Nocturnal activity of juvenile Atlantic salmon (Salmo salar) in late summer: evidence of diel activity partitioning
Publication Date
1997
Journal or Book Title
Canadian Journal Of Fisheries And Aquatic Sciences
Abstract
Paired day-night underwater counts of juvenile Atlantic salmon (Salmo salar) were completed on tributaries of the West River, Vermont, U.S.A., between 28 August and 10 September 1995. At water temperatures ranging from 13 to 23°C, the relative count of juvenile salmon was greater at night. Nocturnal counts differed for young-of-the-year and post-young-of-the-year (PYOY) salmon, with PYOY exhibiting almost exclusive nocturnal activity. Nocturnal activity in late summer may enable salmon to maintain population densities when space and suitable feeding areas may be limited. Nocturnal activity of juvenile salmon should be considered in studies of habitat use, competition, time budgets, and associated bioenergetic processes.
DOI
https://doi.org/10.1139/f97-046
Volume
54
Issue
6
Pages
1408-1413
Recommended Citation
Gries, G; Whalen, KG; Juanes, F; and Parrish, DL, "Nocturnal activity of juvenile Atlantic salmon (Salmo salar) in late summer: evidence of diel activity partitioning" (1997). Canadian Journal Of Fisheries And Aquatic Sciences. 234.
https://doi.org/10.1139/f97-046