LotaV3, Main, Exploration, bibRecord, 000E48

Development of fish mercury concentrations in Finnish reservoirs from 1979 to 1994

Identifieur interne : 000E48 ( Main/Exploration ); précédent : 000E47; suivant : 000E49

Development of fish mercury concentrations in Finnish reservoirs from 1979 to 1994

Auteurs : P. Porvari [Finlande]

Source :

Science of the Total Environment [ 0048-9697 ] ; 1998.

RBID : ISTEX:99E0A1710B453F422573266908887341D86F3F62

Descripteurs français

KwdFr :
- Animaux (MeSH), Concentration en ions d'hydrogène (MeSH), Eau douce (analyse), Facteurs temps (MeSH), Finlande (MeSH), Mercure (analyse), Modèles statistiques (MeSH), Poissons (métabolisme), Polluants chimiques de l'eau (analyse), Spécificité d'espèce (MeSH), Surveillance de l'environnement (MeSH).
MESH :
- analyse : Eau douce, Mercure, Polluants chimiques de l'eau.
- métabolisme : Poissons.
Pascal (Inist)
- Accumulation biologique, Animaux, Concentration en ions d'hydrogène, Facteurs temps, Finlande, Lac artificiel, Mercure, Modèle mathématique, Modèles statistiques, Pisces, Qualité eau, Spécificité d'espèce, Surveillance de l'environnement, Teneur.
Wicri :
- geographic : Finlande.
- topic : Mercure.

English descriptors

KwdEn :
- Animals (MeSH), Artificial lake, Biological accumulation, Content, Environmental Monitoring (MeSH), Finland, Finland (MeSH), Fishes (metabolism), Fresh Water (analysis), Hydrogen-Ion Concentration (MeSH), Mathematical model, Mercury, Mercury (analysis), Models, Statistical (MeSH), Pisces, Species Specificity (MeSH), Time Factors (MeSH), Water Pollutants, Chemical (analysis), Water quality.
MESH :
- chemical , analysis : Mercury, Water Pollutants, Chemical.
- geographic : Finland.
- analysis : Fresh Water.
- metabolism : Fishes.
- Animals, Environmental Monitoring, Hydrogen-Ion Concentration, Models, Statistical, Species Specificity, Time Factors.

Abstract

Mercury (Hg) concentrations in burbot (Lota lota), perch (Perca fluviatilis), northern pike (Esox lucius), roach (Rutilus rutilus), whitefish (Coregonus lavaretus) and peled (C. peled) were monitored in 18 reservoirs situated in western and northern Finland over a period of 16 years (1979–1994). The reservoirs were impounded from 1964 to 1980. The surface areas ranged between 1 and 417 km2. Data from downstream sites and reference lakes were compared to reservoir mercury data. Generally, fish Hg concentrations in reservoirs exceeded those in natural lakes. Shortly after inundation, fish mercury concentrations clearly increased and remain 15–25 years above background concentrations. The mean Hg concentrations in standardized 1 kg pike from 1989 to 1993 was 0.45 mg/kg in natural lakes and 0.58 mg/kg in reservoirs. The 1 mg/kg fish Hg level recommended by health authorities as the upper limit for human consumption was still exceeded in two reservoirs 20 years old or more. The two largest reservoirs (24 and 27 years old in 1994) with significant commercial fishing had Hg levels below 0.5 mg/kg in all fish species studied. Statistical models for predicting the Hg concentrations in the weight standardized pike were verified with the observed data. For most of the reservoirs, predictions from models based on pH, organic matter (COD) in water, the extent of water level regulation and reservoir age agreed well with observed data. In the most southern, new (under 20 years old) and heavily regulated reservoirs, pike Hg concentration followed a logarithmic function of reservoir age. Model predictions of mercury in pike in the planned Vuotos reservoir (in northern Finland) predicted that Hg would exceed 1 mg/kg Hg for the first 12 years after the flooding.

Url:

https://api.istex.fr/document/99E0A1710B453F422573266908887341D86F3F62/fulltext/pdf

DOI: 10.1016/S0048-9697(98)00101-6

Affiliations:

Finlande

Le document en format XML

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<term>Content</term>
<term>Environmental Monitoring (MeSH)</term>
<term>Finland</term>
<term>Finland (MeSH)</term>
<term>Fishes (metabolism)</term>
<term>Fresh Water (analysis)</term>
<term>Hydrogen-Ion Concentration (MeSH)</term>
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<term>Mercury (analysis)</term>
<term>Models, Statistical (MeSH)</term>
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<term>Water Pollutants, Chemical (analysis)</term>
<term>Water quality</term>
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<term>Finlande (MeSH)</term>
<term>Mercure (analyse)</term>
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<term>Polluants chimiques de l'eau (analyse)</term>
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<front><div type="abstract" xml:lang="en">Mercury (Hg) concentrations in burbot (Lota lota), perch (Perca fluviatilis), northern pike (Esox lucius), roach (Rutilus rutilus), whitefish (Coregonus lavaretus) and peled (C. peled) were monitored in 18 reservoirs situated in western and northern Finland over a period of 16 years (1979–1994). The reservoirs were impounded from 1964 to 1980. The surface areas ranged between 1 and 417 km2. Data from downstream sites and reference lakes were compared to reservoir mercury data. Generally, fish Hg concentrations in reservoirs exceeded those in natural lakes. Shortly after inundation, fish mercury concentrations clearly increased and remain 15–25 years above background concentrations. The mean Hg concentrations in standardized 1 kg pike from 1989 to 1993 was 0.45 mg/kg in natural lakes and 0.58 mg/kg in reservoirs. The 1 mg/kg fish Hg level recommended by health authorities as the upper limit for human consumption was still exceeded in two reservoirs 20 years old or more. The two largest reservoirs (24 and 27 years old in 1994) with significant commercial fishing had Hg levels below 0.5 mg/kg in all fish species studied. Statistical models for predicting the Hg concentrations in the weight standardized pike were verified with the observed data. For most of the reservoirs, predictions from models based on pH, organic matter (COD) in water, the extent of water level regulation and reservoir age agreed well with observed data. In the most southern, new (under 20 years old) and heavily regulated reservoirs, pike Hg concentration followed a logarithmic function of reservoir age. Model predictions of mercury in pike in the planned Vuotos reservoir (in northern Finland) predicted that Hg would exceed 1 mg/kg Hg for the first 12 years after the flooding.</div>
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Serveur d'exploration Lota lota

Development of fish mercury concentrations in Finnish reservoirs from 1979 to 1994

Development of fish mercury concentrations in Finnish reservoirs from 1979 to 1994

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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