EFFECTS OF DAMS, REGULATION AND POLLUTION ON FISH STOCKS IN THE VLTAVA RIVER IN PRAGUE

被引：13

作者：

KUBECKA, J

VOSTRADOVSKY, J

机构：

[1] Hydrobiological Institute, Czech Academy of Sciences, Ceské Budejovice, 370 05

[2] Water Research Institute, Prague, 160 62

[3] Department of Biology, Royal Holloway College, University of London, Egham, Surrey

来源：

REGULATED RIVERS-RESEARCH & MANAGEMENT | 1995年 / 10卷 / 2-4期

关键词：

FISH DENSITY; TAILWATER TEMPERATURE; SONAR;

D O I：

10.1002/rrr.3450100205

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Fish abundance and size composition in a 28 km stretch of the Vltava River in the Czech capital of Prague were studied using horizontal dual-beam scientific sonar. Very low fish densities (0.6-0.7 fish/100 m(3)) were found above Prague where the river is influenced by a cascade of reservoirs. These have a retention time of more than 100 days and release hypolimnetic water. A significant increase in fish density was found in the Berounka River confluence (a tributary with a normal, seasonal temperature pattern) just above the city (about 10 fish/100 m(3)). The fish stock is fairly low in the city itself because of channelization of the river bed (1.3-3.5 fish/100 m(3)), but much greater densities (14.9-16.9 fish/100 m(3)) were found below the city where the river receives a high organic load of partially treated sewage and has a semi-natural shoreline. The largest average fish size and biomass were also reported from this section.

引用

页码：93 / 98

页数：6

共 14 条

[1]

Albertova O., LisKova E., Bottom fauna of the Vltava River in the Prague urban area, Pap. Res. Inst. Fish. Hydrobiol. Vodnany, 14, pp. 3-35, (1985)

[2]

Barwick D.H., Oliver J.L., Fish distribution and abundance below a Southeastern Hydropower Dam, Proc. Annu. Conf. Southeast. Assoc. Fish and Wildl. Agencies, 36, pp. 135-145, (1982)

[3]

Brandl Z., Desortova B., HrbacEk J., KomaRkova J., VyhnaLek V., Seda J., StrasKraba M., Seasonal changes of zooplankton and phytoplankton and their mutual relations in some Czechoslovak reservoirs, Arch. Hydrobiol. Beih. Ergebn. Limnol., 33, pp. 597-604, (1989)

[4]

KubecKa J., Simple model on the relationship between fish acoustical target strength and aspect for high‐frequency sonar in shallow waters, Journal of Applied Ichthyology, 10, pp. 75-81, (1994)

[5]

KubecKa J., Use of horizontal dual‐beam sonar for fish surveys in shallow waters, Fish Stock Assessment

[6]

KubecKa J., Duncan A., Butterworth A.J., Echo counting or echointegration for fish biomass assessment in shallow waters, European Conference of Underwater Acoustics, pp. 129-132, (1992)

[7]

KubecKa J., Duncan A., Duncan W., Sinclair D., Butterworth A.J., Brown trout populations of three Scottish lochs estimated by horizontal sonar and multi‐mesh gillnets, Fish. Res., 20, pp. 29-48, (1994)

[8]

Liu J.K., Yu Z.T., Water quality changes and effects on fish populations in the Hanjiang River, China, following hydroelectric dam construction, Regul. Riv., 7, pp. 359-368, (1992)

[9]

Penczak T., Fish production in the Warta River: postimpoundment study, Hydrobiologia, 242, pp. 87-93, (1992)

[10]

Petts G.E., Impounded Rivers, Perspective for Ecological Management, (1984)

← 1 2 →