Seasonal and daily protandry in a cyprinid fish

0479883 - BC 2018 RIV GB eng J - Journal Article
Šmejkal, Marek - Ricard, Daniel - Vejřík, Lukáš - Mrkvička, Tomáš - Vebrová, Lucie - Baran, Roman - Blabolil, Petr - Sajdlová, Zuzana - Vejříková, Ivana - Prchalová, Marie - Kubečka, Jan
Seasonal and daily protandry in a cyprinid fish.
Scientific Reports. Roč. 7, JUL (2017), č. článku 4737. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA MŠMT(CZ) 7F14316; GA ČR GPP505/12/P647; GA MŠMT(CZ) EE2.3.30.0032
Grant - others:AV ČR(CZ) StrategieAV21/9
Program: StrategieAV
Institutional support: RVO:60077344
Keywords : sexual selection * asp. * reproductive success * breeding areas * life-history
OECD category: Ecology
Impact factor: 4.122, year: 2017

In polygynandrous mating systems, in which females limit reproductive success, males can increase their success by investing in courtship. Earlier arrival at the spawning ground compared to when females arrive may increase their opportunities in competitive mating systems. In this study, we used passive telemetry to test whether a male minnow known as the asp, Leuciscus aspius, times its arrival at spawning grounds relative to the arrival of females. Males arrived in a model stream approximately five days earlier than females on average and left four to five days later than females over two years. Both sexes performed a daily migration between a staging ground (standing water, low energy costs) and the fluvial spawning ground (high energy costs). Fish abundance peaked twice a day, with a major peak at sunset and a minor peak at sunrise and with the evening peak abundance for males occurring 1 hour 40 minutes earlier than that of females. The number of females on the spawning ground never exceeded the number of males. While the degree of protandry is hypothesized to be influenced by the operational sex ratio (ranging from 0.5 to 1 in our study), our data did not support this theory.
Permanent Link: http://hdl.handle.net/11104/0275803