Abstract
Background. In October 2007 an invasive alien species, the Chinese sleeper, Perccottus glenii Dybowski, 1877 (known also as the Amur sleeper), was recorded in carp ponds in KrakĂłw-Mydlniki (southern part of Vistula River drainage). As far as we know, this is the uppermost site in the Polish part of the Vistula River drainage. Thirty-six individuals of P. glenii were collected during fishery works. Basic morphometric measurements were obtained, following the commonly accepted procedures, in order to describe the general body shape of P. glenii.
Highlights
In October 2007 an invasive alien species, the Chinese sleeper, Perccottus glenii Dybowski, 1877, was recorded in carp ponds in Kraków-Mydlniki
P. glenii is indigenous to the Far East of Russia, north-east China, and northern North Korea
In the Vistula River drainage P. glenii was recorded for the first time in 1988 by Movchan in the Vishnya River in the territory of Ukraine (Bogutskaya and Naseka 2002)
Summary
In October 2007 an invasive alien species, the Chinese sleeper, Perccottus glenii Dybowski, 1877 (known as the Amur sleeper), was recorded in carp ponds in Kraków-Mydlniki (southern part of Vistula River drainage). The Chinese sleeper (known as the Amur sleeper, about 15 known and confirmed localities within the Vistula rotan; or trawianka in Polish), Perccottus glenii Dybowski, River drainage (Poland), where the species occurs (Fig. 1). P. glenii is indigenous to the Far East of Russia, north-east China, and northern North Korea
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