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Behavioral Ecology and Sociobiology

, Volume 16, Issue 3, pp 203–207 | Cite as

Breeding territory quality and agonistic behavior: effects of energy availability and intruder pressure in hummingbirds

  • Staffan Tamm
Article

Summary

The relative importance of food a vailability and intruder pressure on breeding territorial behavior was studied in two experiments with male calliope hummingbirds. In the first experiment, extra food was provided in inconspicuous feeders. Territory owners who fed from the feeders increased their display rates (power-diving and hovering) when on their territories, and spent less time out of sight (mostly off their territories). Food addition by this method had no significant effect on intruder pressure, as measured by number and duration of chases. In the second experiment, intruder pressure was increased by attracting feedertrained males to feeders in territories of individuals who did not feed from feeders. In this experiment, display activity of residents did not change but chasing activity increased. These results suggest that display rates by male calliope hummingbirds depend at least in part on the amount of food available, but are not strongly affected by the number of feeding attempts by male intruders. No attempt was made to determine whether displays can deter competitors, attract mates, or do both. However, since these energetically expensive displays depend at least in part on the energy available to owners, they provide readily available indices of male and/or territory quality which could potentially be used for different purposes by different individuals.

Keywords

Food Addition Agonistic Behavior Energy Availability Territorial Behavior Territory Quality 
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. Bent AC (1940) Life histories of North American cuckoos, goatsuckers, hummingbirds and their allies. US Natl Mus Bull 176:1–506Google Scholar
  2. Calder WA (1971) Temperature relationships and nesting of the calliope hummingbird. Condor 73:314–321Google Scholar
  3. Ewald PW, Carpenter FL (1978) Territorial responses to energy manipulations in the Anna hummingbird. Oecologia (Berl) 31:277–292Google Scholar
  4. Ewald PW, Orians GH (1983) Effects of resource depression on use of inexpensive and escalated aggressive behavior: experimental tests using Anna hummingbirds. Behav Ecol Sociobiol 12:95–101Google Scholar
  5. Ewald PW, Rohwer S (1980) Age, coloration and dominance in nonbreeding hummingbirds: a test of the asymmetry hypothesis. Behav Ecol Sociobiol 7:273–279Google Scholar
  6. Ewald PW, Hunt GL Jr, Warner M (1980) Territory size in Western gulls: importance of intrusion pressure, defence investments, and vegetation structure. Ecology 61:80–87Google Scholar
  7. Gass CL (1978) Rufous hummingbird feeding territoriality in a suboptimal habitat. Can J Zool 56:1535–1539Google Scholar
  8. Gass CL, Montgomerie RD (1981) Hummingbird foraging behavior: decision-making and energy regulation. In: Kamil AC, Sargent TD (eds) Foraging behavior: ecological, ethological, and psychological approaches. Garland, New York, pp 159–194Google Scholar
  9. Miller SJ, Inouye DW (1983) Roles of the wing whistle in the territorial behaviour of male broad-tailed hummingbirds (Selasphorus platycercus). Anim Behav 31:689–700Google Scholar
  10. Myers JP, Connors PG, Pitelka FA (1979) Territory size in wintering sanderlings: the effects of prey abundance and intruder density. Auk 96:551–561Google Scholar
  11. Myers JP, Connors PG, Pitelka FA (1981) Optimal territory size and the sanderling: compromises in a variable environment. In: Kamil AC, Sargent TD (eds) Foraging behavior: ecological, ethological, and psychological approaches. Garland, New York, pp 135–158Google Scholar
  12. Norton ME, Arcese P, Ewald PW (1982) Effects of intrusion pressure on territory size in black-chinned hummingbirds (Archllochus alexandri). Auk 99:761–764Google Scholar
  13. Pitelka FA (1942) Territoriality and related problems in North American hummingbirds. Condor 44:189–204Google Scholar
  14. Searcy WA (1979) Sexual selection and body size in male redwinged blackbirds. Evolution 33:649–661Google Scholar
  15. Snow BK (1973) Social organization of the hairy hermit Glaucis hirsuta. Ardea 61:94–105Google Scholar
  16. Stiles FG (1973) Food supply and the annual cycle of the Anna hummingbird. Univ Calif Publ Zool 97:1–109Google Scholar
  17. Stiles FG (1982) Aggressive and courtship displays of the male Annas hummingbird. Condor 84:208–225Google Scholar
  18. Stiles FG, Wolf LL (1979) Ecology and evolution of lek mating behavior in the long-tailed hermit hummingbird. AOU Ornitol Monogr 27Google Scholar
  19. Wilhelm K, Comtesse H, Pflumm W (1982) Einfluss der Konzentration der Zuckerlösung auf den Gesang und das Balzverhalten des Gelbbauchnektarvogels (Nectarinia venusta). Z Tierpsychol 60:27–40Google Scholar
  20. Wolf LL (1975) “Prostitution” behavior in a tropical hummingbird. Condor 77:140–144Google Scholar
  21. Wolf LL, Stiles FG (1970) Evolution of pair cooperation in a tropical hummingbird. Evolution 24:759–773Google Scholar
  22. Woods RS (1924) Some birds of the San Gabriel Wash. Bird-Lore 26:1–9Google Scholar
  23. Woods RS (1927) The hummingbirds of California. Auk 44:297–318Google Scholar
  24. Ydenberg RC (1984) The conflict between feeding and territorial defence in the great tit. Behav Ecol Sociobiol 15:103–108Google Scholar

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Staffan Tamm
    • 1
  1. 1.Institute of Animal Resource Ecology and Department of ZoologyUniversity of British ColumbiaVancouverCanada

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