Vertical Migration, Hatching Rates, and Distribution of egg stages in Freshwater Zooplankton

Document Type

Article

Publication Date

10-1981

Department

Department of Biological Sciences

Abstract

In shallow, thermally stratified lakes, the developing eggs carried by pelagic crustacean zooplankton are exposed to regularly alternating higher and lower temperatures during daily vertical migration. Rate summation techniques for determining the duration of egg development suggest that (1) the distribution of egg stages in the population will not change because of the alternating temperatures, and (2) the majority of young animals will not be hatched or released in the warmer, upper waters of the lake. This latter result is probably positively adaptive, but it may be brought about entirely mechanistically by the more rapid development in warmer waters.

Publisher's Statement

© 1981

Publication Title

Journal of Thermal Biology

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