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Statements

Subject Item
n2:RIV%2F68081766%3A_____%2F14%3A00438310%21RIV15-GA0-68081766
rdf:type
skos:Concept n18:Vysledek
dcterms:description
The tubenose goby, Proterorhinus semilunaris, has expanded its range throughout Europe. Comprehensive studies to identify its impact on native riverine ecosystems, however, are relatively scarce. Here, we evaluate dietary preferences of P. semilunaris on a non-native river to reveal any such impacts. Fish were sampled monthly over 2011–2012 from three sites along the River Dyje (Czech Republic; Danube basin) with differing population levels and food availability. Both the amount of food consumed and dietary composition varied seasonally, with site having a strong effect. Food consumed differed between males and females, but not dietary composition; while diet differed between age classes, but not food consumed. In general, Trichoptera, Chironomidae and zooplankton dominated the diet at all sites, with Trichoptera taken more often earlier in the year and zooplankton later. Mussels were always avoided, despite high abundance, while less preferred prey were occasionally taken in high numbers in response to increased availability or energy demand (e.g. spawning). Fish eggs and fry (all P. semilunaris) were only taken in high numbers at one site, being related to high population level and fry drift from a reservoir. Male feeding declined over the breeding season, presumably due to nest guarding, while female feeding declined over winter, possibly resulting in high mortality. Proterorhinus semilunaris is a feeding opportunist, which may facilitate colonisation in habitats with poor prey availability. No predation pressure on native species was observed through consumption of eggs or fry, though small/young indigenous fish may be affected through diet competition. The tubenose goby, Proterorhinus semilunaris, has expanded its range throughout Europe. Comprehensive studies to identify its impact on native riverine ecosystems, however, are relatively scarce. Here, we evaluate dietary preferences of P. semilunaris on a non-native river to reveal any such impacts. Fish were sampled monthly over 2011–2012 from three sites along the River Dyje (Czech Republic; Danube basin) with differing population levels and food availability. Both the amount of food consumed and dietary composition varied seasonally, with site having a strong effect. Food consumed differed between males and females, but not dietary composition; while diet differed between age classes, but not food consumed. In general, Trichoptera, Chironomidae and zooplankton dominated the diet at all sites, with Trichoptera taken more often earlier in the year and zooplankton later. Mussels were always avoided, despite high abundance, while less preferred prey were occasionally taken in high numbers in response to increased availability or energy demand (e.g. spawning). Fish eggs and fry (all P. semilunaris) were only taken in high numbers at one site, being related to high population level and fry drift from a reservoir. Male feeding declined over the breeding season, presumably due to nest guarding, while female feeding declined over winter, possibly resulting in high mortality. Proterorhinus semilunaris is a feeding opportunist, which may facilitate colonisation in habitats with poor prey availability. No predation pressure on native species was observed through consumption of eggs or fry, though small/young indigenous fish may be affected through diet competition.
dcterms:title
Non-native western tubenose gobies Proterorhinus semilunaris show distinct site, sex and age-related differences in diet Non-native western tubenose gobies Proterorhinus semilunaris show distinct site, sex and age-related differences in diet
skos:prefLabel
Non-native western tubenose gobies Proterorhinus semilunaris show distinct site, sex and age-related differences in diet Non-native western tubenose gobies Proterorhinus semilunaris show distinct site, sex and age-related differences in diet
skos:notation
RIV/68081766:_____/14:00438310!RIV15-GA0-68081766
n3:aktivita
n14:I n14:P
n3:aktivity
I, P(GAP505/11/1768)
n3:cisloPeriodika
10
n3:dodaniDat
n10:2015
n3:domaciTvurceVysledku
n5:6271685 n5:9524215 n5:9861408 n5:5540690 n5:7138547
n3:druhVysledku
n13:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
32820
n3:idVysledku
RIV/68081766:_____/14:00438310
n3:jazykVysledku
n11:eng
n3:klicovaSlova
invasive species; Gobiidae; Proterorhinus semilunaris; diet; site-effect; sex-differences
n3:klicoveSlovo
n6:Proterorhinus%20semilunaris n6:site-effect n6:sex-differences n6:invasive%20species n6:Gobiidae n6:diet
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[9FC968FEEC71]
n3:nazevZdroje
Knowledge and Management of Aquatic Ecosystems
n3:obor
n4:EG
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n9:GAP505%2F11%2F1768
n3:rokUplatneniVysledku
n10:2014
n3:svazekPeriodika
414
n3:tvurceVysledku
Janáč, Michal Všetičková, Lucie Vašek, Mojmír Roche, Kevin Francis Jurajda, Pavel
n3:wos
000345773200010
s:issn
1961-9502
s:numberOfPages
19
n15:doi
10.1051/kmae/2014022