Summary
Breeding males or females were removed from groups of the cooperatively breeding acorn woodpecker to study (1) competition among individuals from different groups to fill the breeding vancancies, (2) conflict between parents and offspring within groups over replacement of the removed bird, and (3) conflict between parents and offspring for breeding status. Intense fights (“power struggles”) among nonbreeders from other groups to fill the breeding vacancies developed after the removals. In groups containing only helpers of the opposite sex as the removed bird, replacement was rapid, but in groups containing helpers of the same sex as the removed bird replacement was delayed substantially. In these latter groups parent-offspring conflict developed: helpers could not breed because their parent of the opposite sex was present, and they attacked potential replacements, while their remaining parent advertised for a new mate by calling. Once replacement had occurred, dominance interactions between parents and offspring and among siblings appeared to prevent some individuals from breeding. We conclude that the potential for competition among close kin is high in cooperative species because breeding opportunities are limited.
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References
Alexander RD (1974) The evolution of social behavior. Annu Rev Ecol Syst 5:325–383
Brown JL (1978) Avian communal breeding systems. Annu Rev Ecol Syst 9:123–155
Emlen ST (1978) The evolution of cooperative breeding in birds. In: Krebs JR, Davies NB (eds) Behavioural ecology: An evolutionary approach. Sinauer, Sunderland, Mass, pp 245–281
Emlen ST (1982a) The evolution of helping. I. An ecological constraints model. Am Nat 119:29–39
Emlen ST (1982b) The evolution of helping. II. The role of behavioral conflict. Am Nat 119:40–53
Fry CH (1972) The social organization of bee-eaters (Meropidae) and cooperative breeding in hot climate birds. Ibis 114:1–14
Hamilton WD (1964) The genetical evolution of social behaviour. J Theor Biol 7:1–52
Hoogland JL, Sherman PW (1976) Advantages and disadvantages of bank swallow (Riparia riparia) coloniality. Ecol Monogr 46:33–58
Joste NE, Koenig WD, Mumme RL, Pitelka FA (1982) Intragroup dynamics of a cooperative breeder: an analysis of reproductive roles in the acorn woodpecker. Behav Ecol Sociobiol 11:195–201
Koenig WD (1978) Ecological and evolutionary aspects of cooperative breeding in acorn woodpeckers in central coastal California. PhD diss, University of California, Berkeley
Koenig WD (1981a) Space competition in the acorn woodpecker: power struggles in a cooperative breeder. Anim Behav 29:396–409
Koenig WD (1981b) Reproductive success, group size, and the evolution of cooperative breeding in the acorn woodpecker. Am Nat 117:421–443
Koenig WD,Pitelka FA (1979) Relatedness and inbreeding avoidance: counterploys in the communally nesting acorn woodpecker. Science 206:1103–1105
Koenig WD, Pitelka FA (1981) Ecological factors and kin selection in the evolution of cooperative breeding in birds. In: Alexander RD, Tinkle DW (eds) Natural selection and social behaviour: recent research and new theory, Chiron, New York, pp 261–280
Koenig WD, Mumme RL, Pitelka FA (1983) Female roles in cooperatively breeding acorn woodpeckers. In: Wasser SK (ed) Social behavior of female vertebrates. Academic Press, New York, pp 235–261
Koenig WD, Mumme RL, Pitelka FA (1984) The breeding system of the acorn woodpecker in central coastal California. Z Tierpsychol 65:289–308
Ligon JD, Ligon SH (1978) The communal social system of the green woodhoopoe in Kenya. Living Bird 17:159–197
MacRoberts MH, MacRoberts BR (1976) Social organization and behavior of the acorn woodpecker in central coastal California. Ornithol Monogr 21:1–115
Mumme RL, Koenig WD, Pitelka FA (1983a) Reproductive competition in the communal acorn woodpecker: sisters destroy each other's eggs. Nature 305:583–584
Summe RL, Koenig WD, Pitelka FA (1983b) Mate guarding in the acorn woodpecker: within-group reproductive competition in a cooperative breeder. Anim Behav 31:1094–1106
Noonan KM (1981) Individual strategies of inclusive-fitnessmaximizing in Polistes fuscatus foundresses. In: Alexander RD, Tinkle DW (eds) Natural selection and social behavior: Recent research and new theory. Chiron, New York, pp 18–44
Packer C, Pusey AE (1982) Cooperation and competition with-in coalitions of male lions: kin selection or game theory? Nature 296:740–742
Stacey PB (1979) Habitat saturation and communal breeding in the acorn woodpecker. Anim Behav 27:1153–1166
Stacey PB, Edwards TC (1983) Possible cases of infanticide by immigrant females in a group-breeding bird. Auk 100:731–733
Trail PW (1980) Ecological correlates of social organization in a communally breeding bird, the acorn woodpecker, Melanerpes formicivorus. Behav Ecol Sociobiol 7:83–92
Trivers RL (1974) Parent-offspring conflict. Am Zool 14:249–264
Woolfenden GE, Fitzpatrick JW (1977) Dominance in the Florida scrub jay. Condor 79:1–12
Zahavi A (1974) communal nesting by the Arabian babbler. Ibs 116:84–87
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Hannon, S.J., Mumme, R.L., Koenig, W.D. et al. Replacement of breeders and within-group conflict in the cooperatively breeding acorn woodpecker. Behav Ecol Sociobiol 17, 303–312 (1985). https://doi.org/10.1007/BF00293208
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DOI: https://doi.org/10.1007/BF00293208