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Increased phototaxis in the field leads to enhanced diel vertical migration
Author(s) -
Ringelberg J.,
Flik B. J. G.
Publication year - 1994
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.1994.39.8.1855
Subject(s) - diel vertical migration , phototaxis , biology , dusk , light intensity , ecology , environmental science , physics , optics , botany
Downward and upward displacement velocity of diel vertical migration in Lake Maarsseveen by the hybrid Daphnia galeata × hyalina, was correlated with the relative change in light intensity at dawn and dusk, indicating a phototactic basis for these migrations. The significance of the regression function increased over a period of 4 yr. Changes in environmental factors such as water transparency and food concentration are not responsible.