L. Forró szerk.: Miscellanea Zoologica Hungarica 7. 1992 (Budapest, 1992)

Forró, L.; Gulyás, P.: Eurytemora velox (Lilljeborg, 1853) (Copepoda, Calanoida) in the Szigetköz region of the Danube

Table 2. List of species found with E. velox (Legend: 1 = Zátonyi Duna, Doborgaz-sziget, at the Hostel, 07. 06.1991, 2 = As No. 1, 05. 09.1991, 3 = As No. 1, 06. 09. 1991, 4 = Gazfűi Holt-Duna, downstream section at the protecting dike, 07. 06. 1991, 5 = Szavai channel, at Patkányosi pump station, 03. 06. 1991, 6 = Ásványi-Duna, Ásványráró Port, 03. 09.1991, 7 = As No. 7, 06. 09.1991, 8 = Öntési-tó, 18. 06.1991) 1 2 3 4 5 6 7 8 Cladocera Acroperus harpae (Baird, 1835) + Alona quadrangularis (O. F. Müller, 1785) + + Alona rectangula Sars, 1862 + 4- + Alonella nana (Baird, 1843) + + Bosmina longirostris var.pellucida (Stingelin, 1895) -I- + + var. typica (O. F. Müller, 1785) + + + + + Ceriodaphnia pulchella Sars, 1862 + Chydorus ovalis Kurz, 1874 + Chydorus sphaericus (O. F. Müller, 1785) + + + + + + Daphnia cucullata Sars, 1862 -I- + Daphnia hyalina Leydig, 1860 + Daphnia longispina O. F. Müller, 1785 + + + Diaphanosoma brachyurum (Lievin, 1848) + Disparalona rostrata (Koch, 1841) + + Lcptodora kindtii (Focke, 1844) + Moina micrura Kurz, 1874 + + Peracantlia truncata (O. F. Müller, 1785) + Pleuroxus aduncus (Jurine, 1820) + + Pleuroxus uncinatus Baird, 1850 + Scapholeberis mucronata (O. F. Müller, 1785) + Sida crystallina (O. F. Müller, 1776) + Simocephalus serrulatus (Koch, 1841) + Simocephalus vetulus (O. F. Müller, 1776) + + Copepoda Calanoida Eudiaptomus gracilis (Sars, 1863) + + + Eurytemora velox (Lilljeborg, 1853) + + + + + + + + Cyclopoida Acanthocyclops robustus (Sars, 1863) forma limnetica Petkovski, 1975 + + + + + + + Acanthocyclops vemalis (Fischer, 1853) + Cryptocyclops bicolor (Sars, 1863) + Macrocyclops albidus (Jurine, 1820) + Megacyclops viridis (Jurine, 1820) + + Mesocyclops leuckarti (Claus, 1857) + + + + + + + Metacyclops gracilis (Lilljeborg, 1853) + Tliermocyclops crassus (Fischer, 1853) + Tfiermocyclops oithonoides (Sars, 1863) + + + + + + + Number of species 14 10 9 10 8 10 6 17 Summary The presence of E. velox was recorded in several sites in the Szigetköz area in June and following a high flood in July specimens were caught in September, as well. We think that this species certainly inhabits these water bodies and has permanent populations here. It is not clear how it did get here, but since it has resting eggs, its passiv dispersal may be facilitated by bird migration. Some females were