Original title: Prostorová distribuce kaprů v polointenzivním rybníce
Translated title: Spatial distribution of carp in semi-intensive pond
Authors: Mrkvová, Markéta ; Zukal, Jan ; Adámek, Zdeněk ; Šútovský, I. ; Jurajda, Pavel
Document type: Papers
Conference/Event: 65 let výuky rybářství na Mendelově univerzitě v Brně, Brno (CZ), 2014-12-02 / 2014-12-03
Year: 2014
Language: cze
Abstract: In semi-intensive pond aquaculture, the dietary requirements of the species cultured (mainly carp Cyprinus carpio) are guaranteed through consumption of natural food organisms together with "supplementary" feed inputs. As a result, we hypothesise that carp will utilise the whole area of the pond in their search for those places where natural food is available. To date, there has been no in-depth study on fish behaviour and feeding habits in such ponds, despite the possibility of food competition where fish are stocked at high densities. Such competition could lead to decreased growth in younger fish cohorts, leading to poorer flesh quality. In this study, we use radio-telemetry to provide new information on carp behaviour in a 130ha pond under semi-intensive aquaculture. Our results indicate that fish distribution in the pond is uneven, with fish using approximately two-thirds of the pond area. This behaviour was partly influenced by size-class. Some fish tended to remain at localities where supplementary food was regularly provided, but some of them used both localities with supplementary and natural food. These results should prove useful for improving fish feeding regimes in ponds using a similar semiintensive system to our model pond.
Host item entry: 65 let výuky rybářství na Mendelově univerzitě v Brně, ISBN 978-80-7509-153-6

Institution: Institute of Vertebrate Biology AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0242387

Permalink: http://www.nusl.cz/ntk/nusl-180446


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