منابع مشابه
Diel epibenthic activity of mayfly nymphs, and its nonconcordance with behavioral drift l
Diel changes in the numbers and activity of mayfly (Ephemeroptera) nymphs on the substrate surface in a stony-bottom stream were determined by direct observations, to investigate the relationship between benthic activity and drift. Individuals were viewed through a glass box (0.1 m2 area) at 2-h intervals for 24 h; dim red light was used during darkness. Baetis was relatively unaffected by the ...
متن کاملTrifoliellum bioblitzii, a new genus of trichomycete from mayfly nymphs in Nova Scotia, Canada.
Trichomycetes are an ecological group of fungi and protists that colonize the gut lining of invertebrates in aquatic and moist terrestrial habitats. The diversity of this group appears to be high with many new species discovered each year. A new genus of fungal trichomycete, Trifoliellum (Harpellales), is described here with the type species T. bioblitzii. This genus is characterized by having ...
متن کاملRecruitment of Hexagenia mayfly nymphs in western Lake Erie linked to environmental variability.
After a 40-year absence caused by pollution and eutrophication, burrowing mayflies (Hexagenia spp.) recolonized western Lake Erie in the mid 1990s as water quality improved. Mayflies are an important food resource for the economically valuable yellow perch fishery and are considered to be major indicator species of the ecological condition of the lake. Since their reappearance, however, mayfly ...
متن کاملCombined effects of predatory fish and sublethal pesticide contamination on the behavior and mortality of mayfly nymphs.
We evaluated the potential interaction of pesticide effect and predatory fish on behavior and mortality of a stream mayfly. Experiments in laboratory stream microcosms compared the activity, drift, and mortality of Baetis mayfly nymphs in the absence of fish with that in the presence of Cape galaxias (Galaxias zebratus), both species inhabiting the same stream environments in the Western Cape o...
متن کاملThe role of responses to light in the selection and maintenance of microhabitat by the nymphs of two species of mayfly.
In a field investigation of the role played by shade and direct illumination on the distribution of stream fauna (Hughes, in press), two species of mayfly nymph, Baetis harrisoni Barnard and Trieorythus discolor (Burro.), were found predominantly in reaches exposed to sunlight and reaches shaded by dense vegetation respectively. The results for Baetis harrisoni bear out the conclusions reached ...
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ژورنال
عنوان ژورنال: Psyche: A Journal of Entomology
سال: 1968
ISSN: 0033-2615,1687-7438
DOI: 10.1155/1968/904597