, Volume 543, Issue 1, pp 113–118 | Cite as

Predator density and dissolved oxygen affect body condition of Stenonema tripunctatum (Ephemeroptera, Heptageniidae) from intermittent streams

  • Joseph W. Love
  • Christopher M. Taylor
  • Melvin L. WarrenJr.
Primary Research Paper


The effects of population density, fish density, and dissolved oxygen on body condition of late-instar nymphs of Stenonema tripunctatum (Ephemeroptera, Heptageniidae) were investigated using nymphs sampled from isolated, upland stream pools over summer in central Arkansas, USA. All three factors exhibited high variation among pools. Body condition was negatively related to fish density, and positively related to dissolved oxygen (when included in the model). High fish densities may be related to low body condition because they cause reduced foraging or force earlier emergence at small body sizes. These results emphasize the combined effects of biotic and abiotic factors on body condition in mayflies, and support earlier findings that population density is a less-important factor.


hypoxia mayfly predation threat Ouachita Mountains Arkansas 


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Copyright information

© Springer 2005

Authors and Affiliations

  • Joseph W. Love
    • 1
  • Christopher M. Taylor
    • 2
  • Melvin L. WarrenJr.
    • 3
  1. 1.Living Marine Resources Cooperative Science CenterUniversity of MarylandEastern Shore, Princess AnneUSA
  2. 2.Department of Biological SciencesP.O. Drawer GY, Mississippi State UniversityMississippi StateUSA
  3. 3.Forest Hydrology LabU.S.D.A. Forest Service, Southern Research StationOxfordUSA

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