Warm winters and cool springs negatively influence recruitment of Atlantic salmon (Salmo salar L.) in a southern England chalk stream.

Autor: Marsh JE; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK.; Department of Life and Environmental Sciences, Bournemouth University, Dorset, UK., Lauridsen RB; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Riley WD; The Centre for Environment, Fisheries and Aquaculture Science, Lowestoft, Suffolk, UK., Simmons OM; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK.; Department of Life and Environmental Sciences, Bournemouth University, Dorset, UK., Artero C; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Scott LJ; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Beaumont WRC; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Beaumont WA; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Davy-Bowker J; Department of Life and Environmental Sciences, Bournemouth University, Dorset, UK.; Freshwater Biological Association, River Laboratory, Dorset, UK.; Natural History Museum, London, UK., Lecointre T; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Roberts DE; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK., Gregory SD; Salmon and Trout Research Centre, Game and Wildlife Conservation Trust, River Laboratory, Dorset, UK.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2021 Sep; Vol. 99 (3), pp. 1125-1129. Date of Electronic Publication: 2021 May 10.
DOI: 10.1111/jfb.14760
Abstrakt: Previous work suggests that juvenile salmon recruitment in rain-fed rivers is negatively influenced by warm and wet winters and cool springs. We tested whether this is generally applicable to a southern England chalk stream characterized by comparatively stable discharges and temperatures. We found that warm spawning and cool emergence temperatures negatively influenced juvenile recruitment between 2015 and 2020. Together these findings suggest an ability to predict juvenile productivity from water temperature records around spawning and fry emergence, thereby allowing time for management interventions in years of unfavourable temperatures.
(© 2021 Fisheries Society of the British Isles.)
Databáze: MEDLINE
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