Distribution, sex ratio and growth of Carassius gibelio (Bloch) in coastal and inland waters of Estonia (north-eastern Baltic Sea)

Summary Gibel carp Carassius gibelio (Bloch) was first introduced into fish ponds and small lakes of Estonia in 1948–49, and first detected in Estonian brackish waters (Gulf of Riga) in 1985. Since the mid‐1990s, the species has spread along the entire Estonian Baltic coastline. Growth rate in the b...

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Published inJournal of applied ichthyology Vol. 21; no. 4; pp. 287 - 291
Main Authors Vetemaa, M., Eschbaum, R., Albert, A., Saat, T.
Format Journal Article
LanguageEnglish
Published Berlin, Germany Blackwell Verlag GmbH 01.08.2005
Subjects
Brackish
Carassius gibelio
Freshwater
ANE, Estonia
ANE, Baltic Sea, Riga Gulf
ANE, Estonia, Riga Gulf
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Summary:Summary Gibel carp Carassius gibelio (Bloch) was first introduced into fish ponds and small lakes of Estonia in 1948–49, and first detected in Estonian brackish waters (Gulf of Riga) in 1985. Since the mid‐1990s, the species has spread along the entire Estonian Baltic coastline. Growth rate in the brackish water population does not differ much from freshwater populations, but the freshwater populations are gynogenetic (or show high dominance of females) in contrast to the Baltic Sea population, which presents a normal sex ratio. The recent explosion of this species in the Baltic Sea could be explained by unusually warm summers during the 1990s and by the low abundance of predatory fish.
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ISSN:0175-8659
1439-0426
DOI:10.1111/j.1439-0426.2005.00680.x