Prostorová distribuce kaprů v polointenzivním rybníce

0438970 - ÚBO 2015 CZ cze C - Conference Paper (international conference)
Mrkvová, Markéta - Zukal, Jan - Adámek, Zdeněk - Šútovský, I. - Jurajda, Pavel
Prostorová distribuce kaprů v polointenzivním rybníce.
[Spatial distribution of carp in semi-intensive pond.]
65 let výuky rybářství na Mendelově univerzitě v Brně. Brno: Mendelova univerzita, 2014 - (Kopp, R.), s. 81-85. ISBN 978-80-7509-153-6.
[65 let výuky rybářství na Mendelově univerzitě v Brně. Brno (CZ), 02.12.2014-03.12.2014]
Institutional support: RVO:68081766
Subject RIV: GL - Fishing

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.
Permanent Link: http://hdl.handle.net/11104/0242387