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Behavioral Ecology and Sociobiology

, Volume 21, Issue 5, pp 307–311 | Cite as

Male red-winged blackbirds (Agelaius phoeniceus) assess the RHP of neighbors by watching contests

  • Scott Freeman
Article

Summary

Motivation to fight and willingness to risk the use of dangerous weapons, two factors which can be decisive in predicting the winners of asymmetric animal contests, are readily bluffed in display. When contests are decided by motivation to fight or “daring”, more reliable information about contest asymmetries may be gained by watching actual fights than by watching displays. By presenting mounts to territorial red-winged blackbirds and scoring how aggressively a territory holder attacks the mount, then recording any subsequent intrusions over established boundaries, I showed that neighbors are likely to intrude upon focal males that fail to attack the mount vigorously. This result suggests that red-winged blackbirds watch contests to assess the RHP of neighbors.

Keywords

Reliable Information Focal Male Territory Holder Agelaius Phoeniceus Actual Fight 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Barlow GW, Rogers W, Fraley N (1986) Do Midas cichlids win through prowess or daring? It depends. Behav Ecol Sociobiol 19:1–8Google Scholar
  2. Clutton-Brock TH, Albon SD (1979) The roaring of red deer and the evolution of honest advertisement. Behav 119:145–170Google Scholar
  3. Clutton-Brock TH, Albon SD, Gibson RM, Guinness FE (1979) The logical stag: adaptive aspects of fighting in red deer (Cervus elaphus L.). Anim Behav 27:211–225Google Scholar
  4. Davies NB, Halliday TR (1978) Deep croaks and fighting assessment in toads Bufo bufo. Nature 391:56–58Google Scholar
  5. Ewald PW, Rohwer S (1982) Effects of supplemental feeding on timing of breeding, clutch-size and polygyny in red-winged blackbirds Agelaius phoeniceus. J Anim Ecol 51:429–450Google Scholar
  6. Hansen AJ, Rohwer S (1986) Coverable badges and resource defence in birds. Anim Behav 34:69–76Google Scholar
  7. Mason JR, Reidinger RF (1981) Effects of social facilitation and observational learning on feeding behavior of the red-winged blackbird (Agelaius phoeniceus). Auk 98:778–784Google Scholar
  8. Mason JR, Reidinger RF (1982) Observational learning of food aversions in red-winged blackbirds (Agelaius phoeniceus). Auk 99:548–554Google Scholar
  9. Maynard Smith J (1974) The theory of games and the evolution of animal conflicts. J Theor Biol 47:209–221Google Scholar
  10. Maynard Smith J (1976) Evolution and the theory of games. Am Sci 64:41–45Google Scholar
  11. Maynard Smith J, Parker GA (1976) The logic of asymmetric contests. Anim Behav 24:159–175Google Scholar
  12. Maynard Smith J, Price GR (1973) The logic of animal conflict. Nature (Lond) 246:15–18Google Scholar
  13. Morton CS (1977) On the occurrence and significance of motivation-structural rules in some birds and mammal sounds. Am Nat 981:855–869Google Scholar
  14. Orians GH (1980) Some adaptations of marsh-nesting blackbirds. Princeton Univ Press, PrincetonGoogle Scholar
  15. Orians GH, Christman GM (1968) A comparative study of the behavior of Red-winged, Tricolored, and Yellow-headed blackbirds. Univ Cal Publ Zool 85:1–81Google Scholar
  16. Parker GA (1974) Assessment strategy and the evolution of fighting behaviour. J Theor Biol 47:223–243Google Scholar
  17. Parker GA, Rubenstein DI (1981) Role assessment, reserve strategy, and acquisition of information in asymmetric animal conflicts. Anim Behav 29:221–240Google Scholar
  18. Rohwer S (1978) Passerine subadult plumages and the deceptive acquisition of resources: test of a critical assumption. Condor 80:173–179Google Scholar
  19. Rohwer S (1982) The evolution of reliable and unreliable badges of fighting ability. Am Zool 22:531–546Google Scholar
  20. Rohwer S, Ewald PW, Rohwer FC (1981) Variation in size, appearance, and dominance within and among the sex and age classes of Harris' sparrows. J Field Ornith 52:291–303Google Scholar
  21. Røskaft E, Rohwer S (1987) An experimental study of the function of the red epaulettes and the black body colour of male red-winged blackbirds.Anim Behav 35:1070–1077Google Scholar
  22. Searcy WA (1979a) Male characteristics and pairing success in red-winged blackbirds. Auk 96:353–363Google Scholar
  23. Searcy WA (1979b) Sexual selection and body size in male red-winged blackbirds. Evol 33:649–661Google Scholar

Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Scott Freeman
    • 1
  1. 1.Department of Zoology, NJ-15University of WashingtonSeattleUSA

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