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The vertical migration of Mysis relicta in Lakes Huron and Michigan

Journal of the Fisheries Research Board of Canada

By:
DOI: 10.1139/f60-037

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Abstract

During the day Mysis relicta could be taken only near the bottom of Lakes Huron and Michigan. In the evening they migrated into the overlying strata as the surface light intensity decreased from 15 to 1 foot-candles. Frequently the mysids migrated through the metalimnion when first ascending, but later in the night the majority occurred in or immediately below this layer. As the length of day decreased following the summer solstice, the mysids ascended progressively earlier each evening and descended later each morning (they descended when the surface light intensity was increasing from 10−3 to 10−2 foot-candle). Moonlight and fog influenced the extent and time of vertical migration.The optimum light intensity for mysids is so low that they are concentrated near the bottom during the day. As the light decreases at sunset, they move upward rapidly; possibly because of a positive reaction to decreasing light. Their night-time distribution is determined by their response to the existing light and thermal conditions. Their dawn descent may be due to a photo-negative condition which originated during the night.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The vertical migration of Mysis relicta in Lakes Huron and Michigan
Series title:
Journal of the Fisheries Research Board of Canada
DOI:
10.1139/f60-037
Volume:
17
Issue:
4
Year Published:
1960
Language:
English
Publisher:
NRC Research Press
Contributing office(s):
Great Lakes Science Center
Description:
23 p.
First page:
517
Last page:
539
Online Only (Y/N):
N
Additional Online Files (Y/N):
N