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Statements

Subject Item
n2:RIV%2F60077344%3A_____%2F12%3A00385527%21RIV13-GA0-60077344
rdf:type
n12:Vysledek skos:Concept
dcterms:description
The roles of wind protected bays, presence of littoral vegetation and light attenuation in the water column on spawning site selection and depth of egg strands deposition by perch Perca fluviatilis was studied in Římov Reservoir, Czech Republic, in the years 2007 and 2011 using boat observation and SCUBA divers. The data were compared with results from Chabařovice Lake, Czech Republic, where similar monitoring took place in 2007-2010 and 2012. In shallow water of Římov Reservoir, the density of egg strands was significantly higher in grass bays compared to rocky bays and in the main reservoir. Most egg strands were deposited in water less than 0.5 m deep on reed canarygrass Phalaris arudinacea. In year when the littoral vegetation was absent perch were forced to spawn significantly deeper on various types of woody structures. In Římov Reservoir, which is less vulnerable to wind, 91.1% of egg strands were spawned in water less than 3 m deep. In contrast, in the wind exposed Chabařovice Lake, even in the presence of littoral vegetation, 90.5% of egg strands were found at depths greater than 3 m. In Chabařovice Lake, the light penetrated to three times greater depth compared to Římov Reservoir and, similarly, the depth limit to which 95% of egg strands were spawned was three times greater in this lake compared to Římov Reservoir. This study is the first contribution showing the role of water transparency in controlling the depth distribution of perch egg strands in lakes and reservoirs. The roles of wind protected bays, presence of littoral vegetation and light attenuation in the water column on spawning site selection and depth of egg strands deposition by perch Perca fluviatilis was studied in Římov Reservoir, Czech Republic, in the years 2007 and 2011 using boat observation and SCUBA divers. The data were compared with results from Chabařovice Lake, Czech Republic, where similar monitoring took place in 2007-2010 and 2012. In shallow water of Římov Reservoir, the density of egg strands was significantly higher in grass bays compared to rocky bays and in the main reservoir. Most egg strands were deposited in water less than 0.5 m deep on reed canarygrass Phalaris arudinacea. In year when the littoral vegetation was absent perch were forced to spawn significantly deeper on various types of woody structures. In Římov Reservoir, which is less vulnerable to wind, 91.1% of egg strands were spawned in water less than 3 m deep. In contrast, in the wind exposed Chabařovice Lake, even in the presence of littoral vegetation, 90.5% of egg strands were found at depths greater than 3 m. In Chabařovice Lake, the light penetrated to three times greater depth compared to Římov Reservoir and, similarly, the depth limit to which 95% of egg strands were spawned was three times greater in this lake compared to Římov Reservoir. This study is the first contribution showing the role of water transparency in controlling the depth distribution of perch egg strands in lakes and reservoirs.
dcterms:title
Extremely shallow spawning of perch (Perca fluviatilis L.): the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water Extremely shallow spawning of perch (Perca fluviatilis L.): the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water
skos:prefLabel
Extremely shallow spawning of perch (Perca fluviatilis L.): the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water Extremely shallow spawning of perch (Perca fluviatilis L.): the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water
skos:notation
RIV/60077344:_____/12:00385527!RIV13-GA0-60077344
n12:predkladatel
n16:ico%3A60077344
n3:aktivita
n14:I n14:P
n3:aktivity
I, P(GA206/06/1371), P(GP206/09/P266), P(QH81046)
n3:cisloPeriodika
December
n3:dodaniDat
n9:2013
n3:domaciTvurceVysledku
n10:7045360 n10:1629565 n10:9148582 n10:7596693 n10:6535364 n10:9497129 n10:2133865 n10:1972200 n10:8073473 n10:4382870
n3:druhVysledku
n19:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
135970
n3:idVysledku
RIV/60077344:_____/12:00385527
n3:jazykVysledku
n18:eng
n3:klicovaSlova
Římov Reservoir; Chabařovice Lake; SCUBA diving; Reed Canarygrass Phalaris arudinacea; Goat Willow Salix caprea; egg strands
n3:klicoveSlovo
n4:SCUBA%20diving n4:Chaba%C5%99ovice%20Lake n4:%C5%98%C3%ADmov%20Reservoir n4:egg%20strands n4:Goat%20Willow%20Salix%20caprea n4:Reed%20Canarygrass%20Phalaris%20arudinacea
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[2C791E60D0DF]
n3:nazevZdroje
Knowledge and Management of Aquatic Ecosystems
n3:obor
n17:EG
n3:pocetDomacichTvurcuVysledku
10
n3:pocetTvurcuVysledku
10
n3:projekt
n8:QH81046 n8:GA206%2F06%2F1371 n8:GP206%2F09%2FP266
n3:rokUplatneniVysledku
n9:2012
n3:svazekPeriodika
406
n3:tvurceVysledku
Čech, Martin Peterka, Jiří Vejřík, Lukáš Jůza, Tomáš Znachor, Petr Říha, Milan Muška, Milan Kubečka, Jan Kratochvíl, Michal Draštík, Vladislav
n3:wos
000312092600009
s:issn
1961-9502
s:numberOfPages
12
n11:doi
10.1051/kmae/2012026