File:The crustacea of the plankton, July, 1894-Dec., 1896 (1897) (14751750466).jpg

Identifier: crustaceaofplank00birg (find matches)
Title: The crustacea of the plankton, July, 1894-Dec., 1896
Year: 1897 (1890s)
Authors: Birge, E. A. (Edward Asahel), 1851-1950
Subjects: Plankton
Publisher: (Madison : s.n.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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d number was nearlyquadrupled during the next two weeks. In 1896 Cyclops ad-vanced with even greater rapidity and about two weeks earlierthan in 1895. In each year the increase in Cyclops was abouta month in advance of that of Diaptomus or Daphnia hyalina, andin 1896, about two weeks ahead of the multiplication of Daph-nia pulicaria. The spring maximum is reached during themonth of May, either in the first or the latter part of themonth, according to the temperature. At the maximum thepopulation of the lake consists largely of Cyclops, about 70 percent, of the total in 1895, and 80 per cent, in 1896 consisting ofthis species. The multiplication of the Crustacea and rotifers during thespring seems to be more rapid than that of the algae, and in latespring at the time of the maximum, the algae are far lessnumerous with respect to the Crustacea than at any other seasonof the year. In a word, the eaters multiply in excess of thefood. This undue multiplication of the Crustacea puts a check
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