LIMNOLOGY OF THE MIDDLE MISSISSIPPI RIVER. III. MAYFLY POPULATIONS IN RELATION TO NAVIGATION WATER-LEVEL CONTROL1

Autor:	Troy C. Dorris, B. J. Copeland
Rok vydání:	1962
Předmět:	Shore Hydrology Mayfly Geography geography.geographical_feature_category biology Limnology Aquatic Science Oceanography biology.organism_classification Channel (geography) Water level
Zdroj:	Limnology and Oceanography. 7:240-247
ISSN:	0024-3590
DOI:	10.4319/lo.1962.7.2.0240
Popis:	Naiad populations of the mayfly HFlexage& rigida were studied in an isolated channel of the Mississippi River. Egg-laying by adult females was concentrated at the upper end of the channel. Numbers of naiads were greatest at the upstream end of the channel during most of each summer. The rxaiads moved downstream prior to emergence. Following a winter in which the water level was drawn down about 4 ft for 6 weeks, the numbers of naiads were reduced at all stations. Populations near shore were reduced more than those in deeper water.
Databáze:	OpenAIRE
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