The utility of predatory fish in biomanipulation of deep reservoirs

Vašek, Mojmír; Prchalová, Marie; Peterka, Jiří; Ketelaars, Henk A. M.; Wagenvoort, Arco J.; Čech, Martin; Draštík, Vladislav; Říha, Milan; Jůza, Tomáš; Kratochvíl, Michal; Mrkvička, Tomáš; Blabolil, Petr; Boukal, David S.; Duras, Jindřich; Kubečka, Jan

doi:10.1016/j.ecoleng.2012.12.100

Cited by 33 publications

(29 citation statements)

References 51 publications

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“…Effects on higher trophic levels were not investigated in the papers we studied, but from other papers it is known that mixing may also benefit fish abundance (e.g. Vašek et al 2013). …”

Section: Zooplanktonmentioning

confidence: 99%

Artificial mixing to control cyanobacterial blooms: a review

et al. 2015

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Artificial mixing has been used as a measure to prevent the growth of cyanobacteria in eutrophic lakes and reservoirs for many years. In this paper, we give an overview of studies that report on the results of this remedy. Generally, artificial mixing causes an increase in the oxygen content of the water, an increase in the temperature in the deep layers but a decrease in the upper layers, while the standing crop of phytoplankton (i.e. the chlorophyll content per m 2 ) often increases partly due to an increase in nutrients entrained from the hypolimnion or resuspended from the sediments. A change in composition from cyanobacterial dominance to green algae and diatoms can be observed if the imposed mixing is strong enough to keep the cyanobacteria entrained in the turbulent flow, the mixing is deep enough to limit light availability and the mixing devices are well distributed horizontally over the lake. Both models and experimental studies show that if phytoplankton is entrained in the turbulent flow and redistributed vertically over the entire depth, green algae and diatoms win the competition over (colonial) cyanobacteria due to a higher growth rate and reduced sedimentation losses. The advantage of buoyant cyanobacteria to float up to the illuminated upper layers is eradicated in a wellmixed system.

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“…Effects on higher trophic levels were not investigated in the papers we studied, but from other papers it is known that mixing may also benefit fish abundance (e.g. Vašek et al 2013). …”

Section: Zooplanktonmentioning

confidence: 99%

Artificial mixing to control cyanobacterial blooms: a review

et al. 2015

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“…Mehner et al (2004) recommended that the total fish biomass should have a 30% proportion of piscivores in order to balance production of small-bodied planktivorous fish efficiently. In highly productive (eutrophic) lakes, the relative proportion of piscivorous fish tends to be low and enhancement and maintenance of these species requires intense stocking accompanied by enforced angling restrictions (Vašek et al, 2013). Though the latter condition should have been fulfilled at Hamry, where angling is strictly prohibited, stocking of species such as pike and zander appeared to be counter-productive as regards biomanipulation.…”

Section: Impact Of Biomanipulation On the Fish Assemblagementioning

confidence: 98%

“…Many previous biomanipulation projects have attempted to reduce smaller planktivorous fish indirectly through increasing the density and biomass of piscivorous fish (e.g. Carpenter et al, 2001;Lathrop et al, 2002;Skov et al, 2002;Mehner, 2010;Vašek et al, 2013). Mehner et al (2004) recommended that the total fish biomass should have a 30% proportion of piscivores in order to balance production of small-bodied planktivorous fish efficiently.…”

Section: Impact Of Biomanipulation On the Fish Assemblagementioning

confidence: 99%

“…Roach (Rutilus rutilus) and common bream (Abramis brama) are the primary targets for biomanipulation in North-West European temperate lakes (Hansson et al, 1998;Mehner et al, 2002;Lammens et al, 2002;Van de Bund and Van Donk, 2002;Søndergaard et al, 2008) as they not only feed on zooplankton but also disturb sediment in their search for sediment-dwelling invertebrates (Boll et al, 2012;Adámek and Maršálek, 2013). In addition to fish removal, the density and biomass of predators, such as pike (Esox lucius), zander (Sander lucioperca) and asp (Aspius aspius), are also frequently increased in order to further reduce populations of small planktivorous fish (Lathrop et al, 2002;Skov and Nilsson, 2007;Vašek et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Use of multiple fish-removal methods during biomanipulation of a drinking water reservoir – Evaluation of the first four years

et al. 2016

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“…If the aquatic ecosystem (especially nutrient loading) is not ready to swing to a clear state, fish management (commonly known as biomanipulation) has proved to be only a temporary measure (Sønder-gaard et al 2008;Vašek et al 2013). After nutrient reduction, Jeppesen et al (2005) found a natural response of fish community structure and biomass within 10 years.…”

Section: Food Webmentioning

confidence: 99%

How to combat cyanobacterial blooms: strategy toward preventive lake restoration and reactive control measures

Stroom

Kardinaal

2016

Aquat Ecol

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Water managers worldwide are facing the serious problem of dense blooms of cyanobacteria in surface waters. In the quest for the optimal method to combat cyanobacterial dominance, many questions and many possible solutions arise. This paper presents a three-phase strategy to fight harmful cyanobacterial proliferation. Water managers who apply this strategy can generate a tailor-made set of measures. The three phases consist of (1) defining the ecological water quality targets of the waterbody in question, (2) assessing its current ecological state, and (3) selecting which measures will yield optimal results. The paper provides assistance in the quantitative diagnosis of the state of both shallow and deep temperate freshwater lakes by means of a lake system analysis, and presents a survey of measures. Measures are divided into two sets. Preventive measures are based on switching to a clear state (shallow lake) or reducing the overall cyanobacterial biomass (deep lake). They are subdivided into nutrient reduction, hydromorphological adjustments, and food web management. Concerning nutrient reduction, in many situations phosphorus management alone should suffice. Nitrogen management can be important to increase the species diversity of macrophytes, or to relieve downstream (marine) consequences. Control measures (including mitigation) have a direct impact on cyanobacterial blooms by biomass removal, flushing, or mixing; however, the number of proven technologies is limited.

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The utility of predatory fish in biomanipulation of deep reservoirs

Cited by 33 publications

References 51 publications

Artificial mixing to control cyanobacterial blooms: a review

Artificial mixing to control cyanobacterial blooms: a review

Use of multiple fish-removal methods during biomanipulation of a drinking water reservoir – Evaluation of the first four years

How to combat cyanobacterial blooms: strategy toward preventive lake restoration and reactive control measures

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