Abstract
White-fronted bee-eaters live in patrilocal, extended family groups in which several pairs may breed simultaneously and in which helping behavior by nonbreeders is common. The composition of a male's family, and his social position within it, are major predictors of his expected reproductive success. For females, the dispersing sex, a decision to pair necessitates forfeiting any potential fitness benefits available through helping in her family, in favor of the potential benefits of breeding in the male's family. Using a set of equations that incorporate the social and non-social predictors of nesting success, we develop a payoff matrix for the expected fitness (current and future) of pairing with different categories of males. Predictions generated from this payoff matrix were supported by data: (1) Females that could help close kin (and thus garner large indirect benefits) tended to remain unpaired. (2) Males with social characteristics associated with low expected reproductive success were more often rejected as potential mates by females. (3) “High-quality” males, those with potential helpers of their own, were nearly always paired. Simulation analyses were used to investigate female pairing decisions in more detail, and to test various hypotheses about possible decision rules. We demonstrate that pairing females incorporate an assessment of the family structure of potential partners into their mate choice decisions. Such social characters represent an aspect of female choice that has been underappreciated. We suggest that social characters will prove to be important components of mate choice decisions in many species where kinship and dominance considerations influence the likelihood, or success, of breeding.
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References
Bradbury JW, Andersson MB (1987) Sexual selection: testing the alternatives (Dahlem Life Sciences Workshop Report 39) Wiley, New York
Brown JL (1987) Helping and communal breeding in birds. Princeton University Press, Princeton
Emlen ST (1990) The white-fronted bee-eater: helping in a colonially nesting species. In: Stacey PB, Koenig WD (eds) Cooperative breeding in birds: long-term studies of ecology and behavior. Cambridge University Press, Cambridge, pp 305–339
Emlen ST (1991) Evolution of cooperative breeding in birds and mammals. In: Krebs JR, Davies NB (eds) Behavioural ecology: an evolutionary approach. Blackwell, Oxford, pp 301–337
Emlen ST, Wrege PH (1988) The role of kinship in helping decisions among white-fronted bee-eaters. Behav Ecol Sociobiol 23:305–315
Emlen ST, Wrege PH (1989) A test of alternate hypotheses for helping behavior in white-fronted bee-eaters of Kenya. Behav Ecol Sociobiol 25:303–319
Emlen ST, Wrege PH (1991) Breeding biology of white-fronted bee-eaters at Nakuru: the influence of helpers on breeder fitness. J Anim Ecol 60:309–326
Emlen ST, Wrege PH (1992) Parent-offspring conflict and the recruitment of helpers among bee-eaters. Nature 356:331–333
Emlen ST, Wrege PH (1994) Gender, status and family fortunes in the white-fronted bee-eater. Nature 367:129–132
Halliday TR (1978) Sexual selection and mate choice. In: Krebs JR, Davies NB (eds) Behavioural ecology: an evolutionary approach. Blackwell, Oxford, pp 180–213
Hamilton WD, Zuk M (1982) Heritable true fitness and bright birds: a role for parasites? Science 218:384–387
Harcourt AH (1987) Dominance and fertility among female primates. J Zool 213:471–488
Harrington FH, Paquet PC, Ryon J, Fentress JC (1982) Monogamy in wolves: a review of the evidence. In: Harrington FH, Paquet PC (eds) Wolves of the world: perspectives of behavior, ecology, and conservation. Noyes, Park Ridge, New Jersey, pp 209–222
Holekamp KE, Smale L (1991) Dominance acquisition during mammalian social development: the “inheritance” of maternal rank. Am Zool 31:306–317
Kirkpatrick M, Ryan MJ (1991) The evolution of mating preferences and the paradox of the lek. Nature 350:33–38
Macdonald DW, Moehlman PD (1982) Cooperation, altruism, and restraint in the reproduction of carnivores. In: Klopfer P, Bateson P (eds) Perspectives in ethology vol. 5. Plenum, New York, pp 433–466
Malcolm JR, Marten K (1982) Natural selection and the communal rearing of pups in African wild dogs (Lycaon pictus). Behav Ecol Sociobiol 10:1–13
Rood JP (1983) The social system of the dwarf mongoose. In: Eisenberg JF, Kleiman DG (eds) Recent advances in the study of mammalian behavior. American Society of Mammologists, Shippensburg, Pennsylvania, pp 454–488
Rood JP (1990) Group size, survival, reproduction, and routes to breeding in dwarf mongooses. Anim Behav 39:566–572
Smuts B, Nocolson N (1989) Reproduction in wild female olive baboons. Am J Primatol 19:229–246
Snowdon CT, Ziegler TE, Widowski TM (1993) Further hormonal suppression of eldest daughter cotton-top tamarins following birth of infants. Am J Primat 31:11–21
Stacey PB, Koenig WD (eds) (1990) Cooperative breeding in birds: long-term studies of ecology and behavior. Cambridge University Press, Cambridge
Walters JR, Seyfarth RM (1987) Conflict and cooperation. In: Smuts BB, Cheney DL, Seyfarth RM, Wrangham RW, Struhsaker TT (eds) Primate societies. University of Chicago Press, Chicago, pp 306–317
Wrege PH, Emlen ST (1991) Breeding seasonality and reproductive success of white-fronted bee-eaters in Kenya. Auk 108:673–687
Zack S, Rabenold KN (1989) Assessment, age and proximity in dispersal contests among cooperative wrens: field experiments. Anim Behav 38:235–247
Zahavi A (1975) Mate selection — a selection for a handicap. J Theor Biol 53:205–214
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Wrege, P.H., Emlen, S.T. Family structure influences mate choice in white-fronted bee-eaters. Behav Ecol Sociobiol 35, 185–191 (1994). https://doi.org/10.1007/BF00167958
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DOI: https://doi.org/10.1007/BF00167958