Data from: Fast-slow life history is correlated with individual differences in movements and prey selection in an aquatic predator in the wild

Fast and slow life histories are proposed to covary with consistent
individual differences in behaviour, but little is known whether it holds
in the wild, where individuals experience natural fluctuations of the
environment. We investigated whether individual differences in behaviour,
such as movement traits and prey selection, are linked to variation in
life-history traits in Eurasian perch (Perca fluviatilis) in the wild.
Using high-resolution acoustic telemetry, we collected the positional data
of fish in a whole natural lake and estimated individual movement traits
by fitting a two-state correlated random walk model. Prey selection was
inferred from stable isotope analysis using scale samples. Life-history
traits were estimated by fitting a biphasic growth model to an individual
growth trajectory back-calculated from scale samples. Life-history traits
were correlated with behavioural traits such as movements and prey
selection. Individuals with higher reproductive effort were found to
switch more frequently between active and inactive modes and show greater
reliance on prey from pelagic pathways (indicated by lower δ13C). Further,
individuals with faster juvenile growth were found to stay active for a
longer time during the adult stage. Our results demonstrate the link
between individual behavioural differences and fast–slow life-history
traits under ecologically relevant conditions.