Microdistribution and secondary production of Cyrnellus fraternus (Trichoptera : Polycentropodidae) from snag habitats in the Elm Fork of the Trinity River, Texas

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dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
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dc.contributor.authorJohnson ZBen_US
dc.contributor.authorRiggs AKen_US
dc.contributor.authorKennedy JHen_US
dc.contributor.otherAnnals of the Entomological Society of Americaen_US
dc.date.accessioned2010-02-15T17:18:07Z
dc.date.available2010-02-15T17:18:07Z
dc.date.issued1998 Sepen_US
dc.degreeen_US
dc.description641-646en_US
dc.description-otheren_US
dc.description.abstractA population of Cyrnellus fraternus (Banks) from an 8-km segment of the Elm Fork in north Texas was sampled once to twice monthly from October 1994 through September 1995. Distributions of C. fraternus were restricted to submerged wood habitat, or snag, the most stable substratum for retreat building and for resisting periodic high waters. Larvae were not found in the soft sand and mud benthic habitats near submerged wood. The insects were multivoltine with a minimum of 3 generations per year. Pupae were collected from July to September and adults emerge from May to October. The population overwintered as larvae. Individual dry mass of autumn 1994 fifth instars was significantly larger than that of summer 1995 fifth instars. Estimated annual production on snags for this population was 1,015.4 mg/m(2)/yr, mean standing stock biomass was 61.24 mg/m(2), cohort production:biomass ratio was 4.59, and the annual production/biomass rate was 16.58/yr. Standing stock biomass ranged from 1.6-319.1 mg/m(2) during the year. Standing stock biomass values were significantly higher in autumn and. summer than in winter. Larvae were more abundant in the lower portions of the study area, where now was reduced for much of the year, than in the upper reaches, characterized by higher current velocities. C. fraternus larvae were found in their highest numbers on snags with dense deposits of silt and sanden_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23587
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 0ArticleEnglishJohnson, Z. BUniv N Texas, Dept Biol Sci, Denton, TX 76203 USACited References Count: 33124YW9301 ANNAPOLIS RD, LANHAM, MD 20706 USALANHAMen_US
dc.placeen_US
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dc.relation.ispartofseries51241.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectBIOMASSen_US
dc.subjectCOARSE WOODY DEBRISen_US
dc.subjectCyrnellus fraternusen_US
dc.subjectdistributionen_US
dc.subjectDISTRIBUTIONSen_US
dc.subjectDYNAMICSen_US
dc.subjecthabitaten_US
dc.subjectHABITATSen_US
dc.subjectLARVAEen_US
dc.subjectLIFE-HISTORYen_US
dc.subjectmicrodistributionen_US
dc.subjectsnagsen_US
dc.subjectSTREAMSen_US
dc.subjectTEXASen_US
dc.subjectTrinity Riveren_US
dc.subjectTXen_US
dc.subjectUSAen_US
dc.subjectWATERen_US
dc.subjectWATERSen_US
dc.subjectWINTERen_US
dc.titleMicrodistribution and secondary production of Cyrnellus fraternus (Trichoptera : Polycentropodidae) from snag habitats in the Elm Fork of the Trinity River, Texasen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue91(5)en_US

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