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Renaud S, Amar L, Chevret P, Romestaing C, Quéré JP, Régis C, Lebrun R. Inner ear morphology in wild versus laboratory house mice. J Anat 2024; 244:722-738. [PMID: 38214368 PMCID: PMC11021637 DOI: 10.1111/joa.13998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 12/08/2023] [Accepted: 12/08/2023] [Indexed: 01/13/2024] Open
Abstract
The semicircular canals of the inner ear are involved in balance and velocity control. Being crucial to ensure efficient mobility, their morphology exhibits an evolutionary conservatism attributed to stabilizing selection. Release of selection in slow-moving animals has been argued to lead to morphological divergence and increased inter-individual variation. In its natural habitat, the house mouse Mus musculus moves in a tridimensional space where efficient balance is required. In contrast, laboratory mice in standard cages are severely restricted in their ability to move, which possibly reduces selection on the inner ear morphology. This effect was tested by comparing four groups of mice: several populations of wild mice trapped in commensal habitats in France; their second-generation laboratory offspring, to assess plastic effects related to breeding conditions; a standard laboratory strain (Swiss) that evolved for many generations in a regime of mobility reduction; and hybrids between wild offspring and Swiss mice. The morphology of the semicircular canals was quantified using a set of 3D landmarks and semi-landmarks analyzed using geometric morphometric protocols. Levels of inter-population, inter-individual (disparity) and intra-individual (asymmetry) variation were compared. All wild mice shared a similar inner ear morphology, in contrast to the important divergence of the Swiss strain. The release of selection in the laboratory strain obviously allowed for an important and rapid drift in the otherwise conserved structure. Shared traits between the inner ear of the lab strain and domestic pigs suggested a common response to mobility reduction in captivity. The lab-bred offspring of wild mice also differed from their wild relatives, suggesting plastic response related to maternal locomotory behavior, since inner ear morphology matures before birth in mammals. The signature observed in lab-bred wild mice and the lab strain was however not congruent, suggesting that plasticity did not participate to the divergence of the laboratory strain. However, contrary to the expectation, wild mice displayed slightly higher levels of inter-individual variation than laboratory mice, possibly due to the higher levels of genetic variance within and among wild populations compared to the lab strain. Differences in fluctuating asymmetry levels were detected, with the laboratory strain occasionally displaying higher asymmetry scores than its wild relatives. This suggests that there may indeed be a release of selection and/or a decrease in developmental stability in the laboratory strain.
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Affiliation(s)
- Sabrina Renaud
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Léa Amar
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Pascale Chevret
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Caroline Romestaing
- Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), UMR 5023, CNRS, ENTPE, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Jean-Pierre Quéré
- Centre de Biologie et Gestion des Populations (INRA/IRD/Cirad/Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez Cedex, France
| | - Corinne Régis
- Laboratoire de Biométrie et Biologie Evolutive (LBBE), UMR 5558, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, France
| | - Renaud Lebrun
- Institut des Sciences de l'Évolution (ISE-M), UMR 5554, CNRS/UM/IRD/EPHE, Université de Montpellier, Montpellier, France
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2
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Ming KM, Le Verger K, Geiger M, Schmelzle T, Georgalis GL, Shimbo G, Sasaki M, Ohdachi SD, Sánchez-Villagra MR. Insular dwarfism in horses from the Aegean Sea and the Japanese archipelago. Mamm Biol 2024; 104:345-361. [PMID: 39070961 PMCID: PMC11281976 DOI: 10.1007/s42991-024-00408-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 02/22/2024] [Indexed: 07/30/2024]
Abstract
The horse (Equus caballus) varieties from Skyros and Rhodes islands (Greece) in the Aegean archipelago are extremely small, reaching shoulder heights of only about 1 m. Furthermore, the Japanese archipelago is home to eight small, native horse breeds. We investigated the evolutionary morphology and provided a review of historical documentations of these horses of cultural interest in Greece and Japan, thus providing a comparison of the independent evolution of small size in islands. We integrate cranial data from historical literature with data from newly gathered and curated skulls and analyse a measurement dataset featuring various domestic and mainland horse breeds and varieties. We use non-invasive imaging to study and measure 3D models of the bony labyrinth, housing the inner ear, and the braincase endocast. When considering the effects of allometry by regressing each PC1 scores (for each set of measurements) with the cranial geometric mean from linear measurements as a body size proxy, we show that size explains a large amount of the shape variation in horse crania, the bony labyrinths and brain endocasts. We found high intrabreed variation in all the analysed datasets. Globally, there are at least 30 distinct horse populations on islands, offering the chance to further study processes of convergence in morphological divergence and evaluate the effect of drift and the environment. Supplementary Information The online version contains supplementary material available at 10.1007/s42991-024-00408-4.
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Affiliation(s)
- Keesha M. Ming
- Department of Paleontology, University of Zurich, Karl-Schmid-Strasse 4, 8006 Zurich, Switzerland
| | - Kévin Le Verger
- Department of Paleontology, University of Zurich, Karl-Schmid-Strasse 4, 8006 Zurich, Switzerland
| | - Madeleine Geiger
- Naturmuseum St. Gallen, Rorschacher Strasse 263, 9016 St. Gallen, Switzerland
| | - Thomas Schmelzle
- Department of Paleontology, University of Zurich, Karl-Schmid-Strasse 4, 8006 Zurich, Switzerland
| | - Georgios L. Georgalis
- Department of Paleontology, University of Zurich, Karl-Schmid-Strasse 4, 8006 Zurich, Switzerland
- Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016 Kraków, Poland
| | - Genya Shimbo
- Institute of Veterinary Medicine, Hokkaido University, Kita-19, Nishi-8, Kita-Ku, Sapporo, 060-0819 Japan
| | - Motoki Sasaki
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Inada-Cho, Obihiro, Hokkaido 080-8555 Japan
| | - Satoshi D. Ohdachi
- Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-Ku, Sapporo, 060-0819 Japan
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Mennecart B, Dziomber L, Aiglstorfer M, Bibi F, DeMiguel D, Fujita M, Kubo MO, Laurens F, Meng J, Métais G, Müller B, Ríos M, Rössner GE, Sánchez IM, Schulz G, Wang S, Costeur L. Ruminant inner ear shape records 35 million years of neutral evolution. Nat Commun 2022; 13:7222. [PMID: 36473836 PMCID: PMC9726890 DOI: 10.1038/s41467-022-34656-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 11/02/2022] [Indexed: 12/12/2022] Open
Abstract
Extrinsic and intrinsic factors impact diversity. On deep-time scales, the extrinsic impact of climate and geology are crucial, but poorly understood. Here, we use the inner ear morphology of ruminant artiodactyls to test for a deep-time correlation between a low adaptive anatomical structure and both extrinsic and intrinsic variables. We apply geometric morphometric analyses in a phylogenetic frame to X-ray computed tomographic data from 191 ruminant species. Contrasting results across ruminant clades show that neutral evolutionary processes over time may strongly influence the evolution of inner ear morphology. Extant, ecologically diversified clades increase their evolutionary rate with decreasing Cenozoic global temperatures. Evolutionary rate peaks with the colonization of new continents. Simultaneously, ecologically restricted clades show declining or unchanged rates. These results suggest that both climate and paleogeography produced heterogeneous environments, which likely facilitated Cervidae and Bovidae diversification and exemplifies the effect of extrinsic and intrinsic factors on evolution in ruminants.
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Affiliation(s)
- Bastien Mennecart
- grid.482931.50000 0001 2337 4230Naturhistorisches Museum Basel, Augustinergasse 2, 4001 Basel, Switzerland
| | - Laura Dziomber
- grid.5734.50000 0001 0726 5157Institute of Plant Sciences, University of Bern, 3013 Bern, Switzerland ,grid.5734.50000 0001 0726 5157Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland
| | - Manuela Aiglstorfer
- Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz, Reichklarastraße 10, 55116 Mainz, Germany
| | - Faysal Bibi
- grid.422371.10000 0001 2293 9957Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Berlin, 10115 Germany
| | - Daniel DeMiguel
- grid.450869.60000 0004 1762 9673Fundación ARAID, Zaragoza, Spain ,grid.11205.370000 0001 2152 8769Departamento de Ciencias de la Tierra, Área de Paleontología / Instituto Universitario de Investigación en Ciencias Ambientales de Aragón (IUCA). Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain ,grid.7080.f0000 0001 2296 0625Institut Català de Palaeontologia Miquel Crusafont (ICP), Edifici Z, c/de les columnes s/n, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Masaki Fujita
- grid.410801.cNational Museum of Nature and Science, Tsukuba, Japan
| | - Mugino O. Kubo
- grid.26999.3d0000 0001 2151 536XDepartment of Natural Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan
| | - Flavie Laurens
- Swiss National Data and Service Center for the Humanities, 4123 Allschwil, Switzerland
| | - Jin Meng
- grid.212340.60000000122985718American Museum of Natural History, 10024 New York; Earth and Environmental Sciences, Graduate Center, City University of New York, New York, NY 10016 USA
| | - Grégoire Métais
- grid.410350.30000 0001 2174 9334CR2P - Centre de Recherche en Paléontologie - Paris, UMR 7207, CNRS, MNHN, Sorbonne Université. Muséum national d’Histoire naturelle, CP38, 8 rue Buffon, 75005 Paris, France
| | - Bert Müller
- grid.6612.30000 0004 1937 0642Biomaterials Science Center, Department of Biomedical Engineering, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland
| | - María Ríos
- grid.10772.330000000121511713Department of Earth Sciences, GeoBioTec, Nova School of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Gertrud E. Rössner
- Staatliche Naturwissenschaftliche Sammlungen Bayerns - Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Strasse 10, 80333 Munich, Germany ,grid.5252.00000 0004 1936 973XDepartment für Geo- und Umweltwissenschaften, Paläontologie & Geobiologie, Ludwig-Maximilians-Universität München, Richard-Wagner-Strasse 10, 80333 Munich, Germany
| | - Israel M. Sánchez
- grid.7080.f0000 0001 2296 0625Institut Català de Palaeontologia Miquel Crusafont (ICP), Edifici Z, c/de les columnes s/n, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain
| | - Georg Schulz
- grid.6612.30000 0004 1937 0642Biomaterials Science Center, Department of Biomedical Engineering, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland ,grid.6612.30000 0004 1937 0642Micro- and Nanotomography Core Facility, Department of Biomedical Engineering, University of Basel Gewerbestrasse 14, 4123 Allschwil, Switzerland
| | - Shiqi Wang
- grid.9227.e0000000119573309Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xizhimenwai Street, Beijing, 100044 China
| | - Loïc Costeur
- grid.482931.50000 0001 2337 4230Naturhistorisches Museum Basel, Augustinergasse 2, 4001 Basel, Switzerland
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New fossils from Kromdraai and Drimolen, South Africa, and their distinctiveness among Paranthropus robustus. Sci Rep 2022; 12:13956. [PMID: 35977986 PMCID: PMC9385619 DOI: 10.1038/s41598-022-18223-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 08/08/2022] [Indexed: 11/08/2022] Open
Abstract
Most fossil hominin species are sampled with spatial, temporal or anatomical biases that can hinder assessments of their paleodiversity, and may not yield genuine evolutionary signals. We use new fossils from the Kromdraai (Unit P) and Drimolen sites (South Africa) to provide insights into the paleodiversity of the Lower Pleistocene robust australopith, Paranthropus robustus. Our focus is the morphology of the temporal bone and the relationships between size and shape (allometry) of the semi-circular canals (SCC), an aspect that has not yet been investigated among southern African australopiths. We find significant size and shape SCC differences between P. robustus from Kromdraai, Drimolen and Swartkrans. This site-related variation is consistent with other differences observed on the temporal bone. P. robustus from Kromdraai Unit P is distinctive because of its smaller temporal bone and SCC, and its proportionally less developed posterior SCC, independently of age and sex. We emphasize the importance of allometry to interpret paleodiversity in P. robustus as either the consequence of differences in body size, or as yet unknown factors. Some features of the inner ear of P. robustus represent directional selection soon after its origin, whereas the size and shape variations described here may result from evolutionary changes.
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