Mating tactics of male rock ptarmigan, Lagopus mutus: a conditional mating strategy

Brodsky, Lynn M.

doi:10.1016/s0003-3472(88)80003-4

Cited by 34 publications

(23 citation statements)

References 34 publications

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“…This assumption is further supported by the timing of the intrusions, which occurred mainly in the breeding season and often during the fertilization period (sensu Birkhead 1988) of the subject female (Rowley, unpublished observations). A recent study of rock ptarmigan Lagopus taurus described similar mating tactics involving frequent male philandering (Brodsky 1988). …”

Section: Discussionmentioning

confidence: 90%

Promiscuity: an inbreeding avoidance mechanism in a socially monogamous species?

Brooked

Rowley

Adams

et al. 1990

Behav Ecol Sociobiol

163

173

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Paternity likelihood was tested in a population of splendid fairy-wrens Malurus splendens by allozyme electrophoresis. A total of 91 offspring of 24 dams and 37 putative sires were typed at 10 polymorphic loci. All young were compatible with their dams but at least 65% were not fathered by any of the males in their group. A long-term study of this wren population has shown that the males are sedentary, show little evidence of dispersal and help care for the nestlings and fledglings in their group. Had the senior male sired all the offspring in his group, there would have been a high incidence of close inbreeding. The promiscuous mating system demonstrated here would reduce the level of inbreeding in the population but still allow individuals the security of group-living in a stable year-round territory.

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Section: Discussionmentioning

confidence: 90%

Promiscuity: an inbreeding avoidance mechanism in a socially monogamous species?

Brooked

Rowley

Adams

et al. 1990

Behav Ecol Sociobiol

163

173

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“…Apart from the energetic de¢cit incurred through mate guarding, mate guarding in many socially monogamous species is both time consuming and largely incompatible with pursuing extra-pair copulations (Carlson et al 1985;MÖller 1985;Alatalo et al 1987;Brodsky 1988;Hasselquist & Bensch 1991;Van Rhijn 1991, but see Birkhead & MÖller 1992. When the egg-laying period of the pair female ends, the male is released from these constraints and can devote more time to pursuing extra-pair copulations.…”

Section: Discussionmentioning

confidence: 99%

Mate guarding in the Seychelles warbler is energetically costly and adjusted to paternity risk

Komdeur

2001

Proc. R. Soc. Lond. B

134

100

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Males may increase their ¢tness through extra-pair copulations (copulations outside the pair bond) that result in extra-pair fertilizations, but also risk lost paternity when they leave their own mate unguarded. The ¢tness costs of cuckoldry for Seychelles warblers (Acrocephalus sechellensis) are considerable because warblers have a single-egg clutch and, given the short breeding season, no time for a successful replacement clutch. Neighbouring males are the primary threat to a male's genetic paternity. Males minimize their loss of paternity by guarding their mates to prevent them from having extra-pair copulations during their fertile period. Here, I provide experimental evidence that mate-guarding behaviour is energetically costly and that the expression of this trade-o¡ is adjusted to paternity risk (local male density). Freeliving males that were induced to reduce mate guarding spent signi¢cantly more time foraging and gained signi¢cantly better body condition than control males. The larger the reduction in mate guarding, the more pronounced was the increase in foraging and body condition (accounting for food availability). An experimental increase in paternity risk resulted in an increase in mate-guarding intensity and a decrease in foraging and body condition, and vice versa. This is examined using both cross-sectional and longitudinal data. This study on the Seychelles warbler o¡ers experimental evidence that mate guarding is energetically costly and adjusted to paternity risk.

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“…These two different behavioural strategies (guarding versus advertising) were reflected in the data on timing of EPCs. The experimental males that belonged to the "attractive group" were able to secure fertilisations with other females during their own females' fertile period, whereas the males in the "unattractive group" probably faced a trade-off between guarding and EPCs (Brodsky 1988;Hasselquist and Bensch 1991) and were predominantly able to gain fertilisations with other females outside of their own mates' fertile period.…”

Section: Does Synchrony Constrain Male Epc Behaviour?mentioning

confidence: 99%

Ecological constraints on extra-pair paternity in the bluethroat

Johnsen

Lifjeld

2003

Oecologia

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The mating system of the bluethroat (Luscinia s. svecica) involves a high level of sperm competition, and consequently a high frequency of extra-pair paternity (EPP). There is considerable variation in the frequency of EPP. Over the course of ten study years in a population in Norway, the frequency has fluctuated between 7% and 33% of young, and 8% and 76% of broods. In this paper, we address the issue of whether ecological factors can explain some of the variation in EPP between years and broods. Factors include breeding density, breeding synchrony and two meteorological variables (ambient temperature and precipitation) during the period of peak female fertility. There were no significant relationships between annual averages of the four variables and the annual level of EPP, but the statistical power of these tests was low, due to a restricted sample (n=10 years). Focussing on individual broods, none of the factors had significant effects when including all broods in the analyses (including those with zero EPP). When limiting the analyses to broods with one or more extra-pair offspring, morning temperature had a significant effect on the frequency of EPP. When the temperature was low during the peak of the fertile period, EPP occurred less frequently. Male extra-pair behaviour was not generally constrained by synchrony between the fertile periods of the social mate and the extra-pair mate, but for a subgroup of males ("unattractive males") there appeared to be a trade-off between mate guarding and pursuing extra-pair copulations. Our results indicate that ecological conditions have no influence on whether or not a brood will contain extra-pair offspring, but when EPP does occur, its frequency is influenced by air temperature. Possibly, there is a causal relationship between weather conditions and the frequency of extra-pair encounters in this species. The breeding season is initiated at a phenologically early stage, when large parts of the territories are still covered with snow, and cold weather conditions may force the birds to devote most of their time to maintenance and thereby constrain sexual activities.

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Mating tactics of male rock ptarmigan, Lagopus mutus: a conditional mating strategy

Cited by 34 publications

References 34 publications

Promiscuity: an inbreeding avoidance mechanism in a socially monogamous species?

Promiscuity: an inbreeding avoidance mechanism in a socially monogamous species?

Mate guarding in the Seychelles warbler is energetically costly and adjusted to paternity risk

Ecological constraints on extra-pair paternity in the bluethroat

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