Consulta: subjectFacets:"Evolution"
Registros recuperados: 176
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Diferencias en la aptitud entre colectas de "alpistillo" (Phalaris minos Retz.) resistentes y susceptible a inhibidores de la ACCasa.
Provedor de dados: 32
Autores: Torres García, Jesús Rubén.
Las malezas compiten intensamente con los cultivos, por lo cual, los agricultores emplean prácticas de control (manual, mecánico y químico) para eliminarlas. Los herbicidas ejercen una presión de selección extrema (99.99%) sobre las poblaciones. Como consecuencia, en unas pocas generaciones se observan individuos resistentes (R) en las poblaciones de maleza. La resistencia a herbicidas es un proceso evolutivo causado por cambios metabólicos o genéticos. En algunas especies la resistencia va acompañada de una disminución en la aptitud competitiva (fitness). Esto puede ocasionar que las plantas resistentes sean desplazadas cuando el factor de selección se retire de las poblaciones. Phalaris minor (Poaceae) es una maleza que evolucionó hacia la adquisición de...
Palavras-chave: Fitness; Costo de la resistencia; Evolución; Ecología evolutiva; Doctorado; Botánica; Cost of resistance; Evolution; Evolutionary ecology.
Ano: 2012
URL: http://hdl.handle.net/10521/1778

Change and Identity in Complex Systems
Provedor de dados: 7
Autores: Cumming, Graeme S; University of Florida; cummingg@wec.ufl.edu; Collier, John; University of KwaZulu-Natal; collierj@ukzn.ac.za.
Tipo: Peer-Reviewed Reports
Palavras-chave: Complexity; Resilience; Identity; Adaptive cycle; Limitation; Replacement; Random walk; Evolution; Ecosystem; Economy; Society; Social-ecological system; Metamodels.
Ano: 2005

WITHIN-POPULATION GENETIC DIVERSITY OF CLIMBING PLANTS AND TREES IN A TEMPERATE FOREST IN CENTRAL CHILE
Provedor de dados: 73
Autores: Torres-Díaz,Cristian; Ruiz,Eduardo; Salgado-Luarte,Cristian; Molina-Montenegro,Marco A; Gianoli,Ernesto.
The climbing habit is a key innovation in angiosperm evolution: climbing plant taxa have greater species richness than their non-climbing sister groups. It is considered that highly diversified clades should show increased among-population genetic differentiation. Less clear is the expected pattern regarding within-population genetic diversity in speciose lineages. We tested the hypothesis of greater within-population genetic diversity in climbing plants compared to trees in a temperate forest in central Chile. The assumption underlying this hypothesis is that higher among-population differentiation in climbers compared to trees should reflect higher genetic diversity as well. AFLP markers from 167 individual plants from 14 species (seven climbers and...
Tipo: Journal article
Palavras-chave: AFLP; Climbers; Evolution; Genetic variability; Key innovation.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432013000100005

PHYLOGENETIC RELATIONSHIPS AMONG CHILEAN SPECIES OF DRIMYS (WTNTERACEAE) BASED ON ITS SEQUENCES AND INSERTION/DELETION EVENTS
Provedor de dados: 73
Autores: Ruiz,Eduardo; Toro,Oscar; Crawford,Daniel J; Stuessy,Tod F; Negritto,María A; Baeza,Carlos; Becerra,José.
Phylogenetic relationships among Chilean species of Drimys as well asD. granadensis from Central America andD. angustifolia from Brazil were reconstructed using internal transcribed spacers (ITS) of nuclear ribosomal DNA and a parsimony analysis. Our results at the family level were congruent with previous phylogenetic hypotheses. Molecular data indicate that the Juan Fernandez Island endemic D. confertifolia diverged early in the evolution of the genus, and it is not closely related to the continental species D. winteri, as might be expected on the basis of morphology and biogeography. The ITS phytogeny also provides general support for a recent distribution of species on the western side of the Andes Mountains; the only exception is D. andina, which may...
Tipo: Journal article
Palavras-chave: Drimys; Evolution; ITS; Indels; Winteraceae.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432008000200008

Analysis of castor bean ribosome-inactivating proteins and their gene expression during seed development
Provedor de dados: 74
Autores: Loss-Morais,Guilherme; Turchetto-Zolet,Andreia Carina; Etges,Matheus; Cagliari,Alexandro; Körbes,Ana Paula; Maraschin,Felipe dos Santos; Margis-Pinheiro,Márcia; Margis,Rogério.
Ribosome-inactivating proteins (RIPs) are enzymes that inhibit protein synthesis after depurination of a specific adenine in rRNA. The RIP family members are classified as type I RIPs that contain an RNA-N-glycosidase domain and type II RIPs that contain a lectin domain (B chain) in addition to the glycosidase domain (A chain). In this work, we identified 30 new plant RIPs and characterized 18 Ricinus communis RIPs. Phylogenetic and functional divergence analyses indicated that the emergence of type I and II RIPs probably occurred before the monocot/eudicot split. We also report the expression profiles of 18 castor bean genes, including those for ricin and agglutinin, in five seed stages as assessed by quantitative PCR. Ricin and agglutinin were the most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agglutinin; Evolution; Lipase; Ricinus communis; Ricin; RIPs.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100011

Evo-devo of non-bilaterian animals
Provedor de dados: 74
Autores: Lanna,Emilio.
The non-bilaterian animals comprise organisms in the phyla Porifera, Cnidaria, Ctenophora and Placozoa. These early-diverging phyla are pivotal to understanding the evolution of bilaterian animals. After the exponential increase in research in evolutionary development (evo-devo) in the last two decades, these organisms are again in the spotlight of evolutionary biology. In this work, I briefly review some aspects of the developmental biology of nonbilaterians that contribute to understanding the evolution of development and of the metazoans. The evolution of the developmental genetic toolkit, embryonic polarization, the origin of gastrulation and mesodermal cells, and the origin of neural cells are discussed. The possibility that germline and stem cell...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Early-diverging metazoans; BMP; FGF; Wnt; Stem cells; Evolution; Nervous system.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300284

Searching for ancient balanced polymorphisms shared between Neanderthals and Modern Humans
Provedor de dados: 74
Autores: Viscardi,Lucas Henriques; Paixão-Côrtes,Vanessa Rodrigues; Comas,David; Salzano,Francisco Mauro; Rovaris,Diego; Bau,Claiton Dotto; Amorim,Carlos Eduardo G.; Bortolini,Maria Cátira.
Abstract Hominin evolution is characterized by adaptive solutions often rooted in behavioral and cognitive changes. If balancing selection had an important and long-lasting impact on the evolution of these traits, it can be hypothesized that genes associated with them should carry an excess of shared polymorphisms (trans- SNPs) across recent Homo species. In this study, we investigate the role of balancing selection in human evolution using available exomes from modern (Homo sapiens) and archaic humans (H. neanderthalensis and Denisovan) for an excess of trans-SNP in two gene sets: one associated with the immune system (IMMS) and another one with behavioral system (BEHS). We identified a significant excess of trans-SNPs in IMMS (N=547), of which six of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Human behavior; Evolution; Balancing selection; Immune genes; Behavioral genes.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000100067

Description of a ZZ/ZW sex chromosome system in Thoracocharax cf. stellatus (Teleostei, Characiformes, Gasteropelecidae)
Provedor de dados: 74
Autores: Carvalho,Margarida Lima; Oliveira,Claudio; Foresti,Fausto.
The family Gasteropelecidae is composed of three genera and eight species. This study shows that Thoracocharax cf. stellatus has 2n = 52 chromosomes for both sexes. The five males studied showed 8 metacentric, 16 submetacentric, 4 subtelocentric, and 24 acrocentric chromosomes; the seven females showed only one submetacentric chromosome, belonging to pair 11, and one extra acrocentric chromosome, smaller than all the other chromosomes, characterizing the presence of a ZZ/ZW sex chromosome system in this species. Nucleolus organizing regions (NORs) were detected on the short arms of the subtelocentric chromosome pair 13. Constitutive heterochromatin was identified at pericentromeric and terminal positions in almost all chromosomes. The W chromosome was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sex chromosomes; ZW; DNA content; Fish; Evolution.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000300008

The complete chloroplast genome sequences of three Spondias species reveal close relationship among the species
Provedor de dados: 74
Autores: Santos,Vanessa; Almeida,Cícero.
Abstract This study reports the complete chloroplast sequences of three Spondias species. The genome sequences were obtained for Spondias tuberosa, Spondias bahienses, and Spondias mombin using the Illumina sequencing technology by a combination of de novo methods and a reference-guided assembly using Sapindus mukorossi as reference. The genomes of S. tuberosa, S. bahiensis, and S. mombin had 162,036, 162,218, and 162,302 bp, respectively. The coding regions exhibited 130 genes, including 34–35 tRNAs and 4 rRNAs. The results revealed synteny among the genomes, with high conservation in the gene order and content and CG content. The inverted repeat regions (IRA and IRB) and the large and small single copies were very similar among the three genomes. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plastome; Evolution; Spondias.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000100132

Genome-wide analysis of the Glycerol-3-Phosphate Acyltransferase (GPAT) gene family reveals the evolution and diversification of plant GPATs
Provedor de dados: 74
Autores: Waschburger,Edgar; Kulcheski,Franceli Rodrigues; Veto,Nicole Moreira; Margis,Rogerio; Margis-Pinheiro,Marcia; Turchetto-Zolet,Andreia Carina.
Abstract sn-Glycerol-3-phosphate 1-O-acyltransferase (GPAT) is an important enzyme that catalyzes the transfer of an acyl group from acyl-CoA or acyl-ACP to the sn-1 or sn-2 position of sn-glycerol-3-phosphate (G3P) to generate lysophosphatidic acids (LPAs). The functional studies of GPAT in plants demonstrated its importance in controlling storage and membrane lipid. Identifying genes encoding GPAT in a variety of plant species is crucial to understand their involvement in different metabolic pathways and physiological functions. Here, we performed genome-wide and evolutionary analyses of GPATs in plants. GPAT genes were identified in all algae and plants studied. The phylogenetic analysis showed that these genes group into three main clades. While clades...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant lipids; GPAT enzymes; Phylogeny; Evolution; Gene expression.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200355

Polymorphism of Sooty-fronted Spinetail (Synallaxis frontalis Aves: Furnariidae): Evidence of chromosomal rearrangements by pericentric inversion in autosomal macrochromosomes
Provedor de dados: 74
Autores: Souza,Marcelo Santos de; Barcellos,Suziane Alves; Costa,Alice Lemos; Kretschmer,Rafael; Garnero,Analía Del Valle; Gunski,Ricardo José.
Abstract The Passeriformes is the most diverse and cytogenetically well-known clade of birds, comprising approximately 5,000 species. The sooty-fronted spinetail (Synallaxis frontalis Aves: Furnariidae) species, which belongs to the order Passeriformes, is typically found in South America, where it is widely distributed. Polymorphisms provide genetic variability, important for several evolutionary processes, including speciation and adaptation to the environment. The aim of this work was to analyze the possible cytotypes and systemic events involved in the species polymorphism. Of the sampled 19 individuals, two thirds were polymorphic, an event supposedly linked to mutations resulting from genomic evolution that can be transmitted hereditarily. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosomal polymorphism; Evolution; Cytogenetics.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000100062

Karyotype characterization of Trigona fulviventris Guérin, 1835 (Hymenoptera, Meliponini) by C banding and fluorochrome staining: report of a new chromosome number in the genus
Provedor de dados: 74
Autores: Domingues,Alayne Magalhães Trindade; Waldschmidt,Ana Maria; Andrade,Sintia Emmanuelle; Andrade-Souza,Vanderly; Alves,Rogério Marco de Oliveira; Silva Junior,Juvenal Cordeiro da; Costa,Marco Antônio.
Although many species of the genus Trigona have been taxonomically described, cytogenetic studies of these species are still rare. The aim of the present study was to obtain cytogenetic data by conventional staining, C banding and fluorochrome staining for the karyotype characterization of the species Trigona fulviventris. Cytogenetic analysis revealed that this species possesses a diploid chromosome number of 2n = 32, different from most other species of this genus studied so far. This variation was probably due to the centric fusion in a higher numbered ancestral karyotype, this fusion producing the large metacentric chromosome pair and the lower chromosome number observed in Trigona fulviventris. Heterochromatin was detected in the pericentromeric...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Cytogenetics; Heterochromatin; Evolution; Stingless bees.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000300009

Nuclear DNA content determination in Characiformes fish (Teleostei, Ostariophysi) from the Neotropical region
Provedor de dados: 74
Autores: Carvalho,Margarida Lima; Oliveira,Claudio; Navarrete,Maria Clara; Froehlich,Otávio; Foresti,Fausto.
In the present study, nuclear DNA content was analyzed in 53 species of Characiformes fish from the Neotropical region. Diploid number ranged from 2n = 48 in Astyanax fasciatus, Gymnocorymbus ternetzi and Hyphessobrycon griemi to 2n = 102 in Potamorhina squamoralevis, with a modal number of 54 chromosomes. Nuclear DNA content ranged from 1.70 ± 0.04 pg of DNA per diploid nucleus in Acestrorhynchus pantaneiro to 3.94 ± 0.09 pg in Tetragonopterus chalceus. A general analysis showed a mean value of 2.9 pg of DNA per diploid nucleus. Very similar DNA content values were observed in the species of the family Cynodontidae which showed a variation of 3% between the two genera studied. Small variations were observed between populations of Gymnocorymbus ternetzi,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nuclear DNA; DNA content; Chromosome; Fish; Evolution.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000100010

Methods for detection of horizontal transfer of transposable elements in complete genomes
Provedor de dados: 74
Autores: Carvalho,Marcos Oliveira de; Loreto,Elgion L.S.
Recent advances in nucleic acid sequencing technology are creating a diverse landscape for the analysis of horizontal transfer in complete genomes. Previously limited to prokaryotes, the availability of complete genomes from close eukaryotic species presents an opportunity to validate hypotheses about the patterns of evolution and mechanisms that drive horizontal transfer. Many of those methods can be transported from methods previously used in prokaryotic genomes, as the assumptions for horizontal transfer can be interpreted as the same. Some methods, however, require a complete adaptation, while others need refinements in sensitivity and specificity to deal with the huge datasets generated from next-generation sequencing technologies. Here we list the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Transposable element; Horizontal transfer; Genome; Computational analysis; Evolution.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600024

Intrachromosomal karyotype asymmetry in Orchidaceae
Provedor de dados: 74
Autores: Medeiros-Neto,Enoque; Nollet,Felipe; Moraes,Ana Paula; Felix,Leonardo P.
Abstract The asymmetry indexes have helped cytotaxonomists to interpret and classify plant karyotypes for species delimitation efforts. However, there is no consensus about the best method to calculate the intrachromosomal asymmetry. The present study aimed to compare different intrachromosomal asymmetry indexes in order to indicate which are more efficient for the estimation of asymmetry in different groups of orchids. Besides, we aimed to compare our results with the Orchidaceae phylogenetic proposal to test the hypothesis of Stebbins (1971). Through a literature review, karyotypes were selected and analyzed comparatively with ideal karyotypes in a cluster analysis. All karyotypes showed some level of interchromosomal asymmetry, ranging from slightly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asymmetry index; Karyotype symmetry; Chromosome; Cytogenetic; Evolution.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000400610

Phylogenomic and single nucleotide polymorphism analyses revealed the hybrid origin of Spondias bahiensis (family Anacardiaceae): de novo genome sequencing and comparative genomics
Provedor de dados: 74
Autores: Nobre,Lydayanne Lilás de Melo; Santos,José Daniel Oliveira dos; Leite,Rychard; Almeida,Cícero.
Abstract The genus Spondias (family Anacardiaceae) comprises 19 taxa, ten of which occur in Neotropical regions. Spondias bahiensis has been suggested to be a hybrid, although initial evidence does not support this hypothesis. The aim of this study was to test the hypothesis of the hybrid origin of S. bahiensis using high-throughput sequencing with single nucleotide polymorphism (SNP) analysis, characterization of intragenomic nuclear ribosomal DNA (nrDNA), and nuclear and chloroplast phylogenomic analyses. The SNP analysis revealed a high number of SNPs in the S. bahiensis genome, and with respect to nrDNA, S. bahiensis shared approximately half of the SNP alleles with S. tuberosa, but not with S. mombin. Combining the SNP analysis with nrDNA phylogeny...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RDNA; Phylogenetics; Evolution; Hybrid offspring.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000500878

Molecular evolution of HoxA13 and the multiple origins of limbless morphologies in amphibians and reptiles
Provedor de dados: 74
Autores: Singarete,Marina E.; Grizante,Mariana B.; Milograna,Sarah R.; Nery,Mariana F.; Kin,Koryu; Wagner,Günter P.; Kohlsdorf,Tiana.
Developmental processes and their results, morphological characters, are inherited through transmission of genes regulating development. While there is ample evidence that cis-regulatory elements tend to be modular, with sequence segments dedicated to different roles, the situation for proteins is less clear, being particularly complex for transcription factors with multiple functions. Some motifs mediating protein-protein interactions may be exclusive to particular developmental roles, but it is also possible that motifs are mostly shared among different processes. Here we focus on HoxA13, a protein essential for limb development. We asked whether the HoxA13 amino acid sequence evolved similarly in three limbless clades: Gymnophiona, Amphisbaenia and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Development; Evolution; HoxA13; Molecular signatures; Limblessness.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300255

Nuclear DNA content in 20 species of Siluriformes (Teleostei: Ostariophysi) from the Neotropical region
Provedor de dados: 74
Autores: Fenerich,Paulo César; Foresti,Fausto; Oliveira,Claudio.
In the present study, 20 species of Siluriformes fish were analyzed in order to determine their nuclear DNA content and compare these data with their diploid number. In addition, the extension and importance of the changes that occurred during the process of diversification in the group of Neotropical freshwater catfish were investigated. The only species studied of the family Doradidae, Rhinodoras d'orbignyi (2n = 58), presented 3.46 ± 0.13 pg of DNA. Among the species of the family Heptapteridae, the values of nuclear DNA content and the diploid numbers ranged from 1.13 ± 0.09 pg of DNA in Pimelodella sp. (2n = 46) to 2.38 ± 0.07 pg of DNA in Imparfinis mirini (2n = 58). The family Loricariidae showed the widest variation in diploid number and nuclear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nuclear DNA; DNA content; Chromosome; Fish; Evolution.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300008

Some AFLP amplicons are highly conserved DNA sequences mapping to the same linkage groups in two F2 populations of carrot
Provedor de dados: 74
Autores: Santos,Carlos A.F.; Simon,Philipp W.
Amplified fragment length polymorphism (AFLP) is a fast and reliable tool to generate a large number of DNA markers. In two unrelated F2 populations of carrot (Daucus carota L.), Brasilia x HCM and B493 x QAL (wild carrot), it was hypothesized that DNA 1) digested with the same restriction endonuclease enzymes and amplified with the same primer combination and 2) sharing the same position in polyacrylamide gels should be conserved sequences. To test this hypothesis AFLP fragments from polyacrylamide gels were eluted, reamplified, separated in agarose gels, purified, cloned and sequenced. Among thirty-one paired fragments from each F2 population, twenty-six had identity greater than 91% and five presented identity of 24% to 44%. Among the twenty-six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota; Evolution; Molecular markers; SCAR.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200013

Cyanobacterial nitrogenases: phylogenetic diversity, regulation and functional predictions
Provedor de dados: 74
Autores: Esteves-Ferreira,Alberto A.; Cavalcanti,João Henrique Frota; Vaz,Marcelo Gomes Marçal Vieira; Alvarenga,Luna V.; Nunes-Nesi,Adriano; Araújo,Wagner L.
Abstract Cyanobacteria is a remarkable group of prokaryotic photosynthetic microorganisms, with several genera capable of fixing atmospheric nitrogen (N2) and presenting a wide range of morphologies. Although the nitrogenase complex is not present in all cyanobacterial taxa, it is spread across several cyanobacterial strains. The nitrogenase complex has also a high theoretical potential for biofuel production, since H2 is a by-product produced during N2 fixation. In this review we discuss the significance of a relatively wide variety of cell morphologies and metabolic strategies that allow spatial and temporal separation of N2 fixation from photosynthesis in cyanobacteria. Phylogenetic reconstructions based on 16S rRNA and nifD gene sequences shed light on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyanobacteria; Evolution; Hydrogen; Nitrogen fixation; Molecular phylogeny.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200261

Trends in evolution of 5S rRNA of deuterostomes: bases and homogeneous clusters
Provedor de dados: 74
Autores: Subacius,Sandra Maria Rodrigues; Guimarães,Romeu Cardoso.
Evolution of metazoan 5S rRNA sequences was analyzed through base composition and types, location and frequency of clustered bases. Characters from sequences of protostomes did not show regular trends as compared with paleontology dating or organism complexity. Trends of increasing G and C, stronger in G clusters, and decreasing A and U, were detected in deuterostomes, in parallel with evolution of complexity. The multifunctional domain 71-104 was highlighted among conserved stretches. Clusters of C were typical of helices. Those of G were longer, extending from helices into loops or related to bulges, which is suggestive of functional significance. Deuterostomian trends were installed early in the lineage and reached full development in aquatic organisms,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ribosomal RNA; Evolution; Repetitive sites; Deuterostomes; Protostomes.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000300006

Extinction and emergence of genomic haplotypes during the evolution of Avian coronavirus in chicken embryos
Provedor de dados: 74
Autores: Brandão,Paulo E.; Hora,Aline S.; Silva,Sheila O. S.; Taniwaki,Sueli A.; Berg,Mikael.
Abstract Avian coronavirus (AvCoV) is ubiquitously present on poultry as a multitude of virus lineages. Studies on AvCoV phenotypic traits are dependent on the isolation of field strains in chicken embryonated eggs, but the mutant spectrum on each isolate is not considered. This manuscript reports the previously unknown HTS (high throughput sequencing)-based complete genome haplotyping of AvCoV isolates after passages of two field strains in chicken embryonated eggs. For the first and third passages of strain 23/2013, virus loads were 6.699 log copies/ μL and 6 log copies/ μL and, for 38/2013, 5.699 log copies/μL and 2.699 log copies/μL of reaction, respectively. The first passage of strain 23/2013 contained no variant haplotype, while, for the third...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian coronavirus; Haplotype; Mutant spectrum; NGS; Evolution.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400202

Low cytomolecular diversification in the genus Stylosanthes Sw. (Papilionoideae, Leguminosae)
Provedor de dados: 74
Autores: Franco,Ana Luiza; Figueredo,Amanda; Pereira,Lívia de Moraes; Sousa,Saulo Marçal de; Souza,Gustavo; Carvalho,Marcelo Ayres; Simon,Marcelo F.; Viccini,Lyderson Facio.
Abstract Stylosanthes (Papilionoideae, Leguminosae) is a predominantly Neotropical genus with ~48 species that include worldwide important forage species. This study presents the chromosome number and morphology of eight species of the genus Stylosanthes (S. acuminata, S. gracilis, S. grandifolia, S. guianensis, S. hippocampoides, S. pilosa, S. macrocephala, and S. ruellioides). In addition, staining with CMA and DAPI, in situ hybridization with 5S and 35S rDNA probes, and estimation of DNA content were performed. The interpretation of Stylosanthes chromosome diversification was anchored by a comparison with the sister genus Arachis and a dated molecular phylogeny based on nuclear and plastid loci. Stylosanthes species showed 2n = 20, with low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis; Cytogenetics; Evolution; Leguminosae; Stylosanthes.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100306

Mitochondrial genomes of genus Atta (Formicidae: Myrmicinae) reveal high gene organization and giant intergenic spacers
Provedor de dados: 74
Autores: Barbosa,Josefa T. V.; Barbosa,Marcílio S.; Morais,Suzyane; Santana,Antônio E. G.; Almeida,Cicero.
Abstract The ants of the genus Atta are considered important pests to agriculture in the Americas, although Atta species are also important contributors to ecosystem functions in the various habitats in which they occur. The aim of this study was to assemble four complete mitochondrial genomes of the genus Atta, construct the phylogenomic tree, and analyze the gene content, order, and organization. The mitogenomes of A. colombica, A. opaciceps, A. texana, and A. sexdens rubropilosa comprise 18,392, 19,257, 19,709, and 19,748 bp, respectively. The four Atta mitogenomes showed the charactistics typical of those of insects, with 13 protein-coding genes, 22 tRNAs, and 2 rRNAs, with genes displayed in the conventional order. Analysis for intergenic spacer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ants; Evolution; Mitogenomes.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000500801

Characterization and expression of the ABC family (G group) in ‘Dangshansuli’ pear (Pyrus bretschneideri Rehd.) and its russet mutant
Provedor de dados: 74
Autores: Hou,Zhaoqi; Jia,Bing; Li,Fei; Liu,Pu; Liu,Li; Ye,Zhenfeng; Zhu,Liwu; Wang,Qi; Heng,Wei.
Abstract The plant genes encoding ABCGs that have been identified to date play a role in suberin formation in response to abiotic and biotic stress. In the present study, 80 ABCG genes were identified in ‘Dangshansuli’ Chinese white pear and designated as PbABCGs. Based on the structural characteristics and phylogenetic analysis, the PbABCG family genes could be classified into seven main groups: classes A-G. Segmental and dispersed duplications were the primary forces underlying the PbABCG gene family expansion in ‘Dangshansuli’ pear. Most of the PbABCG duplicated gene pairs date to the recent whole-genome duplication that occurred 30~45 million years ago. Purifying selection has also played a critical role in the evolution of the ABCG genes. Ten PbABCG...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pear; Russet mutant; ABCG; Evolution; Gene expression.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000100137

Cytogenetic analysis of five Hypostomus species (Siluriformes, Loricariidae)
Provedor de dados: 74
Autores: Martinez,Emanuel Ricardo Monteiro; Zawadzki,Claudio Henrique; Foresti,Fausto; Oliveira,Claudio.
In this work, we analyzed the karyotypes of five species. Hypostomus cf. heraldoi, from the Mogi-Guaçu River, had 2n = 72 chromosomes, with a nucleolar organizer region (NOR) in one chromosomal pair. Hypostomus regani, from the Mogi-Guaçu River had 2n = 72 chromosomes with NORs in two chromosomal pairs. Hypostomus sp., from the Mogi-Guaçu River basin, had 2n = 68 chromosomes, with NORs in two chromosomal pairs. Hypostomus aff. agna, from Cavalo Stream, had 2n = 74 chromosomes with NORs in two chromosomal pairs. Hypostomus cf. topavae, from Carrapato Stream, had 2n = 80 chromosomes, with NORs in two chromosomal pairs. Hypostomus species showed marked diversity in the karyotypic formula, which suggested the occurrence of several Robertsonian rearrangements...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosomes; Evolution; Hypostominae; Neotropical fish; NOR.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400006

Les agricultures familiales du sertao en mouvement.
Provedor de dados: 14
Autores: SABOURIN, E.; CARON, P.
Les réalités de I'agriculture familiale nordestine sont plurielles. Contrairement aux discours dominants, qui évoquent invariablement· le petit producteur et son immobilisme, les agricultures familiales connaissent de p rofondes mutations techniques, économiques et sociales. Les résultats des travaux présentés dans cet ouvrage confirment combien les mots d'ordre développementalistes correspondent à des perceptions idéologiques ou déformées de Ia réalité. A leur façon, les connaissances produites cherchent ici à corriger les représentations figées qui prévalent trop souvent.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Evolucao; Desenvolvimento; Sertao; Familiar farms; Development; Brasil; Nordeste; Semiarid region; Agricultura Familiar; Evolution.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134417

Diversite et trajectoires d'evolution des exploitations.
Provedor de dados: 14
Autores: CARON, P.
Valorisation de la rnain-d'ceuvre familiale et autonomie de gestion des moyens de production sont les deux principales caractéristiques de l'agriculture familiale, qui font de I'exploitation agricole familiale un niveau d'organisation majeur. C'est à ce niveau que les producteurs définissent, pour eux et pour les leurs, des objectifs en fonction de Ia perception qu'ils ont de leur environnement et de leur situation dans cet environnement. C'est aussi à ce niveau qu'ils mobilisent, organisent et gerent les moyens de production, et qu'ils choisissent d'affecter les fruits de leur travail à l'investissement, à la consommation ou à I'épargne. Le petit producteur est depuis les années 80 l'objet de multiples attentions de Ia part des institutions publiques de...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Diversidade; Trajetoria; Evolucao; Organizacao; Tipificacao; Brasil; Nordeste; Bahia; Massaroca; Pintadas; Familiar farms; Diversity; Trajectory; Development; Organization; Northeast; Agricultura Familiar; Classification; Evolution; Brazil.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134408

Débits fluviaux. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Dubois, Aurélie.
Tipo: Text
Palavras-chave: Méditerranée; Débits fluviaux; Evolution; Le Rhône.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44109/43680.pdf

Contrasting selective patterns across the segmented genome of bluetongue virus in a global reassortment hotspot
Provedor de dados: 5
Autores: Jacquot, Maude; Rao, Pavuluri P.; Yadav, Sarita; Nomikou, Kyriaki; Maan, Sushila; Jyothi, Y. Krishna; Reddy, Narasimha; Putty, Kalyani; Hemadri, Divakar; Singh, Karam P.; Maan, Narender Singh; Hegde, Nagendra R.; Mertens, Peter; Biek, Roman.
For segmented viruses, rapid genomic and phenotypic changes can occur through the process of reassortment, whereby co-infecting strains exchange entire segments creating novel progeny virus genotypes. However, for many viruses with segmented genomes, this process and its effect on transmission dynamics remain poorly understood. Here, we assessed the consequences of reassortment for selection on viral diversity through time using bluetongue virus (BTV), a segmented arbovirus that is the causative agent of a major disease of ruminants. We analysed ninety-two BTV genomes isolated across four decades from India, where BTV diversity, and thus opportunities for reassortment, are among the highest in the world. Our results point to frequent reassortment and...
Tipo: Text
Palavras-chave: Bluetongue virus; Evolution; Reassortment; India; Selection.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00667/77882/80042.pdf

The contrasted evolutionary fates of deep-sea chemosynthetic mussels (Bivalvia, Bathymodiolinae)
Provedor de dados: 5
Autores: Thubaut, Justine; Puillandre, Nicolas; Faure, Baptiste; Cruaud, Corinne; Samadi, Sarah.
Bathymodiolinae are giant mussels that were discovered at hydrothermal vents and harboring chemosynthetic symbionts. Due to their close phylogenetic relationship with seep species and tiny mussels from organic substrates, it was hypothesized that they gradually evolved from shallow to deeper environments, and specialized in decaying organic remains, then in seeps, and finally colonized deep-sea vents. Here, we present a multigene phylogeny that reveals that most of the genera are polyphyletic and/or paraphyletic. The robustness of the phylogeny allows us to revise the genus-level classification. Organic remains are robustly supported as the ancestral habitat for Bathymodiolinae. However, rather than a single step toward colonization of vents and seeps,...
Tipo: Text
Palavras-chave: Bathymodiolinae; Chemosynthetic ecosystem; Deep-sea; Evolution.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00218/32957/31622.pdf

A World for Reactive Phenotypes
Provedor de dados: 5
Autores: Geoffroy, Benjamain; Alfonso, Sebastien; Sadoul, Bastien; Blumstein, Daniel T.
Humans currently occupy all continents and by doing so, modify the environment and create novel threats to many species; a phenomenon known as human-induced rapid environmental changes (HIREC). These growing anthropogenic disturbances represent major and relatively new environmental challenges for many animals, and invariably alter selection on traits adapted to previous environments. Those species that survive often have moved from their original habitat or modified their phenotype through plasticity or genetic evolution. Based on the most recent advances in this research area, we predict that wild individuals with highly plastic capacities, relatively high basal stress level, and that are generally shy—in other words, individuals displaying a reactive...
Tipo: Text
Palavras-chave: Coping style; Antipredator behavior; Evolution; Stress physiology; Ecology; Predation; Urbanization; Pollution.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00664/77564/79528.pdf

Contribution à l'évaluation et à l'évolution de la puissance de pêche des fileyeurs français
Provedor de dados: 5
Autores: Morizur, Yvon; Carn, Nolwenn.
En l'absence de données fines sur l'effort de pêche des fileyeurs, on prend couramment la journée de pêche comme unité d'effort. C'est le niveau disponible pour tous les bateaux. Lorsque l'on prend la journée de pêche comme unité d'effort dans le fileyage, l'on se réfère à une unité de temps qui comporte des opérations de levage et parfois de filage et de levage, et la puissance de pêche dépendra principalement des quantités de filets levés, la durée d'immersion étant un facteur peu variable dans une même pêcherie. Cette étude vise à étudier l'influence de ce facteur sur la puissance de pêche et à étudier le lien avec des paramètres physiques connus. Les analyses effectuées montrent que, pour les années 1996-97, les quantités de filets sont dépendantes de...
Tipo: Text
Palavras-chave: Hake; Sole; Anglerfish; Spider crab; Length of nets; Evolution; Fishing power; Fishing effort; Fixed nets; Merlu; Baudroie; Sole; Araignée; Evolution; Puissance de pêche; Longueur des filets; Effort de pêche; Filets fixes.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1243.pdf

Retombées atmosphériques en substances dangereuses. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Retombées atmosphériques; Substances dangereuses; Métaux lourds; Polluants organiques persistants; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44050/43621.pdf

AMP-deaminase in elasmobranch fish: A comparative histochemical and enzymatic study
Provedor de dados: 5
Autores: Thebault, Marie-t; Izem, Lahoucine; Leroy, Jean Paul; Gobin, Eric; Charrier, Gregory; Raffin, Jean-paul.
AMP-deaminase activity was measured in white muscle from a wide range of fish, including one cyclostome, 13 chondrosteans, and one teleost to elucidate the pattern of the AMP-deaminase activity in white muscle of fish. Compared to a mammalian (rat) muscle extract, low enzyme activities are found in the cyclostome and two elasmobranchs from two families (Scyliorhinidae, Hexanchidae). In contrast, higher AMP-deaminase activities, similar to mammals, are expressed in Squalidae, all families of skates, Chimaeridae and in the teleostean fish. We then compared AMP-deaminase activities in red and white muscles from two representative elasmobranch fish, the dogfish (Scyliorhinus canicula) and the thornback ray (Raja clavata). The fibre type composition and...
Tipo: Text
Palavras-chave: White fibres; Red fibres; Muscle; Histology; Fish; Evolution; Elasmobranch; AMP deaminase.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-635.pdf

Répartition spatio-temporelle des nutriments. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Sourisseau, Marc; Rogé, Marine.
Tipo: Text
Palavras-chave: Mers celtiques; Nutriments; Répartition spatio-temporelle; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43930/79224.pdf

Progression de l'organisation phragmale du metamere thoracique de quelques malacostraces
Provedor de dados: 5
Autores: Casanova, B; Huguet, D; Secretan, S.
A comparison of the skeleton of a successive thoracic segment in various Malacostraca shows the development and growing complexity of phragmal structure. It first appears in some Mysicacea and in Euphausiacea by means of an interarthrodial lamina issued from sternite. In Decapoda, Penaidae, Atyidae, Processidae, Palaemonidae, this lamina is diversified and some elements from pleural origin join it. The beginning of the so constituted wall considerably increases in Nephropidae and becomes ramified.
Tipo: Text
Palavras-chave: Nephropidae; Palaemonidae; Processidae; Atyidae; Penaeidae; Decapoda; Euphausiidae; Mysidacea; Malacostraca; Evolution.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1378.pdf

Qualité microbiologique des coquillages destinés à la consommation humaine : contamination des coquillages par Escherichia coli. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Amouroux, Isabelle.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Coquillages; Escherichia coli; Contamination; Réglementation; Qualité microbiologique; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44060/43631.pdf

Retombées atmosphériques en nutriments. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Retombées atmosphériques; Nutriments; Azote; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44057/43628.pdf

When forms meet genes: revision of the scleractinian genera Micromussa and Homophyllia (Lobophylliidae) with a description of two new species and one new genus
Provedor de dados: 5
Autores: Arrigoni, Roberto; Benzoni, Francesca; Huang, Danwei; Fukami, Hironobu; Chen, Chaolun Allen; Berumen, Michael L.; Hoogenboom, Mia; Thomson, Damian P.; Hoeksema, Bert W.; Budd, Ann F.; Zayasu, Yuna; Terraneo, Tullia I.; Kitano, Yuko F.; Baird, Andrew H.
The scleractinian family Lobophylliidae is undergoing a major taxonomic revision thanks to the combination of molecular and morphological data. In this study, we investigate the evolutionary relationships and the macro- and micromorphology of six nominal coral species belonging to two of the nine molecular clades of the Lobophylliidae, clades A and B, and of Symphyllia wilsoni, a lobophylliid species analyzed from a molecular point of view for the first time. Sequence data from mitochondrial DNA (COI and the intergenic spacer between COI and l-rRNA), and nuclear DNA (histone H3 and ITS region) are used to generate robust molecular phylogenies and a median-joining haplotype network. Molecular results are strongly in agreement with detailed observations of...
Tipo: Text
Palavras-chave: Coral; Evolution; Phylogeny; Systematics; Taxonomy.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00585/69699/67565.pdf

Retombées atmosphériques en substances dangereuses. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Mers celtiques; Retombées atmosphériques; Substances dangereuses; Métaux lourds; Polluants organiques persistants; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43968/43540.pdf

Impact of barrier layer on winter-spring variability of the southeastern Arabian Sea
Provedor de dados: 5
Autores: Masson, S; Luo, Jj; Madec, G; Vialard, Jerome; Durand, F; Gualdi, S; Guilyardi, E; Behera, S; Delecluse, P; Navarra, A; Yamagata, T.
In the present study, we use a coupled model to evaluate the effect of shallow salinity stratification on the sea surface temperature (SST) and on the monsoon onset in the southeastern Arabian Sea (SEAS). A 100-year control experiment shows that the coupled model reproduces the main climatic features in this region in terms of SST, precipitation and barrier layer (BL). A 100-year sensitivity experiment (where BL effects have been suppressed in the SEAS) shows that BL enhances the spring SST warming by 0.5 degrees C, and leads to a statistically significant increase of precipitation in May (3 mm/day) linked to an early (10 to 15 days) monsoon onset. This suggests that the BL extent may be a useful predictor of the summer monsoon onset in the area with a...
Tipo: Text
Palavras-chave: Summer monsoon season; Surface temperature; Indian ocean; Mixed layer; Northeast monsoon; Southwest monsoon; Onset vortex; Coupled GCM; Mechanisms; Evolution.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00203/31422/29819.pdf

Répartition spatio-temporelle des nutriments. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Sourisseau, Marc; Roge, Marine.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Nutriments; Répartition spatio-temporelle; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44008/79201.pdf

Diagnosis of vibriosis in the era of genomics: lessons from invertebrates
Provedor de dados: 5
Autores: Le Roux, Frederique.
Global changes linked to increases in temperature and ocean acidification, but also to more direct anthropogenic influences such as aquaculture, have caused a worldwide increase in the reports of Vibrio-associated illnesses affecting humans and also animals such as shrimp and molluscs. Investigation of the emergence of Vibrio pathogenesis events requires the analysis of microbial evolution at the gene, genome and population levels, in order to identify genomic modifications linked to increased virulence, resistance and/or prevalence, or to recent host shift. From a more applied point of view, the elucidation of virulence mechanisms is a prerequisite to devising prophylactic methods to fight infectious agents. In comparison with human pathogens, fairly...
Tipo: Text
Palavras-chave: Écologie; Émergence; Évolution; Invertébrés marins; Vibriose; Virulence; Ecology; Emergence; Evolution; Marine invertebrate; Vibriosis; Virulence.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00344/45560/46722.pdf

Répartition spatio-temporelle des nutriments. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Sourisseau, Marc; Rogé, Marine.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Nutriments; Répartition spatio-temporelle; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43826/80857.pdf

Qualité des eaux de baignade. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Méditerranée; Eaux de baignade; Réglementation; Qualité; Pollution; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44242/43811.pdf

Débits fluviaux. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Dubois, Aurélie.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Débits fluviaux; Evolution; La Seine.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43819/43393.pdf

Etude des facteurs de transcription impliqués dans l’accumulation lipidique en condition de stress azoté chez la microalgue haptophyte Isochrysis affinis galbana
Provedor de dados: 5
Autores: Thiriet-rupert, Stanislas.
In every organism, evolution and acclimation to environmental changes are orchestrated by numerous molecular players. Among them, transcription factors (TFs) play a crucial role by regulating gene expression. Therefore, identify TFs involved in the production of high value products is a significant step in a biotechnological context. The laboratory has at its disposal a mutant strain of the haptophyte microalga Tisochrysis lutea producing twice more storage lipids than the wild type strain when exposed to nitrogen deprivation. Given the key role of TFs in phenotype establishment, this PhD aim at identify the TFs involved in that of the mutant phenotype of T. lutea. A TFs identification and classification pipeline was elaborated and applied to T. lutea’s...
Tipo: Text
Palavras-chave: Bioinformatique; Biologie moléculaire; Évolution; Facteur de transcription; Micro-algue; Réseau de gènes; RNA-seq; Bioinformatic; Evolution; Gene network; Molecular biology; Microalgae; RNAseq; Transcription factor.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00371/48233/48368.pdf

Qualité des eaux de baignade. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Eaux de baignade; Réglementation; Qualité; Pollution; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43872/43446.pdf

How could fully scaled carps appear in natural waters in Madagascar?
Provedor de dados: 5
Autores: Hubert, Jean-noel; Allal, Francois; Hervet, Caroline; Ravakarivelo, Monique; Jeney, Zsigmond; Vergnet, Alain; Guyomard, Rene; Vandeputte, Marc.
The capacity of organisms to rapidly evolve in response to environmental changes is a key feature of evolution, and studying mutation compensation is a way to evaluate whether alternative routes of evolution are possible or not. Common carps (Cyprinus carpio) carrying a homozygous loss-of-function mutation for the scale cover gene fgfr1a1, causing the 'mirror' reduced scale cover, were introduced in Madagascar a century ago. Here we show that carps in Malagasy natural waters are now predominantly covered with scales, though they still all carry the homozygous mutation. We also reveal that the number of scales in mutated carps is under strong polygenic genetic control, with a heritability of 0.49. As a whole, our results suggest that carps submitted to...
Tipo: Text
Palavras-chave: Evolution; Mutation compensation; Heritability.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00356/46681/46725.pdf

Qualité des eaux de baignade. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Eaux de baignade; Réglementation; Qualité; Pollution; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44059/43630.pdf

Retombées atmosphériques en nutriments. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Mers celtiques; Retombées atmosphériques; Nutriments; Azote; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/43974/43546.pdf

Long-range PCR and high-throughput sequencing of Ostreid herpesvirus 1 indicate high genetic diversity and complex evolution process
Provedor de dados: 5
Autores: Bai, Chang-ming; Morga, Benjamin; Rosani, Umberto; Shi, Jie; Li, Chen; Xin, Lu-sheng; Wang, Chong-ming.
Ostreid herpesvirus 1 (OsHV-1) is an important pathogen associated with mass mortalities of cultivated marine mollusks worldwide. Since no cell line allows OsHV-1 replication in vitro, it is difficult to isolate enough high-purity viral DNA for High-Throughput Sequencing (HTS). We developed an efficient approach for the enrichment of OsHV-1 DNA for HTS with long-range PCR. Twenty-three primer pairs were designed to cover 99.3% of the reference genome, and their performances were examined on ten OsHV-1 infected samples. Amplicon mixtures from six successfully amplified samples were sequenced with Illumina platform, and one of them (ZK0118) was also sequenced with the PacBio platform. PacBio reads were assembled into 2 scaffolds compared to 9−68 scaffolds...
Tipo: Text
Palavras-chave: Long-range PCR; OsHV-1; High-throughput sequencing; Evolution; Diversity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00464/57566/64184.pdf

Retombées atmosphériques en nutriments. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Méditerranée; Retombées atmosphériques; Nutriments; Azote; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44240/43809.pdf

Evolutionary and Cardio‐Respiratory Physiology of Air‐breathing and Amphibious Fishes
Provedor de dados: 5
Autores: Damsgaard, Christian; Baliga, Vikram B.; Bates, Eric; Burggren, Warren; Mckenzie, David; Taylor, Edwin; Wright, Patricia A.
Air‐breathing and amphibious fishes are essential study organisms to shed insight into the required physiological shifts that supported the full transition from aquatic water‐breathing fishes to terrestrial air‐breathing tetrapods. While the origin of air‐breathing in the evolutionary history of the tetrapods has received considerable focus, much less is known about the evolutionary physiology of air‐breathing among fishes. This review summarises recent advances within the field with specific emphasis on the cardiorespiratory regulation associated with air‐breathing and terrestrial excursions, and how respiratory physiology of these living transitional forms are affected by development and personality. Finally, we provide a detailed and re‐evaluated model...
Tipo: Text
Palavras-chave: Development; Evolution; Phenotypic plasticity; Terrestrialization; Water-to-air transition.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00588/70029/67946.pdf

Qualité microbiologique des coquillages destinés à la consommation humaine. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Amouroux, Isabelle.
Tipo: Text
Palavras-chave: Méditerranée; Coquillages; Escherichia coli; Réglementation; Qualité microbiologique; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44243/43812.pdf

Débits fluviaux. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Dubois, Aurélie.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Débits fluviaux; Evolution; La Loire; La Garonne.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44001/43573.pdf

Qualité microbiologique des coquillages destinés à la consommation humaine : contamination des coquillages par Escherichia coli. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Amouroux, Isabelle.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Coquillages; Contamination; Escherichia coli; Réglementation; Qualité microbiologique; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43873/43447.pdf

Taxonomy and phylogenetic relationships of the coral genera Australomussa and Parascolymia (Scleractinia, Lobophylliidae)
Provedor de dados: 5
Autores: Arrigoni, Roberto; Richards, Zoe T.; Chen, Chaolun Allen; Baird, Andrew H.; Benzoni, Francesca.
Novel micromorphological characters in combination with molecular studies have led to an extensive revision of the taxonomy and systematics of scleractinian corals. In the present work, we investigate the macro- and micromorphology and the phylogenetic position of the genera Australomussa and Parascolymia, two monotypic genera ascribed to the family Lobophylliidae. The molecular phylogeny of both genera was addressed using three markers, the partial mitochondrial COI gene and the nuclear histone H3 and the ribosomal ITS region. Based on molecular data, Australomussa and Parascolymia belong to the Lobophylliidae and they cluster together with the genera Lobophyllia and Symphyllia within the same clade. While A. rowleyensis and P. vitiensis are closely...
Tipo: Text
Palavras-chave: COI; Evolution; Histone H3; Lobophyllia; Pacific Ocean; RDNA; Symphyllia; Systematics; Taxonomic revision.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00298/40912/39970.pdf

Evolution de l'environnement hydroclimatique du bassin de Marennes-Oléron dans le contexte du changement global
Provedor de dados: 5
Autores: Soletchnik, Patrick; Le Moine, Olivier; Polsenaere, Pierre.
Dans le contexte du changement global dont la cause anthropique est maintenant reconnue, cette étude dresse un bilan de l’évolution hydro-climatique des Pertuis Charentais (Bassin de Marennes-Oléron) depuis les quarante dernières années. Elle présente une comparaison de la situation hydro-climatique avant et après la « rupture thermique » des années 80-90, reconnue à l’échelle de l’hémisphère Nord et mise également en évidence dans les Pertuis entre 1983-1997. Les deux périodes comparées sont (1977-1991) d’une part et (2000-2015) d’autre part. Entre les deux, l’élévation des températures de l’eau de mer de 1,5°C en moyenne et 3°C en médiane, s’est accompagnée d’une élévation de la salinité (0,6 à 0,9) en lien avec un déficit d’apport des fleuves internes...
Tipo: Text
Palavras-chave: Hydrologie; Hydro-climat; Hydrodynamique; Bassin de Marennes-Oléron; Evolution; Réchauffement climatique; Apports; Fleuves; Température; Salinité; Nutriments; Chlorophylle a.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00387/49815/50391.pdf

Modification du régime de salinité. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Lazure, Pascal; Paillet, Jerome.
Tipo: Text
Palavras-chave: Mers celtiques; Salinité; Variations naturelles; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43964/43537.pdf

Retombées atmosphériques en substances dangereuses. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Retombées atmosphériques; Substances dangereuses; Métaux lourds; Polluants organiques persistants; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43864/43438.pdf

Retombées atmosphériques en nutriments. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanck, Aurélie.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Retombées atmosphériques; Nutriments; Azote; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43871/43445.pdf

Etat de la prolifération de la crépidule (Crepidula fornicata L.) dans le secteur de Granville (Golfe Normano-Beton - 1985)
Provedor de dados: 5
Autores: Quiniou, Francoise; Blanchard, Michel.
An area located between the Mont-St-Michel Bay and Jersey was monitored from 1984 to 1985. Limpet densities have been evaluated through quantitative sampling and underwater video. At the same time, some planktonic samplings have enabled the monitoring of the evolution of larval abundances. Maxima, planktonic and benthic density areas superpose each other. Moreover, the study of the populations shows that the number of young colonies is increasing, thus clearly indicating that Crepidula fornicata populating is booming in the Norman-Breton gulf.
Tipo: Text
Palavras-chave: Evolution; Distribution spatiale; Golfe Normano breton; Adulte; Larve; Crepidula fornicata.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-6190.PDF

Histoire des engins et techniques de pêche
Provedor de dados: 5
Autores: Beucher, Jean-paul; Deschamps, Gerard; Peronnet, Isabelle; Duhamel, Erwan; Barthelemy, Patricia.
L'homme a rapidement diversifié ses engins de pêche et on remarquera que les techniques alternatives qui sont actuellement pressenties pour remplacer le chalut prépondérant, sont des techniques très anciennes.
Tipo: Text
Palavras-chave: Chalut; Senne; Filet; Casier; Drague; Pêche; Capture; Technique; Engin de pêche; Histoire; Evolution; Fishing; Capture; Technics; Fishing gear; History; Evolution.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00002/11355/7928.pdf

Different secretory repertoires control the biomineralization processes of prism and nacre deposition of the pearl oyster shell
Provedor de dados: 5
Autores: Marie, Benjamin; Joubert, Caroline; Tayale, Alexandre; Zanella-cleon, Isabelle; Belliard, Corinne; Piquemal, David; Cochennec-laureau, Nathalie; Marin, Frederic; Gueguen, Yannick; Montagnani, Caroline.
Mollusca evolutionary success can be attributed partly to their efficiency to sustain and protect their soft body with an external biomineralized structure, the shell. Current knowledge of the protein set responsible for the formation of the shell microstructural polymorphism and unique properties remains largely patchy. In Pinctada margaritifera and Pinctada maxima, we identified 80 shell matrix proteins, among which 66 are entirely unique. This is the only description of the whole "biomineralization toolkit" of the matrices that, at least in part, is thought to regulate the formation of the prismatic and nacreous shell layers in the pearl oysters. We unambiguously demonstrate that prisms and nacre are assembled from very different protein repertoires....
Tipo: Text
Palavras-chave: Mantle; Mollusk shell matrix proteins; Proteome; Transcriptome; Evolution.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00118/22959/20922.pdf

Origin, Evolution and Homologies of the Weberian Apparatus: A New Insight
Provedor de dados: 77
Autores: Diogo,Rui.
The Weberian apparatus is essentially a mechanical device improving audition, consisting of a double chain of ossicles joining the air bladder to the inner ear. Despite being one of the most notable complex systems of teleost fishes and the subject of several comparative, developmental and functional studies, there is still much controversy concerning the origin, evolution and homologies of the structures forming this apparatus. In this paper I provide a new insight on these topics, which takes into account the results of recent works on comparative anatomy, paleontology, and ontogeny as well as of a recent extensive phylogenetic analysis including not only numerous otophysan and non-otophysan extant otocephalans but also ostariophysan fossils such as...
Tipo: Journal article
Palavras-chave: Evolution; Functional anatomy; Ostariophysi; Otocephala; Otophysi; Phylogeny; Teleostei; Weberian apparatus.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200008

Cordelia's Dilemma, Historical Bias, and General Evolutionary Trends: Catfishes as a Case Study for General Discussions on Phylogeny and Macroevolution
Provedor de dados: 77
Autores: Diogo,Rui.
As noted Gould in his recent and last book «The structure of evolutionary theory», discourses on the high importance and frequency of evolutionary trends have consumed a great part of the research on the history of clades. Although aware that natural selection theoretically yields adaptation to immediate environments, many authors defend such trends as generalised improvements somehow conferring advantages across most or all experienced environments. The high importance given to evolutionary trends is questioned by Gould, who considers that such a high importance given to such evolutionary trends bears no necessary relationship to the relative frequency or casual weight of these events in evolution, but mainly to a major bias: trends tell histories, and...
Tipo: Journal article
Palavras-chave: Evolution; Morphology; Phylogeny; Siluriformes; Teleostei.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500016

Die Evolution der Archaeopulmonata
Provedor de dados: 16
Autores: Harbeck, K.
The Archaeopulmonata are revised, using characters of the shell and the radula, while data concerning the ontogeny and ecological data are also taken into account. Archaeopulmonates are a group of the pulmonates with some conspicuous plesiomorphous character states They differ from the basommatophores and the stylommatophores by the presence of veliger larvae. This is seen in the early ontogenetic development of all members of the families of Archaeopulmonata, which are: Carychiidae, Chilinidae (incl. Latiinae), Siphonariidae, Onchidiidae, Amphibolidae, Otinidae and Ellobiidae (with most numerous genera and species). Altogether 33 genera and 59 recent species are discussed. Fossil material shows that the roots of this stem-group are old. Jurassic and...
Tipo: Article / Letter to the editor
Palavras-chave: Archaeopulmonata; Carychiidae; Chilinidae; Siphonariidae; Onchidiidae; Amphibolidae; Otinidae; Ellobiidae; Evolution; Taxonomy.; 42.73.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/317550

Volcanic island evolution and the environmental impact of volcanic activity: examples from a Cenozoic island arc in the Caribbean
Provedor de dados: 16
Autores: Jackson, T.A.
The different stages of volcanic island evolution are evident in the Cenozoic Lesser Antilles arc.
Tipo: Article / Letter to the editor
Palavras-chave: Island; Evolution; Vulcanic activity; Cenozoic Lesser Antilles arc; Caribbean; 38.37.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428045

Comparative studies in Chelicerata IV. Apatellata, Arachnida, Scorpionida, Xiphosura
Provedor de dados: 16
Autores: Hammen, L. van der.
A comparative study is made of four chelicerate classes: Apatellata (Solifugae and Pseudoscorpionida), Arachnida s. str. (both groups of Uropygi, i.e. Holopeltida and Schizomida, Amblypygi and Araneida), Scorpionida and Xiphosura. Methods, principles and terminology, adopted in this paper, correspond with those of parts I -111 of the present series of comparative studies in Chelicerata. Special attention is paid to segmentation of the body, respiratory organs, orifices of coxal glands, mouthparts, and appendages. The evolution of these structures is studied, and the relationships of the chelicerate classes and subclasses are reinvestigated and discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Amblypygi; Apatellata; Arachnida; Araneida; Chelicerata; Evolution; Holopeltida; Morphology; Pseudoscorpionida; Schizomida; Scorpionida; Solifugae; Uropygi; Xiphosura.; 42.74.
Ano: 1986
URL: http://www.repository.naturalis.nl/record/317847

The evolution of fossil ecosystems
Provedor de dados: 16
Autores: Schram, F.R.
Tipo: Book review
Palavras-chave: Evolution; Fossil ecosystems; Book review; 38.20.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/214351

Phylogeography of the Sponge Suberites diversicolor in Indonesia: insights into the evolution of marine lake populations
Provedor de dados: 16
Autores: Becking, L.E.; Erpenbeck, D.; Peijnenburg, K.T.C.A.; Voogd, N.J. de.
The existence of multiple independently derived populations in landlocked marine lakes provides an opportunity for fundamental research into the role of isolation in population divergence and speciation in marine taxa. Marine lakes are landlocked water bodies that maintain a marine character through narrow submarine connections to the sea and could be regarded as the marine equivalents of terrestrial islands. The sponge Suberites diversicolor (Porifera: Demospongiae: Suberitidae) is typical of marine lake habitats in the Indo-Australian Archipelago. Four molecular markers (two mitochondrial and two nuclear) were employed to study genetic structure of populations within and between marine lakes in Indonesia and three coastal locations in Indonesia,...
Tipo: Article / Letter to the editor
Palavras-chave: Suberites diversicolor; Indo-Australian Archipelago; Marine lakes; Evolution; 42.72.
Ano: 2013
URL: http://www.repository.naturalis.nl/record/470571

Pollen Evolution in Yams (Dioscorea: Dioscoreaceae)
Provedor de dados: 16
Autores: Schols, P.; Wilkin, P.; Furness, C.; Huysmans, S.; Smets, E.
Pollen character evolution in yams (Dioscorea: Dioscoreaceae) was investigated in relation to the phylogeny obtained from a recent combined analysis of rbcL and matK gene sequences. The following characters were evaluated: pollen size, aperture number, sexine ornamentation, perforation density, and orbicule presence or absence. Continuous characters were coded using the gap weighting method. Each character was optimized using MacClade onto a tree selected at random from analyses based on molecular data of Wilkin et al. The results indicate that in Dioscorea pollen size decreases in the more derived clades. The latter observation may be related to the evolution of annually replaced tubers. Aperture number increases from one in the monosulcate Stenophora...
Tipo: Article / Letter to the editor
Palavras-chave: Dioscorea; Dioscoreaceae; Pollen; Evolution; Phylogeny.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/407309

Life on a block of limestone: Evolutionary, ecological and geological dynamics of isolated malacofaunas on tropical karst
Provedor de dados: 16
Autores: Schilthuizen, M.
The karst formations of southeast Asia are a wonderful evolutionary and ecological experiment, and a sad example of observable extinction (Clements et al., 2006). In this paper, I shall focus on those in Malaysia and, in particular, on the land snail faunas that they support.
Tipo: Article / Letter to the editor
Palavras-chave: Karst formations; Southeast Asia; Malaysia; Evolution; Snails; 38.22; 42.73.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428472

A revision of the Genus Scincella (Reptilia: Sauria: Scincidae) of asia, with some notes on its evolution
Provedor de dados: 16
Autores: Ouboter, P.E.
Of the genus Scincella Mittleman, 1950 (sensu Greer, 1974) 337 specimens from Asia were examined for 74 characters, which were treated in a numerical-taxonomic way. The dendrogram resulting from this analysis was not stringently adhered to. Because of the wide variation in certain numerical scale characters within one taxon or even within one population, these characters (used by many authors as key characters to separate taxa) are not regarded as very important. For sympatric and parapatric species other characters, including relative size of head, body and limbs, are regarded as very important, because these characters are influenced by the way of life (niche separation). For the separation of allopatric species scale-numbers, but many other characters...
Tipo: Article / Letter to the editor
Palavras-chave: Scincidae; Scincella; Keys; New species; Numerical analysis; Evolution; Asia; Zoogeography.; 42.82.
Ano: 1986
URL: http://www.repository.naturalis.nl/record/317820

Rudists and the Pacific in the Late Jurassic and Early Cretaceous
Provedor de dados: 16
Autores: Skelton, P.W.; Sano, S.; Masse, J.-P.
The Pacific dimension of Late Jurassic to Early Cretaceous rudist evolution shows four phases, which are described in this article in more detail.
Tipo: Article / Letter to the editor
Palavras-chave: Rudists; Pacific; Late Jurassic; Early Cretaceous; Evolution; 38.22; 42.73.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428063

Evolution and biogeography of suboscine birds analysed by DNA sequence data – a research program at the Swedish Museum of Natural History
Provedor de dados: 16
Autores: Ericson, P.G.P.
Tipo: Article / Letter to the editor
Palavras-chave: Suboscine birds; Evolution; Biogeography; DNA; 42.83.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/210821

Terrestrial and coastal landscape evolution on tropical oceanic islands
Provedor de dados: 16
Autores: Viles, H.A.; Spencer, T.
Tropical oceanic islands owe their origin to volcanic eruptions, their location to plate tectonics, and their morphology to the interplay over time between a range of constructional and erosional processes. A broad distinction can be made between high volcanic islands, with summits up to 4,000 m, and low carbonate islands only a few metres above sea level.
Tipo: Article / Letter to the editor
Palavras-chave: Island; Evolution; Landscape evolution; Tropics; Volcanic islands; Carbonate islands; 38.37; 38.09.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428046

Cleavage, gastrulation, and germ disc formation of the amphipod Orchestia cavimana (Crustacea, Malacostraca, Peracarida)
Provedor de dados: 16
Autores: Scholtz, Gerhard; Wolff, Carsten.
Investigations of amphipod embryonic development have a long tradition. However, many aspects of amphipod embryology are still controversial. These concern, among others, the nature of the cleavage, the origin of the germ disc, and the mode of gastrulation. On the other hand, amphipods show the same characteristic type of invariant cell division pattern in the germ band as other malacostracans. Since amphipods seem to undergo a stereotyped pattern of early cleavage they are highly interesting for our understanding of the evolution of arthropod development. In this paper, we describe the cleavage pattern of the amphipod crustacean Orchestia cavimana from the zygote to gastrulation and the formation of the germ disc using direct observation, scanning...
Tipo: Article / Letter to the editor
Palavras-chave: Cell lineage; Cell migration; Arthropoda; Phylogeny; Evolution.
Ano: 2002
URL: http://www.repository.naturalis.nl/record/534334

Nature4Life: Knowledge agenda for research into biodiversity, ecology and evolution
Provedor de dados: 16
Autores: Biesmeijer, K.; Knoben, N.
The biggest social problems that we need to find answers to in the coming decades will concern food, water, economy, climate and quality of life, health and well-being. Although these are global issues, Dutch knowledge institutions are in a great position to make a major contribution to finding appropriate solutions.
Tipo: Report
Palavras-chave: Biodiversity; Ecology; Evolution; Biodiversity research.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/632270

Aspects of the evolution and biogeography of stygobiontic Isopoda (Crustacea: Peracarida)
Provedor de dados: 16
Autores: Wägele, Johann-Wolfgang.
The evolution of the stygobiontic isopods is discussed correlating the phylogenetic system with biogeography. All stygobiontic isopods probably are derived from remote marine ancestors. The colonization of subterranean aquatic biotopes occurred in two ways: (1) via the coastal groundwater in the case of the Microparasellidae, Gnathostenetroididae, Stenetriidae, and in Cyathura (Stygocyathura), (2) in most families, however, via epigean freshwater ancestors. Ancient freshwater isopods that must already have existed before the Cretaceous and whose stygobiontic phylogenetic lines partly must have existed before the opening of the Atlantic are the Aselloidea, Calabozoida, Phreatoicidea, and probably also the Protojaniridae. In the course of Cretaceous and...
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Isopoda; Evolution; Stygofauna; Biogeography.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504433

Functional morphology of a highly specialised pivot joint in the cranio-cervical complex of the minute lizard Ablepharus kitaibelii in relation to feeding ecology and behaviour
Provedor de dados: 16
Autores: Natchev, N.; Tzankov, N.; Vergilov, V.; Kummer, S.; Handschuh, S.
The snake-eyed skink Ablepharus kitaibelii is one of the smallest European lizards, but despite its minute size it is able to feed on comparatively large prey. Here we investigate the diet of A. kitaibelii and the mechanisms that allow the skink to overpower relatively large and even noxious prey. High-speed cinematography showed that A. kitaibelii uses a series of shaking and battering movements to immobilise and kill prey prior to swallowing. During this process, the skinks rises up on the hind limbs and then whacks the prey sidewise on the substrate by twisting the trunk, neck and head laterally. Our analysis showed that the shaking kinematics is very uniform among the investigated specimens. The morphological investigation of the cranio-cervical system...
Tipo: Article / Letter to the editor
Palavras-chave: Evolution; Feeding; Neck; Odontoid; Parallel; Skink; ΜCT; 42.82.
Ano: 2015
URL: http://www.repository.naturalis.nl/record/515947

A taxonomic revision of the Pleistocene Hystrix (Hystricidae, Rodentia) from Eurasia with notes on the evolution of the family
Provedor de dados: 16
Autores: Weers, D.J. van.
Measurements of many hundreds of the high-crowned cheek teeth of Hystrix specimens from the Euro-Asiatic Pleistocene in the collections of European and Asiatic institutions have been compared with extant species for a revision of the genus. A review is given about the extant genera and species of the family. The number of recognisable Euro-Asiatic species in the fossil record is reduced from eight to five. The European H. (A.) vinogradovi Argyropulo, 1941 is here considered to be a synonym of H. (A.) brachyura Linnaeus, 1758, and the three Asiatic species H. (H.) crassidens Lydekker, 1886, H. (H.) gigantea Van Weers, 1985 and H. (H.) magna Pei, 1987 are synonymized with H. (H.) refossa Gervais, 1852. Most of the Chinese fossil specimens are properly...
Tipo: Article / Letter to the editor
Palavras-chave: Porcupines; Asia; Evolution; Europe; Paleogeography; Pleistocene; 42.84.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/209654

Islands: Palaeontology, Geology and Tectonics
Provedor de dados: 16
Autores: Donovan, S.K.
The intention of this Lyell Meeting is to bring together tectonicists, geologists, palaeontologists and geomorphologists to discuss the intersection of their specialisms in the geology of islands.
Tipo: Article / Letter to the editor
Palavras-chave: Lyell meetings; Islands; Geology; Palaeontology; Tectonics; Evolution; Isolation; 38.20; 38.37; 38.22.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428038

Optics and phylogeny: is there an insight? The evolution of superposition eyes in the Decapoda (Crustacea)
Provedor de dados: 16
Autores: Gaten, Edward.
This paper addresses the use of eye structure and optics in the construction of crustacean phylogenies and presents an hypothesis for the evolution of superposition eyes in the Decapoda, based on the distribution of eye types in extant decapod families. It is suggested that reflecting superposition optics are symplesiomorphic for the Decapoda, having evolved only once, probably in the Devonian. Subsequent loss of reflecting superposition optics has occurred following the adoption of a new habitat (e.g. Aristeidae, Aeglidae) or by progenetic paedomorphosis (Paguroidea, Eubrachyura).
Tipo: Article / Letter to the editor
Palavras-chave: Compound eyes; Superposition optics; Adaptation; Evolution; Decapod crustaceans; Phylogeny.
Ano: 1998
URL: http://www.repository.naturalis.nl/record/534404

A structuralist approach in the study of evolution and classification
Provedor de dados: 16
Autores: Hammen, L. van der.
A survey is given of structuralism as a method that can be applied in the study of evolution and classification. The results of a structuralist approach are illustrated by examples from the laws underlying numerical changes, from the laws underlying changes in the chelicerate life-cycle, and from the laws underlying the evolution of the chelicerate appendages. Suggestions are given for the study of the laws underlying the transformation of form, and some notes are made on structuring forces and the early stages of organic evolution. Some concluding remarks are finally made on deep structure, phylogenetic classification and evolution.
Tipo: Article / Letter to the editor
Palavras-chave: Appendages; Chelicerata; Classification; Evolution; Increasing complexity; Individual; Laws of form; Life-cycle; Numerical changes; Primordial life; Segmentation; Sexuality; Structuralism; 42.21; 42.70.
Ano: 1985
URL: http://www.repository.naturalis.nl/record/319130

Multiple new Phytophthora species from ITS Clade 6 associated with natural ecosystems in Australia: evolutionary and ecological implications
Provedor de dados: 16
Autores: Jung, T.; Stukely, M.J.C.; Hardy, G.E.St.J.; White, D.; Paap, T.; Dunstan, W.A.; Burgess, T.I.
During surveys of dying vegetation in natural ecosystems and associated waterways in Australia many new taxa have been identified from Phytophthora ITS Clade 6. For representative isolates, the region spanning the internal transcribed spacer region of the ribosomal DNA, the nuclear gene encoding heat shock protein 90 and the mitochondrial cox1 gene were PCR amplified and sequenced. Based on phylogenetic analysis and morphological and physiological comparison, four species and one informally designated taxon have been described; Phytophthora gibbosa, P. gregata, P. litoralis, P. thermophila and P. taxon paludosa. Phytophthora gibbosa, P. gregata and P. taxon paludosa form a new cluster and share a common ancestor; they are homothallic and generally...
Tipo: Article / Letter to the editor
Palavras-chave: Aquatic habitat; Breeding systems; Evolution; Phylogeny; Radiation; Sterility; Survival.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/532234

Balsaminaceae in Southeast Asia: systematics, evolution, and pollination biology
Provedor de dados: 16
Autores: Ruchisansakun, S.
Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity. Its classification has changed many times throughout the taxonomic history of the group, owing to the emphasis on particular diagnostic characters. This suggests that patterns of character evolution are labile and do not contain much phylogenetic signal. This appears particularly prevalent among floral characters, suggesting that floral evolution and pollination ecology may be important drivers of diversification in the family. Further complications in taxonomy arise from the fact that one of the two genera of the family, Impatiens, has a very large number of species, and that it is distributed across several continents. This has led to a lack of taxonomic...
Tipo: Book (monograph)
Palavras-chave: Balsaminaceae; Impatiens; Southeast Asia; Myanmar; Pollination biology; Evolution; Plant systematic floral symmetry Asymmetric flower Pollen placement; Floral symmetry; Asymmetric flower; Pollen placement.
Ano: 2018
URL: http://www.repository.naturalis.nl/record/663658

The subjective nature of Linnaean categories and its impact in evolutionary biology and biodiversity studies
Provedor de dados: 16
Autores: Laurin, M.
Absolute (Linnaean) ranks are essential to rank-based nomenclature (RN), which has been used by the vast majority of systematists for the last 150 years. They are widely recognized as being subjective among taxonomists, but not necessarily in other fields. For this reason, phylogenetic nomenclature (PN) and other alternative nomenclatural systems have been developed. However, reluctance to accept alternative nomenclatural systems and continued use of higher taxa of a given Linnaean category in comparative analyses presumably reflect a lack of appreciation of the deleterious effects of the subjective nature of Linnaean categories in other biological fields, such as conservation and evolutionary biology. To make that point clearer, evolutionary models under...
Tipo: Article / Letter to the editor
Palavras-chave: Biological nomenclature; Codes of nomenclature; Comparative biology; Evolution; PhyloCode; Phylogenetic; Nomenclature; 42.21.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/361032

Evolution of fruit and seed characters in the Diervilla and Lonicera clades (Caprifoliaceae, Dipsacales)
Provedor de dados: 16
Autores: Jacobs, B.; Lens, F.; Smets, E.
Background and Aims: The Diervilla and Lonicera clades are members of the family Caprifoliaceae (Dipsacales sensu Donoghue et al., 2001, Harvard Papers in Botany 6: 459–479). So far, the intergeneric relationships of the Lonicera clade and the systematic position of Heptacodium remain equivocal. By studying fruit and seed morphology and anatomy, an attempt is made to clarify these issues. In addition, this study deals with the evolution of fruit and seed characters of the Diervilla and Lonicera clades with reference to allied taxa.  Methods: Light and scanning electron microscopy were used for the morphological and anatomical investigations. Phylogenetic analyses were carried out by applying the parsimony and Bayesian inference optimality criteria....
Tipo: Article / Letter to the editor
Palavras-chave: Diervilla; Weigela; Symphoricarpos; Lonicera; Triosteum; Leycesteria; Heptacodium; Caprifoliaceae; Dipsacales; Fruit; Seed; Evolution; 42.56.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/421854

New primers for promising single-copy genes in fungal phylogenetics and systematics
Provedor de dados: 16
Autores: Schmitt, I.; Crespo, A.; Divakar, P.K.; Fankhauser, J.D.; Herman-Sackett, E.; Kalb, K.; Nelsen, M.P.; Nelson, N.A.; Rivas-Plata, E.; Shimp, A.D.; Widhelm, T.; Lumbsch, H.T.
Developing powerful phylogenetic markers is a key concern in fungal phylogenetics. Here we report degenerate primers that amplify the single-copy genes Mcm7 (MS456) and Tsr1 (MS277) across a wide range of Pezizomycotina (Ascomycota). Phylogenetic analyses of 59 taxa belonging to the Eurotiomycetes, Lecanoromycetes, Leotiomycetes, Lichinomycetes and Sordariomycetes, indicate the utility of these loci for fungal phylogenetics at taxonomic levels ranging from genus to class. We also tested the new primers in silico using sequences of Saccharomycotina, Taphrinomycotina and Basidiomycota to predict their potential of amplifying widely across the Fungi. The analyses suggest that the new primers will need no, or only minor sequence modifications to amplify...
Tipo: Article / Letter to the editor
Palavras-chave: Ascomycota; DNA replication licensing factor; Evolution; Lichenised fungi; Mcm7; MS277; MS456; Phylogeny; Pre-rRNA processing protein; Protein-coding; Tsr1.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/531799

Evolutionary ecology of the Pachydontinae (Bivalvia, Corbulidae) in the Pebas lake/wetland system (Miocene, western Amazonia)
Provedor de dados: 16
Autores: Wesselingh, F.P.
Miocene deposits in western Amazonia and adjacent areas of South America harbour a diverse suite of endemic corbulid bivalves, commonly referred to as Pachydontinae, that show a wide variety of morphologies. Especially in the Miocene Pebas Formation (Peru, Colombia and Brazil), this group diversified spectacularly. Since these corbulids (a cosmopolitan marine and perimarine bivalve family) occur with freshwater taxa and yield isotope signals strongly indicative of freshwater settings, the success of this group in inland basins of Miocene northwestern South America is surprising. In this paper it is argued that a combination of adaptations to fluid bottom substrates, common dysoxia and high predation intensities explains their abundance, their morphological...
Tipo: Article / Letter to the editor
Palavras-chave: Corbulidae; Pachydontinae; Miocene; Amazonia; Evolution; Adaptation; 42.73; 38.22.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/209734

Molecular phylogenetic analyses reveal a close evolutionary relationship between Podosphaera (Erysiphales: Erysiphaceae) and its rosaceous hosts
Provedor de dados: 16
Autores: Takamatsu, S.; Niinomi, S.; Harada, M.; Havrylenko, M.
Podosphaera is a genus of the powdery mildew fungi belonging to the tribe Cystotheceae of the Erysiphaceae. Among the host plants of Podosphaera, 86 % of hosts of the section Podosphaera and 57 % hosts of the subsection Sphaerotheca belong to the Rosaceae. In order to reconstruct the phylogeny of Podosphaera and to determine evolutionary relationships between Podosphaera and its host plants, we used 152 ITS sequences and 69 28S rDNA sequences of Podosphaera for phylogenetic analyses. As a result, Podosphaera was divided into two large clades: clade 1, consisting of the section Podosphaera on Prunus (P. tridactyla s.l.) and subsection Magnicellulatae; and clade 2, composed of the remaining member of section Podosphaera and subsection Sphaerotheca. Because...
Tipo: Article / Letter to the editor
Palavras-chave: 28S rDNA; Evolution; ITS; Molecular clock; Phylogeny; Powdery mildew fungi; Rosaceae.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/532391

Fitting macroevolutionary models to phylogenies: an example using vertebrate body sizes
Provedor de dados: 16
Autores: Mooers, Arne Ø.; Schluter, Dolph.
How do traits change through time and with speciation? We present a simple and generally applicable method for comparing various models of the macroevolution of traits within a maximum likelihood framework. We illustrate four such models: 1) variance among species accumulates in direct proportion to time separating them (gradual model); 2) variation accumulates with the number of speciation events separating them (speciational model); 3) differences between species are unrelated to phylogenetic relatedness (pitchfork model); and 4) a free model where the trait evolves at its own idiosyncratic rate among lineages. Using species-specific body size, we compare the four models across two data sets: twenty-one clades of vertebrate species, and two clades of...
Tipo: Article / Letter to the editor
Palavras-chave: Brownian motion; Macroevolution; Maximum likelihood; Phylogenies; Vertebrate body size; Evolution.
Ano: 1998
URL: http://www.repository.naturalis.nl/record/534379

The type material and the enamel structure of Villanyia exilis KRETZOI, 1956 (Arvicolidae, Rodentia)
Provedor de dados: 16
Autores: Mayhew, D.F.
Re-examination of the two teeth constituting the original type and genotype material of Villanyia exilis KRETZOI, 1956 from Villány-5, Hungary, indicates that subsequently published descriptions need revision. The tooth selected as the lectotype of Villanyia exilis by RABEDER (1981) is considered here to belong to Clethrionomys kretzoii (KOWALSKI, 1958). The second specimen, with morphology in accordance with the original description of Kretzoi, is considered to represent the characters of Villanyia exilis. In order to stabilise the nomenclature in accordance with current usage an application has been made to the International Commission on Zoological Nomenclature. The fine structure of the enamel of Villanyia exilis as defined above is described for the...
Tipo: Article / Letter to the editor
Palavras-chave: Voles; Pliocene; Pleistocene; Taxonomy; Evolution; Europe; Enamel structure.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/659250

New hypogean cyclopoid copepods (Crustacea) from the Yucatán Peninsula, Mexico
Provedor de dados: 16
Autores: Fiers, Frank; Reid, Janet W.; Iliffe, Thomas M.; Suárez-Morales, Eduardo.
Four previously unknown hypogean species of cyclopoid copepods were collected in cenotes and wells of the Yucatán Peninsula, Mexico. Diacyclops chakan sp. n. and D. puuc sp. n. differ from their congeners in combining 3-segmented swimming legs, 11-segmented antennules, and legs 1-4 endopodite segment 2 all with 2 setae. Species of Diacyclops rarely occur in tropical regions, and the Diacyclops described here are only the second and third species recorded from Mexico. The benthic D. puuc was found in the large underground reservoir of a cenote. Diacyclops chakan was encountered in such large open subterranean water basins, but more frequently and abundantly in wells. The two Mesocyclops species, M. chaci sp. n. and M. yutsil sp. n., most closely resemble...
Tipo: Article / Letter to the editor
Palavras-chave: Diacyclops; Mesocyclops; Copepoda; Cyclopoida; Biogeography; Evolution; Hypogean; Karst; Species-flock; Taxonomy; Mexico.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/504240

Old teeth, new methods: microtexture and morphometry analysis provide insight in gradual evolution and dietary change in the extinct bovid Myotragus
Provedor de dados: 16
Autores: Winkler, D.E.
This article reveals that either a dietary shift took place in this lineage or Myotragus successively adapted to increased intraspecific competition, expanding its dietary range to adapt to energetic restrictions.
Tipo: Article / Letter to the editor
Palavras-chave: Microtexture; Morphometry; Evolution; Dietary change; Bovid; Energetic restrictions; 38.22; 42.84.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428251

When forms meet genes: revision of the scleractinian genera Micromussa and Homophyllia (Lobophylliidae) with a description of two new species and one new genus
Provedor de dados: 16
Autores: Arrigoni, R.; Benzoni  Danwei Huang, Hironobu Fukami, Chaolun Allen Chen, Michael L. Berumen, Mia Hoogenboom, Damian P. Thomson, Bert W. Hoeksema, Ann F. Budd, Yuna Zayasu, Tullia I. Terraneo, Yuko F. Kitano, Andrew H. Baird, F.; Huang, D.; Fukami, H.; Chen, C.A.; Berumen, M.L.; Hoogenboom, M.; Thomson, D.P.; Hoeksema,, B.W.; Budd, A.F.; Zayasu, Y.; Terraneo, T.I.; Kitano, Y.F.; Baird, A.H.
The scleractinian family Lobophylliidae is undergoing a major taxonomic revision thanks to the combination of molecular and morphological data. In this study, we investigate the evolutionary relationships and the macro- and micromorphology of six nominal coral species belonging to two of the nine molecular clades of the Lobophylliidae, clades A and B, and of Symphyllia wilsoni, a lobophylliid species analyzed from a molecular point of view for the first time. Sequence data from mitochondrial DNA (COI and the intergenic spacer between COI and l-rRNA), and nuclear DNA (histone H3 and ITS region) are used to generate robust molecular phylogenies and a median-joining haplotype network. Molecular results are strongly in agreement with detailed observations of...
Tipo: Article / Letter to the editor
Palavras-chave: Coral; Evolution; Phylogeny; Systematics; Taxonomy.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/619236

The Tenasserim Lutung, Trachypithecus barbei (Blyth, 1847) (Primates: Cercopithecidae): Description of a live specimen, and a reassessment of phylogenetic affinities, taxonomic history, and distribution
Provedor de dados: 16
Autores: Geissmann, Thomas; Groves, Colin P.; Roos, Christian.
The Tenasserim lutung Trachypithecus barbei was previously known from museum specimens and field observations only. We discovered a zoo specimen and present the first confirmed evidence for the continued existence of the species since 1967. We describe the cranial pelage and coloration characteristics of this species which were previously unknown. We present first molecular evidence for recognizing T. barbei as a distinct species and for assessing its phylogenetic affinities relative to other members of the genus Trachypithecus. We document the taxonomic history of T. barbei and present a distribution map based on a compilation of all known locality records.
Tipo: Article / Letter to the editor
Palavras-chave: Trachypithecus barbei; Taxonomy; Systematics; Evolution; Genetics.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/534417

What shapes amino acid and sugar composition in Mediterranean floral nectars?
Provedor de dados: 16
Autores: Petanidou, T.; Van Laere, A.; Ellis, W.; Smets, E.
We studied the amino acid (AA) composition of the floral nectars of 73 plant species occurring in a phryganic (East Mediterranean garrigue) community and investigated whether AA and sugar composition is shaped by evolutionary (plant phylogeny), ecological (flowering time as a direct effect of summer drought) and coevolutionary (pollinator partnership) constraints. Our study utilised an extensive plantpollinator matrix compiled in the same area where the plants had been sampled.  Using HPLC we detected 22 AA compounds/groups of compounds, out of which 15 were commonly present in almost all nectars. Among all AAs, phenylalanine was the most abundant, especially in keystone (â€˜â€˜cornucopianâ€™â€™) plant species visited by many insect species, such as the...
Tipo: Article / Letter to the editor
Palavras-chave: Floral nectar; Composition; Mediterranean; Evolution; Ecology; Coeveloution.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/407342

Megapode phylogeny and the interpretation of incubation strategies
Provedor de dados: 16
Autores: Dekker, R.W.R.J.; Brom, T.G.
Among megapodes, several incubation stategies can be recognized. Eggs are incubated by heat generated from microbial decomposition, volcanism, or the sun. For a long time, controversy has existed whether these strategies represent primitive traits, inherited from reptilian ancestors, or have evolved from the 'regular' way of incubation in birds. In this paper these strategies are interpreted by superimposing them on the most recent phylogenetic hypotheses regarding the inter- and intrafamilial relationships of megapodes. We conclude that similarities shared with reptiles and kiwis are due to convergence. Arguments are put forward that mound-building represents the plesiomorphic condition in megapodes and that burrow-nesting has been derived from it....
Tipo: Article / Letter to the editor
Palavras-chave: Megapodiidae; Incubation-strategies; Evolution; Apterygidae.; 42.83.
Ano: 1992
URL: http://www.repository.naturalis.nl/record/317761

Malassezia vespertilionis sp. nov.: a new cold-tolerant species of yeast isolated from bats
Provedor de dados: 16
Autores: Lorch, J.M.; Palmer, J.M.; Vanderwolf, K.J.; Schmidt, K.Z.; Verant, M.L.; Weller, T.J.; Blehert, D.S.
Malassezia is a genus of medically-important, lipid-dependent yeasts that live on the skin of warmblooded animals. The 17 described species have been documented primarily on humans and domestic animals, but few studies have examined Malassezia species associated with more diverse host groups such as wildlife. While investigating the skin mycobiota of healthy bats, we isolated a Malassezia sp. that exhibited only up to 92 % identity with other known species in the genus for the portion of the DNA sequence of the internal transcribed spacer region that could be confidently aligned. The Malassezia sp. was cultured from the skin of nine species of bats in the subfamily Myotinae; isolates originated from bats sampled in both the eastern and western United...
Tipo: Article / Letter to the editor
Palavras-chave: Chiroptera; Evolution; Hibernation; Malassezia; Myotis; New species; Phylogeny.
Ano: 2018
URL: http://www.repository.naturalis.nl/record/643310

Taxonomy and phylogenetic relationships of the coral genera Australomussa and Parascolymia (Scleractinia, Lobophylliidae)
Provedor de dados: 16
Autores: Arrigoni, R.; Richards, Z.T.; Chen, C.A.; Baird, A.H.; Benzoni, F.
Novel micromorphological characters in combination with molecular studies have led to an extensive revision of the taxonomy and systematics of scleractinian corals. In the present work, we investigate the macro- and micromorphology and the phylogenetic position of the genera Australomussa and Parascolymia, two monotypic genera ascribed to the family Lobophylliidae. The molecular phylogeny of both genera was addressed using three markers, the partial mitochondrial COI gene and the nuclear histone H3 and the ribosomal ITS region. Based on molecular data, Australomussa and Parascolymia belong to the Lobophylliidae and they cluster together with the genera Lobophyllia and Symphyllia within the same clade. While A. rowleyensis and P. vitiensis are closely...
Tipo: Article / Letter to the editor
Palavras-chave: COI; Evolution; Histone H3; Lobophyllia; Pacific Ocean; RDNA; Symphyllia; Systematics; Taxonomic revision; 42.72.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/499033

Six new Phytophthora species from ITS Clade 7a including two sexually functional heterothallic hybrid species detected in natural ecosystems in Taiwan.
Provedor de dados: 16
Autores: Jung, T.; Jung, M.H.; Scanu, B.; Seress, D.; Kovács, G.M.; Maia, C.; Pérez-Sierra, A.; Chang, T.-T.; Chandelier, A.; Heungens, K.; Poucke, K. van; Abad-Campos, P.; Léon, M.; Cacciola, S.O.; Bakonyi, J.
During a survey of Phytophthora diversity in natural ecosystems in Taiwan six new species were detected. Multigene phylogeny based on the nuclear ITS, ß-tubulin and HSP90 and the mitochondrial cox1 and NADH1 gene sequences demonstrated that they belong to ITS Clade 7a with P. europaea, P. uniformis, P. rubi and P. cambivora being their closest relatives. All six new species differed from each other and from related species by a unique combination of morphological characters, the breeding system, cardinal temperatures and growth rates. Four homothallic species, P. attenuata, P. flexuosa, P. formosa and P. intricata, were isolated from rhizosphere soil of healthy forests of Fagus hayatae, Quercus glandulifera, Q. tarokoensis, Castanopsis carlesii,...
Tipo: Article / Letter to the editor
Palavras-chave: Biosecurity; Breeding systems; Evolution; Flow cytometry; Phylogeny; Phytophthora cambivora; Radiation.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/618617

Left-right asymmetry in plants and animals: a gold mine for research
Provedor de dados: 16
Autores: Schilthuizen, M.; Gravendeel, B.
Left-right asymmetry patterns in the body shapes of animals and plants have been a continuous source of interest among biologists. Recently, inroads have been made to developing a coherent research programme that makes use of the unique fact that chiral patterns may be studied (and generalities deduced) by comparisons across many unrelated groups, even across Kingdoms. The papers delivered at the symposium ‘Evolution of Chirality’ during the 2011 European congress of evolutionary biology (ESEB) provide examples of the various research programs that are currently developing within this field. The present paper provides a summary of the symposium, an introduction to this Special Issue of Contributions to Zoology, as well as suggestions for further...
Tipo: Article / Letter to the editor
Palavras-chave: Chirality; Development; Evolution; Evo-devo; 42.21.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/419170

New perspectives on the evolution of the genus Typhlatya (Crustacea, Decapoda): first record of a cavernicolous atyid in the Iberian Peninsula, Typhlatya miravetensis n. sp
Provedor de dados: 16
Autores: Sanz, Sebastián; Platvoet, Dirk.
On several occasions, shrimps belonging to a new species of the genus Typhlatya were collected in a cave in the province of Castellón, Spain. This is the first record of the genus in the Iberian Peninsula. The species is described and the validity, distribution, and zoogeography of the genus, as well as the status of the genus Spelaeocaris, are discussed. Former models for the evolution of the genus Typhlatya and its genus group are reviewed, as well as the system of inner classification of the Atyidae and its biogeographical meaning. For the age and evolution of the genus we developed a new model based on vicariance principles that involves further evolution of each species after the disruption of the ancestral range. This allows new estimations for the...
Tipo: Article / Letter to the editor
Palavras-chave: Typhlatya; Decapoda; Spain; Subterranean waters; Systematics; Zoogeography; Vicariance; Evolution; Key to genus.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/503881

Amazonia through time: Andean uplift, climate change, landscape evolution and biodiversity
Provedor de dados: 16
Autores: Hoorn, C.; Wesselingh, F.P.; Steege, H. ter; Bermudez, M.A.; Mora, A.; Sevink, J.; Sanmartín, I.; Sanchez-Meseguer, A.; Anderson, C.L.; Figueiredo, J.P.; Jaramillo, C.; Riff, D.; Negri, F.R.; Hooghiemstra, H.; Lundberg, J.; Stadler, T.; Särkinen, T.; Antonelli, A.
The Amazonian rainforest is arguably the most species-rich terrestrial ecosystem in the world, yet the timing of the origin and  volutionary causes of this diversity are a matter of debate. We review the geologic and phylogenetic evidence from Amazonia and compare it with uplift records from the Andes. This uplift and its effect on regional climate fundamentally changed the Amazonian landscape by reconfiguring drainage patterns and creating a vast influx of sediments into the basin. On this “Andean” substrate, a region-wide edaphic mosaic developed that became extremely rich in species, particularly in Western Amazonia. We show that Andean uplift was crucial for the evolution of Amazonian landscapes and ecosystems, and that current biodiversity patterns...
Tipo: Article / Letter to the editor
Palavras-chave: Amazonia; Evolution; Biodiversity; 42.05; 42.21; 38.23.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/365034

Nothophytophthora gen. nov., a new sister genus of Phytophthora from natural and semi-natural ecosystems
Provedor de dados: 16
Autores: Jung, T.; Scanu, B.; Bakonyi, J.; Seress, D.; Kovács, G.M.; Durán, A.; Sanfuentes von Stowasser, E.; Schena, L.; Mosca, S.; Thu, P.Q.; Nguyen, C.M.; Fajardo,  , S.; González, M.; Pérez-Sierra, A.; Rees, H.; Cravador, A.; Maia, C.; Horta Jung, M.
During various surveys of Phytophthora diversity in Europe, Chile and Vietnam slow growing oomycete isolates were obtained from rhizosphere soil samples and small streams in natural and planted forest stands. Phylogenetic analyses of sequences from the nuclear ITS, LSU, β-tubulin and HSP90 loci and the mitochondrial cox1 and NADH1 genes revealed they belong to six new species of a new genus, officially described here as Nothophytophthora gen. nov., which clustered as sister group to Phytophthora. Nothophytophthora species share numerous morphological characters with Phytophthora: persistent (all Nothophytophthora spp.) and caducous (N. caduca, N. chlamydospora, N. valdiviana, N. vietnamensis) sporangia with variable shapes, internal differentiation of...
Tipo: Article / Letter to the editor
Palavras-chave: Breeding system; Caducity; Evolution; Oomycetes; Peronosporaceae; Phylogeny.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/635416

New and little-known species of Chthoniidae and Neobisiidae (Pseudoscorpiones, Arachnida) from the Movile Cave in southern Dobrogea, Romania
Provedor de dados: 16
Autores: Ćurčić, Božidar P.M.; Poinar, George O.; Sarbu, Serban M.
Two species of Roncus L. Koch, 1873 (Neobisiidae), new to science (R. ciobanmos n. sp. and R. dragobete n. sp.), and one species of Neobisium Chamberlin, 1930 [N. (N). biharicum Beier, 1939], collected in the Movile Cave, southern Dobrogea, Romania, have been described, diagnostic characters illustrated, and their geographic distribution analyzed. In addition, the description of Chthonius (Chthonius) monicae Boghean, 1989 (Chthoniidae), otherwise known only from two females, has been amended. The possible relationships of these species are discussed in view of the importance of some diagnostic characters and of the evolution of their cave habitat.
Tipo: Article / Letter to the editor
Palavras-chave: Cave fauna; Taxonomy; Biogeography; Evolution; Pseudoscorpions; Chthoniidae; Neobisiidae; Chthonius; Roncus; Neobisium; New species.
Ano: 1994
URL: http://www.repository.naturalis.nl/record/504604

Insectivores (Erinaceomorpha, Soricomorpha; Mammalia) from Karydia and Komotini (Thrace, Greece; MN 4/5)
Provedor de dados: 16
Autores: Doukas, C.S.; Hoek Ostende, L.W. van den.
The insectivores from the Thrace locality of Karydia (MN 4) are described, as well as an erinaceid molar from thenearby locality of Komotini (MN 5). The Karydia assemblagecontains the same genera of the Greek MN 4 localityAliveri, with the addition of a shrew and of Plesiosorex. An M2 of the latter is the southernmost occurrence of this genus, and the first record from the Mediterranean area. At the species level there are differences between Karydia and Aliveri. As Galerix kostakii n.sp. from Karydia is interpreted as a descendant of G. symeonidisi from Aliveri, a younger age for the Thrace locality, as was already assumed on the basis of the rodents, is confirmed. A model is proposed in which the symeondisi-kostakii lineage gives rise to Parasorex, of...
Tipo: Article / Letter to the editor
Palavras-chave: Insectivores; New species; Evolution; Miocene; Greece; 38.22; 42.84.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/327718

Combating footnote status in evolutionary theory
Provedor de dados: 16
Autores: Jenner, R.A.
Tipo: Book review
Palavras-chave: Evolution; Natural selection; Variation; Developmental bias; 42.21.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/215632

Comparative studies in Chelicerata III. Opilionida
Provedor de dados: 16
Autores: Hammen, L. van der.
A comparative study is made of the three groups (Cyphophthalmi, Laniatores and Palpatores) into which Opilionida are currently subdivided. Methods, principles and terminology, adopted in this paper, correspond with those of parts I and II of the present series of studies in Chelicerata. Special attention is paid to mouthparts and appendages, to opilionid relationships, and to the evolution of chelicerate characters. It is demonstrated that Cyphophthalmi present all the essential opilionid characters, and evidently do not constitute a separate group. It is also demonstrated that Opilionida are not closely related to Actinotrichid or Anactinotrichid mites, but to other groups with a so-called myliosoma (mouthparts associated with coxisternal feeding); these...
Tipo: Article / Letter to the editor
Palavras-chave: Opilionida; Chelicerata; Comparative morphology; Classification; Evolution; Phy- logeny.; 42.74.
Ano: 1985
URL: http://www.repository.naturalis.nl/record/317785

A review of Chorthippus species with angled pronotal lateral keels from Greece with special reference to transitional populations between some Peloponnesean taxa (Orthoptera, Acrididae)
Provedor de dados: 16
Autores: Willemse, F.; Helversen, O. von; Odé, B.
This paper presents a summary of the current knowledge on the systematics of the Greek taxa of Chorthippus, morphologically characterised by angled lateral pronotal keels (usually grouped as Glyptobothrus). Prior to this paper, based on traditional morphology, ten taxa of Chorthippus with angled lateral pronotal keels were recognized from Greece. Based on morphology as well as (and more importantly so) bioacoustics thirteen Greek taxa are now recognised. With addition of a few additional related taxa that occur only outside Greece, all are treated in this paper: Chorthippus apricarius apricarius (Linnaeus, 1758), C. vagans vagans (Eversmann, 1848) (not in Greece), C. v. cypriotus (Uvarov, 1936) stat. nov. [Cyprus], C. v. africanus Nadig, 1981 [N. Africa],...
Tipo: Article / Letter to the editor
Palavras-chave: Chorthippus; Glyptobothrus; Greece; Acrididae; Orthoptera; Morphology; Bioacoustics; Taxonomy; Variability; Transitional or hybrid populations; Phylogeny; Evolution; Palaeobiogeography; Key; Distribution; Ecology; 42.75.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/314191

How near, how far? Adaptive radiation in mammals and birds on various islands
Provedor de dados: 16
Autores: Hoek Ostende, L.W. van den; Locatelli, E.; Meijer, H.J.M.
Many factors control radiations on islands, but some general patterns do emerge. Bird radiations are mostly found on oceanic archipelagos far from the continental coast line. Mammal radiations are mostly know from island arcs, which are somewhat easier to reach though still isolated enough to allow evolutionary lineages to develop and diverge. In contrast to birds, strong mammal radiations seem possible on a single island.
Tipo: Article / Letter to the editor
Palavras-chave: Islands; Evolution; Evolutionary theory; Adaptive radiation; 38.22; 42.84; 42.83.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428471

Cytogenetics studies in Brazilian species of Pseudophyllinae (Orthoptera: Tettigoniidae): 2n(♂)=35 and fn=35 the probable basic and ancestral karyotype of the family tettigoniidae
Provedor de dados: 82
Autores: Ferreira,Amilton; Mesa,Alejo.
The karyotypes of five species of Brazilian Pseudophyllinae belonging to four tribes were here studied. The data available in the literature altogether with those obtained with species in here studied allowed us to infer that 2n(♂)=35 is the highest chromosome number found in the family Tettigoniidae and that it is present in species belonging to Pseudophyllinae, Zaprochilinae and in one species of Tettigoniinae. In spite of that all five species exhibit secondary karyotypes arisen surely by a mechanism of chromosomal rearrangement of centric fusion, tandem fusion and centric inversion types from those with 2n(♂)=35 and FN=35, they share some common traits. The X chromosome is submetacentric (FN=36), heteropicnotic during the first prophase, the largest of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosomal rearrangement; Fusion and centric inversion; Evolution.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400019

Comparative analysis of morphological, structural and morphometric patterns of Polistes versicolor (Olivier) (Hymenoptera: Vespidae) hypopharyngeal glands
Provedor de dados: 82
Autores: Britto,Fábio B.; Caetano,Flávio H.; Moraes,Regina L.M.S. de.
Using ultramorphological and histochemical techniques, this study describes the structural and morphological patterns of Polistes versicolor (Olivier) hypopharyngeal glands, comparing them with patterns of other Hymenopteran groups. Besides, the presence of intra-specific variation was evidenced by morphometric analysis of the secretory cells in wasps with different ages. The studied species presented glands with primitive characteristics, with secretory cells discharging individually in the hypopharyngeal plate. The morphological pattern found in hypopharyngeal glands was basically the same for all studied wasps, however, the length of glandular cells showed significant variations between individuals. Apparently these variations are not related with age.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wasp; Salivary system; Evolution; Morphology; Morphometry.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000300007

Phenotypic variation of the Aedeagus of Drosophila serido vilela &amp;amp; sene (Diptera: Drosophilidae)
Provedor de dados: 82
Autores: Franco,Fernando F.; Soto,Ignacio M.; Sene,Fabio M.; Manfrin,Maura H.
Drosophila serido Vilela &amp;amp; Sene is a polytypic and cactophilic species with broad geographic distribution in Brazil. The morphology of the aedeagi of eight natural populations of D. serido was analyzed. Based on features of their aedeagi, populations of D. serido were discriminated with an efficiency of nearly 75%. The analysis using the Mantel test suggests that the morphological divergence of D. serido is correlated with the geographic distance among populations. There is no single cause to explain the observed pattern; therefore, the results were discussed considering the three main hypotheses to explain the aedeagus evolution: lock and key, pleiotropy and sexual selection. Alternatively, the aedeagus variability of D. serido might be related to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Evolution; Geometric morphometric; Repleta group.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000500009

Cytogenetics studies in thirteen Brazilian species of Phaneropterinae (Orthoptera: Tettigonioidea: Tettigoniidae): main evolutive trends based on their karyological traits
Provedor de dados: 82
Autores: Ferreira,Amilton; Mesa,Alejo.
The thirteen species of Phaneropterinae here studied can be arranged in four different groups according to their basic karyological traits. All of them share the same kind of chromosomal sex determining mechanism with X0(male) and XX(female). The X chromosome differs among species and always appears heteropycnotic during prophase I, it is the largest in the set and segregates precociously during anaphase I. Among the species, the karyotypes varies in fundamental number between 31 to 21. The meaning of these significant changes in the karyotypes in relation to the phylogeny within some large taxonomic group of species is discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Karyotype; Chromosome; Evolution.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000400003

Phylogeography of the banded butterflyfish, Chaetodon striatus, indicates high connectivity between biogeographic provinces and ecosystems in the western Atlantic
Provedor de dados: 83
Autores: Liedke,Ana M.R.; Pinheiro,Hudson T.; Floeter,Sergio R.; Bernardi,Giacomo.
ABSTRACT Among the four butterflyfishes of the genus Chaetodon present in the western Atlantic, the banded butterflyfish Chaetodon striatus has the largest distribution range, spanning 44 degrees of latitude (from Massachusetts, USA to Santa Catarina, Brazil). Although the ecology of the banded butterflyfish has been well studied over its entire range, nothing is known about its phylogeography and how biogeographic barriers structure its populations. To assess the level of genetic connectivity among populations from distinct biogeographic provinces and environmental conditions, we collected samples from seven localities: Puerto Rico, in the Caribbean, and Tamandaré, Salvador, Abrolhos, Trindade Island, Arraial do Cabo and Florianópolis, in Brazil. One...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biogeography; Evolution; Mitochondrial Genes; Nuclear Genes; Reef Fish.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000100205

Systematics and biogeography of Sternarchellini (Gymnotiformes: Apteronotidae): Diversification of electric fishes in large Amazonian rivers
Provedor de dados: 83
Autores: Ivanyisky III,Stephen J.; Albert,James S.
The Sternarchellini (Gymnotiformes, Apteronotidae) is a clade of 10 electric fish species that inhabit deep river channels of the Amazon and Orinoco basins, attain moderate adult body sizes (15-50 cm TL), and have a predatory life style. Here we trace the evolutionary origin and diversification of Sternarchellini using standard phylogenetic and biogeographic procedures and a dataset of 70 morphological characters. The main results are: 1) the genus Sternarchellaincludes both species currently assigned to the genus Magosternarchus; and 2) neither of the multi-species assemblages of Sternarchellini in the Amazon and Orinoco basins are monophyletic. Historical biogeographic analysis suggests that sternarchelline evolution was linked to the large-scale river...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological specialization; Evolution; Historical Biogeography; Neotropical; Osteology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000300565

Evidence of incipient speciation in Astyanax scabripinnis species complex (Teleostei: Characidae)
Provedor de dados: 83
Autores: Castro,Jonathan P.; Moura,Maurício O.; Moreira-Filho,Orlando; Shibatta,Oscar A.; Santos,Mateus H.; Nogaroto,Viviane; Vicari,Marcelo R.; Almeida,Mara C. de; Artoni,Roberto F.
Two populations of the Astyanax scabripinniscomplex, isolated by a waterfall with over 100 meters depth and inhabiting different altitudes of the same river (1850 m a.s.l. and 662 m a.s.l.) were compared in reproductive data, geometric morphometry, tooth morphology, anal-fin rays counts, and karyotype, in order to test the hypothesis of speciation between the two populations. The results in the geometric morphometry analysis showed differences between the populations. Discriminant function analysis (DFA) and canonical variance analysis revealed sexual dimorphism. Secondary sexual characters, such as hooks in the anal fin rays of the males are absent in the lower altitude population. Both populations had the same macro karyotype structure, except for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allopatric populations; Cytogenetics; Evolution; Geometric morphometry; Paraíba do Sul River.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000200429

Phylogenetic relationships of the species of Acestridium Haseman, 1911 (Siluriformes: Loricariidae)
Provedor de dados: 83
Autores: Rodriguez,Mónica S.; Delapieve,Maria Laura S.; Reis,Roberto E.
A phylogeny of the species of the loricariid genus Acestridium and relevant outgroups is presented based on a parsimony analysis of 52 unweighted and unordered morphological characters. Acestridium is diagnosed as monophyletic based on the possession of the 17 exclusive synapomorphies. Two primary trees were found, and the strict consensus among those alternative trees resulted in the following relationships: ((A. dichromum + A. triplax)(A. gymnogaster + A. scutatum + (A. discus (A. colombiensis + A. martini)))). Acestridium was found to be sister to Niobichthys with this clade subsequently the sister-group to Oxyropsis + Hypoptopoma.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Evolution; Neotropical; Phylogeny.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200325

Karyotype characterization and ZZ/ZW sex chromosome heteromorphism in two species of the catfish genus Ancistrus Kner, 1854 (Siluriformes: Loricariidae) from the Amazon basin
Provedor de dados: 83
Autores: Oliveira,Renildo R. de; Feldberg,Eliana; Anjos,Maeda B. dos; Zuanon,Jansen.
We present karyotypic characteristics and report on the occurrence of ZZ/ZW sex chromosomes in Ancistrus ranunculus (rio Xingu) and Ancistrus sp. "Piagaçu" (rio Purus), of the Brazilian Amazon. Ancistrus ranunculus has a modal number of 2n=48 chromosomes, a fundamental number (FN) of 82 for both sexes, and the karyotypic formula was 20m+8sm+6st+14a for males and 19m+9sm+6st+14a for females. Ancistrus sp. "Piagaçu" presented 2n=52 chromosomes, FN= 78 for males and FN= 79 for females. The karyotypic formula was 16m+8sm+2st+26a for males and 16m+9sm+2st+25a for females. The high number of acrocentric chromosomes in karyotype of Ancistrus sp. "Piagaçu" differs from the majority of Ancistrini genera studied so far, and may have resulted from pericentric...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypostominae; Ancistrini; Cytogenetics; Evolution; Heterochromatin.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300010

Taxonomic revision of the deep channel electric fish genus Sternarchella (Teleostei: Gymnotiformes: Apteronotidae), with descriptions of two new species
Provedor de dados: 83
Autores: Evans,Kory M.; Crampton,William G. R.; Albert,James S.
ABSTRACT This paper provides a taxonomic revision of the Neotropical electric fish genus Sternarchella, with redescriptions of seven valid species and descriptions of two new species. A maximum parsimony analysis of 76 morphological characters from seven ingroup and seven outgroup taxa recovered a non-monophyletic Sternarchella, in which a clade comprising two species with a ventral mouth (S. orinoco + S. sima) is the sister group to a clade comprising seven species that possess a terminal or superior mouth. Nested within this higher-diversity clade is the genus Magosternarchus (recognized herein as a junior synonym of Sternarchella) comprising M. duccis and M. raptor. The Magosternarchus clade forms a polytomy with S. orthos and S. schotti. Sternarchella...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Evolution; Geometric morphometrics; Identification key; Magosternarchus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200210

Progress in Studies on the Equilibrium Shape of Headland-bay Shoreline.
Provedor de dados: 20
Autores: Li, Zhilong; Chen,  Zishen.
Research on the laws controlling the shoreline equilibrium shape has been one important topic of studying the evolvement and stabilization of sandy coasts. After a brief review of the progress on the equilibrium shape laws research, five models are introduced in detail. Advantages and disadvantages of these models are then discussed, which leads to the conclusion that the empirical formula integrating with analysis of mechanism should be the future direction of study on the headland-bay equilibrium shape laws. Finally, the importance of the study on the equilibrium shape of headland-bay in China is also discussed.
Tipo: Journal Contribution
Palavras-chave: Evolution.
Ano: 2007
URL: http://hdl.handle.net/1834/5855

Systematics and evolution in Polycystididae (Turbellaria, Kalyptorhyncia)
Provedor de dados: 27
Autores: Schockaert, E.R.
Possible evolutionary trends within Polycystididae have been indicated by Karling (1956) while studying the male genital organs of seyeral turbellarian groups. For the moment his ideas seem the most valuable basis for establishing an intrafamiliar system of Polycystididae, and have hence been applied formally (Schockaert, 1974). However, it can be demonstrated with several examples that the underlying principles prove to be unsatisfactory when one tries to apply Hennig's methodology:-the subfamily Duplacrorhynchinae Schockaert &amp; Karling, 1970, can be recognized as containing the most plesimorph polycystidids; a synapomorph character that would give us an indication of the monophyly of this taxon is lacking;-the homology of some glandular elements (al!...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Evolution; Taxonomy; Polycystididae; Turbellaria [Flatworms].
Ano: 1977
URL: http://www.vliz.be/imisdocs/publications/238823.pdf

Using the logical basis of phylogenetics as the framework for teaching biology
Provedor de dados: 84
Autores: Santos,Charles Morphy D.; Calor,Adolfo R.
The influence of the evolutionary theory is widespread in modern worldview. Due to its great explanatory power and pervasiveness, the theory of evolution should be used as the organizing theme in biology teaching. For this purpose, the essential concepts of phylogenetic systematics are useful as a didactic instrument. The phylogenetic method was the first objective set of rules to implement in systematics the evolutionary view that the organisms are all connected at some hierarchical level due to common ancestry, as suggested by Darwin and Wallace. Phylogenetic systematics was firstly proposed by the German Entomologist Willi Hennig in 1950 and had considerably importance in the decrease of the role of essentialism and subjectivity in classificatory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cladogram; Evolution; Philosophy of sciences; Phylogenetic systematics; Science teaching.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492008001800001

Innovative Mechanism of Rural Organization Based on Self-Organization
Provedor de dados: 31
Autores: Wang,   Xing jin; Gao,   Bing.
The paper analyzes the basic situation for the formation of innovative rural organizations with the form of self-organization; revels the features of self-organization, including the four aspects of openness of rural organization, innovation of rural organization is far away from equilibrium, the non-linear response mechanism of rural organization innovation and the random rise and fall of rural organization innovation. The evolution mechanism of rural organization innovation is reveled according to the growth stage, the ideal stage, the decline and the fall stage. The paper probes into the basic restriction mechanism of the self-organization evaluation of rural organization from three aspects, including target recognition, path dependence and knowledge...
Tipo: Journal Article
Palavras-chave: Self-organization; Rural organization innovation; Evolution; Innovation mechanism; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/113503

An Emergent Economics of Ecosystem Management
Provedor de dados: 31
Autores: Hearnshaw,   Edward J.S.; Cullen,   Ross; Hughey,   Kenneth F.D.
Economics is an evolving and emerging field of study, so is the management of ecosystems. As such, this paper delineates the co-evolution of economic evaluation that reflects the various recognized ecosystem management approaches of anticipative, adaptive and capacitive ecosystem management. Each management approach is critiqued and from this theoretical analysis an emergent approach for the management of ecosystem is put forward, which accordingly suggests an alternative methodological approach for economic evaluations.
Tipo: Conference Paper or Presentation
Palavras-chave: Complexity; Creativity; Economic evaluation; Ecosystem management; Evolution; Open systems; Rationality; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/31957

Economic Competition and Evolution: Are there Lessons from Ecology?
Provedor de dados: 31
Autores: Tisdell,   Clement A.
After discussing generally models in ecology and economics that combine competition, optimization and evolution, this article concentrates on models of intraspecific competition.  It demonstrates the importance of diversity/inequalities within populations of species and other environments for the sustainability of their populations, given the occurrence of environmental change.  This is demonstrated both for scramble (open-access) and contest competition.  Implications are drawn for human populations and for industrial organization.  The possibility is raised that within industry competition may not always exist between firms in all stages of the development of a new industry.  Policy implications are considered.  For example, it is argued that policies...
Tipo: Working or Discussion Paper
Palavras-chave: Competition policy; Ecology; Economic efficiency; Evolution; Intraspecific competition; Market development; Environmental Economics and Policy; L100; J100; Q150.
Ano: 2003
URL: http://purl.umn.edu/90526

Recursos humanos: uma visão estratégica estudo de caso na Empresa Beta
Provedor de dados: 31
Autores: Contijo,   Arimar Colen; Godinho,   Luiz Antonio de Carvalho; Matos,   Ricardo Nogueira de; Almeida,   Rinaldo Machado de.
The purpose of this article is to put forward a discussion on the evolution and structure of the roles played by the personnel and human resources department in the Beta Enterprise, identifying the reality, indexers and results for that company. The study articulates inter-linked elements for the evaluation of the evolution: the environment and its changes; the organization through updated human resources politicies. After identifying these events for the past 10 years a decriptive/qualitative survey was developed, through the statements by the representatives of the human resources area in the company ( BETA Enterprise ) whose headquarters are in Belo Horizonte, featuring an industrial plant in Vale do Aço, Minas Gerais, for the collection of data on its...
Tipo: Journal Article
Palavras-chave: The role of personnel and human resources; Evolution; Policies and practices.
Ano: 2004
URL: http://purl.umn.edu/43678

DIETARY EVOLUTION OVER TIME IN EUROPE, BETWEEN CYCLOPS AND PHAECIANS . AN OUTLOOK ON THE ROLE OF SUPPLY-SIDE FACTORS IN DRIVING CHANGES IN THE FOOD PATTERNS
Provedor de dados: 31
Autores: Finardi,   Corrado; Arfini,   Filippo; Turrini,   Aida.
The present study intends to shed light, both from a descriptive and investigative point of view on the dietary evolution taking place in Europe during last 45 years, using secondary data from FAO FBS, which can cover the entire time span considered and allow for several extrapolation and timeseries analysis, differently than single survey data.. After a clustering of selected european national diets, using specific metrics with respect both to internal and external variety (as measured by appropriate indicators), we intended to check the actual distance that average, national diets have in front of the so called Food Pyramid, which consists in a balance of several food items in adequate proportions and in fact glorifies the healthy virtues of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Diets; Evolution; Clustering; Food pyramid; Europe; Trade; GI; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; E37; Q18.
Ano: 2010
URL: http://purl.umn.edu/116443

Competition, Evolution and Optimisation: Comparisons of Models in Economics and Ecology
Provedor de dados: 31
Autores: Tisdell,   Clement A.
Discusses concepts of competition in economics and ecology and the relevance of evolution to both subjects. It is suggested that although speciation or increasing biodiversity tends to occur in undisturbed ecological systems, the opposite trend may occur in economic systems. Competition based on optimisation plays a significant role in theories of the evolution of species and some theories of the evolution of business or industrial structures. But evolution does not result in optimal selection of species or businesses for the future, and there is scope for doubt about what is being optimised by survivors in the evolutionary process. Ecological or biological theories of intra-specific competition involving scramble and contest competition are outlined and...
Tipo: Working or Discussion Paper
Palavras-chave: Biology; Competition; Evolution; Market development; Optimisation; Environmental Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/48384

The Research of the Balanced Development of China’s Urban-rural Spatial Integration Based on the Evolution of Regional Spatial Structure
Provedor de dados: 31
Autores: Duan,   Lu-feng; Zhang,   Hong.
The general law of regional spatial evolution is researched. In the process of the evolution of four stages, namely the early stage of traditional agriculture and industrialization, the middle stage of industrialization, the later stage of industrialization and post-industrialization, the types of space are homogenized space, polarized space, pole-axis space and integrated space respectively; the choosing of the spatial location is influenced by economy, society and environment, and the spatial structure extends along with three-dimensional space. Based on the fact that China’s urban-rural spatial structure evolution develops rapidly, and the outstanding characteristics of dual structure becomes the main obstacle to urban-rural balanced development, the...
Tipo: Journal Article
Palavras-chave: Space; Urban-rural; Evolution; Integration; Coordination; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/113932

Morphological cladistic analysis of Pseudobombax Dugand (Malvaceae, Bombacoideae) and allied genera
Provedor de dados: 88
Autores: Carvalho-Sobrinho,Jefferson Guedes de; Queiroz,Luciano Paganucci de.
(Morphological cladistic analysis of Pseudobombax Dugand (Malvaceae, Bombacoideae) and allied genera). Pseudobombax Dugand belongs to the family Malvaceae subfamily Bombacoideae and aggregates 29 species restricted to the Neotropics. A morphological cladistic analysis of Pseudobombax and allied genera was carried out to test the monophyly of the genus and to provide hypotheses on its phylogeny. Parsimony analyses were based on 40 morphological characters and 28 species, 14 belonging to Pseudobombax and 14 to other species of Bombacoideae, Matisieae (Malvoideae) and Ochromeae. Nine most parsimonious trees (144 steps, ci 0.40, ri 0.67) were produced when 10 multistate characters were taken as ordered while only two most parsimonious trees (139 steps, ci...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biogeography; Evolution; Morphology; Phylogeny; Taxonomy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000200007

Behavioral evidence for cone-based ultraviolet vision in divergent bat species and implications for its evolution
Provedor de dados: 103
Autores: Fujun,Xuan; Kailiang,Hu; Tengteng,Zhu; Paul,Racey; Xuzhong,Wang; Yi,Sun.
We investigated the reactions of four bat species from four different lineages to UV light: Hipposideros armiger (Hodgson, 1835) and Scotophilus kuhlii Leach, 1821, which use constant frequency (CF) or frequency modulation (FM) echolocation, respectively; and Rousettus leschenaultii (Desmarest, 1820) and Cynopterus sphinx (Vahl, 1797), cave and tree-roosting Old World fruit bats, respectively. Following acclimation and training involving aversive stimuli when exposed to UV light, individuals of S. kuhlii and C. sphinx exposed to such stimuli displayed conditioned reflexes such as body crouching, wing retracting, horizontal crawling, flying and/or vocalization, whereas individuals of H. armiger and R. leschenaultii, in most cue-testing sessions, remained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chiroptera; Evolution; Fear conditioning; UV vision.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200002

First cases of exclusive paternal care in stink bugs (Hemiptera: Pentatomidae)
Provedor de dados: 103
Autores: Requena,Gustavo S.; Nazareth,Taís M.; Schwertner,Cristiano F.; Machado,Glauco.
We describe paternal care in two pentatomid bugs, Lopadusa (Lopadusa) augur Stål, 1860 and Edessa nigropunctata Berg, 1884. Field and laboratory observations showed that males remain with their eggs and early hatched nymphs, while females abandon the eggs after oviposition. Guarding males defensive behaviors towards their clutches were similar to those described for guarding females of pentatomids. Since there is no detailed information on the internal phylogeny of Pentatomidae, it is not possible to make a robust inference on whether paternal care in L. augur and E. nigropunctata has arisen independently or not. If the latter, the two new cases of paternal care we describe here represent the fifth event of independent evolution of this rare behavioral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Edessa nigropunctata; Egg guarding; Evolution; Lopadusa augur.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600026

Biogeography on the early distribution of cuckoos (Aves: Cuculiformes)
Provedor de dados: 103
Autores: Posso,Sérgio R.; Donatelli,Reginaldo J.
Cuckoos are widely distributed, but are concentrated in the tropics, where they occupy a wide range of habitats. Both terrestrial and arboreal behaviors can be found in this group, but there is no consensus on as to whether these behaviors have arisen more than once. Moreover, the historical distribution of cuckoos is poorly understood. This paper presents a biogeographyc analysis of the early history of the distribution of these birds. The analysis was performed by using the Principle of Parsimony based on primary and secondary "Brooks Parsimony Analysis" (BPA). Despite some exceptions, the primary BPA corroborated events of vicariance (general pattern) in the early distribution of cuckoos and a terrestrial ancestor widespread in the Gondwana. The most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parsimony analysis; BPA; Cuculidae; Evolution.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000300001

The origin of species by means of natural drift
Provedor de dados: 97
Autores: MATURANA-ROMESIN,HUMBERTO; MPODOZIS,JORGE.
In this article we propose that the mechanism that gave rise to the diversity of living systems that we find today, as well as to the biosphere as coherent system of interrelated autonomous living systems, is natural drift. And we also propose that that which we biologists connote with the expression natural selection is a consequence of the history of the constitution of the biosphere through natural drift, and not the mechanism that generates that history. Moreover, we do this by proposing: a) that the history of living systems on earth is the history of the arising, conservation, and diversification of lineages through reproduction, and not of populations; b) that biological reproduction is a systemic process of conservation of a particular...
Tipo: Journal article
Palavras-chave: Evolution; Natural drift; Natural selection; Lineage; Organism; Species.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000200005

The Darwinian revolution
Provedor de dados: 97
Autores: CHAVES,ÓSCAR M.
The scientific revolution probably began at 16th century with the heliocentric theory of the eminent astronomer Nicolaus Copernicus, but it was culminated with the masterful discoveries of Galileo Galilei and Isaac Newton at 17th century who revealed that planet movements around the sun and other similar phenomena can be explained by simple mechanical laws of physics and astronomy. However, the origin, complexity and configuration of living beings remained in the mystery until 19th century, with the publication of "On the origin of species". In this essay I discuss the importance of the Darwinian scientific revolution, its beginnings, and the main objections of creationists to his evolutionary ideas. Darwin demonstrated that the origin and complexity of...
Tipo: Journal article
Palavras-chave: Creationism; Darwin; Evolution; Religion; Scientific revolution.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000200004

Beyond selection
Provedor de dados: 97
Autores: VARGAS,ALEXANDER O.
It has been argued that the study of natural selection and quantitative genetics should have a central role in evolutionary thinking and undergraduate teaching in Chile. Extensive operational use of the concept of natural selection may seem consistent with this argument. However, advances of evolutionary knowledge in independent fields such as phylogenetic analysis, developmental evolution, and paleontology cannot be ignored. I argue here that the role of natural selection in contemporary evolutionary biology can be compared to that of Newtonian mechanics in contemporary physics: it can describe a given domain of observations, but it is insufficient to handle the different sources of evolutionary knowledge. Overemphasis on natural selection as the...
Tipo: Journal article
Palavras-chave: Evolution; History; Development; Epigenesis; Drift.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000400012

Danko Brncic and the flower-flies
Provedor de dados: 97
Autores: CARSON,HAMPTON L.
This is a personal essay commemorating Brncic as a keen naturalist/evolutionist in the best Darwinian sense. His innate curiosity, so important in a scientist, led him to the discovery of cenain unique drosophilid flies in Chile. The life cycle of one species of flower-fly (Drosophila flavopilosa) is of special interest. Females oviposit in fresh flowers of a solanaceous plant that is widespread in Chilean valleys. Twenty years of combined ecological and genetic work, carried out on this species, pioneers the use of a highly specialized Drosophila species in the study of population genetics and evolution. Many eco-genetic features are revealed that are important supplements to observations made on the widely-studied generalist species of the genus
Tipo: Journal article
Palavras-chave: Flower-breeding Drosophila; Genetic specialization; Ecology; Population genetics; Evolution.
Ano: 2001
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000000008

Evolution of the histones: free play with exon shuffling
Provedor de dados: 97
Autores: TORO,G. CECILIA.
In higher eukaryotes, the nuclear DNA is organized for transcription, replication and mitosis in competent chromatin and chromosomes. The basic unit of chromatin is the nucleosome. This entity is formed by 168 base pairs of DNA wound around an octamer of histones, this octamer of histones consist of two copies of H2A, H2B, H3 and H4. The DNA is sealed in its input and output point by a histone linker: histone H1. Histones were supposed to be very conserved proteins. However, during the past few years it was found that these proteins present a high degree of divergency in several lower eukaryotes. In Trypanosoma, it was found that histones H3 and H4, which are at the center of the nucleosomal organization, showed more than 30 % of divergency, while histone...
Tipo: Journal article
Palavras-chave: Histones; Evolution.
Ano: 2001
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000000020

Extended parental care in crustaceans: an update
Provedor de dados: 97
Autores: THIEL,MARTIN.
Many crustacean species show extended parental care (XPC) for fully developed juvenile offspring. Herein, the present state of knowledge of the major patterns and consequences of XPC is reviewed, and furthermore important future research topics are identified. Crustaceans with XPC are found in marine, freshwater and terrestrial environments, but care for late juvenile stages appears to be more common in terrestrial environments. In all species, females participate or even take the main share of XPC activities. Crustaceans that carry their offspring during XPC commonly release early juvenile stages, while species inhabiting particular microhabitats may host offspring until these have reached subadult or adult stages. Apart from providing a suitable and safe...
Tipo: Journal article
Palavras-chave: Crustacea Peracarida reproduction parental care habitat; Evolution.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200007

Genome dynamics, genetic complexity and macroevolution
Provedor de dados: 97
Autores: GALLARDO,MILTON.
Genome data analysis indicates that the major evolutionary transitions have been driven by substantial increases in genomic complexity. These increases, accounting for novelty in evolution, have proceeded mainly by gene duplication. This idea, advanced by &lt;A HREF="#OHNO"&gt;Ohno (1968)&lt;/A&gt;, remains current in the study of several organisms whose genomes have been sequenced. Maize, yeast, and humans contain more paralogons than would be expected to occur by chance, and this supports the contention that gene families were not formed de novo, but by large-scale DNA duplications. Lineage hybridization emerges as an efficient and widespread mechanism to create evolutionary novelty by recruiting redundant genes to new roles. Lateral gene transfer...
Tipo: Journal article
Palavras-chave: Gene duplication; Genome; Genetics; Evolution; Macroevolution; Evolutionary theory.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000400013

Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
Provedor de dados: 97
Autores: Hernández-Salinas,Uriel; Ramírez-Bautista,Aurelio; Pavón,Numa P; Rosas Pacheco,Luis F.
BACKGROUND: Body size exerts a strong influence on the physiology, morphology, ecology, and evolution of other life history traits in vertebrates. We compared the morphometry and allometry of two lizard species (Anolis nebulosus and Aspidoscelis lineattissima) occurring on mainland and island populations on the Pacific Coast of Mexico in order to understand the effect of an insular environment on body size and other morphometric structures. RESULTS: Results showed that both males and females of A. nebulosus from San Pancho Island were larger in body size than those from the mainland. Moreover, males of A. lineattissima from Cocinas Island exhibited larger forms of most measured morphometric traits than those from the mainland, whereas females from both...
Tipo: Journal article
Palavras-chave: Allometry; Anolis nebulosus; Aspidoscelis lineattissima; Islands; Evolution; Sexual dimorphism.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100018

Within selection
Provedor de dados: 97
Autores: VALENZUELA,CARLOS Y.
The synthetic theory of evolution proposes that biotic variations generated by mutation are mostly fixed, lost or maintained polymorphic by natural selection, with a marginal effect due to genetic drift. Based on the theory of autopoiesis some authors have proposed that selection is unable to explain most evolutionary changes, and natural or phenotype drift and epigenesis are the mechanisms that explain most of evolution. This view misunderstands basic evolutionary notions. Selection is a natural process that occurs with or without evolution; it does not explain evolution, it is a factor of the evolutionary process. The concept of autopoiesis implies an invariant condition of living beings, thus, it cannot explain and even less produce evolution conceived...
Tipo: Journal article
Palavras-chave: Autopoiesis; Evolution; Natural drift; Neutral evolution; Selection; Synthetic theory.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000100009

Cooperation and bacterial pathogenicity: an approach to social evolution
Provedor de dados: 97
Autores: Alfonso Molina,C; Vilchez,Susana.
Kin selection could provide an explanation for social behavior in bacteria. The production of public goods such as extracellular molecules is metabolically costly for bacteria but could help them to exploit nutrients or invade a host. Some bacterial cells called social cheaters do not produce public goods; however, they take advantage of these extracellular molecules. In this review, the relationships between social behavior, cooperation, and evolution of bacterial pathogenicity are analyzed. This paper also examines the role of horizontal transfer of genes encoding for virulence factors and how the movement of mobile genetic elements would influence the pathogenicity and social relationships. Moreover, the link between ecological relationships and...
Tipo: Journal article
Palavras-chave: Cooperation; Evolution; Pathogenicity; Public goods.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100013

An interesting new species of Sphaerocysta (Heteroptera, Tingidae) from Argentina, with the description of its ffth instar nymph
Provedor de dados: 99
Autores: Guidoti,Marcus; Montemayor,Sara I.
A new Neotropical species of Sphaerocysta Stål, (Hemiptera, Heteroptera, Tingidae) is described. Sphaerocysta costai n. sp. was collected in the Argentinian Yungas, in the provinces of Jujuy (Calilegua) and Salta (Urundel). The most important diagnostic characters are illustrated for adults and fifthinstar nymphs. This new species provides relevant evidence for the understanding of evolutionary trends within the family as its nymphal morphology exhibits unique features among Tingidae. Comments on the systematics of Sphaerocysta, and an identification key to its species are provided.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sphaerocysta costai n. sp. Yungas; Evolution; Morphological characters.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802014000100003

Floral glands in asclepiads: structure, diversity and evolution
Provedor de dados: 39
Autores: Demarco,Diego.
ABSTRACT Species of Apocynaceae stand out among angiosperms in having very complex flowers, especially those of asclepiads, which belong to the most derived subfamily (Asclepiadoideae). These flowers are known to represent the highest degree of floral synorganization of the eudicots, and are comparable only to orchids. This morphological complexity may also be understood by observing their glands. Asclepiads have several protective and nuptial secretory structures. Their highly specific and specialized pollination systems are associated with the great diversity of glands found in their flowers. This review gathers data regarding all types of floral glands described for asclepiads and adds three new types (glandular trichome, secretory idioblast and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Apocynaceae; Asclepiadoideae; Diversity; Evolution; Flower; Secretory structures.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300477

First cytomolecular characterization of three Neotropical woody bamboos (Bambusoideae, Poaceae) suggests ancient diploidized karyotypes
Provedor de dados: 39
Autores: Zappelini,Julia; Souza,Luiz Gustavo; Guerra,Miguel Pedro; Pescador,Rosete.
ABSTRACT Although karyotype features are useful data for evolutionary studies, cytogenetic data in Bambusoideae are mainly based only on chromosome counts. The first comparative cytogenetic analysis of three Neotropical woody bamboo species - Guadua chacoensis, G. angustifolia and Chusquea tenella - was undertaken based on new and reviewed chromosome counts, CMA/DAPI double staining, fluorescent in situ hybridization (FISH) with 35S and 5S rDNA probes, and genome size estimation. The two species of Guadua were found to have 2n = 46 chromosomes, while the first record for C. tenella was 2n = 44. Only one pair of CMA+/DAPI- was detected on the terminal region of metacentric chromosomes in all three species. Likewise, one pair of 5S and 35S rDNA sites was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chusquea; Cytogenetics; Diploidization; Evolution; Guadua; Polyploidy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400673

Anatomia comparada das folhas e evolução das Podocarpineae
Provedor de dados: 39
Autores: Woltz,Ph; Gajardo,R; Ferreira,A.G.
The anatomy of 112 species out of the 184 at present recognized is compared. The evolutionary sequence proposed shows in several different "series" the passage by successive transformations from an ancestral type with short one-nerved leaves, well-developed sub-epidermis and many resin canals to those with long wide leaves, first one-nerved then several-nerved, with reduced sub-epidermis and few resin canals. An over-evolved condition sometimes produces at the end of a "série" an apparent reversion to the ancestral type: leaves short or reduced to fleshy scales with late proliferation of canals separated in the mesophyll. A striking correlation between foliar anatomy and geographic latitude suggests, as with vascular evolution in seedlings at the cotyledon...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Podocarpineae; Evolution; Anatomy comparative.
Ano: 1987
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000200002

Opsin genes: research perspectives with Neotropical cichlids (Perciformes: Cichlidae) and their relevance in floodplain studies
Provedor de dados: 3
Autores: Fabrin, Thomaz Mansini Carrenho; Gasques, Luciano Seraphim; Prioli, Sonia Maria Alves Pinto; Prioli, Alberto José.
Vision not only plays an important role in the behavior and exploration capacity of new ecology niches but also influences the evolution of species exposed to the heterogeneity of light. Floodplain environments have high habitat heterogeneity and, thus, different light gradients. Cichlids are a group of vertebrates that has stirred interest in evolutionary studies due to their morphological and behavioral diversity and their widely used vision. The molecular basis of vertebrates’ vision occurs through the interaction of opsin proteins and retinal chromophores. Proteins are expressed by opsin genes where each is responsible for absorbing certain light wavelengths.  Current review analyzes the main characteristics of opsin genes family and the possibility of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.02.00.00-5 ecology; Evolution; Visual pigments; Visual system Genética.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28295

The current status of the New World monkey phylogeny
Provedor de dados: 42
Autores: SCHNEIDER,HORACIO.
Four DNA datasets were combined in tandem (6700 bp) and Maximum parsimony and Neighbor-Joining analyses were performed. The results suggest three groups emerging almost at the same time: Atelidae, Pitheciidae and Cebidae. The total analysis strongly supports the monophyly of the Cebidae family, grouping Aotus, Cebus and Saimiri with the small callitrichines. In the callitrichines, the data link Cebuela to Callithrix, place Callimico as a sister group of Callithrix/Cebuella, and show Saguinus to be the earliest offshoot of the callitrichines. In the family Pithecidae, Callicebus is the basal genus. Finally, combined molecular data showed congruent branching in the atelid clade, setting up Alouatta as the basal lineage and Brachyteles-Lagothrix as a sister...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: New World monkeys; Platyrrhine; Taxonomy; Molecular; Evolution.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000200005

Long-wavelength sensitive opsin (LWS) gene variability in Neotropical cichlids (Teleostei: Cichlidae)
Provedor de dados: 42
Autores: FABRIN,THOMAZ M.C.; PRIOLI,SONIA MARIA A.P.; PRIOLI,ALBERTO JOSÉ.
ABSTRACT Cichlid fishes are an important group in evolutionary biology due to their fast speciation. This group depends widely of vision for feeding and reproduction. During the evolutionary process it plays a significant role in interspecific and intraspecific recognition and in its ecology. The molecular basis of vision is formed by the interaction of the protein opsin and retinal chromophore. Long-wavelength sensitive opsin (LWS) gene is the most variable among the opsin genes and it has an ecological significance. Current assay identifies interspecific variation of Neotropical cichlids that would modify the spectral properties of the LWS opsin protein and codons selected. Neotropical species present more variable sites for LWS gene than those of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Convergence; Ecology; Evolution; Visual system.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100213

Tectonics and paleogeography of the Marajó Basin, northern Brazil
Provedor de dados: 42
Autores: COSTA,JOÃO B. S.; HASUI,YOCITERU; BEMERGUY,RUTH L.; SOARES-JÚNIOR,ADILSON V.; VILLEGAS,JAVIER M. C.
The Marajó Basin area presents geologic and geomorphologic features chiefly due to the Mesozoic extension and post-Miocene neotectonics. The extension event with an Early and a Late Cretaceous phases originated four sub-basins that constitutes the Marajó Basin, with a thick continental clastic sequence showing marine influence. NW and NNW normal faults and NE and ENE strike-slip faults controlled the basin geometry. The extension, related to the Equatorial Atlantic opening, propagated into the continent along crustal weakness zones of the Precambrian Tumucumaque, Amapá and Araguaia orogenic belts. The neotectonic event is a strike-slip regime which developed transtensional basins filled in by Upper Tertiary shallow marine (Pirabas Formation) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marajó Basin; Structure; Evolution; Paleogeography; Geomorphology.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300013

A new Mammutidae (Proboscidea, Mammalia) from the Late Miocene of Gansu Province, China
Provedor de dados: 42
Autores: MOTHÉ,DIMILA; AVILLA,LEONARDO S.; ZHAO,DESI; XIE,GUANGPU; SUN,BOYANG.
ABSTRACT The "Yanghecun specimen", a proboscidean specimen represented by a mandible from Miocene of China and previously described as Gomphotheriidae, is here reviewed and described as a new genus and species of Mammutidae: Sinomammut tobieni. This taxon is a longirostrine mastodon, lacking lower tusks, and bearing a wide last molar with oblique and non-inflated lophids, broad transverse interlophids, and yoke-like wear figures. Phylogenetic analysis of Mammutidae based on dental and mandibular features recovered S. tobieni as sister group of the mastodon Mammut. The longirostrine condition and the well-developed lower incisors seem to be primitive for Mammutidae, while the brevirostry is the derived condition, probably emerged during the middle Miocene...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Evolution; Longirostrine symphysis; Mammutidae; Miocene; Proboscidea.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100065

Simulated self-organization of death by inherited mutations
Provedor de dados: 42
Autores: Martins,Jorge S. Sá; Stauffer,Dietrich; Oliveira,Paulo M.C. de; Oliveira,Suzana Moss de.
An agent-based computer simulation of death by inheritable mutations in a changing environment shows a maximal population, or avoids extinction, at some intermediate mutation rate of the individuals. Our results indicate that death seems needed to allow for evolution of the fittest, as required by a changing environment.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Changing environment; Computer modeling; Evolution; Mutation; Selection.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400010

A new ascarid species in cynodont coprolite dated of 240 million years
Provedor de dados: 42
Autores: SILVA,PRISCILLA A. DA; BORBA,VICTOR H.; DUTRA,JULIANA M.F.; LELES,DANIELA; DA-ROSA,ATILA A.S.; FERREIRA,LUIZ F.; ARAUJO,ADAUTO.
Cynodonts represent the transition from reptiles to mammals. They are classified as synapsids, or tetrapod animals with mammalian characteristics. We present here the finding of helminth eggs in a coprolite identified as of cynodont origin dated of nearly 240 million years. Microscopy revealed the presence of very well preserved intestinal parasite eggs. Up to now we identified an ascarid egg by morphological characteristics. Based on a previous description of the new genus Ascarites Poinar Jr and Boucot 2006 in coprolites of iguanodons from Belgium, we propose a new species,Ascarites rufferi n.sp. in cynodonts, a host that inhabited the Southern Region of Brazil in the Triassic period.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascarids; Coprolites; Cynodont; Evolution; Paleoparasitology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100265

Acoustic evolution in crickets: need for phylogenetic study and a reappraisal of signal effectiveness
Provedor de dados: 42
Autores: Desutter-Grandcolas,Laure; Robillard,Tony.
Cricket stridulums and calls are highly stereotyped, except those with greatly modified tegmina and/or vena-tion, or ''unusual'' frequency, duration and/or intensity. This acoustic diversity remained unsuspected until recently, and current models of acoustic evolution in crickets erroneously consider this clade homogeneous for acoustic features. The few phylogenetic studies analyzing acoustic evolution in crickets demonstrated that acoustic behavior could be particularly labile in some clades. The ensuing pattern for cricket evolution is consequently extremely complex. We argue that: (1) phylogeny should always be considered when analyzing acoustic evolution, whatever characters are considered (signals, stridulums or behaviors). Consequently, future...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acoustic communication; Evolution; Phylogeny; Calling song effectiveness; Crickets.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200019

Evolutionary change - patterns and processes
Provedor de dados: 42
Autores: Salzano,Francisco M.
The present review considered: (a) the factors that conditioned the early transition from non-life to life; (b) genome structure and complexity in prokaryotes, eukaryotes, and organelles; (c) comparative human chromosome genomics; and (d) the Brazilian contribution to some of these studies. Understanding the dialectical conflict between freedom and organization is fundamental to give meaning to the patterns and processes of organic evolution.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Molecular evolution; Principles of evolution; Evolution; Plants; Human evolution.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000400006

Evolutionary aspects on the origin, distribution and ramifications of the ischiadicus nerve in the giant anteater (Myrmecophaga tridactyla)
Provedor de dados: 45
Autores: Ribeiro,L.A.; Iglesias,L.P.; Silva,F.O.C.; Silva,Z.; Santos,L.A.; Paula,Y.H.; Magalhães,H.I.R.; Barros,R.A.C.
ABSTRACT This work aimed to describe the origin, distribution, and ramifications of the ischiadicus nerve in the giant anteater and to provide anatomical data which could explain not only the evolutionary aspects but also provide important information for other related works. For the present study, four specimens were used, prepared by perfusion of 10% formaldehyde solution via the femoral artery, for conservation and dissection. The origin of the right and left ischiadicus nerves in the giant anteater from the ventral ramification of the third lumbar (L3) and the first (S1), second (S2), and third (S3) sacral spinal nerves. These nerves were symmetrical in all animals studied. The distribution and ramification occurred to the superficial, middle, and deep...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrmecophagidae; Pilosa; Evolution; Innervations.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000401149

The threat from creationism to the rational teaching of biology
Provedor de dados: 48
Autores: CORNISH-BOWDEN,ATHEL; CÁRDENAS,MARÍA LUZ.
Most biologists outside the USA and a few other countries, like Australia and Canada, are under the impression that the threat to the teaching of biology represented by creationism does not concern them directly. This is unfortunately no longer true: the recent growth of creationism, especially in its pseudo-scientific manifestation known as "intelligent design", has been obvious in several countries of Western Europe, especially the UK, Germany and Poland, and it is beginning to be noticeable in Brazil, and maybe elsewhere in Latin America. The problem is complicated by the fact that there are not just two possibilities, evolution and creationism, because creationism comes in various incompatible varieties. Turkey is now a major source of creationist...
Tipo: Journal article
Palavras-chave: Education; Creationism; Intelligent design; Fundamentalism; Evolution; Natural selection.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200002

Some considerations about the theory of intelligent design
Provedor de dados: 48
Autores: CARREÑO,JUAN E; HANSEN,FERNANDO; IRARRÁZABAL,MATÍAS; PHILIPPI,RODOLFO; CORREA,MATÍAS; BORJA,FRANCISCO; ADRIASOLA,CRISTÓBAL; SILVA,FRANCISCO; SERANI,ALEJANDRO.
The so-called theory of intelligent design (ID) has gained a growing reputation in the Anglo-Saxon culture, becoming a subject of public debate. The approaches that constitute the core of this proposal, however, have been poorly characterized and systematized. The three most significant authors of ID are certainly Michael Behe, William Dembski and Stephen Meyer. Beyond the differences that can be distinguished in the work of each of them, the central fact in their arguments is the complexity of living organisms, which according to these authors, escapes any kind of natural explanation. In effect, according to the authors of ID, the irreducible complexity that can be detected in the natural world would allow to infer design in a scientifically valid way,...
Tipo: Journal article
Palavras-chave: Epistemology; Evolution; Intelligent design; Science.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200011

The adaptive value of shoot differentiation in deciduous trees and its evolutionary relevance
Provedor de dados: 51
Autores: Dörken,Veit M.; Stützel,Thomas.
Pronounced long shoot/short shoot differentiation is typical for deciduous angiosperm trees. It also occurs in a number of gymnosperms and very few evergreen angiosperm trees. The study of 719 angiosperm tree species (602 deciduous and 117 evergreen species) demonstrated that the deciduous condition is nearly always associated with shoot differentiation. Detailed measurements in 38 angiosperms showed that the leaf area of an entire short shoot equals the leaf area of a single long shoot leaf of the same species and individual. In the few cases where the leaf area of the short shoot is slightly larger than that of a single long-shoot leaf, the short shoot leaves shade each other and the projection of the short shoot equals the area of a single long shoot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shoot differentiation; Deciduous trees; Angiosperms; Gymnosperms; Evolution; Phytogeography.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722009000200017

Evolution of HTLV-1 proviral load in patients from Salvador, Brazil
Provedor de dados: 55
Autores: Olavarria,Viviana Nilla; Gomes,Alline do Nascimento; Kruschewsky,Ramon de Almeida; Galvão-Castro,Bernardo; Grassi,Maria Fernanda Rios.
INTRODUCTION: Variations in human T cell lymphotropic virus type 1 (HTLV-1) proviral load (PVL) in infected individuals over time are not well understood. Objective: To evaluate the evolution of proviral load in asymptomatic individuals and HAM/TSP patients in order to help determine periodicity for measuring proviral load. METHODS: A group of 104 HTLV-1 infected patients, followed at the HTLV reference center in Salvador, Brazil, were included in the study (70 asymptomatic and 34 HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) patients). HTLV-1 PVL was measured using real-time polymerase chain reaction (PCR) at baseline and again at another point, either &lt; 12 months, between 12-24 months, or &amp;gt; 24 months. RESULTS: HAM/TSP...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asymptomatic; Evolution; HTLV-1; Proviral load; HAM/TSP.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000400008

Genetic characterization and evolutionary inference of TNF-α through computational analysis
Provedor de dados: 55
Autores: Awasthi,Gauri; Singh,Suchita; Dash,A.P.; Das,Aparup.
TNF-α is an important human cytokine that imparts dualism in malaria pathogenicity. At high dosages, TNF-α is believed to provoke pathogenicity in cerebral malaria; while at lower dosages TNF-α is protective against severe human malaria. In order to understand the human TNF-α gene and to ascertain evolutionary aspects of its dualistic nature for malaria pathogenicity, we characterized this gene in detail in six different mammalian taxa. The avian taxon, Gallus gallus was included in our study, as TNF-α is not present in birds; therefore, a tandemly placed duplicate of TNF-α (LT-α or TNF-β) was included. A comparative study was made of nucleotide length variations, intron and exon sizes and number variations, differential compositions of coding to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malaria; TNF-α; TNF-β; Evolution; Computational analyses.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000500006

One hundred million years of interhemispheric communication: the history of the corpus callosum
Provedor de dados: 56
Autores: Aboitiz,F.; Montiel,J.
Analysis of regional corpus callosum fiber composition reveals that callosal regions connecting primary and secondary sensory areas tend to have higher proportions of coarse-diameter, highly myelinated fibers than callosal regions connecting so-called higher-order areas. This suggests that in primary/secondary sensory areas there are strong timing constraints for interhemispheric communication, which may be related to the process of midline fusion of the two sensory hemifields across the hemispheres. We postulate that the evolutionary origin of the corpus callosum in placental mammals is related to the mechanism of midline fusion in the sensory cortices, which only in mammals receive a topographically organized representation of the sensory surfaces. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Commissures; Evolution; Interhemispheric transfer; Lateralization; Synchronization.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000400002

Evolution of circadian organization in vertebrates
Provedor de dados: 56
Circadian organization means the way in which the entire circadian system above the cellular level is put together physically and the principles and rules that determine the interactions among its component parts which produce overt rhythms of physiology and behavior. Understanding this organization and its evolution is of practical importance as well as of basic interest. The first major problem that we face is the difficulty of making sense of the apparently great diversity that we observe in circadian organization of diverse vertebrates. Some of this diversity falls neatly into place along phylogenetic lines leading to firm generalizations: i) in all vertebrates there is a "circadian axis" consisting of the retinas, the pineal gland and the...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Circadian rhythms; Evolution; Vertebrates; Pineal; SCN; Retina; Melatonin.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000300003

A protein with amino acid sequence homology to bovine insulin is present in the legume Vigna unguiculata (cowpea)
Provedor de dados: 56
Autores: Venâncio,T.M.; Oliveira,A.E.A.; Silva,L.B.; Machado,O.L.T.; Fernandes,K.V.S.; Xavier-Filho,J.
Since the discovery of bovine insulin in plants, much effort has been devoted to the characterization of these proteins and elucidation of their functions. We report here the isolation of a protein with similar molecular mass and same amino acid sequence to bovine insulin from developing fruits of cowpea (Vigna unguiculata) genotype Epace 10. Insulin was measured by ELISA using an anti-human insulin antibody and was detected both in empty pods and seed coats but not in the embryo. The highest concentrations (about 0.5 ng/µg of protein) of the protein were detected in seed coats at 16 and 18 days after pollination, and the values were 1.6 to 4.0 times higher than those found for isolated pods tested on any day. N-terminal amino acid sequencing of insulin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insulin; Insulin-like; Cowpea; Vigna unguiculata; Developing fruits; Sequence homology; Evolution.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000900004

The leaves of green plants as well as a cyanobacterium, a red alga, and fungi contain insulin-like antigens
Provedor de dados: 56
Autores: Silva,L.B.; Santos,S.S.S.; Azevedo,C.R.; Cruz,M.A.L.; Venâncio,T.M.; Cavalcante,C.P.; Uchôa,A.F.; Astolfi Filho,S.; Oliveira,A.E.A.; Fernandes,K.V.S.; Xavier-Filho,J.
We report the detection of insulin-like antigens in a large range of species utilizing a modified ELISA plate assay and Western blotting. We tested the leaves or aerial parts of species of Rhodophyta (red alga), Bryophyta (mosses), Psilophyta (whisk ferns), Lycopodophyta (club mosses), Sphenopsida (horsetails), gymnosperms, and angiosperms, including monocots and dicots. We also studied species of fungi and a cyanobacterium, Spirulina maxima. The wide distribution of insulin-like antigens, which in some cases present the same electrophoretic mobility as bovine insulin, together with results recently published by us on the amino acid sequence of an insulin isolated from the seed coat of jack bean (Canavalia ensiformis) and from the developing fruits of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insulin; Insulin-like; Antigens; Evolution; Plants; Cyanobacteria; Algae; Fungi.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000300004

Evolution and conservation of immunological activity
Provedor de dados: 56
Autores: Vaz,N.M.
Paraphrasing what Gregory Bateson says on evolution, we might say that: "Immunology has long been badly taught. In particular, students - and even professional immunologists - acquire theories of immunological activity without any deep understanding of what problems these theories attempt to solve."
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Theory; Immune system; Evolution; Conservation; Bateson; Maturana.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006001200002

Recent updated aspects of colicins of Enterobacteriaceae
Provedor de dados: 58
Autores: Cursino,Luciana; Šmarda,Jan; Chartone-Souza,Edmar; Nascimento,Andréa M.A.
The colicins are protein compounds produced by, and active against, Escherichia coli and others members of Enterobacteriaceae family. At least 34 different colicins have been described and found to share an interesting number of features. In the present review we focus on the major characteristics of colicins of gram-negative bacteria and explore their production and practical applications.The colicins are protein compounds produced by, and active against, Escherichia coli and others members of Enterobacteriaceae family. At least 34 different colicins have been described and found to share an interesting number of features. In the present review we focus on the major characteristics of colicins of gram-negative bacteria and explore their production and...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Colicins; Escherichia coli; Genetics; Evolution; Ecology.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000300001

Plant insulin or glucokinin: a conflicting issue
Provedor de dados: 61
Autores: Xavier-Filho,José; Oliveira,Antônia Elenir A.; Silva,Luciana Belarmindo da; Azevedo,Cassiana Rocha; Venâncio,Thiago Motta; Machado,Olga Lima T.; Oliva,Maria Luiza; Fernandes,Kátia Valevski S.; Xavier-Neto,José.
The presence of insulin in plants is not accepted by the scientific community in general. In this review we discuss this paradigm and retrieve information that strongly suggests that insulin is indeed found in plants. We present results, which indicate that a protein molecule with the same amino acid sequence as bovine insulin is expressed in leguminous plants. Additionally, we provide evidence that proteins associated with insulin signalling pathways in vertebrates are also found in association with insulin-like molecules in plants.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insulin; Glucokinin; Peptide hormone; Plants; Amino acid sequence; Evolution.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200002

Occurrence of polygyny in Acromyrmex subterraneus molestans Santschi 1925 (Hymenoptera: Formicidae)
Provedor de dados: 65
Autores: Souza,Danival José de; Lino Neto,José; Lucia,Terezinha M. C. Della; Peternelli,Ethel.
Polygyny denotes the coexistence of two or more mated and fertile queens in the colony. A colony of Acromyrmex subterraneus molestans Santschi containing 14 queens was collected on campus of the Universidade Federal de Viçosa, Brazil, aiming to verify if they were all egg-layers and fertile . The volume of the fungus garden in the nest was about 500 ml with a large number of larvae and pupae. Observation of the ovarian development and spermathecae indicates that 13 queens had copulated and ovary did not show morphological differences among them. This could indicate that polygyny is not accidental and may represent an adaptative strategy to optimize the development of the initial colony in A. subterraneus molestans.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf-cutting ants; Adaptative strategy; Evolution.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000500045