Suitability of motorized under-ice seining in selective mass removal of coarse fish

Turunen, Timo; Sammalkorpi, Ilkka; Suuronen, Petri

doi:10.1016/s0165-7836(97)00018-0

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…The mass removal of cyprinids was conducted during 1997-2001 by motorised seining in the autumn or winter and fyke netting in the spring. In seining, the shoals were first located by echosounder and then seined (Turunen et al, 1997;Sammalkorpi, 2000). If no fish aggregations existed, fishing was cancelled.…”

Section: Mass Removalmentioning

confidence: 99%

Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland

Olin

Rask²,

Ruuhijärvi³

et al. 2006

Hydrobiologia

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The effects of biomanipulation were studied in ten Finnish lakes to determine responses in fish and plankton communities and water quality after mass removal of cyprinids. From 1997 to 2001, the fish communities shifted from the dominance of large cyprinids to an explosion of small cyprinids and a higher proportion of piscivores in effectively biomanipulated lakes (>200 kg ha )1 3 yr )1 ). The biomass of cyanobacteria decreased, and the duration of the blooms shortened and shifted towards the autumn. Decreased concentrations and slower cycling of nutrients and increased grazing by cladocerans probably affected the declined biomass of cyanobacteria. Less intensive sediment disturbance and increased phosphorus-retention in fast growing fish biomass may have turned the role of the fish assemblage from 'nutrient recycler' to 'nutrient storage'. Increased potential grazing pressure, higher proportion of edible algae, and lower chlorophyll a:total phosphorus ratio indicated strengthened herbivore control. A high mass removal catch in relation to trophic state, low background turbidity, and bearable external loading favoured the successful biomanipulation, whereas intensive cyprinid reproduction, high nutrient loading and non-algal turbidity hindered the recovery. Three important issues should be noticed before biomanipulation in Finland: (1) careful selection of target lake, (2) well-planned, effective and long-lasting biomanipulation and (3) sustainable management of piscivores.

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Section: Mass Removalmentioning

confidence: 99%

Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland

Olin

Rask²,

Ruuhijärvi³

et al. 2006

Hydrobiologia

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“…After each haul smelt were put on ice. Winter samples were collected from winter seining under the ice cover in February and March 1999 (Turunen et al ., 1997). The seine had 150 m long wings and the height was 13 m. The mesh‐sizes were from 6 to 30 mm (bar length) in the wings and 6 mm (bar length) in the codend.…”

Section: Temporal Mean and Size‐related (Total Length) Variations In mentioning

confidence: 99%

Temporal and size‐related changes in the frequency of empty stomachs in smelt

Vinni

Lappalainen

Horppila

2005

Journal of Fish Biology

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The frequency of empty stomachs (FES) of 3290 smelt Osmerus eperlanus was analysed during winter and two growing seasons. Variations in FES showed that smelt is a daytime feeder and feeding activity is low during the hours of darkness and also during the winter under ice cover. The results suggested further that the diet shifts of smelt are not permanent until the onset of piscivory. # 2005 The Fisheries Society of the British Isles

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“…Jurvelius and Sammalkorpi, 1995;Horppila et al, 1996;Turunen et al, 1997;Peltonen et al, 1999). In very few occasions, e.g.…”

Section: Introductionmentioning

confidence: 99%

Density and biomass of smelt (Osmerus eperlanus) in five Finnish lakes

Jurvelius¹,

Auvinen²,

Kolari³

et al. 2005

Fisheries Research

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Suitability of motorized under-ice seining in selective mass removal of coarse fish

Cited by 10 publications

References 20 publications

Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland

Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland

Temporal and size‐related changes in the frequency of empty stomachs in smelt

Density and biomass of smelt (Osmerus eperlanus) in five Finnish lakes

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