About: Impact of long-term changes in fishery management on the trophic level water quality in Czech fish pond.

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About: Impact of long-term changes in fishery management on the trophic level water quality in Czech fish pond. Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The management of Czech fish ponds changed little from the Middle Ages until the end of the nineteenth century. The intensification of fish production was initiated during the first half of the twentieth century. During the 1930s liming and manuring of the ponds became common. A greater density of stocking led to the use of artificial feeds in the form of pellets and grain. These changes in pond management have led to an increase in fish production from 50 to > 500 kg ha-1 year over the last 5 decades. At the same time, the quality of the water and sediments has been deteriorating, and the functioning of the pond ecosystem has been disturbed. There are now massive blooms of phytoplankton, especially cyanobacteria, accompanied by great fluctuations in the oxygen concentration and pH. Data collected since 1925, when systematic research on the ponds started, allow the mechanisms responsible for the changes to be traced. The management of Czech fish ponds changed little from the Middle Ages until the end of the nineteenth century. The intensification of fish production was initiated during the first half of the twentieth century. During the 1930s liming and manuring of the ponds became common. A greater density of stocking led to the use of artificial feeds in the form of pellets and grain. These changes in pond management have led to an increase in fish production from 50 to > 500 kg ha-1 year over the last 5 decades. At the same time, the quality of the water and sediments has been deteriorating, and the functioning of the pond ecosystem has been disturbed. There are now massive blooms of phytoplankton, especially cyanobacteria, accompanied by great fluctuations in the oxygen concentration and pH. Data collected since 1925, when systematic research on the ponds started, allow the mechanisms responsible for the changes to be traced. (en)
Title	Impact of long-term changes in fishery management on the trophic level water quality in Czech fish pond. Impact of long-term changes in fishery management on the trophic level water quality in Czech fish pond. (en)
skos:prefLabel	Impact of long-term changes in fishery management on the trophic level water quality in Czech fish pond. Impact of long-term changes in fishery management on the trophic level water quality in Czech fish pond. (en)
skos:notation	RIV/67985939:_____/00:18013515!RIV/2003/AV0/A18003/N
http://linked.open.../vavai/riv/strany	23;31
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA206/96/1222), P(IA60547), P(VS96072), Z(AV0Z6005908)
http://linked.open...iv/cisloPeriodika	N/A
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Pechar, Libor
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Botanický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	713200
http://linked.open...ai/riv/idVysledku	RIV/67985939:_____/00:18013515
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	N/A (en)
http://linked.open.../riv/klicoveSlovo	N/A
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[4F5695CCB5C8]
http://linked.open...i/riv/nazevZdroje	Fisheries Management and Ecology
http://linked.open...in/vavai/riv/obor	EF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Photoadaptability of phytoplankton in hypertrophic waters:key factor for species composition and biomass production Laboratory of applied ecology and management of agricultural landscape XXX
http://linked.open...UplatneniVysledku	2000
http://linked.open...v/svazekPeriodika	7
http://linked.open...iv/tvurceVysledku	Pechar, Libor
http://linked.open...n/vavai/riv/zamer	Biodiverzita rostlin: její variabilita, vývoj a funkce na úrovni organismů, společenstev a ekosystémů; její kulturní aspekty; využití v Průhonickém parku
issn	0969-997X
number of pages	9 (xsd:int)

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