Diet composition and size‐related changes in the feeding of pikeperch,Stizostedion lucioperca(Percidae) and pike,Esox lucius(Esocidae) in the Lake Peipsi (Estonia)
作者:
Andu Kangur,
Peeter Kangur,
期刊:
Italian Journal of Zoology
(Taylor Available online 1998)
卷期:
Volume 65,
issue sup1
页码: 255-259
ISSN:1125-0003
年代: 1998
DOI:10.1080/11250009809386828
出版商: Taylor & Francis Group
关键词: Pikeperch;Pike;Diet composition;Size;related changes
数据来源: Taylor
摘要:
The aim of this study was to estimate the composition of the diet and size‐related changes in the prey selection of pikeperch and pike in L. Peipsi. A total of 591 pikeperches with a standard length (Sl) of 9–73 cm and 254 pikes (Sl = 25–105 cm) were sampled with a bottom seine and an experimental trawl in 1994–1996 and their stomach content analysed. The frequency of occurrence and number of prey fish per individual were used for the description of the diet. The recent diet of pikeperch and pike in the Lake Peipsi were not exactly the same, although smelt, ruffe and perch were the main prey fishes of both. Smelt was the commonest in the diet of pikeperch in contrast to ruffe that was mainly taken by pike.
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