Academy of Finland
Funding decision
 
Name Härkönen, Laura
Organisation OY
Project title
Ecological and evolutionary consequences of contemporary fishing
Decision No. 287700
Decision date 11.05.2015
Funding period 01.09.2015 - 31.08.2018
Funding 278 459
WebFOCUS Report
Project description
The project consisted of several experimental studies exploring consequences of harvest selection. Using the Eurasian perch, I studied individual and social behavioral activities and their contribution to vulnerability to fishing, and transgenerational effects of fishing on behavior, growth and survival under natural selection. The studies produced novel findings on circadian behavioral variation in social fish, and the role of individual activity rhythms on angling vulnerability. I also found that in heavily harvested experimental populations the proportion of cannibalistic individuals was markedly reduced compared to unharvested populations. Cannibalism was also the most significant natural mortality agent having great impacts on population density and hence on juvenile growth. To conclude, angling-induced selection mediated by individual behavior may alter social interactions, which may lead to phenotypic changes seen at population level only after one generation of selection.