Fishery discards impact on seabird movement patterns at regional scales

Current Biology : CB
Frederic BartumeusSimon A Levin

Abstract

Human fishing activities are negatively altering marine ecosystems in many ways [1, 2], but scavenging animals such as seabirds are taking advantage of such activities by exploiting fishery discards [3-5]. Despite the well-known impact of fisheries on seabird population dynamics [6-10], little is known about how discard availability affects seabird movement patterns. Using scenarios with and without trawling activity, we present evidence that fisheries modify the natural way in which two Mediterranean seabirds explore the seascape to look for resources during the breeding season. Based on satellite tracking data and a mathematical framework to quantify anomalous diffusion phenomena, we show how the interplay between traveling distances and pause periods contributes to the spatial spreading of the seabirds at regional scales (i.e., 10-250 km). When trawlers operate, seabirds show exponentially distributed traveling distances and a strong site fidelity to certain foraging areas, the whole foraging process being subdiffusive. In the absence of trawling activity, the site fidelity increases, but the whole movement pattern appears dominated by rare but very large traveling distances, making foraging a superdiffusive process. Our res...Continue Reading

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Citations

Jun 3, 2011·Journal of Mathematical Biology·Luca Giuggioli, Frederic Bartumeus
Nov 30, 2012·Demography·John R B PalmerKathleen Li
Apr 25, 2012·Proceedings of the National Academy of Sciences of the United States of America·Nicolas E HumphriesDavid W Sims
Aug 26, 2011·Biology Letters·Judy Shamoun-BaranesC J Camphuysen
Oct 25, 2013·Journal of the Royal Society, Interface·Daniel CamposXavier Espadaler
Mar 23, 2011·PLoS Computational Biology·Luca GiuggioliStephen Harris
Nov 11, 2011·PLoS Computational Biology·E P RaposoG M Viswanathan
May 17, 2012·PLoS Computational Biology·Sepideh BazaziIain D Couzin
Dec 18, 2013·Ecology and Evolution·Samantha C PatrickHenri Weimerskirch
Mar 27, 2010·The Journal of Animal Ecology·Luca Giuggioli, Frederic Bartumeus
Oct 10, 2013·The Journal of Animal Ecology·Stefano Focardi, Jacopo G Cecere
Oct 19, 2013·Ecology Letters·Daniel OroAlejandro Martínez-Abraín
Jun 30, 2015·Ecology and Evolution·Manuel García-TarrasónCarolina Sanpera
Jul 3, 2015·Proceedings. Biological Sciences·Andrew M ReynoldsStefano Focardi
Apr 24, 2015·Proceedings. Biological Sciences·Andrea KölzschJohan van de Koppel
Dec 30, 2014·Theoretical Population Biology·G S Jacobs, T J Sluckin
Nov 24, 2016·Scientific Reports·Andrea Soriano-RedondoJacob González-Solís
Jun 22, 2019·Science Advances·Nobuaki Mizumoto, Shigeto Dobata
Feb 26, 2016·Ecological Applications : a Publication of the Ecological Society of America·Ana Payo-PayoGiacomo Tavecchia
Apr 29, 2020·Movement Ecology·Yaiza Parra-TorresJoan Navarro
Jul 26, 2017·Conservation Physiology·Kim Birnie-GauvinSteven J Cooke
Jan 8, 2020·Movement Ecology·Alejandro SotilloLuc Lens
Dec 22, 2020·The Ibis·Anouk SpeltShane Windsor
Feb 8, 2021·The Journal of Animal Ecology·José Manuel Reyes-GonzálezJacob González-Solís
May 4, 2010·The Journal of Experimental Biology·Nigel R FranksAna B Sendova-Franks
Oct 11, 2021·Movement Ecology·Jordi F PagèsTeresa Alcoverro

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