coast of the Baltic proper are analyzed in this paper. The results have shown a shift in fish community structure indicating changes in ecosystem productivity. Trends have been detected in growth rate (positive) and relative gonad size (negative) in perch (Perca fluviatilis), suggesting a metabolic disturbance according to the predictive response model developed for interpretations. One factor which may have contributed to the reduced GSI was a decrease in mean age of sampled fish during the period of study. Chemical exposure was indicated by a 3-fold increase of EROD activity during the monitored 15-year period. However, concentrations of most measured contaminants in perch have decreased during the same period. The experience of the integrated approach has shown that a tentative analysis of cause and environmental significance could be made, improving the assessment, but there still remain unsolved questions to be answered in follow-up studies. The analysis has also shown the importance of long-term monitoring at several levels of biological organization to distinguish between natural variation and low-level effects on ecosystems.
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7.
  • Tairova, Z., et al. (författare)
  • Persistent organic pollutants and related biological responses measured in coastal fish using chemical and biological screening methods
  • 2017
  • Ingår i: Journal of Toxicology and Environmental Health, Part A. - : Informa UK Limited. - 1528-7394 .- 0098-4108 .- 1087-2620. ; 80:16-18, s. 862-880
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of this study was to investigate the spatial distribution, levels of dioxin-like compounds (DLC), and biological responses in two fish species. The viviparous eelpout (Zoarces viviparus) was collected from various locations in the Baltic Sea and in fjords of Kattegat and Skagerrak, while shorthorn sculpin (Myoxocephalus scorpius) was obtained at the polychlorinated biphenyl (PCB) polluted site in North West Greenland. Significant differences were detected both in contaminant levels and relative contributions from either polychlorinated dibenzodioxins (PCDD) or polychlorinated dibenzofurans (PCDF or furans) and mono-ortho- and non-ortho (coplanar) polychlorinated biphenyls (dl-PCB). Fish from the eastern Baltic Sea generally displayed higher contributions from PCDD/F compared to dl-PCB, whereas dl-PCB were generally predominated in fish from Danish, Swedish, and German sites. Levels of dl-PCB in muscle tissues were above OSPAR environmental assessment criteria (EAC) for PCB118, indicating a potential risk of adverse biological effects in the ecosystem, whereas levels of the total WHO-TEQs were below threshold for sea food suggesting limited risks for humans. No significant relationships between levels of DLC (expressed as WHO-TEQ), and biological responses such as the induction of CYP1A enzymatic activity and fry reproductive disorders were observed in eelpout. No marked relationship between WHO-TEQ and combined biological aryl hydrocarbon receptor-mediated transactivity (expressed as AhR-TEQ) was noted. However, there was a positive correlation between polycyclic aromatic hydrocarbon (PAH) metabolites and induction of CYP1A activity, suggesting that PAH exhibited greater potential than DLC to produce biological effects in eelpout from the Baltic Sea.
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  • Resultat 1-7 av 7

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