Correlates of male mating success in the ruff Philomachus pugnax, a lekking shorebird

Hill, Wendy L.

doi:10.1007/bf00165962

Cited by 51 publications

(48 citation statements)

References 26 publications

(24 reference statements)

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“…In agreement with several other studies , HÖGLUND & LUNDBERG 1988, ANDERSSON 1989, APOLLONIO et al 1989, HILL 1991 we found a strong effect of lek-attendance on copulatory success. In our model lek attendance is an exogenous variable since there is no significant residual correlation between e A and any other error term; this means that lek attendance is completely determined outside the system studied here (e.g.…”

Section: Estimate Of Model's Parameterssupporting

confidence: 94%

A structural-equations model for the mating behaviour of bucks in a lek of fallow deer

Focardi

Tinelli²

1996

Ethology Ecology & Evolution

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In many studies, the causal factors of male copulatory success in leks cannot be experimentally analysed under natural conditions. Information is based on the analysis of correlation and on multiple regression models. However, these methods are often flawed or unsuitable for conclusive results. By contrast, an explicit model of the breeding behaviour of male fallow deer (Dama dama L.) has been formulated using structural (regression) equations. The model describes with outstanding precision the network of short-term determinants of male copulatory success. Harem size is identified as the most important indirect cause of male copulatory success and, in its turn, it is a function of (i) lek attendance, (ii) intensity of herding, (iii) aggressive behaviour towards other bucks and (iv) courtship. Comparing the results of the structural-equations model with those of a partial correlation analysis and of a multiple regression study, we conclude that the statistical method presented here better describes the complexity of the causal web which characterizes leks than other statistical methods commonly used in these studies.

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Section: Estimate Of Model's Parameterssupporting

confidence: 94%

A structural-equations model for the mating behaviour of bucks in a lek of fallow deer

Focardi

Tinelli²

1996

Ethology Ecology & Evolution

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“…Correcting for body size, non-territorial independents are heavier and fatter than territorial independents and satellites. These patterns suggests that stored body reserves early in the season facilitate maintaining territory ownership, which in turn is positively correlated with reproductive success among independents (Lank and Smith, 1987;Hill, 1991;Widemo, 1997). Hence, mass relative to size is important to fitness, at least for independents.…”

Section: Study Animalmentioning

confidence: 87%

Immunocompetence and testosterone-induced condition traits in male ruffs (Philomachus pugnax)

Lozano¹,

Lank²

2004

Animal Biol

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The immune system is costly to operate, so we expect allocation to this function to relate to other indices of overall phenotypic condition. In captive male ruffs (Philomachus pugnax), we examine covariation between three seasonal male characteristics induced by testosterone (neck 'ruff', facial wattles, and increases in mass/size) and cell-mediated and humoral immunity. The ruff has two genetically distinct morphs of males, 'independents' and 'satellites', which differ in mating behaviour, somewhat in body size, and possibly life history strategy. Ruff length and wattle number were significantly correlated with each other and with body size, but unrelated to mass/size. Humoral immunity was weakly correlated with size, but not with secondary male traits, or with cell-mediated immunity. We did not detect differences in humoral immunity between morphs. Cell-mediated immunity was weakly correlated with ruff length, but not with wattle number, size, or mass/size. Cellmediated immunity decreased significantly with age. Controlling for age, independents had higher cell-mediated immunity responses than satellites. The expected relationships between two measures of immune function and other measures of condition were not always present, which suggests we need more data and/or more specific predictions about how the different aspects of immune function relate to each other and to ecological variables.

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“…In lekking species, females are generally thought to function as observers, often watching several displaying males simultaneously (e.g., Greater Sage-Grouse [Centrocercus urophasianus; Gibson 1996], Ruff [Philomachus pugnax; Hill 1991], and Black Grouse [Tetrao tetrix; Rintamaki 2000]); a participatory role in the courtship display itself is rarely considered. In contrast, studies of some species indicate that signals from the female alter male courtship.…”

Section: Discussionmentioning

confidence: 99%

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2015

The Auk

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Correlates of male mating success in the ruff Philomachus pugnax, a lekking shorebird

Cited by 51 publications

References 26 publications

A structural-equations model for the mating behaviour of bucks in a lek of fallow deer

A structural-equations model for the mating behaviour of bucks in a lek of fallow deer

Immunocompetence and testosterone-induced condition traits in male ruffs (Philomachus pugnax)

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