FN Archimer Export Format
PT J
TI Predicting how environmental conditions and smolt body length when entering the marine environment impact individual Atlantic salmon Salmo salar adult return rates
BT 
AF Simmons, O.M.
   Britton, J.R.
   Gillingham, P.K.
   Nevoux, M.
   Riley, W.D.
   Rivot, E.
   Gregory, S.D.
AS 1:1,2;2:1;3:1;4:3,4;5:5;6:3,4;7:2,6;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Department of Life and Environmental Sciences, Faculty of Science and Technology Bournemouth University, Poole Dorset ,UK
   Salmon and Trout Research Centre Game and Wildlife Conservation Trust, Wareham Dorset ,UK
   DECOD, Ecosystem Dynamics and Sustainability Institut Agro, INRAE, Ifremer Rennes, France
   MIAME‐ Management of Diadromous Fish in their Environment OFB, INRAE, Institut Agro, UNIV PAU & PAYS ADOUR/E2S UPPA Rennes ,France
   The Centre for Environment Fisheries and Aquaculture Science, Lowestoft Suffolk,UK
   The Centre for Environment Fisheries and Aquaculture Science, Weymouth Dorset ,UK
C2 UNIV BOURNEMOUTH, UK
   GWCT, UK
   INST AGRO RENNES-ANGERS, FRANCE
   UNIV RENNES, FRANCE
   CEFAS, UK
   CEFAS, UK
UM DECOD
IN WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2
TC 5
UR https://archimer.ifremer.fr/doc/00734/84578/89651.pdf
LA English
DT Article
DE ;anadromous salmonid;body size;sea bass;state-space model;survival;temperature
AB Populations of Atlantic salmon Salmo salar have experienced precipitous declines in abundance since the 1970s. This decline has been associated with reduced numbers of adult salmon returning to freshwater from their marine migration, i.e., their marine return rates (MRR). Thus, understanding the factors that affect MRR is of crucial conservation importance. We used a state-space model with a 13-year time series of individually tagged salmon mark-recapture histories on the River Frome, southern England, to test the effect of smolt body length on their MRR. As well as smolt length, the model tested for the influence of environmental covariates that were representative of the conditions experienced by the smolts in the early stages of their seaward migration, i.e., from the lower river to the estuary exit. The model indicated that, even when accounting for environmental covariates, smolt body length was an important predictor of MRR. While larger smolts have a higher probability of returning to their natal river as adults than smaller smolts, and one-sea-winter salmon have a survival rate twice as high as multi-sea-winter salmon, the actual biological mechanisms underpinning this phenomenon remain uncertain. These results have important applications for salmon conservation, as efforts to bolster salmon populations in the freshwater environment should consider ways to improve smolt quality (i.e., body size) as well as smolt quantity. 
PY 2022
PD AUG
SO Journal Of Fish Biology
SN 0022-1112
PU Wiley
VL 101
IS 2
UT 000723011700001
BP 378
EP 388
DI 10.1111/jfb.14946
ID 84578
ER

EF