Atlantic salmon return rate increases with smolt length
| العنوان: | Atlantic salmon return rate increases with smolt length |
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| المؤلفون: | Phillipa K. Gillingham, Anton T. Ibbotson, I. C. Russell, Etienne Rivot, J. Robert Britton, Marie Nevoux, Rasmus B. Lauridsen, Stephen D. Gregory, W. D. Riley, Olivia M. Simmons |
| المساهمون: | Salmo and Trout Research Centre, The Game and Wildlife Conservation Trust, Centre for Environment, Fisheries and Aquaculture Science [Lowestoft] (CEFAS), Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Bournemouth University [Poole] (BU), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
| المصدر: | ICES Journal of Marine Science ICES Journal of Marine Science, Oxford University Press (OUP), 2019, ⟨10.1093/icesjms/fsz066⟩ ICES Journal of Marine Science, Oxford University Press (OUP), 2019, 76 (6), pp.1702-1712. ⟨10.1093/icesjms/fsz066⟩ |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, Atlantic salmon, [SDE.MCG]Environmental Sciences/Global Changes, Salmo salar, salmonid, Bayesian inference, Aquatic Science, Body size, Oceanography, 010603 evolutionary biology, 01 natural sciences, survival, size effect, Statistical analyses, Juvenile, 14. Life underwater, Salmo, Ecology, Evolution, Behavior and Systematics, Rate of return, State-space models, Ecology, biology, smolt body size, 010604 marine biology & hydrobiology, biology.organism_classification, freshwater life-stages, restoration effort, passive integrated transponder (PIT), Fishery, juvenile, marine survival, state space model, [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery, probability to return as adult, [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| الوصف: | Recent declines in Atlantic salmon Salmo salar populations are generally attributed to factors in their marine life-phase. However, it is postulated that factors affecting their freshwater life-phase might impact their marine survival, such as the influence of body size. While larger smolts are widely hypothesized to have higher marine survival rates, empirical support remains scant, in part due to inadequate data and ambiguous statistical analyses. Here, we test the influence of smolt body size on marine return rates, a proxy for marine survival, using a 12-year dataset of 3688 smolts tagged with passive integrated transponders in the River Frome, Southern England. State-space models describe the probability of smolts surviving their marine phase to return as 1 sea-winter (1SW) or multi-sea-winter adults as a function of their length, while accounting for imperfect detection and missing data. Models predicted that larger smolts had higher return rates; the most parsimonious model included the effect of length on 1SW return rate. This prediction is concerning, as freshwater juvenile salmon are decreasing in size on the River Frome, and elsewhere. Thus, to maximize adult returns, restoration efforts should focus on freshwater life-stages, and maximize both the number and the size of emigrating smolts. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1054-3139 1095-9289 |
| DOI: | 10.1093/icesjms/fsz066⟩ |
| DOI: | 10.1093/icesjms/fsz066/5481490 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90933db51644acb91bad80f9626e68e1 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....90933db51644acb91bad80f9626e68e1 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10543139 10959289 |
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| DOI: | 10.1093/icesjms/fsz066⟩ |