10.5061/DRYAD.QJ163
Klefoth, Thomas
Leibniz Institute of Freshwater Ecology and Inland Fisheries
Skov, Christian
Technical University of Denmark
Kuparinen, Anna
University of Jyväskylä
Arlinghaus, Robert
Leibniz Institute of Freshwater Ecology and Inland Fisheries
Humboldt University of Berlin
Data from: Towards a mechanistic understanding of vulnerability to
hook-and-line fishing: boldness as the basic target of angling-induced
selection
Dryad
dataset
2017
evolutionary change
catchability
angling
2017-06-08T17:11:34Z
2017-06-08T17:11:34Z
en
https://doi.org/10.1111/eva.12504
23554 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
In passively operated fishing gear, boldness-related behaviors should
fundamentally affect the vulnerability of individual fish and thus be
under fisheries selection. To test this hypothesis, we used juvenile
common-garden reared carp (Cyprinus carpio) within a narrow size-range to
investigate the mechanistic basis of behavioral selection caused by
angling. We focused on one key personality trait (i.e., boldness),
measured in groups within ponds, two morphological traits (body-shape and
head-shape), and one life-history trait (juvenile growth capacity) and
studied mean standardized selection gradients caused by angling. Carp
behavior was highly repeatable within ponds. In the short-term, over seven
days of fishing, total length, not boldness, was the main predictor of
angling vulnerability. However, after 20 days of fishing, boldness turned
out to be the main trait under selection, followed by juvenile growth
rate, while morphological traits were only weakly related to angling
vulnerability. In addition, we found juvenile growth rate to be moderately
correlated with boldness. Hence, direct selection on boldness will also
induce indirect selection on juvenile growth and vice versa, but given
that the two traits are not perfectly correlated, independent evolution of
both traits is also possible. Our study is among the first to
mechanistically reveal that energy-acquisition related behaviors, and not
growth rate per se, are key factors determining the probability of
capture, and hence behavioral traits appear to be the prime targets of
angling selection. We predict an evolutionary response towards increased
shyness in intensively angling-exploited fish stocks, possibly causing the
emergence of a timidity-syndrome.
KlefothEtAl_data