Sequential analysis of aggressive interactions in the stalk-eyed fly Teleopsis dalmanni (original) (raw)

Abstract

Understanding the mechanisms and determinants of conflict resolution is of great theoretical and practical importance because the outcome of contests between males over limited resources such as mates, territories, and food has profound fitness consequences. Despite the large literature on the theory of conflict resolution, relatively few empirical studies explicitly test predictions related to contest structure for these models. In sexually dimorphic species of stalk-eyed flies (Diopsidae), males engage in characteristic aggressive interactions over both females and food resources. We used sequential analysis of aggressive interactions between dyads of male stalk-eyed flies to investigate patterns of escalation, behavioral matching, and physical contact in order to distinguish between three common models of conflict resolution: the sequential assessment model, the cumulative assessment model, and the energetic war of attrition. Stalk-eyed flies were shown to engage in both low- and high-intensity behaviors during interactions with patterns of escalation and no de-escalation. Aggressive interactions did not demonstrate behavioral matching between winners and losers. Stalk-eyed flies also escalated to behaviors that included physical contact without injuries. Our results provide support for the sequential assessment model based on patterns of escalation with no de-escalation, behavioral mismatching, and behaviors which include physical contact but no injuries.

Access this article

Log in via an institution

Subscribe and save

Buy Now

Price includes VAT (Germany)

Instant access to the full article PDF.

Similar content being viewed by others

References

Download references

Acknowledgements

We thank Sarah Magdanz and Kassidy Boyd for stalk-eyed fly care and maintenance and Amy Worthington for helping formulate the approach using sequential analysis for stalk-eyed flies and for comments throughout the writing process. Thank you to Jerry Wilkinson for providing pupae for our own colonies of flies and Sol Redlin for construction of the arenas where the interactions took place. We acknowledge Jerry Husak and Jake Kerby for comments and critiques on the many drafts of the manuscript. This research was conducted with support from a National Science Foundation CAREER award IOB-0448060 to John Swallow and grants to Yoni Brandt and John Swallow from The Center for Biomedical Research Excellence at the University of South Dakota and from the South Dakota National Aeronautics and Space Administration Experimental Program to Stimulate Competitive Research.

Ethical standards

The work in this study was carried out with the highest ethical standards according to the laws of the country in which the work was performed.

Conflicts of interest

The authors declare they have no conflict of interest.

Author information

Authors and Affiliations

  1. Department of Biology, The University of South Dakota, 414 E Clark St, Churchill-Haines 179, Vermillion, SD, 57069, USA
    Alison R. Egge, Yoni Brandt & John G. Swallow

Authors

  1. Alison R. Egge
    You can also search for this author inPubMed Google Scholar
  2. Yoni Brandt
    You can also search for this author inPubMed Google Scholar
  3. John G. Swallow
    You can also search for this author inPubMed Google Scholar

Corresponding author

Correspondence toJohn G. Swallow.

Additional information

Communicated by T. Moore

Electronic supplementary material

Below is the link to the electronic supplementary material.

Supplemental Table 1

Matrix of behaviors from the overall analysis of aggressive behaviors of stalk-eyed flies. Behaviors on the left are the preceding behavior in transition followed by the behavior listed at the top. For example, away is followed by line up eye stalks 122 times. Bolded numbers indicate significant transitions that occurred over 10% of the time (DOC 42 kb)

Rights and permissions

About this article

Cite this article

Egge, A.R., Brandt, Y. & Swallow, J.G. Sequential analysis of aggressive interactions in the stalk-eyed fly Teleopsis dalmanni .Behav Ecol Sociobiol 65, 369–379 (2011). https://doi.org/10.1007/s00265-010-1054-5

Download citation

Keywords