文章基本信息

标题：Periodical appearance of pike (Esox lucius Linnaeus, 1758) in the Danube River in north-western Vojvodina (N Serbia)
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作者：Mérõ, Thomas Oliver
期刊名称：Natura Croatica
印刷版ISSN：1330-0520
出版年度：2011
卷号：20
期号：1
页码：201-207
出版社：Croatian Natural History Museum
摘要：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.
关键词：water level; Spearman correlation; river; inundated ponds; Pike; Esox lucius; »Gornje Podunavlje«