Contrasting structural complexity differentiate hunting strategy in an ambush apex predator

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 co...

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Autores principales:	Milan Říha, Karl Ø. Gjelland, Vilém Děd, Antti P. Eloranta, Ruben Rabaneda-Bueno, Henrik Baktoft, Lukáš Vejřík, Ivana Vejříková, Vladislav Draštík, Marek Šmejkal, Michaela Holubová, Tomas Jůza, Carolyn Rosten, Zuzana Sajdlová, Finn Økland, Jiří Peterka
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b62f7524caa346dab7e15ff4a7e4b180
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spelling	oai:doaj.org-article:b62f7524caa346dab7e15ff4a7e4b1802021-12-02T15:28:57ZContrasting structural complexity differentiate hunting strategy in an ambush apex predator10.1038/s41598-021-96908-12045-2322https://doaj.org/article/b62f7524caa346dab7e15ff4a7e4b1802021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96908-1https://doaj.org/toc/2045-2322Abstract 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 community.Milan ŘíhaKarl Ø. GjellandVilém DědAntti P. ElorantaRuben Rabaneda-BuenoHenrik BaktoftLukáš VejříkIvana VejříkováVladislav DraštíkMarek ŠmejkalMichaela HolubováTomas JůzaCarolyn RostenZuzana SajdlováFinn ØklandJiří PeterkaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-20 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Milan Říha Karl Ø. Gjelland Vilém Děd Antti P. Eloranta Ruben Rabaneda-Bueno Henrik Baktoft Lukáš Vejřík Ivana Vejříková Vladislav Draštík Marek Šmejkal Michaela Holubová Tomas Jůza Carolyn Rosten Zuzana Sajdlová Finn Økland Jiří Peterka Contrasting structural complexity differentiate hunting strategy in an ambush apex predator
description	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 community.
format	article
author	Milan Říha Karl Ø. Gjelland Vilém Děd Antti P. Eloranta Ruben Rabaneda-Bueno Henrik Baktoft Lukáš Vejřík Ivana Vejříková Vladislav Draštík Marek Šmejkal Michaela Holubová Tomas Jůza Carolyn Rosten Zuzana Sajdlová Finn Økland Jiří Peterka
author_facet	Milan Říha Karl Ø. Gjelland Vilém Děd Antti P. Eloranta Ruben Rabaneda-Bueno Henrik Baktoft Lukáš Vejřík Ivana Vejříková Vladislav Draštík Marek Šmejkal Michaela Holubová Tomas Jůza Carolyn Rosten Zuzana Sajdlová Finn Økland Jiří Peterka
author_sort	Milan Říha
title	Contrasting structural complexity differentiate hunting strategy in an ambush apex predator
title_short	Contrasting structural complexity differentiate hunting strategy in an ambush apex predator
title_full	Contrasting structural complexity differentiate hunting strategy in an ambush apex predator
title_fullStr	Contrasting structural complexity differentiate hunting strategy in an ambush apex predator
title_full_unstemmed	Contrasting structural complexity differentiate hunting strategy in an ambush apex predator
title_sort	contrasting structural complexity differentiate hunting strategy in an ambush apex predator
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b62f7524caa346dab7e15ff4a7e4b180
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Contrasting structural complexity differentiate hunting strategy in an ambush apex predator

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