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P. parva populations occurring in European fresh waters display a wide morphological variability, significantly differing from one another (Kotusz and Witkowski, 1998;Z‡horsk‡ et al., unpublished). However, there appears to be little variability amongst introduced European populations, with the greatest morphological variation appearing to be between native and non-native populations (Louette et al., 2002). The species is generally saline intolerant (Scott et al., 2007) and is known to disappear from fresh waters that suffer rises in salinity Sexual dimorphism is manifested in larger body size of males as well as in four plastic characters (Coombs, 2004). Large adults have sexually dimorphic coloration (Kottelat, 2001). The body colour is greenish-grey and brown in the back. Lateral line runs along the centre of body and contains 35-38 scales. P. parva has a total of 3-3 dorsal spines and 7-7 dorsal rays whereas anal spines and anal rays are 3-3 and 6-6, respectively. Mouth is transverse and positioned superiorly. It does not have barbels. P. parva can grow to a total length of 11 cm (Berg, 1964).

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  • Introduced species
Has Cabi datasheet ID
67983
Oss tagged
x

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