Contrasting structural complexity differentiate hunting strategy in an ambush apex predator.
Milan Říha,Karl Øystein Gjelland,Vilém Děd,Antti P. Eloranta,Ruben Rabaneda-Bueno,Henrik Baktoft,Lukáš Vejřík,Ivana Vejříková,Vladislav Draštík,Marek Šmejkal,Michaela Holubová,Tomáš Jůza,Carolyn Rosten,Zuzana Sajdlová,Finn Økland,Jiří Peterka +15 more
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It is demonstrated how differences in structural complexity mediated prominent changes in the foraging behaviour of an apex predator, which in turn may have effects on the prey community.Abstract:
Structural complexity is known to influence prey behaviour, mortality and population structure, but the effects on predators have received less attention We tested whether contrasting structural complexity in two newly colonised lakes (low structural complexity lake-LSC; high structural complexity-HSC) was associated with contrasting behaviour in an aquatic apex predator, Northern pike (Esox lucius; hereafter pike) present in the lakes Behaviour of pike was studied with whole-lake acoustic telemetry tracking, supplemented by stable isotope analysis of pike prey utilization and survey fishing data on the prey fish community Pike displayed increased activity, space use, individual growth as well as behavioural differentiation and spent more time in open waters in the LSC lake Despite observed differences between lakes, stable isotopes analyses indicated a high dependency on littoral food sources in both lakes We concluded that pike in the HSC lake displayed a behaviour consistent with a prevalent ambush predation behaviour, whereas the higher activity and larger space use in the LSC lake indicated a transition to more active search behaviour It could lead to increased prey encounter and cause better growth in the LSC lake Our study demonstrated how differences in structural complexity mediated prominent changes in the foraging behaviour of an apex predator, which in turn may have effects on the prey communityread more
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Body size scaling of space use in coastal pike (Esox lucius) in brackish lagoons of the southern Baltic Sea
Félicie Dhellemmes,Eneko Aspillaga,Thomas Rittweg,Josep Alós,Patricia Möller,Robert Arlinghaus +5 more
TL;DR: In this article , the spatial behaviour of coastal pike living in brackish lagoons was studied and it was found that the space used by coastal pikes (50 % and 95 % utilization distribution, UD) scaled positively with body size, with larger fish using significantly more space after controlling for co-variates, but this effect was mainly observed at between lagoon level.
Journal ArticleDOI
Seasonal habitat use of three predatory fishes in a freshwater ecosystem
Milan Říha,Ruben Rabaneda-Bueno,Ivan Jarić,Allan T. Souza,Lukáš Vejřík,Vladislav Draštík,Petr Blabolil,Michaela Holubová,Tomáš Jůza,Karl Øystein Gjelland,Pavel Rychtecký,Zuzana Sajdlova,Luboš Kočvara,Michal Tušer,Marie Prchalová,Jaromír Seďa,Jiří Peterka +16 more
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Behavioural thermoregulation in cold‐water freshwater fish: Innate resilience to climate warming?
TL;DR: In this article , a quantitative global synthesis of behavioral thermoregulation in freshwater fish is presented, showing that fish move from warm to cooler habitats, with the extent of the temperature difference between these habitats decreasing with increasing latitude, with juvenile and non-migratory fishes tolerating greater temperature differences than adult and anadromous individuals.
Journal ArticleDOI
A synthesis of a coastal northern pike (Esox lucius) fishery and its social-ecological environment in the southern Baltic Sea: Implications for the management of mixed commercial-recreational fisheries
Robert Arlinghaus,Timo D. Rittweg,Félicie Dhellemmes,Dieter Koemle,Robert W. van Gemert,Hendrik Schubert,Dominique Niessner,Sören Möller,Jan Droll,René Friedland,Wolf-Christian Lewin,Malte Dorow,Linda Westphal,Elias Ehrlich,Harry Vincent Strehlow,Marc Simon Weltersbach,Marlon Alexander Braun,Fritz Feldhege,Helmut M. Winkler +18 more
TL;DR: In this article , the authors synthesize a large body of literature involving peer-reviewed work, grey literature and novel data analyses about the small-scale northern pike fishery in lagoon ecosystems in the southern Baltic Sea.
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A review: James H. Meisel, The Fall of the Republic: Military Revolt in France Edward R. Tannenbaum, The Action Française: Diehard Reactionaries in Twentieth-Century France
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