THE POPULATION-DENSITY OF PERCH, PERCA-FLUVIATILIS L IN THE CIKOLA BACKWATER SYSTEM OF THE RIVER DANUBE, HUNGARY

被引：4
|
作者：
GUTI, G
机构：
[1] Danube Research Station, Institute of Ecology and Botany of the Hungarian Academy of Sciences, Göd
来源：
HYDROBIOLOGIA | 1992年 / 242卷 / 03期
关键词：
PERCA-FLUVIATILIS; ESTIMATION OF POPULATION DENSITY; MARK AND RECAPTURE TECHNIQUE; DANUBE;
D O I：
10.1007/BF00019968
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
The numbers of perch Perca fluviatilis in the Cikola backwater system of the river Danube were estimated by mark-recapture techniques using multiple fishings. Fish were caught by fyke nets and electrical fishing. The latter method was unselective for sex and the catch data could be used to correct the sex bias in the fyke net catches. A population estimate in April of 6059 ind ha-1 (95% C.L. 5135-7386) for perch > 5 cm was obtained for a 0.6 ha area of a backwater and 1665 ind ha-1 (95 % C.L. 1204-2692) in May for a 0.4 ha area of a small bay.
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页码：195 / 198
页数：4
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