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Natura Croatica Issue number: Natura Croatica, Vol. 20 No.1

Periodičko pojavljivanje štuka (Esox lucius Linneaus, 1758) u Dunavu u sjeverozapadnoj Vojvodini (sjeverna Srbija)

Authors: Thomas Oliver Mérő

Authors and affiliation

  • Thomas Oliver Mérő Nature Protection and Study Society – NATURA, Milana Rakića 20, SRB-25000 Sombor, Serbia

Abstract

This study presents the periodical but irregular appearance of pike (Esox lucius L.) in the Danube River and its inundated ponds. During 14 years, 1076 pike were captured at nine sites. The fish appeared in large numbers in years when the average water level was high in spring (R = 0.738, P < 0.01, n = 14). During the study, there were two periods when there were no pike, either in the river or in the inundated ponds. Furthermore, observation showed that prey fish might also affect the presence or absence of pike in late spring in the study area.

Keywords

water level, Spearman correlation, river, inundated ponds, Pike, Esox lucius, »Gornje Podunavlje«

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