Počet záznamů: 1
Are diel vertical migrations of European perch (Perca fluviatilis L.) early juveniles under direct control of light intensity? Evidence from a large field experiment
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SYSNO ASEP 0494916 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Are diel vertical migrations of European perch (Perca fluviatilis L.) early juveniles under direct control of light intensity? Evidence from a large field experiment Tvůrce(i) Sajdlová, Zuzana (BC-A) RID, ORCID
Frouzová, Jaroslava (BC-A) RID, ORCID
Draštík, Vladislav (BC-A) RID, ORCID
Jůza, Tomáš (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCID
Prchalová, Marie (BC-A) RID, ORCID
Říha, Milan (BC-A) RID, ORCID
Vašek, Mojmír (BC-A) RID, ORCID
Kubečka, Jan (BC-A) RID, ORCID
Čech, Martin (BC-A) RID, ORCIDZdroj.dok. Freshwater Biology. - : Wiley - ISSN 0046-5070
Roč. 63, č. 5 (2018), s. 473-482Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova canyon-shaped reservoir ; mouth opening size ; burbot lota-lota ; lake constance ; planktivorous fish Vědní obor RIV EH - Ekologie - společenstva Obor OECD Ecology Vědní obor RIV – spolupráce Ekologie - společenstva CEP GA206/06/1371 GA ČR - Grantová agentura ČR 7F14316 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy EF16_025/0007417 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora BC-A - RVO:60077344 UT WOS 000428995400006 EID SCOPUS 85042048271 DOI 10.1111/fwb.13085 Anotace Diel vertical migrations (DVMs) belong among the most pronounced movements in the aquatic environment. A general pattern of DVMs has been well described, particularly in European perch (Perca fluviatilis), but whether the migrations are directly controlled by light and what is the ultimate cause of the diel vertical shifts, remains poorly understood. Undertaking a large-scale field experiment in a thermally stratified, canyon-shaped reservoir, we demonstrated for the first time that DVMs of a bathypelagic early juveniles community, dominated by European perch larvae and juveniles prior the metamorphosis, were under direct control of the light intensity, that is, they did not operate as a genetically fixed behaviour. Prior to the experiment, the depth distribution of the bathypelagic perch early juveniles was strongly correlated with the light intensity on the water surface (p <.001). The community underwent regular DVMs between the epilimnion (depth <2.0 m) and hypolimnion (depth >3.0 m) reaching a maximum amplitude of 13 m. Hydroacoustic recordings by the echosounder SIMRAD EK 60 (120 and 400 kHz) showed that during the experiment, when the surface was covered with a large black non-transparent foil (2500 m2, simulated conditions of complete and constant darkness), the regular vertical movement of the bathypelagic perch early juveniles was interrupted and the community occupied the epilimnion constantly for 24 hr. Immediately after the foil was removed at midday, the bathypelagic perch early juveniles were exposed to a steep increase in light intensity (from <1 LUX to >100 × 103 LUX) and they escaped into the hypolimnion where they were safe from visual predation which took place in the bright surface layers (epilimnion particularly). Our findings imply that occupying a deep, dark refuge in the daytime is essential for the survival of perch in their early life stage. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2019
Počet záznamů: 1