Sara Hočevar

University of Jyväskylä | JYU ·  Department of Biological and Environmental Science

The benthic polyps are important in jellyfish outbreaks, which seem to have become more intense and are causing increasing problems to humans. We studied annual and seasonal changes of the moon jellyfish, Aurelia aurita s.l., polyp population dynamics in situ. Over three years, we took monthly photographs to quantify the abundance and occurrence of...

Stochastic environments shape life‐history traits and can promote selection for risk‐spreading strategies, such as bet‐hedging. Although the strategy has often been hypothesised to exist for various species, empirical tests providing firm evidence have been rare, mainly due to the challenge in tracking fitness across generations. Here, we take a ‘p...

Fisheries exploitation can cause genetic changes in heritable traits of targeted stocks. The direction of selective pressure forced by harvest acts typically in reverse to natural selection and selects for explicit life‐histories, usually for younger and smaller spawners with deprived spawning potential. While the consequences that such selection m...

Can the advantage of risk-managing life-history strategies become a disadvantage under human-induced evolution? Organisms have adapted to the variability and uncertainty of environmental conditions with a vast diversity of life-history strategies. One such evolved strategy is multiple-batch spawning, a spawning strategy common to long-lived fishes...