Age-related dominance in male dark-eyed juncos: effects of plumage and prior residence

Holberton, Rebecca L.; Hanano, Ralph; Able, Kenneth P.

doi:10.1016/s0003-3472(05)80538-x

Cited by 65 publications

(27 citation statements)

References 22 publications

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“…In addition, residency status often confers an advantage in contests over intruders of similar RHP, because the territory owner (the resident male) has an accurate knowledge of the territory value, whereas the intruding male has no information on the RV. Thus, in territorial contests, resident individuals may win because, having a great familiarity with the physical and social environment, they are more motivated to escalate the combat than intruders [Holberton et al, 1990;Kemp and Wiklund, 2004;Moretz, 2003;Stamps and Krishnan, 1994;Stuart-Fox and Johnston, 2005;Temeles, 1994]. Finally, prior fighting experience could influence the outcome of subsequent agonistic interactions by altering the estimated fighting ability of an individual, i.e.…”

Section: Introductionmentioning

confidence: 99%

Male–male combats in a polymorphic lizard: residency and size, but not color, affect fighting rules and contest outcome

Sacchi

Pupin

Gentilli

et al. 2009

Aggressive Behavior

107

106

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Theoretical models predict that the outcome of dyadic agonistic encounters between males is influenced by resource-holding potential, resource value, and intrinsic aggressiveness of contestants. Moreover, in territorial disputes residents enjoy a further obvious competitive advantage from the residency itself, owing to the intimate familiarity with their territory. Costs of physical combats are, however, dramatically high in many instances. Thus, signals reliably reflecting fighting ability of the opponents could easily evolve in order to reduce these costs. For example, variation in color morph in polymorphic species has been associated with dominance in several case studies. In this study, we staged asymmetric resident-intruder encounters in males of the common wall lizard Podarcis muralis, a species showing three discrete morphs (white, yellow, and red) to investigate the effects of asymmetries in color morph, residency, and size between contestants on the outcome of territorial contests. We collected aggression data by presenting each resident male with three intruders of different color morph, in three consecutive tests conducted in different days, and videotaping their interactions. The results showed that simple rules such as residency and body size differences could determine the outcome of agonistic interactions: residents were more aggressive than intruders, and larger males were competitively superior to smaller males. However, we did not find any effect of color on male aggression or fighting success, suggesting that color polymorphism in this species is not a signal of status or fighting ability in intermale conflicts.

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Section: Introductionmentioning

confidence: 99%

Male–male combats in a polymorphic lizard: residency and size, but not color, affect fighting rules and contest outcome

Sacchi

Pupin

Gentilli

et al. 2009

Aggressive Behavior

107

106

View full text Add to dashboard Cite

show abstract

“…Møller 1994Møller , 2001Marra et al 1998). Such individuals need to be in good condition to maintain control of their territories until females arrive, but early arrival typically confers many advantages, including the acquisition of preferred territories and prior resident advantage in subsequent territorial contests (Maynard Smith and Parker 1976;Davies 1978;Riechert 1979;Holberton et al 1990;Haley 1994;Cutts et al 1999).…”

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confidence: 99%

Exploring the Relationship Between Parental Relatedness and Male Reproductive Success in the Antarctic Fur Seal Arctocephalus Gazella

2004

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Abstract. Recent genetic studies of natural populations have shown that heterozygosity and other genetic estimates of parental relatedness correlate with a wide variety of fitness traits, from juvenile survival and parasite resistance to male reproductive success. Many of these traits involve health and survival, where the underlying mechanism may involve changes in the effectiveness of the immune system. However, for traits such as reproductive success, the likely mechanisms remain less obvious. In this paper, we examine the relationship between heterozygosity and a range of traits that contribute to male reproductive success, including time spent on territories and competitiveness. Our analysis is based on observational and genetic data from eight consecutive breeding seasons at a colony of the Antarctic fur seal, Arctocephalus gazella. Overall, male reproductive success was found to correlate strongly with internal relatedness (IR, a form of heterozygosity). When different components of success were analyzed, we found that IR correlates independently with reproductive longevity, time spent ashore, and competitive ability per unit mating opportunity on the study beach, with more heterozygous males being more successful. Behavioral observations were sufficiently detailed to allow examination of how daily mean IR values for males present on the beach varied within seasons and from year to year. Again, significant variation was found both among and within seasons, with more homozygous males appearing less able to hold territories in poor seasons when pup production is low and, within a season, at both the start of the season and to some extent around the peak of female estrus. Finally, we tested whether the benefits of high heterozygosity are due mainly to a genomewide effect (e.g. inbreeding depression) or to single locus heterosis by asking whether the relationship between IR and male success was robust to the removal of any single locus or to any pair of loci. Since the relationship remained significant in all cases, we favor a multilocus explanation for the effects we report.

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“…Prior residency is generally the main determinant of the outcome of aggressive interactions during territorial intrusions (Davies, 1978;Krebs, 1982) often overruling indicators of fighting ability, such as for example colour badges of status (Holberton et al, 1990) or body size (Chellappa et al, 1999;Turner, 1994). This could be another explanation why we found no effect of either residents own crown colour, body mass or age on their aggressive responses.…”

Section: Discussionmentioning

confidence: 55%

Is UV signalling involved in male-male territorial conflict in the blue tit (Cyanistes caeruleus)? A new experimental approach

Korsten¹,

Dijkstra

Komdeur³

2007

Behav

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SummaryStructurally-based ultraviolet (UV) coloration of plumage can signal male quality and plays a role in female mate choice in many bird species. UV-reflecting badges could also be important signals in male-male competition. We tested if territorial blue tit (Cyanistes caeruleus) males discriminate between conspecific male intruders which differ in the UV reflectance of their crown feathers. To this aim, we used a new experimental approach in which we simultaneously (instead of sequentially) introduced two male blue tit taxidermic mounts in the territories of resident males during the female fertile period; one mount with natural crown UV reflectance and one mount with reduced crown UV. The two mounts provoked strong aggressive reactions from resident males. Males specifically directed their aggression to conspecific intruders, as a male blue tit mount received substantially more aggression than a mount of a European robin (Erithacus rubecula). However, aggression of resident males did not vary between the UV-reduced and the control mount. Furthermore, the variation in natural crown UV reflectance of the resident males did not predict the intensity of their aggressive response. Contrary to previous findings our results suggest that UV signals play only a limited role in male-male interactions during territorial intrusions in the female fertile period.

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Age-related dominance in male dark-eyed juncos: effects of plumage and prior residence

Cited by 65 publications

References 22 publications

Male–male combats in a polymorphic lizard: residency and size, but not color, affect fighting rules and contest outcome

Male–male combats in a polymorphic lizard: residency and size, but not color, affect fighting rules and contest outcome

Exploring the Relationship Between Parental Relatedness and Male Reproductive Success in the Antarctic Fur Seal Arctocephalus Gazella

Is UV signalling involved in male-male territorial conflict in the blue tit (Cyanistes caeruleus)? A new experimental approach

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