LotaV3, Main, Exploration, bibRecord, 000D93

Effects of eutrophication on fish and fisheries in Finnish lakes: a survey based on random sampling

Identifieur interne : 000D93 ( Main/Exploration ); précédent : 000D92; suivant : 000D94

Effects of eutrophication on fish and fisheries in Finnish lakes: a survey based on random sampling

Auteurs : J. Tammi ; Antti Lappalainen [Finlande] ; J. Mannio ; Martti Rask [Finlande] ; J. Vuorenmaa

Source :

Fisheries Management and Ecology [ 0969-997X ] ; 1999-06.

RBID : ISTEX:66FB1040D234CDE9A200CF11F81A8F57582352ED

Descripteurs français

Wicri :
- geographic : Finlande.

English descriptors

KwdEn :
- Finland, eutrophication, fish, fisheries, lake survey, total phosphorus.

Abstract

Abstract The effects of eutrophication on fish and fisheries in Finnish lakes were determined by an extensive lake survey conducted in 1995 and 1996. The study lakes (873) were chosen by stratified random sampling from all Finnish lakes with a surface area ≥ 0.04 km2 (29 515 lakes in all). The chemical parameters of the lake water were determined for water samples taken in autumn 1995. Information on the fish stocks of the study lakes was collected by means of a postal questionnaire sent to local fishing authorities and lake owners. The results show that the fish community structure is cyprinid dominated, reflecting eutrophication in 2100 lakes (7% of all the target lakes). Strong fouling of the fishing gear, as well as a great abundance of unwanted species in the catch of passive gears, were considered to be a continuous problem in more than 10% of the lakes. Roach, Rutilus rutilus (L.), and bream, Abramis brama (L.), were the most common species to have increased in abundance in the study lakes, whereas burbot, Lota lota (L.), and vendace, Coregonus albula (L.), decreased, especially in highly eutrophic lakes. High total phosphorus and cyprinid dominance in lakes were found mainly in the most intensive agricultural regions in the western and southern parts of Finland.

Url:

https://api.istex.fr/document/66FB1040D234CDE9A200CF11F81A8F57582352ED/fulltext/pdf

DOI: 10.1046/j.1365-2400.1999.00152.x

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Abstract  The effects of eutrophication on fish and fisheries in Finnish lakes were determined by an extensive lake survey conducted in 1995 and 1996. The study lakes (873) were chosen by stratified random sampling from all Finnish lakes with a surface area ≥ 0.04 km2 (29 515 lakes in all). The chemical parameters of the lake water were determined for water samples taken in autumn 1995. Information on the fish stocks of the study lakes was collected by means of a postal questionnaire sent to local fishing authorities and lake owners. The results show that the fish community structure is cyprinid dominated, reflecting eutrophication in 2100 lakes (7% of all the target lakes). Strong fouling of the fishing gear, as well as a great abundance of unwanted species in the catch of passive gears, were considered to be a continuous problem in more than 10% of the lakes. Roach, Rutilus rutilus (L.), and bream, Abramis brama (L.), were the most common species to have increased in abundance in the study lakes, whereas burbot, Lota lota (L.), and vendace, Coregonus albula (L.), decreased, especially in highly eutrophic lakes. High total phosphorus and cyprinid dominance in lakes were found mainly in the most intensive agricultural regions in the western and southern parts of Finland.</div>
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Effects of eutrophication on fish and fisheries in Finnish lakes: a survey based on random sampling

Effects of eutrophication on fish and fisheries in Finnish lakes: a survey based on random sampling

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