Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum

Tidière, Morgane; Gaillard, Jean‐Michel; Garel, Mathieu; Lemaître, Jean‐François; Toïgo, Carole; Pélabon, Christophe

doi:10.1002/ece3.6181

Cited by 10 publications

(8 citation statements)

References 68 publications

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“…The level of mate monopolisation can be linked to various forms of sexual dimorphism, such as difference in body size, colouring, shape and size of weaponry (Andersson 1994). In bovids, body mass and horn size are targets of sexual selection (Bro‐Jørgensen 2007, Tidière et al 2020); horn size, however, may also depend on combat style, so horn dimorphism is less likely to be related to polygyny than body mass. Therefore, sexual dimorphism in the Caprinae was categorised primarily on the basis of body mass dimorphism, into four classes: ‘low’ (<10%), ‘medium‐low’ (10–30%), ‘medium‐high’ (30–50%) and ‘high’ (>50%).…”

Section: Methodsmentioning

confidence: 99%

Mountain ungulate mating systems: patterns and processes

Corlatti

Lovari

2023

Mammal Review

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1. Mountain ungulates of the subfamily Caprinae, including wild sheep, goats and goat-antelopes, show remarkable interspecific diversity in habitat preferences, social organisation and morphological features. We review how this diversity relates to their mating behaviour. 2. After introducing the ecology of mating systems and the evolution of the Caprinae, we investigate the pairwise, sequential relationships between habitat preferences, social behaviour, level of polygyny, and morphological features, and discuss the ecological processes underlying the patterns of mate monopolisation and acquisition. 3. From forest-dwelling, solitary, monogamous and monomorphic goat-antelopes, to highly dimorphic, polygynous and social wild sheep and goats inhabiting open landscapes, mountain ungulates reveal a close relationship between habitat openness and sexual dimorphism, through the level of sociality and that of mate monopolisation. 4. Although over the last few decades some information has been collected on the biology of Caprinae, our understanding of determinants of their mating systems is still hampered by limited data to estimate opportunities for sexual selection, as well as uncertainties over the occurrence and maintenance of alternative reproductive tactics, and lack of information on female mate choice. 5. The study of mating systems and that of the factors influencing them play a key role from an evolutionary and conservation standpoint. This is relevant to the Caprinae, whose main habitat is expected to be strongly affected by the ongoing climatic change, with potential effects on the phenology of their mating systems, and whose economic value is relevant for consumptive and nonconsumptive uses. A better understanding of the diversity and ecology of mating systems will require a wealth of additional field observations on male and female behaviour, as well as genetic assessments of reproductive success.

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Section: Methodsmentioning

confidence: 99%

Mountain ungulate mating systems: patterns and processes

Corlatti

Lovari

2023

Mammal Review

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“…Although analyzing allometric relationship between horn length and some skeletal measurement would provide less biased estimates of the allometric slope, data for skeletal measurements are not available for all studied species. More generally, these data are scarce for bovids (Tidière et al 2020) and they tend to be error prone (Martin et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Effects of population density on static allometry between horn length and body mass in mountain ungulates

Pélabon

Côté

Festa‐Bianchet

et al. 2021

Oikos

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Little is known about the effects of environmental variation on allometric relationships of condition‐dependent traits, especially in wild populations. We estimated sex‐specific static allometry between horn length and body mass in four populations of mountain ungulates that experienced periods of contrasting density over the course of the study. These species displayed contrasting sexual dimorphism in horn size; high dimorphism in Capra ibex and Ovis canadensis and low dimorphism in Rupicapra rupicapra and Oreamnos americanus. The effects of density on static allometric slopes were weak and inconsistent while allometric intercepts were generally lower at high density, especially in males from species with high sexual dimorphism in horn length. These results confirm that static allometric slopes are more canalized than allometric intercepts against environmental variation induced by changes in population density.

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“…A growing evidence suggests that SD can vary substantially among evolutionary lineages and populations within species (e.g. Sacchi et al, 2015; Tidière et al, 2020; Webb & Freckleton, 2007). Stage‐ and taxon‐specific sexually dimorphic traits (Badyaev, 2002) have also been documented, as well as Rensch's rule that considers the systematic pattern of sex differences in sexual size dimorphism (SSD) within and among species (Rensch, 1959).…”

Section: Introductionmentioning

confidence: 99%

Sexual size and shape dimorphism, and allometric scaling in the pupal and adult traits of Eristalis tenax

Ludoški

Francuski

Gojković

et al. 2023

Ecology and Evolution

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The patterns and amount of variation in size, shape, and/or life history traits between females and males are fundamentally important to gain the comprehensive understanding of the evolution of phenotypic diversity. In addition, the covariation of phenotypic traits can significantly contribute to morphological diversification and sexual dimorphism (SD). Using linear and geometric morphometrics, 237 Eristalis tenax specimens sampled from five populations were, therefore, comparatively assessed for the variation in sexual size dimorphism (SSD), sexual shape dimorphism (SShD), and life history traits, as well as for trait covariation (ontogenetic and static allometry). Pupal body, adult wing, and body mass traits were analyzed. Female-biased SSD was observed for pupal length, width, and centroid size, adult wing centroid size, mass, wing loading, and wing area. Conversely, pupal length/width ratio, developmental time, and mass were not found to be sexually dimorphic. Next, wing SShD, but not pupal body SShD was revealed, while allometry was found to be an important "determinant of SD" at the adult stage, with only a minor impact at the pupal stage. By comparing the patterns of covariance (based on allometric slope and intercept) between respective body mass and morphometric traits of pupae and adults, greater variation in allometric slopes was found in adult traits, while static allometries of the two stages significantly differed, as well. Finally, the results indicate that changes in the allometric intercept could be an important source of intraspecific variation and SD in drone fly adults.

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Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum

Cited by 10 publications

References 68 publications

Mountain ungulate mating systems: patterns and processes

Mountain ungulate mating systems: patterns and processes

Effects of population density on static allometry between horn length and body mass in mountain ungulates

Sexual size and shape dimorphism, and allometric scaling in the pupal and adult traits of Eristalis tenax

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