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- W1995008851 abstract "The effects of reducing fish density on the submerged macrophytes in two gravel pit lakes is described. In 1987–1988, 396 kg ha−1 of fish were removed from one lake and the aquatic vegetation cover increased from less than 1% to 93%. The mean standing crop of submerged macrophytes increased from 1.0 g m−2 in 1986 and 1987 (when fish were present) to 46.7 g m−2 in 1988 and 1989 (after fish removal). In 1990 fish were re-introduced into a sampling enclosure in the lake and here the macrophyte standing crop was reduced to 4.8 g m−2 from approximately 47 g m−2. In the second lake, macrophyte cover increased from 48% to 95% after the removal of 356 kg ha−1 of fish. The mean standing crop was 40.4 g m−2 in 1986 and 1987 and this increased to 99.4 g m−2 in 1988 and 1989. In 1990, in a re-stocked enclosure, standing crop was 36.4 g m−2. At the time of the fish removal, bream, Abramis brama (L.), comprised 48% of the fish biomass in the first lake and 19% in the second. This species was considered to be chiefly responsible for inhibiting initial establishment of submerged macrophyte seedlings and for reducing existing stands." @default.
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- W1995008851 date "1992-06-01" @default.
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- W1995008851 title "Changes in the aquatic vegetation of two gravel pit lakes after reducing the fish population density" @default.
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- W1995008851 doi "https://doi.org/10.1016/0304-3770(92)90012-8" @default.
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