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Diel activity patterns of juvenile Atlantic salmon in rivers with summer water temperature near the temperature-dependent suppression of diurnal activity.

Johnston, Patricia; Bergeron, Normand; Dodson, Julian J. (2004). Diel activity patterns of juvenile Atlantic salmon in rivers with summer water temperature near the temperature-dependent suppression of diurnal activity. Journal of Fish Biology , vol. 65 , nº 5. p. 1305-1318. DOI: 10.1111/j.0022-1112.2004.00532.x.

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Résumé

Direct day and night underwater observations of juvenile Atlantic salmon Salmo salar during summer and autumn showed a duality in response to temperature between 7 and 11°C for young‐of‐the‐year (YOY) Atlantic salmon. They were predominantly diurnal in early summer and nocturnal in late summer although water temperatures were similar. Post‐YOY Atlantic salmon did not show a strong response to temperature as they were mostly nocturnal during the study period. It is suggested that the difference in activity patterns between YOY and post‐YOY Atlantic salmon can be explained by size‐dependent trade‐off between growth and predation risk.

Type de document: Article
Mots-clés libres: diel patterns; nocturnal activity; Salmo salar
Centre: Centre Eau Terre Environnement
Date de dépôt: 11 janv. 2021 15:02
Dernière modification: 11 janv. 2021 15:02
URI: http://espace.inrs.ca/id/eprint/11036

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