Abstract
In September 2009 a non-native shrimp species was found at two sampling sites in Varna Lake, a brackish coastal water body connected to the Bulgarian Black Sea. Diagnosis based on morphological features confirmed that the examined individuals belonged to the species Palaemon macrodactylus Rathbun, 1902. All specimens found were ovigerous, 2+ year females suggesting the presence of a viable population in the system. Possible ways of introduction and community effects for Varna Lake are discussed.
Highlights
Palaemon macrodactylus (Rathbun, 1902) originates from the temperate north-western Pacific: Japan, Korea and China (Holthuis 1980)
P. macrodactylus have recently been recorded in estuarine water bodies along the Romanian coast in the Black Sea (Micu and Niţă 2009)
In the present paper we report the first sightings of P. macrodactylus in Bulgarian waters
Summary
Palaemon macrodactylus (Rathbun, 1902) originates from the temperate north-western Pacific: Japan, Korea and China (Holthuis 1980). In 2006, P. macrodactylus was reported in the Gironde Estuary, France (Beguer et al 2007). Ashelby et al (2004) found P. macrodactylus in the Orwell and Stour estuaries in south-eastern England, North Sea. More recently, D’Udekem d’Acoz et al (2005) reported the oriental shrimps being caught at different sites along the southern bight of the Northern Sea. First observations in German waters, and some important conclusions about the oriental shrimp presence in other estuarine habitats of the North Sea, were published by González-Ortegón et al (2007). P. macrodactylus have recently been recorded in estuarine water bodies along the Romanian coast in the Black Sea (Micu and Niţă 2009)
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