Počet záznamů: 1
Aspects of spatial dispersion of course fish densities in lowland rivers by acoustic survey
- 1.0150411 - HBU-Z 20013152 RIV DE eng J - Článek v odborném periodiku
Duncan, A. - Schmid, P. E. - Kubečka, Jan
Aspects of spatial dispersion of course fish densities in lowland rivers by acoustic survey.
Verhandlungen Internationale Vereinigung für Theoretische und Angewandte Limnologie. Roč. 27, - (2001), s. 3015-3018. ISSN 0368-0770
Výzkumný záměr: CEZ:AV0Z6017912
Klíčová slova: fish * distribution * river
Kód oboru RIV: BI - Akustika a kmity
The distribution of fish in English rivers as revealed by continuous hydroacoustic survey (horizontal beaming with 420 kHz dual-beam echosounder) was analyzed using spectral (Fourier) analysis in order to extract any existing spatial periodicity of densities. Cyclical re-appearance of patches with high fish density was found in 5000 m intervals. Some shorter range cyclicity was found also in individual reaches of the River Thames and Ouse.
Trvalý link: http://hdl.handle.net/11104/0047945
Počet záznamů: 1