A1 Journal article (refereed)
Vendace (Coregonus albula) Disperse Their Eggs Widely during Spawning (2021)

Karjalainen, J., Tuloisela, M., Nyholm, K., & Marjomäki, T. J. (2021). Vendace (Coregonus albula) Disperse Their Eggs Widely during Spawning. Annales Zoologici Fennici, 58(4-6), 141-153. https://doi.org/10.5735/086.058.0403

JYU authors or editors

Publication details

All authors or editors: Karjalainen, Juha; Tuloisela, Markus; Nyholm, Kristiina; Marjomäki, Timo J.

Journal or series: Annales Zoologici Fennici

ISSN: 0003-455X

eISSN: 1797-2450

Publication year: 2021

Volume: 58

Issue number: 4-6

Pages range: 141-153

Publisher: Finnish Zoological and Botanical Publishing Board

Publication country: Finland

Publication language: English

DOI: https://doi.org/10.5735/086.058.0403

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/78451

Abstract

Depending on their reproductive strategy, different fish species either aggregate or disperse eggs and larvae in their reproductive habitat. Because yolk-sac larvae of vendace (Coregonus albula) disperse widely across the littoral and pelagic zones of boreal lakes, it is unclear where the exact spawning and egg incubation locations are. Vendace egg and larvae densities were studied in Lake Southern Konnevesi to clarify its spawning strategy. In autumn 2019, 1–2 weeks prior to spawning, 500 egg samplers were installed in five depth zones in 20 sampling plots. Fertilized eggs were found in 18 plots. The mean density of eggs was 74 eggs m–2 and the mean fertilization rate 85%. During spawning, vendace dispersed their offspring throughout the lake. The sampling-plot-specific egg density in autumn 2019 did not correlate with larval density in the spring next year. The reproduction strategy of vendace reduces the effects of high spatial and temporal fluctuation in their reproduction and nursery habitats.

Keywords: vendace; reproductive behaviour; spawn

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2021

JUFO rating: 1