Details

Autor(en) / Beteiligte

• Johnson, James H.

Titel

Diel variation in summer habitat use, feeding periodicity, and diet of subyearling Atlantic salmon in the Salmon River Basin, New York

Ist Teil von

• Journal of Great Lakes research, 2013-09, Vol.39 (3), p.493-498

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The habitat use, diet composition, and feeding periodicity of subyearling Atlantic salmon (Salmo salar) was examined during both day and night periods during summer in tributaries of Lake Ontario. The amount of cover used was the major habitat variable that differed between day and night periods in both streams. At night subyearling Atlantic salmon were associated with significantly less cover than during the day. Principal Component Analysis showed that habitat selection of subyearling Atlantic salmon was more pronounced during the day in both streams and that salmon in Orwell Brook exhibited more diel variability in habitat use than salmon in Trout Brook. Subyearling salmon fed primarily from the benthic substrate on baetids, chironomids, and leptocerids. There was a substantial amount of diel variation in diet composition with peak feeding occurring from 0400h to 0800h on July 21–22, 2008. •Amount of cover used was the major habitat variable that differed between day and night periods.•Salmon fry were associated with significantly less cover during the night.•Habitat selection by subyearling Atlantic salmon was more pronounced during the day.•Peak feeding of salmon fry occurred from 0400h to 0800h.•Feeding consisted primarily of aquatic insects taken from the substrate.