Show simple item record

dc.contributor.authorArt, Jamieen_US
dc.contributor.authorBartol, Ianen_US
dc.coverage.spatialMaple River - West Branchen_US
dc.date.accessioned2007-06-14T21:40:45Z
dc.date.available2007-06-14T21:40:45Z
dc.date.issued1991en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/54238
dc.description.abstractThe effect of current velocity and photoperiod on the behavior of the Trichoptera, Brachycentrus americanus (Banks) was studied in artificial streams. Four streams, one stagnant, one with slow current, one with moderate current, and one with fast current, were used for observations over a twenty-four hour period. Three distinct and mutually exclusive behavior types, filter feeding (attached to substrate with hind legs fanned in current), withdrawn (motionless and retracted into the case), and active non-feeding behaviors (including crawling, drifting and aggressive interactions), were recorded every two hours over three separate twenty-four hour periods. In addition, the number of individuals joined together was recorded. The study was conducted under a controlled photoperiod of ten hours of light and ten hours of darkness separated by two hour twilight periods. Differences in behavior were only apparent between the stagnant stream and those with current; the velocity of current had little effect on behavior. There was little diel periodicity to the behaviors, with only active non-feeding behaviors more prevalent between 8 pm and 6 am. This pattern may have been a result of experimental design. The significance of the results was limited by the sample size and the small number of replicates.en_US
dc.format.extent646535 bytes
dc.format.extent3144 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.relation.haspartDiagram or Illustrationen_US
dc.relation.haspartGraphen_US
dc.relation.haspartTable of Numbersen_US
dc.subjectStreamsen_US
dc.titleEffect of current velocity and photoperiod on the behavior of Brachycentrus americanus.en_US
dc.typeWorking Paperen_US
dc.subject.hlbsecondlevelNatural Resource and Environmenten_US
dc.subject.hlbtoplevelScienceen_US
dc.contributor.affiliationumBiological Station, University of Michiganen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/54238/1/2674.pdfen_US
dc.description.filedescriptionDescription of 2674.pdf : Access restricted to on-site users at the U-M Biological Station.en_US
dc.owningcollnameBiological Station, University of Michigan (UMBS)


Files in this item

Show simple item record