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Shifts in fish vertical distribution in response to an internal seiche in a stratified lake
Author(s) -
Levy David A.,
Johnson Robert L.,
Hume Jeremy M.
Publication year - 1991
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1991.36.1.0187
Subject(s) - seiche , thermocline , transect , geology , internal wave , stratification (seeds) , oceanography , fish <actinopterygii> , thermal stratification , juvenile , ecology , fishery , biology , seed dormancy , botany , germination , dormancy
Juvenile sockeye salmon in Quesnel Lake were nocturnally thermoselective and distributed in a narrow vertical band within the thermocline. Differences in vertical position across and between lake transects occurred when an internal seiche was active, as evidenced by a short‐term alteration in the thermal structure of the lake. The results provide qualitative evidence for a direct relationship between Quesnel Lake physics and the vertical distribution of juvenile sockeye.