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Statements

Subject Item
n2:RIV%2F60077344%3A_____%2F13%3A00392322%21RIV14-AV0-60077344
rdf:type
skos:Concept n11:Vysledek
dcterms:description
The diel horizontal migration (DHM) of fish between the inshore and offshore zones of the Římov Reservoir (Czech Republic, deep, stratified, meso-eutrophic) was investigated by a combination of horizontal and vertical hydroacoustic surveys at 3-h intervals over 48 h and day/night purse seining in August 2007. An overwhelming majority of fish were aggregated within the epilimnetic layer. Considering only the horizontal surveys, cyclic diel fish movements between inshore and offshore habitats were apparent, while the total fish biomass remained constant between day and night. A higher fish biomass was detected in the offshore zone during daytime by both hydroacoustics and purse seining. In contrast, a higher fish biomass was recorded at night in the inshore zone. Bream Abramis brama, roach Rutilus rutilus, and perch Perca fluviatilis dominated the daytime offshore fish assemblage whereas bleak Alburnus alburnus prevailed at night. Bream and roach decreased in abundance at night while perch completely disappeared from the offshore habitat. The diel differences in size distributions and direct catches suggested the population-wide horizontal offshore migration of bleak and inshore migration of all perch during dusk. On the other hand, partial inshore migration of bream and roach adults was observed during dusk (52 and 80%, respectively). The different proportions of offshore residents among species and size classes suggested that differences in size, and, therefore, predation vulnerability, contributed to the observed migration patterns. The diel horizontal migration (DHM) of fish between the inshore and offshore zones of the Římov Reservoir (Czech Republic, deep, stratified, meso-eutrophic) was investigated by a combination of horizontal and vertical hydroacoustic surveys at 3-h intervals over 48 h and day/night purse seining in August 2007. An overwhelming majority of fish were aggregated within the epilimnetic layer. Considering only the horizontal surveys, cyclic diel fish movements between inshore and offshore habitats were apparent, while the total fish biomass remained constant between day and night. A higher fish biomass was detected in the offshore zone during daytime by both hydroacoustics and purse seining. In contrast, a higher fish biomass was recorded at night in the inshore zone. Bream Abramis brama, roach Rutilus rutilus, and perch Perca fluviatilis dominated the daytime offshore fish assemblage whereas bleak Alburnus alburnus prevailed at night. Bream and roach decreased in abundance at night while perch completely disappeared from the offshore habitat. The diel differences in size distributions and direct catches suggested the population-wide horizontal offshore migration of bleak and inshore migration of all perch during dusk. On the other hand, partial inshore migration of bream and roach adults was observed during dusk (52 and 80%, respectively). The different proportions of offshore residents among species and size classes suggested that differences in size, and, therefore, predation vulnerability, contributed to the observed migration patterns.
dcterms:title
To migrate, or not to migrate: partial diel horizontal migration of fish in a temperate freshwater reservoir To migrate, or not to migrate: partial diel horizontal migration of fish in a temperate freshwater reservoir
skos:prefLabel
To migrate, or not to migrate: partial diel horizontal migration of fish in a temperate freshwater reservoir To migrate, or not to migrate: partial diel horizontal migration of fish in a temperate freshwater reservoir
skos:notation
RIV/60077344:_____/13:00392322!RIV14-AV0-60077344
n11:predkladatel
n13:ico%3A60077344
n3:aktivita
n7:I n7:S n7:P
n3:aktivity
I, P(EE2.3.20.0204), P(QH81046), S
n3:cisloPeriodika
1
n3:dodaniDat
n16:2014
n3:domaciTvurceVysledku
n9:8391769 n9:2839156 n9:7045360 n9:5809835 n9:1629565 n9:4382870 n9:6535364 n9:8073473 n9:9148582 n9:9861408 n9:2133865 n9:7596693
n3:druhVysledku
n4:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
111208
n3:idVysledku
RIV/60077344:_____/13:00392322
n3:jazykVysledku
n14:eng
n3:klicovaSlova
diel activity; diurnal migration; individual decision making; horizontal hydroacoustics; purse seining; cyprinids
n3:klicoveSlovo
n8:individual%20decision%20making n8:diurnal%20migration n8:purse%20seining n8:horizontal%20hydroacoustics n8:cyprinids n8:diel%20activity
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[C79003D1160E]
n3:nazevZdroje
Hydrobiologia
n3:obor
n15:EH
n3:pocetDomacichTvurcuVysledku
12
n3:pocetTvurcuVysledku
13
n3:projekt
n10:EE2.3.20.0204 n10:QH81046
n3:rokUplatneniVysledku
n16:2013
n3:svazekPeriodika
707
n3:tvurceVysledku
Mrkvička, T. Kratochvíl, Michal Tušer, Michal Vašek, Mojmír Prchalová, Marie Draštík, Vladislav Frouzová, Jaroslava Peterka, Jiří Čech, Martin Kubečka, Jan Říha, Milan Muška, Milan Jůza, Tomáš
n3:wos
000316332300002
s:issn
0018-8158
s:numberOfPages
12
n18:doi
10.1007/s10750-012-1401-9