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Effects of hydropeaking on the attached eggs of a rheophilic cyprinid species.
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SYSNO ASEP 0553158 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effects of hydropeaking on the attached eggs of a rheophilic cyprinid species. Author(s) Bartoň, Daniel (BC-A) RID
Bretón, Felipe (BC-A)
Blabolil, Petr (BC-A) RID, ORCID
Souza, Allan T. (BC-A) RID, ORCID
Vejřík, Lukáš (BC-A) RID, ORCID
Sajdlová, Zuzana (BC-A) RID, ORCID
Kolařík, Tomáš (BC-A)
Kubečka, Jan (BC-A) RID, ORCID
Šmejkal, Marek (BC-A) RID, ORCIDNumber of authors 9 Article number e2280 Source Title Ecohydrology. - : Wiley - ISSN 1936-0584
Roč. 14, č. 4 (2021)Number of pages 12 s. Language eng - English Country US - United States Keywords fish reproduction ; habitat alternation ; Leuciscus aspius ; river ecology ; wildlife conservation Subject RIV GL - Fishing OECD category Fishery R&D Projects QK1920326 GA MZe - Ministry of Agriculture (MZe) TJ02000012 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Limited access Institutional support BC-A - RVO:60077344 UT WOS 000608998700001 EID SCOPUS 85100223621 DOI 10.1002/eco.2280 Annotation Human-induced changes in the hydrological regimes of lotic waters such as hydropeaking have significant negative impacts on riverine life. However, the impacts of dynamic changes in water flow on adhesive fish eggs are not very well known. We focused on the effects of hydropeaking on the spawning ground of a rheophilic cyprinid fish, the asp (Leuciscus aspius). We tested whether a sudden increase in water velocity caused by hydropeaking may have negative effect on the adhesive eggs by the combination of field observations and laboratory experiments. The main objectives of the study were to (i) investigate abiotic characteristics of an asp spawning ground, (ii) monitor egg densities in relation to hydropeaking events and (iii) test detachment rates of the asp eggs in laboratory conditions in relation to water velocity. The asp spawning ground was associated with shallow water depths (0.2-0.4 m) and flowing water (0.1-0.4 m s(-1)) during base flow. The water velocity that occurred on the spawning ground during the hydropeaking event was measured to be from 0.7-1.2 m s(-1). Asp eggs nearly disappeared from the spawning ground before their hatching time probably due to several hydropeaking events. The laboratory experiments showed the significant dependency of egg detachment rates on the water velocity and substrate type with a critical value of 0.7 m s(-1). Our data suggested that eggs may be negatively impacted by flow alterations. Avoiding hydropeaking or keeping water velocity below critical values is recommended for the management of rheophilous fish spawning grounds. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2022 Electronic address https://doi.org/10.1002/eco.2280
Number of the records: 1