Abstract
The aim of this paper is to present the distribution of the non-native species Hypania invalida (Polychaeta) within Serbian waters. In 1971, this species was found for the first time in the Danube and the Sava Rivers. According to our results, H. invalida is now widespread within potamon-type rivers that are under the influence of hydromorphological alterations and exposed to intensive ship traffic. The distribution of this polychaete species, as well as some other alien aquatic invertebrate taxa Branchiura sowerbyi, Chinese pond mussel Anodonta woodiana, Spiny cheek crayfish Orconectes limosus and Asian clam Corbicula fluminea, further indicates that heavily modified waterways are suitable recipient areas for species introduction and
Highlights
Hypania invalida (Grube, 1860) (Annelida: Polychaeta) is a Ponto-Caspian species
In this paper we present records of Hypania invalida (Grube, 1860) in Serbian waters, as a contribution to general knowledge on the distribution of this species in Europe
In autumn 1971, a single specimen of Hypania invalida was found in the Danube River, upstream from settlement Donji Milanovac (Site 26; Appendix 1)
Summary
Hypania invalida (Grube, 1860) (Annelida: Polychaeta) is a Ponto-Caspian species It is considered as eurytopic, active filter feeding and deposit feeding species (Manoleli 1975), with a preference for fine substrate, ranging from silt to gravel (Manoleli 1975; Popescu-Marinescu 1980; Rusev and Marinov 1964; Šporka 1998). It is typical species for eupotamon environments (Sporka 1998). H. invalida can be found in high population densities, especially within stretches that are under the influence of hydromorphological alteration. A population density exceeding 104 ind m-2 was documented for Austrian (Weber 1964) and Romanian sectors (Popescu-Marinescu 1992) of the Danube River
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