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Description
  • Sledovali jsme poproudnou migraci raných vývojových stádií kaprovitých ryb vzhledem k její k prostorovému rozložení. Denzita driftu a průměrná velikost těla byla srovnávána mezi čtyřmi stanicemi rozmístěnými v různých vzdálenostech od břehové linie. Dominantním druhem byl cejn velký, následovaný cejnkem malým a ploticí obecnou. 95% driftujících ryb byly larvy. Většina ryb driftovala 1 až 3 m od břehu, naopak uprostřed toku driftovalo velice málo ryb. Většina ryb driftovala v noci. Velikost driftujících ryb byla pozitivně korelována se vzdáleností od břehu. Mladší larvy driftovaly blíže u břehu než starší larvy. Domníváme se, že prostorová distribuce driftujících ryb je ovlivněna jejich pohybovými schopnostmi a ryby mohou vstupovat do proudu za účelem aktivního transportu. (cs)
  • We investigated downstream drift of YOY cyprinid fishes to ascertain the spatial dynamics of this mode of transport. Drift density and mean body size were compared among four sampling stations positioned at different distances from the riverbank. Common bream (Abramis brama) was the dominant species (76%), followed by silver bream (Abramis bjoerkna) and roach (Rutilus rutilus). Ninety-five percent of drifting fish were larvae. Most fish drifted 1 to 3 m from the shore, relatively few fish drifted in midchannel and most fish drifted at night. Body size of drifting fishes was positively correlated with distance from the bank. Younger larvae drifting near to the bank and older larvae and early juveniles drifting in midchannel. We propose that the spatial distribution of drifting fish is linked to their swimming ability and fish larvae may enter the river current as a means of active transport.
  • We investigated downstream drift of YOY cyprinid fishes to ascertain the spatial dynamics of this mode of transport. Drift density and mean body size were compared among four sampling stations positioned at different distances from the riverbank. Common bream (Abramis brama) was the dominant species (76%), followed by silver bream (Abramis bjoerkna) and roach (Rutilus rutilus). Ninety-five percent of drifting fish were larvae. Most fish drifted 1 to 3 m from the shore, relatively few fish drifted in midchannel and most fish drifted at night. Body size of drifting fishes was positively correlated with distance from the bank. Younger larvae drifting near to the bank and older larvae and early juveniles drifting in midchannel. We propose that the spatial distribution of drifting fish is linked to their swimming ability and fish larvae may enter the river current as a means of active transport. (en)
Title
  • Spatial distribution of drifting cyprinid fishes in a shallow lowland river
  • Prostorové rozmístění driftujících kaprovitých ryb v mělkém nížinném toku (cs)
  • Spatial distribution of drifting cyprinid fishes in a shallow lowland river (en)
skos:prefLabel
  • Spatial distribution of drifting cyprinid fishes in a shallow lowland river
  • Prostorové rozmístění driftujících kaprovitých ryb v mělkém nížinném toku (cs)
  • Spatial distribution of drifting cyprinid fishes in a shallow lowland river (en)
skos:notation
  • RIV/68081766:_____/04:00101668!RIV/2005/AV0/A67005/N
http://linked.open.../vavai/riv/strany
  • 395;407
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(IAB6093106), P(KSK6005114), Z(AV0Z6093917)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 587278
http://linked.open...ai/riv/idVysledku
  • RIV/68081766:_____/04:00101668
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • 0+ juvenile fish;downstream drift;larval dispersal (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [859058C98830]
http://linked.open...i/riv/nazevZdroje
  • Archiv für Hydrobiologie
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 159
http://linked.open...iv/tvurceVysledku
  • Reichard, Martin
  • Smith, C.
  • Jurajda, Pavel
http://linked.open...n/vavai/riv/zamer
issn
  • 0003-9136
number of pages
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