Topmouth gudgeon, Pseudorasbora parva (Temminck and Schlegel), is a small cyprinid (maximum recorded: 110 mm fork length; Cakic, Lenhardt, Kolarevic, Mikovic & Hegedis 2004 ) native to Japan, China, Korea and the River Amur basin. Its life history traits, including early maturity (sexually mature at 1 year), batch spawning, nest guarding and broad environmental tolerance limits, favour its ability to succeed in invading new water bodies ( Ricardi & Rasmussen 1998 ) and have undoubtedly assisted the rapid invasion of P. parva in European water bodies ( Gozlan, St‐Hilaire, Feist, Martin & Kent 2005 ). Consequently, P. parva has been classified as an international pest species ( Welcomme 1992 ). Until recently, the hypothesised risks that this Asiatic invader poses to European freshwater biodiversity, such as out‐competing other fishes for food resources and preying on the eggs and larvae of other species ( Stein & Herl 1986 ; Xie, Cui & Li 2001 ), have remained unquantified ( Pinder 2005 ). However, the recent discovery that P. parva is a healthy host to an emergent infectious disease (Rosette‐like Agent, closely related to Sphaerothecum destruens ), which threatens European fish diversity ( Gozlan 2005 ), is the first real
Fisheries Management & Ecology – Wiley
Published: Dec 1, 2005
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