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Winter diet of great cormorant (Phalacrocorax carbo) on the River Vltava: estimate of size and species composition and potential for fish stock losses

SYSNO ASEP	0360692
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Winter diet of great cormorant (Phalacrocorax carbo) on the River Vltava: estimate of size and species composition and potential for fish stock losses
Author(s)	Čech, Martin (BC-A)_{RID, ORCID} Vejřík, Lukáš (BC-A)_{RID, ORCID}
Source Title	Folia zoologica. - : Ústav biologie obratlovců AV ČR, v. v. i. - ISSN 0139-7893 Roč. 60, č. 2 (2011), 129–142
Number of pages	14 s.
Action	Czech Ichthyological Conference /XII./
Event date	19.05.2010-20.05.2010
VEvent location	Vodňany
Country	CZ - Czech Republic
Event type	CST
Language	eng - English
Country	CZ - Czech Republic
Keywords	diagnostic bones ; fish withdrawal ; regurgitated pellets ; European chub ; European perch ; grayling ; roach ; ruffe ; Slapy Reservoir ; trout spp.
Subject RIV	EG - Zoology
R&D Projects	GA206/06/1371 GA ČR - Czech Science Foundation (CSF)
	GP206/09/P266 GA ČR - Czech Science Foundation (CSF)
	1QS600170504 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z60170517 - HBU-Z, BC-A (2005-2011)
UT WOS	000293038500006
Annotation	The winter diet of the great cormorant was studied in three sites on the River Vltava in Vyšší Brod, in Prague and at Slapy Reservoir, Czech Republic. At all three sites, roach (Rutilus rutilus), bream (Abramis brama), bleak (Alburnus alburnus), European chub (Squalius cephalus), European perch (Perca fluviatilis) and ruffe (Gymnocephalus cernuus) made up at least 74.2 % of the cormorants’ diet. A great potential for fish stock losses was identified for the River Vltava at Vyšší Brod and in Prague where the loss of fish due to overwintering great cormorants was estimated to be 22 kg ha–1 and up to 79 kg ha–1 respectively, i.e. belonging among the highest ever published figures for fish withdrawal caused by great cormorants from any inland waters (carp fishponds excluded). Most probably, both great cormorants and anglers are responsible for the decrease in catches of brown trout (Salmo trutta m. fario) and grayling (Thymallus thymallus) from the River Vltava in Vyšší Brod.
Workplace	Biology Centre (since 2006)
Contact	Dana Hypšová, eje@eje.cz, Tel.: 387 775 214
Year of Publishing	2012

Number of the records: 1