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Production and standing crop of Hexagenia (Ephemeroptera) in a large reservoir

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Production and standing crop of Hexagenia (Ephemeroptera) in a large reservoir; 1972; Article; Journal; Studies in Natural Sciences; Hudson, P. L.; Swanson, G. A.

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Population dynamics of the mayflies, Hexagenia limbata (Serville) and Hexagenia bilineata (Say), were studied in Lewis and Clark Lake from 1962 to 1969. Nymphs that hatched in June and July emerged as adults in 13-14 months (titled 1-year cycle) and nymphs hatched in late August or September emerged in 22 months (titled 2-year cycle). Although an estimated 79% of the newborn nymphs begin life in the 2-year cycle group, only 53% of the emergent adults were in this group because of mortality. Standing crop was highest in the shore area, although a major migration away from the shore occurred in the spring. This migration was most intense when the population density exceeded 100/m2. Biomass ranged from 260 to 1070 mg/m2 dry weight over [...]

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Harvested on Mon Jul 21 13:47:02 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 1001458
local-pk unknown 1001458
series unknown Studies in Natural Sciences

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journalStudies in Natural Sciences
parts
typevolume
value1
typeissue
value4
languageEnglish
citationTypeArticle

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