In-river behaviour and freshwater return rates of sea trout, Salmo trutta L., from two coastal river populations

Simple item page
dc.contributor.authorKennedy, Richard
dc.contributor.authorBarry, James
dc.contributor.authorRoche, William
dc.contributor.authorRosell, Robert S.
dc.contributor.authorAllen, Michelle M.
dc.date.accessioned2022-08-23T08:25:49Z
dc.date.available2022-08-23T08:25:49Z
dc.date.issued2022-07-22
dc.descriptionPublication history: Accepted - 9 July 2022; Published online - 14 July 2022.en_US
dc.description.abstractThe effective management of anadromous Salmo trutta resources is challenging because long-term data on life history, phenology and survival are sparse and most stocks across the range are highly diverse and data-limited. The current study employed acoustic telemetry to tag 448 sea trout across three life stages, to describe the phenology, spawning behaviour and return rates of smolts, finnock (0+ sea age) and adult (≥1+ sea age) sea trout in two Irish river systems during 2018–2021. Tagged smolts (n = 206) exhibited river to sea transition rates of 78%–92% and a number of surviving smolts returned to their natal river as 0+ sea age finnock, exhibiting overall smolt to finnock return rates of between 6% and 17%. Short-term vagrancy occurred among smolts, and 14 individuals were detected in adjacent nonnatal rivers. Finnock tagged during the late summer (n = 205) exhibited a range of behaviours with a minority (<30%) ascending upstream to spawning areas. Tagged adult sea trout (n = 37) ascended upstream to the spawning grounds and between 50% and 80% successfully returned to sea as kelts after spawning. Subsequent return rates of kelts back to the river in the following year ranged from 9% to 40%. The current study indicated that body size was an influential predictor of behaviour and survival across all three life stages. Increased body size was positively associated with marine transition success in smolts, long-term marine survival in kelts and spawning behaviour in finnock. This work further demonstrates the complexity of sea trout life-history dynamics and provides a comparative perspective across different age classes. An understanding of life-history variation, behaviour and survival is fen_US
dc.description.sponsorshipThis work was conducted under the COMPASS project which has been supported by the EU's INTERREG VA Programme, managed by the Special EU Programmes Body. The views and opinions expressed in this document do not necessarily reflect those of the European Commission or the Special EU Programmes Body (SEUPB). Thanks to J. O'Callaghan (IFI), A. Kane and A. Moore (AFBI) and G. Marshall for practical assistance. Thanks to Inland Fisheries Ireland and DAERA field staff and to the Shimna Angling Club and the Dundalk and District Brown Trout and Salmon Anglers Association for support and assistance.en_US
dc.identifier.citationKennedy, R.J., Barry, J., Roche, W., Rosell, R. and Allen, M. (2022) ‘In‐river behaviour and freshwater return rates of sea trout, Salmo trutta <scp>L</scp> ., from two coastal river populations’, Journal of Fish Biology. Wiley. doi:10.1111/jfb.15162.en_US
dc.identifier.issn0022-1112
dc.identifier.issn1095-8649
dc.identifier.urihttps://doi.org/10.1111/jfb.15162
dc.language.isoenen_US
dc.publisherWileyen_US
dc.rightsCopyright 2022 Fisheries Society of the British Isles This work is made available online in accordance with the publisher's policies. Please refer to any applicable terms of use of the publisher.en_US
dc.subjectanadromyen_US
dc.subjectlife-historyen_US
dc.subjectsalmonidsen_US
dc.subjecttelemetryen_US
dc.titleIn-river behaviour and freshwater return rates of sea trout, Salmo trutta L., from two coastal river populationsen_US
dc.typeArticleen_US
dcterms.dateAccepted2022-07-09
dcterms.dateSubmitted2022-03-23

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
In-river behaviour and freshwater return rates of sea trout, Salmo trutta L., from two coastal river populations.pdf
Size:
352.89 KB
Format:
Adobe Portable Document Format
Description:
Accepted Manuscript
Download

Collections

Journal Articles