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Statements

Subject Item
n2:RIV%2F68081766%3A_____%2F03%3A67030046%21RIV%2F2004%2FAV0%2FA67004%2FN
rdf:type
n11:Vysledek skos:Concept
dcterms:description
Long-term catch-records from sport anglers can be used as a significant indicator of changes in the distribution and population size of some fish species, as well as the effects of stocking. Evaluating 50-year series of records in the Czech Republic we conclude that there is a marked decrease in the numbers of Barbus barbus, Chondrostoma nasus, Vimba vimba and Leuciscus cephalus, i.e. species chracteristic of the Barbus type fish community. This is the results of a gradual but marked restriction of this community type in individual streams caused by dam construction and canalisation. Catches of Thymallus thymallus have shown a marked increase in size, resulting from the increased extent of suitable waters caused by damming and from intense stocking with yearlings of the species. Catches of Salmo truta m. fario and Thymallus thymallus indicate heavy predation pressure exerted by cormorants (Phalacrocorax carbo) upon these species in a section of one river, the river Dyje below a dam. Long-term catch-records from sport anglers can be used as a significant indicator of changes in the distribution and population size of some fish species, as well as the effects of stocking. Evaluating 50-year series of records in the Czech Republic we conclude that there is a marked decrease in the numbers of Barbus barbus, Chondrostoma nasus, Vimba vimba and Leuciscus cephalus, i.e. species chracteristic of the Barbus type fish community. This is the results of a gradual but marked restriction of this community type in individual streams caused by dam construction and canalisation. Catches of Thymallus thymallus have shown a marked increase in size, resulting from the increased extent of suitable waters caused by damming and from intense stocking with yearlings of the species. Catches of Salmo truta m. fario and Thymallus thymallus indicate heavy predation pressure exerted by cormorants (Phalacrocorax carbo) upon these species in a section of one river, the river Dyje below a dam.
dcterms:title
Anglers' catches as an indicator of fish population status. Anglers' catches as an indicator of fish population status.
skos:prefLabel
Anglers' catches as an indicator of fish population status. Anglers' catches as an indicator of fish population status.
skos:notation
RIV/68081766:_____/03:67030046!RIV/2004/AV0/A67004/N
n3:strany
113;119
n3:aktivita
n5:P n5:Z
n3:aktivity
P(IAA6087704), P(IAA6093105), P(KSK6005114), Z(AV0Z6093917)
n3:cisloPeriodika
1
n3:dodaniDat
n12:2004
n3:domaciTvurceVysledku
n9:7064055 n9:7289189 n9:8602913 n9:8523940
n3:druhVysledku
n17:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
598503
n3:idVysledku
RIV/68081766:_____/03:67030046
n3:jazykVysledku
n15:eng
n3:klicovaSlova
fish community; cormorant; statistics of catches
n3:klicoveSlovo
n4:fish%20community n4:statistics%20of%20catches n4:cormorant
n3:kodStatuVydavatele
PL - Polská republika
n3:kontrolniKodProRIV
[9D9F0464E7B5]
n3:nazevZdroje
Ecohydrology and hydrobiology
n3:obor
n18:GL
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n6:IAA6087704 n6:IAA6093105 n6:KSK6005114
n3:rokUplatneniVysledku
n12:2003
n3:svazekPeriodika
3
n3:tvurceVysledku
Lusková, Věra Lusk, Stanislav Smutný, Martin Halačka, Karel
n3:zamer
n14:AV0Z6093917
s:issn
1642-3593
s:numberOfPages
7