Spawning-related movements in a salmonid appear timed to reduce exposure to visually oriented predators

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dc.contributor.authorFinlay, Ross W.
dc.contributor.authorPoole, Russell
dc.contributor.authorFrench, Andrew S.
dc.contributor.authorPhillips, Karl P.
dc.contributor.authorKaufmann, Joshka
dc.contributor.authorDoogan, Aisling
dc.contributor.authorCotter, Deirdre
dc.contributor.authorMcGinnity, Philip
dc.contributor.authorReed, Thomas E.
dc.contributor.funderHorizon 2020en
dc.contributor.funderEuropean Research Councilen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderMarine Institute, Irelanden
dc.date.accessioned2021-07-01T16:46:49Z
dc.date.available2021-07-01T16:46:49Z
dc.date.issued2020-11-07
dc.date.updated2021-07-01T16:37:13Z
dc.description.abstractAnimals often exhibit extensive flexibility in movement behaviours on a range of temporal and spatial scales in response to cues that reliably predict fitness outcomes. The annual timing of movements between distinct habitats can be crucial, particularly in seasonal environments with narrow ecological windows of opportunity. In polygamous species, sexual selection may further shape sex-specific phenology and movement behaviours. Here, we characterized seasonal, daily and diel movement patterns in adult brown trout, Salmo trutta, between a lake feeding habitat and two spawning streams in northwestern Ireland, using passive integrated transponder (PIT) telemetry. Antennae positioned at the inflow and outflow of the lake were used to monitor movements of 197 lake-tagged adults between lake and stream habitats. Across 2 years in both streams, movements were overwhelmingly nocturnal and exhibited distinct seasonality, with a peak in daily detections close to the winter solstice. In both streams, seasonal movement activity of males began and peaked before that of females (protandry). Daily detection probabilities for both sexes increased as the moon waned (decreasing lunar illumination) and as river depth increased, the latter being associated with reduced water clarity. These findings are consistent with fish favouring movement between fluvial and lacustrine habitats when light (both solar and lunar) or hydrological conditions decrease their exposure to visually oriented predators. The observed protandry also suggests a role for intrasexual male competition, whereby earlier male arrival could increase mating opportunities.en
dc.description.sponsorshipMarine Institute, Ireland ((Cullen Fellowship award CF/15/06); (Marine Research Programme 2014–2020 RESPI/FS/16/01)); Science Foundation Ireland (SFI-DEL grant (2015 15/IA/3028)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationFinlay, R. W., Poole, R., French, A. S., Phillips, K. P., Kaufmann, J., Doogan, A., Cotter, D., McGinnity, P. and Reed, T. E. (2020) 'Spawning-related movements in a salmonid appear timed to reduce exposure to visually oriented predators', Animal Behaviour, 170, pp. 65-79. doi: 10.1016/j.anbehav.2020.10.004en
dc.identifier.doi10.1016/j.anbehav.2020.10.004en
dc.identifier.endpage79en
dc.identifier.issn0003-3472
dc.identifier.journaltitleAnimal Behaviouren
dc.identifier.startpage65en
dc.identifier.urihttps://hdl.handle.net/10468/11531
dc.identifier.volume170en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::ERC::ERC-STG/639192/EU/Alternative life histories: linking genes to phenotypes to demography/ALHen
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0003347220302931
dc.rights© 2020 The Authors. Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectEnvironmental cuesen
dc.subjectMigration timingen
dc.subjectPhenologyen
dc.subjectPredator avoidanceen
dc.subjectProtandryen
dc.subjectReproductionen
dc.subjectSalmo truttaen
dc.subjectTrouten
dc.subjectNocturnal passerine migrantsen
dc.subjectDiel vertical migrationen
dc.subjectBrown trouten
dc.subjectAtlantic salmonen
dc.subjectReproductive successen
dc.subjectTrutta l.en
dc.subjectHabitat selectionen
dc.subjectOntogenic nicheen
dc.subjectSockeye salmonen
dc.subjectBird migrationen
dc.titleSpawning-related movements in a salmonid appear timed to reduce exposure to visually oriented predatorsen
dc.typeArticle (peer-reviewed)en
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