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Affiliation(s)
- Julia Nowack
- Department of Animal Ecology and Conservation; Biocentre Grindel; University of Hamburg; Martin-Luther-King Platz 3 20146 Hamburg Germany
- Centre for Behavioural and Physiological Ecology, Zoology; University of New England; Armidale NSW 2351 Australia
| | - Kathrin H. Dausmann
- Department of Animal Ecology and Conservation; Biocentre Grindel; University of Hamburg; Martin-Luther-King Platz 3 20146 Hamburg Germany
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Luza AL, Gonçalves GL, Hartz SM. Phylogenetic and morphological relationships between nonvolant small mammals reveal assembly processes at different spatial scales. Ecol Evol 2015; 5:889-902. [PMID: 25750715 PMCID: PMC4338971 DOI: 10.1002/ece3.1407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 11/27/2014] [Accepted: 12/18/2014] [Indexed: 11/06/2022] Open
Abstract
The relative roles of historical processes, environmental filtering, and ecological interactions in the organization of species assemblages vary depending on the spatial scale. We evaluated the phylogenetic and morphological relationships between species and individuals (i.e., inter- and intraspecific variability) of Neotropical nonvolant small mammals coexisting in grassland-forest ecotones, in landscapes and in regions, that is, three different scales. We used a phylogenetic tree to infer evolutionary relationships, and morphological traits as indicators of performance and niche similarities between species and individuals. Subsequently, we applied phylogenetic and morphologic indexes of diversity and distance between species to evaluate small mammal assemblage structures on the three scales. The results indicated a repulsion pattern near forest edges, showing that phylogenetically similar species coexisted less often than expected by chance. The strategies for niche differentiation might explain the phylogenetic repulsion observed at the edge. Phylogenetic and morphological clustering in the grassland and at the forest interior indicated the coexistence of closely related and ecologically similar species and individuals. Coexistence patterns were similar whether species-trait values or individual values were used. At the landscape and regional scales, assemblages showed a predominant pattern of phylogenetic and morphological clustering. Environmental filters influenced the coexistence patterns at three scales, showing the importance of phylogenetically conserved ecological tolerances in enabling taxa co-occurrence. Evidence of phylogenetic repulsion in one region indicated that other processes beyond environmental filtering are important for community assembly at broad scales. Finally, ecological interactions and environmental filtering seemed important at the local scale, while environmental filtering and historical colonization seemed important for community assembly at broader scales.
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Affiliation(s)
- André Luís Luza
- Programa de Pós Graduação em Ecologia, Universidade Federal do Rio Grande do Sul Av. Bento Gonçalves 9500, CEP: 91501-970 - Post-Office Box: 15007, Porto Alegre, Rio Grande do Sul, Brazil
| | - Gislene Lopes Gonçalves
- Departamento de Genética, Universidade Federal do Rio Grande do Sul Av. Bento Gonçalves 9500, CEP: 91501-970, Porto Alegre, Rio Grande do Sul, Brazil ; Instituto de Alta Investigación, Universidad de Tarapacá Antofagasta, 1520, Arica, Chile
| | - Sandra Maria Hartz
- Programa de Pós Graduação em Ecologia, Universidade Federal do Rio Grande do Sul Av. Bento Gonçalves 9500, CEP: 91501-970 - Post-Office Box: 15007, Porto Alegre, Rio Grande do Sul, Brazil
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53
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Tian J, Courtiol A, Schneeberger K, Greenwood AD, Czirják GÁ. Circulating white blood cell counts in captive and wild rodents are influenced by body mass rather than testes mass, a correlate of mating promiscuity. Funct Ecol 2015. [DOI: 10.1111/1365-2435.12394] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jundong Tian
- Department of Wildlife Diseases Leibniz Institute for Zoo and Wildlife Research 10315 Berlin Germany
- Department of Veterinary Medicine Freie Universität Berlin 14163 Berlin Germany
| | - Alexandre Courtiol
- Department of Evolutionary Genetics Leibniz Institute for Zoo and Wildlife Research 10315 Berlin Germany
| | - Karin Schneeberger
- Department of Evolutionary Ecology Leibniz Institute for Zoo and Wildlife Research 10315 Berlin Germany
| | - Alex D. Greenwood
- Department of Wildlife Diseases Leibniz Institute for Zoo and Wildlife Research 10315 Berlin Germany
- Department of Veterinary Medicine Freie Universität Berlin 14163 Berlin Germany
| | - Gábor Á. Czirják
- Department of Wildlife Diseases Leibniz Institute for Zoo and Wildlife Research 10315 Berlin Germany
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54
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Laramée ME, Boire D. Visual cortical areas of the mouse: comparison of parcellation and network structure with primates. Front Neural Circuits 2015; 8:149. [PMID: 25620914 PMCID: PMC4286719 DOI: 10.3389/fncir.2014.00149] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 12/09/2014] [Indexed: 12/27/2022] Open
Abstract
Brains have evolved to optimize sensory processing. In primates, complex cognitive tasks must be executed and evolution led to the development of large brains with many cortical areas. Rodents do not accomplish cognitive tasks of the same level of complexity as primates and remain with small brains both in relative and absolute terms. But is a small brain necessarily a simple brain? In this review, several aspects of the visual cortical networks have been compared between rodents and primates. The visual system has been used as a model to evaluate the level of complexity of the cortical circuits at the anatomical and functional levels. The evolutionary constraints are first presented in order to appreciate the rules for the development of the brain and its underlying circuits. The organization of sensory pathways, with their parallel and cross-modal circuits, is also examined. Other features of brain networks, often considered as imposing constraints on the development of underlying circuitry, are also discussed and their effect on the complexity of the mouse and primate brain are inspected. In this review, we discuss the common features of cortical circuits in mice and primates and see how these can be useful in understanding visual processing in these animals.
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Affiliation(s)
- Marie-Eve Laramée
- Laboratory of Neuroplasticity and Neuroproteomics, Department of Biology, KU Leuven-University of Leuven Leuven, Belgium
| | - Denis Boire
- Département d'anatomie, Université du Québec à Trois-Rivières Trois-Rivières, QC, Canada
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55
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A species-level phylogeny of all extant and late Quaternary extinct mammals using a novel heuristic-hierarchical Bayesian approach. Mol Phylogenet Evol 2014; 84:14-26. [PMID: 25542649 DOI: 10.1016/j.ympev.2014.11.001] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 10/30/2014] [Accepted: 11/02/2014] [Indexed: 11/20/2022]
Abstract
Across large clades, two problems are generally encountered in the estimation of species-level phylogenies: (a) the number of taxa involved is generally so high that computation-intensive approaches cannot readily be utilized and (b) even for clades that have received intense study (e.g., mammals), attention has been centered on relatively few selected species, and most taxa must therefore be positioned on the basis of very limited genetic data. Here, we describe a new heuristic-hierarchical Bayesian approach and use it to construct a species-level phylogeny for all extant and late Quaternary extinct mammals. In this approach, species with large quantities of genetic data are placed nearly freely in the mammalian phylogeny according to these data, whereas the placement of species with lower quantities of data is performed with steadily stricter restrictions for decreasing data quantities. The advantages of the proposed method include (a) an improved ability to incorporate phylogenetic uncertainty in downstream analyses based on the resulting phylogeny, (b) a reduced potential for long-branch attraction or other types of errors that place low-data taxa far from their true position, while maintaining minimal restrictions for better-studied taxa, and (c) likely improved placement of low-data taxa due to the use of closer outgroups.
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56
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57
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Balakirev AE, Abramov AV, Rozhnov VV. Phylogenetic relationships in the Niviventer-Chiromyscus complex (Rodentia, Muridae) inferred from molecular data, with description of a new species. Zookeys 2014; 451:109-36. [PMID: 25493050 PMCID: PMC4258623 DOI: 10.3897/zookeys.451.7210] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 09/03/2014] [Indexed: 12/05/2022] Open
Abstract
Based on molecular data for mitochondrial (Cyt b, COI) and nuclear (IRBP, GHR) genes, and morphological examinations of museum specimens, we examined diversity, species boundaries, and relationships within and between the murine genera Chiromyscus and Niviventer. Phylogenetic patterns recovered demonstrate that Niviventer sensu lato is not monophyletic but instead includes Chiromyscuschiropus, the only previously recognized species of Chiropus. To maintain the genera Niviventer and Chiropus as monophyletic lineages, the scope and definition of the genus Chiromyscus is revised to include at least three distinct species: Chiromyscuschiropus (the type species of Chiromyscus), Chiromyscuslangbianis (previously regarded as a species of Niviventer), and a new species, described in this paper under the name Chiromyscusthomasi sp. n.
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Affiliation(s)
- Alexander E. Balakirev
- Joint Russian-Vietnamese Tropical Research and Technological Centre, Nguyen Van Huyen, Nghia Do, Cau Giay, Hanoi, Vietnam
- A.N. Severtsov’s Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow 119071, Russia
| | - Alexei V. Abramov
- Joint Russian-Vietnamese Tropical Research and Technological Centre, Nguyen Van Huyen, Nghia Do, Cau Giay, Hanoi, Vietnam
- Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, Saint Petersburg 199034, Russia
| | - Viatcheslav V. Rozhnov
- Joint Russian-Vietnamese Tropical Research and Technological Centre, Nguyen Van Huyen, Nghia Do, Cau Giay, Hanoi, Vietnam
- A.N. Severtsov’s Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow 119071, Russia
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58
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Lobban KD, Lovegrove BG, Rakotondravony D. The energetics of a Malagasy rodent, Macrotarsomys ingens (Nesomyinae): a test of island and zoogeographical effects on metabolism. J Comp Physiol B 2014; 184:1077-89. [DOI: 10.1007/s00360-014-0853-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/22/2014] [Accepted: 08/05/2014] [Indexed: 11/24/2022]
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59
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Leite RN, Kolokotronis SO, Almeida FC, Werneck FP, Rogers DS, Weksler M. In the wake of invasion: tracing the historical biogeography of the South American cricetid radiation (Rodentia, Sigmodontinae). PLoS One 2014; 9:e100687. [PMID: 24963664 PMCID: PMC4071052 DOI: 10.1371/journal.pone.0100687] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 05/30/2014] [Indexed: 11/19/2022] Open
Abstract
The Great American Biotic Interchange (GABI) was greatly influenced by the completion of the Isthmus of Panama and impacted the composition of modern faunal assemblages in the Americas. However, the contribution of preceding events has been comparatively less explored, even though early immigrants in the fossil records are evidence for waif dispersals. The cricetid rodents of the subfamily Sigmodontinae are a classic example of a species-rich South American radiation resulting from an early episode of North American invasion. Here, we provide a temporal and spatial framework to address key aspects of the historical biogeography and diversification of this diverse mammal group by using mitochondrial and nuclear DNA datasets coupled with methods of divergence time estimation, ancestral area reconstruction and comparative phylogenetics. Relaxed-clock time estimates indicate that divergence of the Sigmodontinae began in the middle-late Miocene (ca. 12-9 Ma). Dispersal-vicariance analyses point to the arrival of a single lineage of northern invaders with a widespread ancestral distribution and imply that the initial differentiation between Central and South America gave rise to the most basal groups within the subfamily. These two major clades diversified in the late Miocene followed by the radiation of main tribes until the early Pliocene. Within the Oryzomyalia, tribes diverged initially in eastern South America whereas multiple dispersals into the Andes promoted further diversification of the majority of modern genera. A comparatively uniform background tempo of diversification explains the species richness of sigmodontines across most nodes, except for two akodontine genera with recent increases in diversification rates. The bridging of the Central American seaway and episodes of low sea levels likely facilitated the invasion of South America long before the onset of the post-Isthmian phase of the GABI.
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Affiliation(s)
- Rafael N. Leite
- Department of Biology, Brigham Young University, Provo, Utah, United States of America
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | | | | | - Fernanda P. Werneck
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | - Duke S. Rogers
- Department of Biology, Brigham Young University, Provo, Utah, United States of America
- Monte L. Bean Life Science Museum, Brigham Young University, Provo, Utah, United States of America
| | - Marcelo Weksler
- Departamento de Zoologia, Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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60
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St. Juliana JR, Khokhlova IS, Wielebnowski N, Kotler BP, Krasnov BR. Ectoparasitism and stress hormones: strategy of host exploitation, common host-parasite history and energetics matter. J Anim Ecol 2014; 83:1113-23. [DOI: 10.1111/1365-2656.12217] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Accepted: 03/06/2014] [Indexed: 12/14/2022]
Affiliation(s)
- Justin R. St. Juliana
- Department of Biology; Indiana State University; 200 N. 7th St. Terre Haute IN 47809 USA
- Mitrani Department of Desert Ecology; Swiss Institute for Dryland Environmental and Energy Research; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Midreshet Ben-Gurion Israel
- Department of Life and Physical Science; Ivy Tech Community College Wabash Valley; 8000 S. Education Drive Terre Haute IN 47802 USA
| | - Irina S. Khokhlova
- Wyler Department of Dryland Agriculture; French Associates Institute for Agriculture and Biotechnology of Drylands Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Midreshet Ben-Gurion Israel
| | - Nadja Wielebnowski
- Department of Conservation Science; Chicago Zoological Society/Brookfield Zoo; 3300 Golf Road Brookfield IL 60513 USA
- Conservation Research Division; Oregon Zoo; 4001 SW Canyon Rd. Portland OR 97221 USA
| | - Burt P. Kotler
- Mitrani Department of Desert Ecology; Swiss Institute for Dryland Environmental and Energy Research; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Midreshet Ben-Gurion Israel
| | - Boris R. Krasnov
- Mitrani Department of Desert Ecology; Swiss Institute for Dryland Environmental and Energy Research; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Midreshet Ben-Gurion Israel
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61
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Heaney LR, Balete DS, Rickart EA, Veluz MJ, Jansa SA. Three New Species ofMusseromys(Muridae, Rodentia), the Endemic Philippine Tree Mouse from Luzon Island. AMERICAN MUSEUM NOVITATES 2014. [DOI: 10.1206/3802.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Solano E, Taylor PJ, Rautenbach A, Ropiquet A, Castiglia R. Cryptic speciation and chromosomal repatterning in the South African climbing mice Dendromus (Rodentia, Nesomyidae). PLoS One 2014; 9:e88799. [PMID: 24551165 PMCID: PMC3923822 DOI: 10.1371/journal.pone.0088799] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 11/09/2013] [Indexed: 01/15/2023] Open
Abstract
We evaluate the intra- and interspecific diversity in the four South African rodent species of the genus Dendromus. The molecular phylogenetic analysis on twenty-three individuals have been conducted on a combined dataset of nuclear and mitochondrial markers. Moreover, the extent and processes underlying chromosomal variation, have been investigated on three species by mean of G-, C-bands, NORs and Zoo-FISH analysis. The molecular analysis shows the presence of six monophyletic lineages corresponding to D. mesomelas, D. mystacalis and four lineages within D. cfr. melanotis with high divergence values (ranges: 10.6% – 18.3%) that raises the question of the possible presence of cryptic species. The first description of the karyotype for D. mesomelas and D. mystacalis and C- and G- banding for one lineage of D. cfr. melanotis are reported highlighting an extended karyotype reorganization in the genus. Furthermore, the G-banding and Zoo-FISH evidenced an autosome-sex chromosome translocation characterizing all the species and our timing estimates this mutation date back 7.4 mya (Late Miocene). Finally, the molecular clock suggests that cladogenesis took place since the end of Miocene to Plio-Pleistocene, probably due to ecological factors, isolation in refugia followed by differential adaptation to the mesic or dry habitat.
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Affiliation(s)
- Emanuela Solano
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, Rome, Italy
- * E-mail:
| | - Peter J. Taylor
- Department of Ecology & Resource Management, School of Environmental Sciences, Thohoyandou, South Africa
- School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Anita Rautenbach
- School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Anne Ropiquet
- Imperial College London Silwood Park Campus, Ascot, Berks, United Kingdom
| | - Riccardo Castiglia
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, Rome, Italy
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63
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Lin GH, Wang K, Deng XG, Nevo E, Zhao F, Su JP, Guo SC, Zhang TZ, Zhao H. Transcriptome sequencing and phylogenomic resolution within Spalacidae (Rodentia). BMC Genomics 2014; 15:32. [PMID: 24438217 PMCID: PMC3898070 DOI: 10.1186/1471-2164-15-32] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 01/14/2014] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Subterranean mammals have been of great interest for evolutionary biologists because of their highly specialized traits for the life underground. Owing to the convergence of morphological traits and the incongruence of molecular evidence, the phylogenetic relationships among three subfamilies Myospalacinae (zokors), Spalacinae (blind mole rats) and Rhizomyinae (bamboo rats) within the family Spalacidae remain unresolved. Here, we performed de novo transcriptome sequencing of four RNA-seq libraries prepared from brain and liver tissues of a plateau zokor (Eospalax baileyi) and a hoary bamboo rat (Rhizomys pruinosus), and analyzed the transcriptome sequences alongside a published transcriptome of the Middle East blind mole rat (Spalax galili). We characterize the transcriptome assemblies of the two spalacids, and recover the phylogeny of the three subfamilies using a phylogenomic approach. RESULTS Approximately 50.3 million clean reads from the zokor and 140.8 million clean reads from the bamboo ratwere generated by Illumina paired-end RNA-seq technology. All clean reads were assembled into 138,872 (the zokor) and 157,167 (the bamboo rat) unigenes, which were annotated by the public databases: the Swiss-prot, Trembl, NCBI non-redundant protein (NR), NCBI nucleotide sequence (NT), Gene Ontology (GO), Cluster of Orthologous Groups (COG), and Kyoto Encyclopedia of Genes and Genomes (KEGG). A total of 5,116 nuclear orthologous genes were identified in the three spalacids and mouse, which was used as an outgroup. Phylogenetic analysis revealed a sister group relationship between the zokor and the bamboo rat, which is supported by the majority of gene trees inferred from individual orthologous genes, suggesting subfamily Myospalacinae is more closely related to subfamily Rhizomyinae. The same topology was recovered from concatenated sequences of 5,116 nuclear genes, fourfold degenerate sites of the 5,116 nuclear genes and concatenated sequences of 13 protein coding mitochondrial genes. CONCLUSIONS This is the first report of transcriptome sequencing in zokors and bamboo rats, representing a valuable resource for future studies of comparative genomics in subterranean mammals. Phylogenomic analysis provides a conclusive resolution of interrelationships of the three subfamilies within the family Spalacidae, and highlights the power of phylogenomic approach to dissect the evolutionary history of rapid radiations in the tree of life.
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Affiliation(s)
| | | | | | | | | | | | | | - Tong-Zuo Zhang
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China.
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Carrizo LV, Tulli MJ, Dos Santos DA, Abdala V. Interplay between postcranial morphology and locomotor types in Neotropical sigmodontine rodents. J Anat 2013; 224:469-81. [PMID: 24372154 DOI: 10.1111/joa.12152] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2013] [Indexed: 11/29/2022] Open
Abstract
Sigmodontine rats are one of the most diverse components of the Neotropical mammal fauna. They exhibit a wide ecological diversity and a variety of locomotor types that allow them to occupy different environments. To explore the relationship between morphology and locomotor types, we analyzed traits of the postcranial osteology (axial and appendicular skeletons) of 329 specimens belonging to 51 species and 29 genera of sigmodontines exhibiting different locomotor types. In this work, postcranial skeletal characters of these rats are considered in an ecomorphological study for the first time. Statistical analyses showed that of the 34 osteological characters considered, 15 were related to the locomotor types studied, except for ambulatory. However, character mapping showed that climbing and jumping sigmodontines are the only taxa exhibiting clear adaptations in their postcranial osteology, which are highly consistent with the tendencies described in many other mammal taxa. Climbing, digging and swimming rats presented statistically differences in traits associated with their vertebral column and limbs, whereas jumping rats showed modifications associated with all the skeletal regions. Our data suggest that sigmodontine rats retain an all-purpose morphology that allows them to use a variety of habitats. This versatility is particularly important when considering the lack of specialization of sigmodontines for a specific locomotor mode. Another possible interpretation is that our dataset probably did not consider relevant information about these groups and should be increased with other types of characters (e.g. characters from the external morphology, myology, etc.).
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Affiliation(s)
- Luz V Carrizo
- Cátedra de Biología General, Facultad de Ciencias Naturales e IML, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina
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Achmadi AS, Esselstyn JA, Rowe KC, Maryanto I, Abdullah MT. Phylogeny, diversity, and biogeography of Southeast Asian spiny rats (Maxomys). J Mammal 2013. [DOI: 10.1644/13-mamm-a-092.1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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66
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Gómez Cano AR, Hernández Fernández M, Álvarez-Sierra MÁ. Dietary ecology of Murinae (Muridae, Rodentia): a geometric morphometric approach. PLoS One 2013; 8:e79080. [PMID: 24236090 PMCID: PMC3827291 DOI: 10.1371/journal.pone.0079080] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 09/27/2013] [Indexed: 11/24/2022] Open
Abstract
Murine rodents represent a highly diverse group, which displays great ecological versatility. In the present paper we analyse the relationship between dental morphology, on one hand, using geometric morphometrics based upon the outline of first upper molar and the dietary preference of extant murine genera, on the other. This ecomorphological study of extant murine rodents demonstrates that dietary groups can be distinguished with the use of a quantitative geometric morphometric approach based on first upper molar outline. A discriminant analysis of the geometric morphometric variables of the first upper molars enables us to infer the dietary preferences of extinct murine genera from the Iberian Peninsula. Most of the extinct genera were omnivore; only Stephanomys showed a pattern of dental morphology alike that of the herbivore genera.
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Affiliation(s)
- Ana Rosa Gómez Cano
- Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain
- * E-mail:
| | - Manuel Hernández Fernández
- Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain
- Departamento de Geología Sedimentaria y Cambio Medioambiental, Instituto de Geociencias (UCM, CSIC), Madrid, Spain
| | - M. Ángeles Álvarez-Sierra
- Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain
- Departamento de Geología Sedimentaria y Cambio Medioambiental, Instituto de Geociencias (UCM, CSIC), Madrid, Spain
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Khokhlova IS, Pilosof S, Fielden LJ, Degen AA, Krasnov BR. A trade-off between quantity and quality of offspring in haematophagous ectoparasites: the effect of the level of specialization. J Anim Ecol 2013; 83:397-405. [DOI: 10.1111/1365-2656.12134] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 08/08/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Irina S. Khokhlova
- Wyler Department of Dryland Agriculture; French Associates Institute for Agriculture and Biotechnology of Drylands; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Sede-Boqer Campus; Midreshet Ben-Gurion 84990 Israel
| | - Shai Pilosof
- Mitrani Department of Desert Ecology; Swiss Institute for Dryland Environmental and Energy Research; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Sede-Boqer Campus; Midreshet Ben-Gurion 84990 Israel
| | - Laura J. Fielden
- School of Science and Math; Truman State University; Kirksville MO 63501 USA
| | - A. Allan Degen
- Wyler Department of Dryland Agriculture; French Associates Institute for Agriculture and Biotechnology of Drylands; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Sede-Boqer Campus; Midreshet Ben-Gurion 84990 Israel
| | - Boris R. Krasnov
- Mitrani Department of Desert Ecology; Swiss Institute for Dryland Environmental and Energy Research; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Sede-Boqer Campus; Midreshet Ben-Gurion 84990 Israel
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Fabre PH, Pagès M, Musser GG, Fitriana YS, Fjeldså J, Jennings A, Jønsson KA, Kennedy J, Michaux J, Semiadi G, Supriatna N, Helgen KM. A new genus of rodent from Wallacea (Rodentia: Muridae: Murinae: Rattini), and its implication for biogeography and Indo-Pacific Rattini systematics. Zool J Linn Soc 2013. [DOI: 10.1111/zoj.12061] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Pierre-Henri Fabre
- Center for Macroecology, Evolution and Climate (CMEC, Department of Biology), Zoological Museum; University of Copenhagen; Universitetsparken 15 DK-2100 Copenhagen Denmark
| | - Marie Pagès
- Laboratoire de génétique des microorganismes; Université de Liège; 4000 Liège Belgique
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro); Campus International de Baillarguet; CS 30016 34988 Montferrier-sur-Lez Cedex France
| | - Guy G. Musser
- Division of Vertebrate Zoology (Mammalogy); American Museum of Natural History; New York NY 10024 USA
| | - Yuli S. Fitriana
- Museum Zoologicum Bogoriense; Research Center For Biology; Indonesian Institute of Sciences (LIPI); Jl.Raya Jakarta-Bogor Km.46 Cibinong 16911 Indonesia
| | - Jon Fjeldså
- Center for Macroecology, Evolution and Climate (CMEC, Department of Biology), Zoological Museum; University of Copenhagen; Universitetsparken 15 DK-2100 Copenhagen Denmark
| | - Andy Jennings
- Muséum National d'Histoire Naturelle; Département Systématique et Evolution CP 51; 57 Rue Cuvier 75231 Paris France
| | - Knud A. Jønsson
- Center for Macroecology, Evolution and Climate (CMEC, Department of Biology), Zoological Museum; University of Copenhagen; Universitetsparken 15 DK-2100 Copenhagen Denmark
| | - Jonathan Kennedy
- Center for Macroecology, Evolution and Climate (CMEC, Department of Biology), Zoological Museum; University of Copenhagen; Universitetsparken 15 DK-2100 Copenhagen Denmark
| | - Johan Michaux
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro); Campus International de Baillarguet; CS 30016 34988 Montferrier-sur-Lez Cedex France
| | - Gono Semiadi
- Museum Zoologicum Bogoriense; Research Center For Biology; Indonesian Institute of Sciences (LIPI); Jl.Raya Jakarta-Bogor Km.46 Cibinong 16911 Indonesia
| | - Nanang Supriatna
- Museum Zoologicum Bogoriense; Research Center For Biology; Indonesian Institute of Sciences (LIPI); Jl.Raya Jakarta-Bogor Km.46 Cibinong 16911 Indonesia
| | - Kristofer M. Helgen
- National Museum of Natural History; Smithsonian. Institution; P.O. Box 37012 MRC 108 Washington DC 20013-7012 USA
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69
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Schenk JJ, Rowe KC, Steppan SJ. Ecological Opportunity and Incumbency in the Diversification of Repeated Continental Colonizations by Muroid Rodents. Syst Biol 2013; 62:837-64. [DOI: 10.1093/sysbio/syt050] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- John J. Schenk
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA; and 2Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia
| | - Kevin C. Rowe
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA; and 2Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia
| | - Scott J. Steppan
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA; and 2Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia
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70
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71
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Snell-Rood EC, Wick N. Anthropogenic environments exert variable selection on cranial capacity in mammals. Proc Biol Sci 2013; 280:20131384. [PMID: 23966638 DOI: 10.1098/rspb.2013.1384] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It is thought that behaviourally flexible species will be able to cope with novel and rapidly changing environments associated with human activity. However, it is unclear whether such environments are selecting for increases in behavioural plasticity, and whether some species show more pronounced evolutionary changes in plasticity. To test whether anthropogenic environments are selecting for increased behavioural plasticity within species, we measured variation in relative cranial capacity over time and space in 10 species of mammals. We predicted that urban populations would show greater cranial capacity than rural populations and that cranial capacity would increase over time in urban populations. Based on relevant theory, we also predicted that species capable of rapid population growth would show more pronounced evolutionary responses. We found that urban populations of two small mammal species had significantly greater cranial capacity than rural populations. In addition, species with higher fecundity showed more pronounced differentiation between urban and rural populations. Contrary to expectations, we found no increases in cranial capacity over time in urban populations-indeed, two species tended to have a decrease in cranial capacity over time in urban populations. Furthermore, rural populations of all insectivorous species measured showed significant increases in relative cranial capacity over time. Our results provide partial support for the hypothesis that urban environments select for increased behavioural plasticity, although this selection may be most pronounced early during the urban colonization process. Furthermore, these data also suggest that behavioural plasticity may be simultaneously favoured in rural environments, which are also changing because of human activity.
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Affiliation(s)
- Emilie C Snell-Rood
- Department of Ecology, Evolution and Behavior, University of Minnesota, Twin Cities, MN, USA.
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72
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Tiphaine C, Yaowalak C, Cyril C, Helder GR, Jacques M, Paul T, Monique VL, Laurent V, Vincent L. Correlated changes in occlusal pattern and diet in stem Murinae during the onset of the radiation of Old World rats and mice. Evolution 2013; 67:3323-38. [PMID: 24152010 DOI: 10.1111/evo.12172] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 05/13/2013] [Indexed: 11/28/2022]
Abstract
Adaptive radiations in mammals are sometimes associated with the emergence of key dental innovations facilitating food processing and masticatory movements. The dietary aspects of such innovations constitute an important focus in evolutionary biology. Murine rodents, which originated during middle Miocene, currently constitute the largest extant mammalian subfamily. Their adaptive radiation combines an original chewing motion with a peculiar occlusal pattern. The fossil record clearly establishes the timing of acquisitions of those innovations, and the aim of our study was to estimate the dietary changes associated with each of them. Fossil taxa phylogenetically closest to Murinae were investigated through the use of geographic information system applied on maps obtained from first upper molars digitized by X-ray synchrotron microtomography. This methodology enables estimation of quantitative topographic descriptors of the dietary specializations of the molar crown. The peculiar forwardly directed chewing motion acquired by stem Murinae may have been a key innovation allowing the invasion of an insectivorous dietary niche. The further radiation of crown Murinae coincides with the return to the plant-dominated omnivorous dietary niche of their distant ancestors through the acquisition of new morphological traits. The retention of the forwardly directed chewing motion by the crown Murinae could have become a competitive advantage in the context of a more generalist diet.
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Affiliation(s)
- Coillot Tiphaine
- Institut de Paléoprimatologie, Paléontologie Humaine, Évolution et Paléoenvironnements, CNRS UMR 7262 INEE, Université de Poitiers, 86022, Poitiers Cedex, France
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73
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Kidd M, Gustafsson B, Modlin IM. Gastric carcinoids (neuroendocrine neoplasms). Gastroenterol Clin North Am 2013; 42:381-97. [PMID: 23639647 DOI: 10.1016/j.gtc.2013.01.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Gastric neuroendocrine neoplasms of the stomach can be divided into the usually well-differentiated, hypergastrinemia-dependent type I and II lesions and the more aggressively behaving gastrin-independent type III lesions. Studying menin and its complex interrelationship with gastrin may provide insight into tumor biology at the clinical level and in terms of basic cell biology (eg, the role of the epigenome in neuroendocrine cell proliferation), and lead to potential consideration of other targets that are known candidates for molecular-based therapies in other adenocarcinomas.
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Affiliation(s)
- Mark Kidd
- Department of Surgery, Yale University School of Medicine, New Haven, CT, USA.
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74
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Frynta D, Šimková O, Lišková S, Landová E. Mammalian collection on Noah's Ark: the effects of beauty, brain and body size. PLoS One 2013; 8:e63110. [PMID: 23690985 PMCID: PMC3654911 DOI: 10.1371/journal.pone.0063110] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 03/28/2013] [Indexed: 11/19/2022] Open
Abstract
The importance of today's zoological gardens as the so-called "Noah's Ark" grows as the natural habitat of many species quickly diminishes. Their potential to shelter a large amount of individuals from many species gives us the opportunity to reintroduce a species that disappeared in nature. However, the selection of animals to be kept in zoos worldwide is highly selective and depends on human decisions driven by both ecological criteria such as population size or vulnerability and audience-driven criteria such as aesthetic preferences. Thus we focused our study on the most commonly kept and bred animal class, the mammals, and we asked which factors affect various aspects of the mammalian collection of zoos. We analyzed the presence/absence, population size, and frequency per species of each of the 123 mammalian families kept in the worldwide zoo collection. Our aim was to explain these data using the human-perceived attractiveness of mammalian families, their body weight, relative brain size and species richness of the family. In agreement with various previous studies, we found that the body size and the attractiveness of mammals significantly affect all studied components of the mammalian collection of zoos. There is a higher probability of the large and attractive families to be kept. Once kept, these animals are presented in larger numbers in more zoos. On the contrary, the relative mean brain size only affects the primary selection whether to keep the family or not. It does not affect the zoo population size or the number of zoos that keep the family.
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Affiliation(s)
- Daniel Frynta
- Department of Zoology, Faculty of Sciences, Charles University in Prague, Prague, Czech Republic.
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75
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Evolution of the ABPA subunit of androgen-binding protein expressed in the submaxillary glands in New and Old World rodent taxa. J Mol Evol 2013; 76:324-31. [PMID: 23636475 DOI: 10.1007/s00239-013-9561-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 04/12/2013] [Indexed: 10/26/2022]
Abstract
The salivary androgen-binding proteins (ABPs) are members of the secretoglobin gene family present in mammals. Each ABP is a heterodimer assembled as an ABPA subunit encoded by an Abpa gene and linked by disulfide bridges to an ABPBG subunit encoded by an Abpbg gene. The ABP dimers are secreted into the saliva of mice and then transferred to the pelage after grooming and subsequently to the environment allowing an animal to mark territory with a biochemical signal. The putative role of the mouse salivary ABPs is that of pheromones mediating mate selection resulting in assortative mating in the Mus musculus species complex. We focused on comparing patterns of molecular evolution between the Abpa genes expressed in the submaxillary glands of species of New World and Old World muroids. We found that in both sets of rodents the Abpa genes expressed in the submaxillary glands appear to be evolving under a similar evolutionary regime, with relatively high nonsynonymous substitution rates, suggesting that ABP might play a similar biological role in both systems. Thus, ABP could be involved with mate recognition and species isolation in New World as well as Old World muroids.
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76
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Su J, Ji W, Wang J, Gleeson DM, Zhou J, Hua L, Wei Y. Phylogenetic relationships of extant zokors (Myospalacinae) (Rodentia, Spalacidae) inferred from mitochondrial DNA sequences. ACTA ACUST UNITED AC 2013; 25:135-41. [PMID: 23607477 DOI: 10.3109/19401736.2013.784747] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, we use three mitochondrial markers, cytochrome b gene (Cyt b), NADH dehydrogenase subunit 4 (ND4) and control region (D-loop) to investigate the phylogenetic relationships of extant zokor species in Mysopalacinae. The phylogenetic tree constructed based on Cyt b strongly supports the monophyly genera Eospalax and Myospalax with E. fontanierii being the most ancient species in Eospalax. Further phylogenetic analyses of four species of Eospalax based on ND4 and D-loop sequences revealed two clades that correspond to two geographical distributions. The basal clade includes E. cansus which is mainly found on Loess Plateau (LP) and another clade including E. baileyi, E. smithii and E. rufescens that inhabits areas above 2000 m on Qinghai-Tibetan Plateau (QTP) and Qinling Mountains. Geographical events of QTP and LP may have played a major role in the diversification and evolution of Mysopalacinae.
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Affiliation(s)
- Junhu Su
- College of Grassland Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem (Gansu Agricultural University), Ministry of Education , Lanzhou , P.R. China
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77
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Parada A, Pardiñas UF, Salazar-Bravo J, D’Elía G, Palma RE. Dating an impressive Neotropical radiation: Molecular time estimates for the Sigmodontinae (Rodentia) provide insights into its historical biogeography. Mol Phylogenet Evol 2013; 66:960-8. [DOI: 10.1016/j.ympev.2012.12.001] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 12/02/2012] [Accepted: 12/03/2012] [Indexed: 11/24/2022]
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78
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Shahabi S, Aliabadian M, Darvish J, Kilpatrick CW. Molecular phylogeny of brush-tailed mice of the genus Calomyscus (Rodentia: Calomyscidae) inferred from mitochondrial DNA sequences (Cox1 gene). MAMMALIA 2013. [DOI: 10.1515/mammalia-2012-0081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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79
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Lebedev VS, Bannikova AA, Pagès M, Pisano J, Michaux JR, Shenbrot GI. Molecular phylogeny and systematics of Dipodoidea: a test of morphology-based hypotheses. ZOOL SCR 2012. [DOI: 10.1111/zsc.12002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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80
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Soltis J, Alligood CA, Blowers TE, Savage A. The vocal repertoire of the Key Largo woodrat (Neotoma floridana smalli). THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2012; 132:3550-8. [PMID: 23145634 DOI: 10.1121/1.4757097] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The Key Largo woodrat (Neotoma floridana smalli) is an endangered rodent endemic to the island of Key Largo, FL. There is little information on vocal communication in this species and descriptions of the acoustic structure of calls are lacking. A captive breeding program was established as part of the recovery plan for the species, providing the opportunity to investigate the vocal repertoire and acoustic structure of calls in both wild and captive contexts. Audio and video recordings were conducted at the Crocodile Lake National Wildlife Refuge in Key Largo and at Disney's Animal Kingdom(®). Analysis of the acoustic structure of calls resulted in four provisional call types: "Tonal calls" consisted of "ultrasonic vocalizations" (40 kHz fundamental frequency, F(0)), "high squeaks" (10 kHz F(0)), and "squeaks" (1.8 kHz F(0)). "Noisy," broadband calls known as "raspy" vocalizations did not exhibit fundamental frequencies, but contained several prominent spectral peaks (from 9 to 40 kHz). The social contexts of vocal production showed that all four call types were associated with pup need or interactions between pups and dams, and that raspy vocalizations were associated with courtship and copulation. Adults without pups exhibited little or no vocal activity, which may result from solitary lifestyles and predator avoidance.
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Affiliation(s)
- Joseph Soltis
- Education and Science Department, Disney's Animal Kingdom, 1200 North Savannah Circle East, Lake Buena Vista, Florida 32830, USA.
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81
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López-Antoñanzas R, Flynn LJ, Knoll F. A comprehensive phylogeny of extinct and extant Rhizomyinae (Rodentia): evidence for multiple intercontinental dispersals. Cladistics 2012; 29:247-273. [DOI: 10.1111/j.1096-0031.2012.00426.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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82
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Zhou C, Zhou K. The validity of different zokor species and the genus Eospalax inferred from mitochondrial gene sequences. Integr Zool 2012; 3:290-8. [PMID: 21396079 DOI: 10.1111/j.1749-4877.2008.00108.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
To help resolve the systematic position of Myospalacine (zokors) and to clarify the phylogenetic relationships among zokor species, complete mitochondrial 12S rRNA and cytochrome b gene sequences were determined for seven zokor species from China. Phylogenetic relationships among all extant zokors, except the Siberian zokor (Myospalax myospalax) and Smith's zokor (Eospalax smithi), were reconstructed with the Chinese bamboo rat (Rhizomys sinensis) as an outgroup. Our results support the generic status of Eospalax and also support the validity of the specific status of Eospalax cansus, Eospalax baileyi and Eospalax rufescens.
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Affiliation(s)
- Caiquan Zhou
- Institute of Rare Animals and Plants, China West Normal University, Nanchong, China Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China
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83
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Yoshida K, Kitano J. The contribution of female meiotic drive to the evolution of neo-sex chromosomes. Evolution 2012; 66:3198-208. [PMID: 23025609 PMCID: PMC3494977 DOI: 10.1111/j.1558-5646.2012.01681.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 04/22/2012] [Indexed: 11/28/2022]
Abstract
Sex chromosomes undergo rapid turnover in certain taxonomic groups. One of the mechanisms of sex chromosome turnover involves fusions between sex chromosomes and autosomes. Sexual antagonism, heterozygote advantage, and genetic drift have been proposed as the drivers for the fixation of this evolutionary event. However, all empirical patterns of the prevalence of multiple sex chromosome systems across different taxa cannot be simply explained by these three mechanisms. In this study, we propose that female meiotic drive may contribute to the evolution of neo-sex chromosomes. The results of this study showed that in mammals, the XY(1) Y(2) sex chromosome system is more prevalent in species with karyotypes of more biarmed chromosomes, whereas the X(1) X(2) Y sex chromosome system is more prevalent in species with predominantly acrocentric chromosomes. In species where biarmed chromosomes are favored by female meiotic drive, X-autosome fusions (XY(1) Y(2) sex chromosome system) will be also favored by female meiotic drive. In contrast, in species with more acrocentric chromosomes, Y-autosome fusions (X(1) X(2) Y sex chromosome system) will be favored just because of the biased mutation rate toward chromosomal fusions. Further consideration should be given to female meiotic drive as a mechanism in the fixation of neo-sex chromosomes.
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Affiliation(s)
- Kohta Yoshida
- Ecological Genetics Laboratory, Center for Frontier Research, National Institute of GeneticsYata 1111, Mishima, Shizuoka 411–8540, Japan
| | - Jun Kitano
- Ecological Genetics Laboratory, Center for Frontier Research, National Institute of GeneticsYata 1111, Mishima, Shizuoka 411–8540, Japan
- PRESTO, Japan Science and Technology Agency, Honcho KawaguchiSaitama 332-0012, Japan
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84
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Balete DS, Rickart EA, Heaney LR, Alviola PA, Duya MV, Duya MRM, Sosa T, Jansa SA. Archboldomys(Muridae: Murinae) Reconsidered: A New Genus and Three New Species of Shrew Mice from Luzon Island, Philippines. AMERICAN MUSEUM NOVITATES 2012. [DOI: 10.1206/3754.2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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85
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Stevenson TJ, Hahn TP, MacDougall-Shackleton SA, Ball GF. Gonadotropin-releasing hormone plasticity: a comparative perspective. Front Neuroendocrinol 2012; 33:287-300. [PMID: 23041619 PMCID: PMC3484179 DOI: 10.1016/j.yfrne.2012.09.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 09/04/2012] [Accepted: 09/05/2012] [Indexed: 11/16/2022]
Abstract
Gonadotropin-releasing hormone 1 (GnRH1) is a key regulator of the reproductive neuroendocrine system in vertebrates. Recent developments have suggested that GnRH1 neurons exhibit far greater plasticity at the cellular and molecular levels than previously thought. Furthermore, there is growing evidence that sub-populations of GnRH1 neurons in the preoptic area are highly responsive to specific environmental and hormonal conditions. In this paper we discuss findings that reveal large variation in GnRH1 mRNA and protein expression that are regulated by social cues, photoperiod, and hormonal feedback. We draw upon studies using histochemistry and immediate early genes (e.g., c-FOS/ZENK) to illustrate that specific groups of GnRH1 neurons are topographically organized. Based on data from diverse vertebrate species, we suggest that GnRH1 expression within individuals is temporally dynamic and this plasticity may be evolutionarily conserved. We suggest that the plasticity observed in other neuropeptide systems (i.e. kisspeptin) may have evolved in a similar manner.
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Affiliation(s)
- T J Stevenson
- Institute for Mind and Biology, University of Chicago, Chicago, IL 60637, USA.
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86
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Chaves R, Louzada S, Meles S, Wienberg J, Adega F. Praomys tullbergi (Muridae, Rodentia) genome architecture decoded by comparative chromosome painting with Mus and Rattus. Chromosome Res 2012; 20:673-83. [PMID: 22847644 DOI: 10.1007/s10577-012-9304-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 06/28/2012] [Accepted: 06/29/2012] [Indexed: 11/25/2022]
Abstract
The order Rodentia and in particular the Muridae are characterised by extremely high rates of chromosome evolution and remarkable chromosome diversity. The Praomys group (Murinae, Muridae and Rodentia) constitutes a diverse and abundant group divided into two complexes, the jacksoni complex and the tullbergi complex which includes the species Praomys tullbergi. Comparative chromosome painting using the two index genomes, Mus musculus and Rattus norvegicus, was performed resulting in a high resolution chromosome map for P. tullbergi. The combined use of rat and mouse probes and the assistance of the assembly of all the available sequencing data from Ensembl genome browser allowed a great dissection of P. tullbergi genome, the detection of inversion events and ultimately the refinement of P. tullbergi comparative map. A key achievement was the reconstruction of a high precision Muroidea ancestral karyotype (Muridae/Cricetidae and Murine) based in a broad species analysis combining previous reported comparative maps together with the presented data. This permitted the reconstruction of the evolutionary history of chromosome changes since the ancestral Muroidea genome and enlightened the phylogenetic relationships with the related species mouse and rat. The analysis of constitutive heterochromatin and its co-localisation with the identified evolutionary breakpoints regions was performed suggesting the involvement of repetitive sequences in the chromosome rearrangements that originated the present P. tullbergi genome architecture.
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Affiliation(s)
- Raquel Chaves
- Centre of Genomics and Biotechnology, Institute for Biotechnology and Bioengineering, University of Trás-os-Montes and Alto Douro (IBB/CGB-UTAD), Vila Real, Portugal.
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87
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Khokhlova IS, Fielden LJ, Degen AA, Krasnov BR. Digesting blood of an auxiliary host in fleas: effect of phylogenetic distance from a principal host. ACTA ACUST UNITED AC 2012; 215:1259-65. [PMID: 22442362 DOI: 10.1242/jeb.066878] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Fleas are haematophagous ectoparasites that exhibit varying degrees of host specificity. Flea abundance is highest on principal hosts and lower on auxiliary hosts but may vary greatly among auxiliary hosts. We investigated the feeding and energy expenditure for digestion in two flea species Parapulex chephrenis and Xenopsylla ramesis on a principal host (Acomys cahirinus and Meriones crassus, respectively) and eight auxiliary host species. We predicted that fleas would perform better - that is (i) a higher proportion of fleas would take a blood meal, (ii) fleas would take larger blood meals and (iii) fleas would spend less energy on digestion - if they fed on (i) a principal host compared with an auxiliary host and (ii) an auxiliary host phylogenetically close to a principal host compared with an auxiliary host phylogenetically distant from a principal host. Energy costs of digestion were estimated using CO(2) emission and represented energy cost during the first stage of blood digestion. Contrary to our predictions, fleas did not always perform better on a principal than on an auxiliary host or on auxiliary hosts phylogenetically closer to the principal host than on auxiliary hosts phylogenetically distant from a principal host. Variation in flea feeding performance may result from the interplay of several factors including co-occurrence between hosts and susceptibility of a host to flea attacks, the species-specific level of immunocompetence of a host and the level of host specificity of a flea. This study describes the first investigation into the metabolic expenditure of parasitism and its relationship to phylogenetic relationships amongst hosts.
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Affiliation(s)
- Irina S Khokhlova
- Desert Animal Adaptations and Husbandry, Wyler Department of Dryland Agriculture, French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, 84990 Midreshet Ben-Gurion, Israel
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88
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Montgelard C, Matthee CA. Tempo of genetic diversification in southern African rodents: The role of Plio-Pleistocene climatic oscillations as drivers for speciation. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 2012. [DOI: 10.1016/j.actao.2012.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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89
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Pine RH, Timm RM, Weksler M. A newly recognized clade of trans-Andean Oryzomyini (Rodentia: Cricetidae), with description of a new genus. J Mammal 2012. [DOI: 10.1644/11-mamm-a-012.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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90
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Fabre PH, Hautier L, Dimitrov D, Douzery EJP. A glimpse on the pattern of rodent diversification: a phylogenetic approach. BMC Evol Biol 2012; 12:88. [PMID: 22697210 PMCID: PMC3532383 DOI: 10.1186/1471-2148-12-88] [Citation(s) in RCA: 300] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Accepted: 05/14/2012] [Indexed: 11/17/2022] Open
Abstract
Background Development of phylogenetic methods that do not rely on fossils for the study of evolutionary processes through time have revolutionized the field of evolutionary biology and resulted in an unprecedented expansion of our knowledge about the tree of life. These methods have helped to shed light on the macroevolution of many taxonomic groups such as the placentals (Mammalia). However, despite the increase of studies addressing the diversification patterns of organisms, no synthesis has addressed the case of the most diversified mammalian clade: the Rodentia. Results Here we present a rodent maximum likelihood phylogeny inferred from a molecular supermatrix. It is based on 11 mitochondrial and nuclear genes that covers 1,265 species, i.e., respectively 56% and 81% of the known specific and generic rodent diversity. The inferred topology recovered all Rodentia clades proposed by recent molecular works. A relaxed molecular clock dating approach provided a time framework for speciation events. We found that the Myomorpha clade shows a greater degree of variation in diversification rates than Sciuroidea, Caviomorpha, Castorimorpha and Anomaluromorpha. We identified a number of shifts in diversification rates within the major clades: two in Castorimorpha, three in Ctenohystrica, 6 within the squirrel-related clade and 24 in the Myomorpha clade. The majority of these shifts occurred within the most recent familial rodent radiations: the Cricetidae and Muridae clades. Using the topological imbalances and the time line we discuss the potential role of different diversification factors that might have shaped the rodents radiation. Conclusions The present glimpse on the diversification pattern of rodents can be used for further comparative meta-analyses. Muroid lineages have a greater degree of variation in their diversification rates than any other rodent group. Different topological signatures suggest distinct diversification processes among rodent lineages. In particular, Muroidea and Sciuroidea display widespread distribution and have undergone evolutionary and adaptive radiation on most of the continents. Our results show that rodents experienced shifts in diversification rate regularly through the Tertiary, but at different periods for each clade. A comparison between the rodent fossil record and our results suggest that extinction led to the loss of diversification signal for most of the Paleogene nodes.
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Affiliation(s)
- Pierre-Henri Fabre
- Center for Macroecology, Evolution and Climate (CMEC, Department of Biology), Zoological Museum, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark.
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91
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Irwin NR, Bayerlová M, Missa O, Martínková N. Complex patterns of host switching in New World arenaviruses. Mol Ecol 2012; 21:4137-50. [PMID: 22693963 DOI: 10.1111/j.1365-294x.2012.05663.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We empirically tested the long-standing hypothesis of codivergence of New World arenaviruses (NWA) with their hosts. We constructed phylogenies for NWA and all known hosts and used them in reconciliation analyses. We also constructed a phylogenetic tree of all Sigmodontinae and Neotominae rodents and tested whether viral-host associations were phylogenetically clustered. We determined host geographical overlap to determine to what extent opportunity to switch hosts was limited by host relatedness or physical proximity. With the exception of viruses from North America, no phylogenetically codivergent pattern between NWA and their hosts was found. We found that different virus clades were clustered differently and that Clade B with members pathogenic to humans was randomly distributed across the rodent phylogeny. Furthermore, viral relatedness within Clade B was significantly explained by the geographic overlap of their hosts' ranges rather than host relatedness, indicating that they are capable of host switching opportunistically. This has important bearings on their potential to become panzootic. Together, these analyses suggest that NWA have not codiverged with their hosts and instead have evolved predominantly via host switching.
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Affiliation(s)
- Nancy R Irwin
- Department of Biology, University of York, POBOX 373, York, YO10 5DD, UK.
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92
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Luna F, Roca P, Oliver J, Antenucci CD. Maximal thermogenic capacity and non-shivering thermogenesis in the South American subterranean rodent Ctenomys talarum. J Comp Physiol B 2012; 182:971-83. [PMID: 22614630 DOI: 10.1007/s00360-012-0675-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 04/23/2012] [Accepted: 04/30/2012] [Indexed: 10/28/2022]
Abstract
Subterranean rodents inhabit closed tunnel systems that are hypoxic and hypercapnic and buffer aboveground ambient temperature. In contrast to other strictly subterranean rodents, Ctenomys talarum exhibits activity on the surface during foraging and dispersion and hence, is exposed also to the aboveground environment. In this context, this species is a valuable model to explore how the interplay between underground and aboveground use affects the relationship among basal metabolic rate (BMR), cold-induced maximum metabolic rate (MMR), shivering (ST), and non-shivering thermogenesis (NST). In this work, we provide the first evidence of the presence of NST, including the expression of uncoupling proteins in brown adipose tissue (BAT), and shivering thermogenesis in Ctenomys talarum, a species belonging to the most numerous subterranean genus, endemic to South America. Our results show no differences in BMR, cold-induced MMR, and NST between cold- (15 °C) and warm- (25 °C) acclimated individuals. Furthermore, thermal acclimation had no effect on the expression of mitochondrial uncoupling protein 1 (UCP1) in BAT. Only cytochrome c oxidase (COX) content and activity increased during cold acclimation. When interscapular BAT was removed, NST decreased more than 30%, whereas cold-induced MMR remained unchanged. All together, these data suggest that cold-induced MMR reaches a maximum in warm-acclimated individuals and so a probable ceiling in NST and UCP1 expression in BAT. Possible thermogenic mechanisms explaining the increase in the oxidative capacity, mediated by COX in BAT of cold-acclimated individuals and the role of ST in subterranean life habits are proposed.
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Affiliation(s)
- Facundo Luna
- Laboratorio de Ecología Fisiológica y del Comportamiento, Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Mar del Plata, Mar del Plata, Argentina.
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93
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Clavijo-Baque S, Bozinovic F. Testing the fitness consequences of the thermoregulatory and parental care models for the origin of endothermy. PLoS One 2012; 7:e37069. [PMID: 22606328 PMCID: PMC3351390 DOI: 10.1371/journal.pone.0037069] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Accepted: 04/15/2012] [Indexed: 11/18/2022] Open
Abstract
The origin of endothermy is a puzzling phenomenon in the evolution of vertebrates. To address this issue several explicative models have been proposed. The main models proposed for the origin of endothermy are the aerobic capacity, the thermoregulatory and the parental care models. Our main proposal is that to compare the alternative models, a critical aspect is to determine how strongly natural selection was influenced by body temperature, and basal and maximum metabolic rates during the evolution of endothermy. We evaluate these relationships in the context of three main hypotheses aimed at explaining the evolution of endothermy, namely the parental care hypothesis and two hypotheses related to the thermoregulatory model (thermogenic capacity and higher body temperature models). We used data on basal and maximum metabolic rates and body temperature from 17 rodent populations, and used intrinsic population growth rate (R(max)) as a global proxy of fitness. We found greater support for the thermogenic capacity model of the thermoregulatory model. In other words, greater thermogenic capacity is associated with increased fitness in rodent populations. To our knowledge, this is the first test of the fitness consequences of the thermoregulatory and parental care models for the origin of endothermy.
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Affiliation(s)
- Sabrina Clavijo-Baque
- Departamento de Ecología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile.
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94
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Kruger JL, Patzke N, Fuxe K, Bennett NC, Manger PR. Nuclear organization of cholinergic, putative catecholaminergic, serotonergic and orexinergic systems in the brain of the African pygmy mouse (Mus minutoides): organizational complexity is preserved in small brains. J Chem Neuroanat 2012; 44:45-56. [PMID: 22554581 DOI: 10.1016/j.jchemneu.2012.04.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2012] [Revised: 04/16/2012] [Accepted: 04/16/2012] [Indexed: 11/16/2022]
Abstract
This study investigated the nuclear organization of four immunohistochemically identifiable neural systems (cholinergic, catecholaminergic, serotonergic and orexinergic) within the brain of the African pygmy mouse (Mus minutoides). The African pygmy mice studied had a brain mass of around 275 mg, making these the smallest rodent brains to date in which these neural systems have been investigated. In contrast to the assumption that in this small brain there would be fewer subdivisions of these neural systems, we found that all nuclei generally observed for these systems in other rodent brains were also present in the brain of the African pygmy mouse. As with other rodents previously studied in the subfamily Murinae, we observed the presence of cortical cholinergic neurons and a compactly organized locus coeruleus. These two features of these systems have not been observed in the non-Murinae rodents studied to date. Thus, the African pygmy mouse displays what might be considered a typical Murinae brain organization, and despite its small size, the brain does not appear to be any less complexly organized than other rodent brains, even those that are over 100 times larger such as the Cape porcupine brain. The results are consistent with the notion that changes in brain size do not affect the evolution of nuclear organization of complex neural systems. Thus, species belonging to the same order generally have the same number and complement of the subdivisions, or nuclei, of specific neural systems despite differences in brain size, phenotype or time since evolutionary divergence.
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Affiliation(s)
- Jean-Leigh Kruger
- School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown 2193, Johannesburg, South Africa
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95
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Avaria-Llautureo J, Hernández CE, Boric-Bargetto D, Canales-Aguirre CB, Morales-Pallero B, Rodríguez-Serrano E. Body size evolution in extant Oryzomyini rodents: Cope's rule or miniaturization? PLoS One 2012; 7:e34654. [PMID: 22509339 PMCID: PMC3318010 DOI: 10.1371/journal.pone.0034654] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 03/08/2012] [Indexed: 11/26/2022] Open
Abstract
At the macroevolutionary level, one of the first and most important hypotheses that proposes an evolutionary tendency in the evolution of body sizes is “Cope's rule". This rule has considerable empirical support in the fossil record and predicts that the size of species within a lineage increases over evolutionary time. Nevertheless, there is also a large amount of evidence indicating the opposite pattern of miniaturization over evolutionary time. A recent analysis using a single phylogenetic tree approach and a Bayesian based model of evolution found no evidence for Cope's rule in extant mammal species. Here we utilize a likelihood-based phylogenetic method, to test the evolutionary trend in body size, which considers phylogenetic uncertainty, to discern between Cope's rule and miniaturization, using extant Oryzomyini rodents as a study model. We evaluated body size trends using two principal predictions: (a) phylogenetically related species are more similar in their body size, than expected by chance; (b) body size increased (Cope's rule)/decreased (miniaturization) over time. Consequently the distribution of forces and/or constraints that affect the tendency are homogenous and generate this directional process from a small/large sized ancestor. Results showed that body size in the Oryzomyini tribe evolved according to phylogenetic relationships, with a positive trend, from a small sized ancestor. Our results support that the high diversity and specialization currently observed in the Oryzomyini tribe is a consequence of the evolutionary trend of increased body size, following and supporting Cope's rule.
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Affiliation(s)
- Jorge Avaria-Llautureo
- Laboratorio de Ecología Molecular & Filoinformática, Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Cristián E. Hernández
- Laboratorio de Ecología Molecular & Filoinformática, Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
- * E-mail:
| | - Dusan Boric-Bargetto
- Laboratorio de Ecología Molecular & Filoinformática, Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Cristian B. Canales-Aguirre
- Laboratorio de Ecología Molecular & Filoinformática, Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Bryan Morales-Pallero
- Laboratorio de Ecología Molecular & Filoinformática, Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
| | - Enrique Rodríguez-Serrano
- Laboratorio de Ecología Molecular & Filoinformática, Departamento de Zoología, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile
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96
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Zhang Q, Xia L, Kimura Y, Shenbrot G, Zhang Z, Ge D, Yang Q. Tracing the Origin and Diversification of Dipodoidea (Order: Rodentia): Evidence from Fossil Record and Molecular Phylogeny. Evol Biol 2012. [DOI: 10.1007/s11692-012-9167-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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97
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Durst PAP, Roth VL. Classification tree methods provide a multifactorial approach to predicting insular body size evolution in rodents. Am Nat 2012; 179:545-53. [PMID: 22437183 DOI: 10.1086/664611] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Many hypotheses have been proposed to explain size changes in insular mammals, but no single variable suffices to explain the diversity of responses, particularly within Rodentia. Here in a data set on insular rodents, we observe strong consistency in the direction of size change within islands and within species but (outside of Heteromyidae) little consistency at broader taxonomic scales. Using traits of islands and of species in a classification tree analysis, we find the most important factor predicting direction of change to be mainland body mass (large rodents decrease, small ones increase); other variables (island climate, number of rodent species, and area) were significant, although their roles as revealed by the classification tree were context dependent. Ecological interactions appear relatively uninformative, and on any given island, the largest and smallest rodent species converged or diverged in size with equal frequency. Our approach provides a promising framework for continuing examination of insular body size evolution.
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Affiliation(s)
- Paul A P Durst
- Biology Department, Duke University, Durham, North Carolina 27708, USA.
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98
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Favaron PO, Rodrigues MN, Oliveira MF, Biasi CM, Miglino MA. Embryonic and Fetal Development in - Pigmy Rice Rat - Oligoryzomys sp. (Rodentia, Sigmodontinae) and its Significance for Being a new Experimental Model. Anat Histol Embryol 2012; 41:286-99. [DOI: 10.1111/j.1439-0264.2012.01136.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2011] [Accepted: 12/01/2011] [Indexed: 11/28/2022]
Affiliation(s)
- P. O. Favaron
- Department of Surgery, Faculty of Veterinary Medicine and Animal Science; University of Sao Paulo; Sao Paulo; SP 05508-270; Brazil
| | - M. N. Rodrigues
- Department of Surgery, Faculty of Veterinary Medicine and Animal Science; University of Sao Paulo; Sao Paulo; SP 05508-270; Brazil
| | - M. F. Oliveira
- Department of Animal Science; Federal Rural of Semi Arid University; Mossoró; Rio Grande do Norte, 59625-900; Brazil
| | - C. M. Biasi
- Department of Surgery, Faculty of Veterinary Medicine and Animal Science; University of Sao Paulo; Sao Paulo; SP 05508-270; Brazil
| | - M. A. Miglino
- Department of Surgery, Faculty of Veterinary Medicine and Animal Science; University of Sao Paulo; Sao Paulo; SP 05508-270; Brazil
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99
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Badenhorst D, Dobigny G, Robinson TJ. Karyotypic evolution of hapalomys inferred from chromosome painting: a detailed characterization contributing new insights into the ancestral murinae karyotype. Cytogenet Genome Res 2012; 136:83-8. [PMID: 22222239 DOI: 10.1159/000335286] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2011] [Indexed: 11/19/2022] Open
Abstract
We report on the construction of a comparative chromosome map between the emblematic laboratory rat, Rattus norvegicus (RNO), and Delacour's Marmoset rat, Hapalomys delacouri (HDE), based on cross-species fluorescence in situ hybridization with R. norvegicus painting probes. Sixteen R. norvegicus chromosomes (RNO 3-6, 8, 10-15, 17-20, and X) were retained in their entirety (as a conserved block or as a single chromosome) in the H. delacouri genome. The remaining 5 R. norvegicus chromosomes (RNO 1, 2, 7, 9, and 16) produced 2 signals in the H. delacouri karyotype. Our analysis allowed the detection of an X-autosome translocation between RNO X and 11 that occurred convergently in an unrelated species, Bandicota savilei, and a single B chromosome that accounts for the 2n = 48 karyotype observed in this specimen. In total, the rat chromosome paints revealed 27 segments of conserved synteny in H. delacouri. The analysis showed 7 NOR bearing pairs in H. delacouri (HDE 1, 3, 6, 7, 8, 10, and 13) and the occurrence of an interstitial telomeric signal at the centromeric regions of 8 H. delacouri chromosomes (HDE 3, 10, 11, 12, 13, 16, 19, and 22). These data, together with published comparative maps, enabled a revision of the previously postulated murine ancestral condition suggesting that it probably comprised a wholly acrocentric karyotype with 2n = 46-50.
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Affiliation(s)
- D Badenhorst
- Evolutionary Genomics Group, University of Stellenbosch, Botany and Zoology Department, Stellenbosch, South Africa
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100
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Romanenko SA, Perelman PL, Trifonov VA, Graphodatsky AS. Chromosomal evolution in Rodentia. Heredity (Edinb) 2012; 108:4-16. [PMID: 22086076 PMCID: PMC3238120 DOI: 10.1038/hdy.2011.110] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 10/06/2011] [Accepted: 10/07/2011] [Indexed: 11/08/2022] Open
Abstract
Rodentia is the most species-rich mammalian order and includes several important laboratory model species. The amount of new information on karyotypic and phylogenetic relations within and among rodent taxa is rapidly increasing, but a synthesis of these data is currently lacking. Here, we have integrated information drawn from conventional banding studies, recent comparative painting investigations and molecular phylogenetic reconstructions of different rodent taxa. This permitted a revision of several ancestral karyotypic reconstructions, and a more accurate depiction of rodent chromosomal evolution.
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Affiliation(s)
- S A Romanenko
- Institute of Molecular and Cellular Biology, SB RAS, Novosibirsk, Russia.
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