Počet záznamů: 1
Carp feeding activity and habitat utilisation in relation to supplementary feeding in a semi-intensive aquaculture pond
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SYSNO ASEP 0462470 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Carp feeding activity and habitat utilisation in relation to supplementary feeding in a semi-intensive aquaculture pond Tvůrce(i) Jurajda, Pavel (UBO-W) RID, SAI, ORCID
Adámek, Zdeněk (UBO-W) RID, SAI, ORCID
Roche, Kevin Francis (UBO-W) RID, SAI
Mrkvová, Markéta (UBO-W) RID
Štarhová, Dagmar (UBO-W)
Prášek, Václav (UBO-W) SAI
Zukal, Jan (UBO-W) RID, ORCID, SAICelkový počet autorů 7 Zdroj.dok. Aquaculture International. - : Springer - ISSN 0967-6120
Roč. 24, č. 6 (2016), s. 1627-1640Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Cyprinus carpio ; telemetry ; fish diet ; fat content ; pond aquaculture ; water quality Vědní obor RIV EG - Zoologie CEP GBP505/12/G112 GA ČR - Grantová agentura ČR Institucionální podpora UBO-W - RVO:68081766 UT WOS 000389609200008 EID SCOPUS 84986276598 DOI 10.1007/s10499-016-0061-6 Anotace A combination of radio telemetry and electrofishing was used to assess seasonal
feeding activity and habitat utilisation of common carp (Cyprinus carpio) in a large (130 ha) semi-intensive aquaculture pond receiving supplementary feed. While telemetry indicated no difference in fish habitat utilisation by size, age or sample year, all fish showed a strong preference for the supplementary feed area (SFA) during the feeding period, electrofishing indicating a 159 higher fish concentration. Despite this, not all of the feed provided was eaten immediately. Carp activity was more evenly spread over the pond in summer/autumn and more concentrated at the SFA in spring. There was a significant shift to deeper waters in winter. Diet analysis indicated a high preponderance of cereal in SFA fish, with natural food (mainly zooplankton) dominant at natural feeding areas. The proportion of "emergency" food (e.g. detritus) was similar in both areas, as was the index of gut fullness. Our results confirm that concentrated and repeated supplementary feeding in one area results in aggregation of carp, potentially leading to uneven population growth and flesh quality and reduced water quality from turbidity and increased nutrient input. As an alternative, we suggest spreading less supplemental feed over a greater area at wider time intervals. This would ensure (a) full utilisation of feed, reducing costs and increasing water quality, and (b) more homogenous fish distribution, ensuring more efficient use of natural food, reduced turbidity, more homogenous size/weight distribution and improved product quality.Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2017
Počet záznamů: 1