Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum
Abstract Allometric relationships describe the proportional covariation between morphological, physiological, or life‐history traits and the size of the organisms. Evolutionary allometries estimated among species are expected to result from species differences in ontogenetic allometry, but it remain...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wiley
2020-05-01
|
Series: | Ecology and Evolution |
Subjects: | |
Online Access: | https://doi.org/10.1002/ece3.6181 |
id |
doaj-948f503a52c44fa8805b71a45adc496c |
---|---|
record_format |
Article |
spelling |
doaj-948f503a52c44fa8805b71a45adc496c2021-04-02T13:04:44ZengWileyEcology and Evolution2045-77582020-05-011094104411410.1002/ece3.6181Variation in the ontogenetic allometry of horn length in bovids along a body mass continuumMorgane Tidière0Jean‐Michel Gaillard1Mathieu Garel2Jean‐François Lemaître3Carole Toïgo4Christophe Pélabon5Department of Biology Centre for Biodiversity Dynamics NTNUNorwegian University of Science and Technology Trondheim NorwayLaboratoire de Biométrie et Biologie Evolutive - UMR5558 - CNRS Université Claude Bernard Lyon 1 Université de Lyon Villeurbanne FranceOffice Français pour la Biodiversité Gières FranceLaboratoire de Biométrie et Biologie Evolutive - UMR5558 - CNRS Université Claude Bernard Lyon 1 Université de Lyon Villeurbanne FranceOffice Français pour la Biodiversité Gières FranceDepartment of Biology Centre for Biodiversity Dynamics NTNUNorwegian University of Science and Technology Trondheim NorwayAbstract Allometric relationships describe the proportional covariation between morphological, physiological, or life‐history traits and the size of the organisms. Evolutionary allometries estimated among species are expected to result from species differences in ontogenetic allometry, but it remains uncertain whether ontogenetic allometric parameters and particularly the ontogenetic slope can evolve. In bovids, the nonlinear evolutionary allometry between horn length and body mass in males suggests systematic changes in ontogenetic allometry with increasing species body mass. To test this hypothesis, we estimated ontogenetic allometry between horn length and body mass in males and females of 19 bovid species ranging from ca. 5 to 700 kg. Ontogenetic allometry changed systematically with species body mass from steep ontogenetic allometries over a short period of horn growth in small species to shallow allometry with the growth period of horns matching the period of body mass increase in the largest species. Intermediate species displayed steep allometry over long period of horn growth. Females tended to display shallower ontogenetic allometry with longer horn growth compared to males, but these differences were weak and highly variable. These findings show that ontogenetic allometric slope evolved across species possibly as a response to size‐related changes in the selection pressures acting on horn length and body mass.https://doi.org/10.1002/ece3.6181comparative analysisdevelopmentornamentsexual selectionungulatesweapons |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Morgane Tidière Jean‐Michel Gaillard Mathieu Garel Jean‐François Lemaître Carole Toïgo Christophe Pélabon |
spellingShingle |
Morgane Tidière Jean‐Michel Gaillard Mathieu Garel Jean‐François Lemaître Carole Toïgo Christophe Pélabon Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum Ecology and Evolution comparative analysis development ornament sexual selection ungulates weapons |
author_facet |
Morgane Tidière Jean‐Michel Gaillard Mathieu Garel Jean‐François Lemaître Carole Toïgo Christophe Pélabon |
author_sort |
Morgane Tidière |
title |
Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum |
title_short |
Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum |
title_full |
Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum |
title_fullStr |
Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum |
title_full_unstemmed |
Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum |
title_sort |
variation in the ontogenetic allometry of horn length in bovids along a body mass continuum |
publisher |
Wiley |
series |
Ecology and Evolution |
issn |
2045-7758 |
publishDate |
2020-05-01 |
description |
Abstract Allometric relationships describe the proportional covariation between morphological, physiological, or life‐history traits and the size of the organisms. Evolutionary allometries estimated among species are expected to result from species differences in ontogenetic allometry, but it remains uncertain whether ontogenetic allometric parameters and particularly the ontogenetic slope can evolve. In bovids, the nonlinear evolutionary allometry between horn length and body mass in males suggests systematic changes in ontogenetic allometry with increasing species body mass. To test this hypothesis, we estimated ontogenetic allometry between horn length and body mass in males and females of 19 bovid species ranging from ca. 5 to 700 kg. Ontogenetic allometry changed systematically with species body mass from steep ontogenetic allometries over a short period of horn growth in small species to shallow allometry with the growth period of horns matching the period of body mass increase in the largest species. Intermediate species displayed steep allometry over long period of horn growth. Females tended to display shallower ontogenetic allometry with longer horn growth compared to males, but these differences were weak and highly variable. These findings show that ontogenetic allometric slope evolved across species possibly as a response to size‐related changes in the selection pressures acting on horn length and body mass. |
topic |
comparative analysis development ornament sexual selection ungulates weapons |
url |
https://doi.org/10.1002/ece3.6181 |
work_keys_str_mv |
AT morganetidiere variationintheontogeneticallometryofhornlengthinbovidsalongabodymasscontinuum AT jeanmichelgaillard variationintheontogeneticallometryofhornlengthinbovidsalongabodymasscontinuum AT mathieugarel variationintheontogeneticallometryofhornlengthinbovidsalongabodymasscontinuum AT jeanfrancoislemaitre variationintheontogeneticallometryofhornlengthinbovidsalongabodymasscontinuum AT caroletoigo variationintheontogeneticallometryofhornlengthinbovidsalongabodymasscontinuum AT christophepelabon variationintheontogeneticallometryofhornlengthinbovidsalongabodymasscontinuum |
_version_ |
1721566624057655296 |