Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados 104 (3) 53 (1) 74 (1) 76 (1) 92 (1) Autor Machado,Vilmar (7) Araújo,Aldo Mellender de (3) Araujo,Aldo M. (1) Araújo,Aldo M. de (1) Berlitz,Diouneia Lisiane (1) Fiuza,Lidia Mariana (1) Fritz,Leila Lucia (1) Galián,José (1) Macedo,Vera Regina Mussoi (1) Mosmann,Cleri S. (1) Serrano,José (1) Valiati,Victor H. (1) Mais... Palavra-chave Coleoptera (6) Chauliognathus (4) Assortative mating (2) Cantharidae (2) Aggregation (1) Agroecossistemas (1) Aposematism (1) Bacillus cereus (1) Bacillus sphaericus (1) Bacillus thuringiensis (1) Bacilos entomopatogênicos (1) COI (1) Color polymorphism (1) Colour polymorphism (1) Competition (1) Emergence (1) Mimicry (1) Morphometry (1) Mullerian mimicry (1) Müllerian mimicry (1) Mais... Tipo do documento Info:eu-repo/semantics/article (7) Ano 2010 (1) 2006 (1) 2004 (1) 2003 (1) 2001 (2) 1999 (1) Mais... País Brazil (7) Idioma Inglês (6) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 7 Primeira ... 1 ... Última Frequência de Bacillus spp. em solos de diferentes sistemas de cultivo de arroz irrigado em Cachoeirinha, RS 53 Fritz,Leila Lucia; Berlitz,Diouneia Lisiane; Macedo,Vera Regina Mussoi; Machado,Vilmar; Fiuza,Lidia Mariana. Bacilos entomopatogênicos são bactérias observadas principalmente no solo, consideradas importantes agentes no controle biológico de doenças e pragas da agricultura. No entanto, existem poucos estudos que relatam a influência das práticas agrícolas nas populações de Bacillus spp. Essa pesquisa objetivou avaliar a freqüência de bactérias entomopatogênicas pertencentes ao gênero Bacillus obtidas de amostras de solo coletadas no ano agrícola de 2006/2007 de diferentes sistemas de cultivo de arroz irrigado da EEA-IRGA, Cachoeirinha (RS). Foram analisadas 36 amostras de solos, oriundas de três sistemas de plantio de arroz irrigado, pré-germinado (SPG), convencional (SPC), plantio direto (SPD) e de uma área sem plantio de arroz (C). Para tanto, um grama de solo... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroecossistemas; Bacilos entomopatogênicos; Sistemas de plantio; Bacillus thuringiensis; Bacillus sphaericus; Bacillus cereus. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000200020 Phylogenetic relationships and the evolution of mimicry in the Chauliognathus yellow-black species complex (Coleoptera: Cantharidae) inferred from mitochondrial COI sequences 74 Machado,Vilmar; Araujo,Aldo M.; Serrano,José; Galián,José. The phylogenetic relationships of twelve species of Chauliognathus were investigated by studying the mitochondrial cytochrome oxidase I gene. A 678 bp fragment of the COI gene was sequenced to test the hypothesis that the Müllerian mimicry species of the "yellow-black" complex make up a monophyletic clade, separated from species with other colour patterns. The data set was analysed by neighbour-joining, maximum parsimony and maximum likelihood procedures. The results support a single origin of the yellow-black colour pattern during the evolution of the genus, with one main clade formed by Chauliognathus lineatus, C. tetrapunctatus, C. riograndensis, C. flavipes, C. octomaculatus, C. fallax, and another one formed by two species, C. expansus and C sp 1,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cantharidae; Chauliognathus; COI; Coleoptera; Müllerian mimicry; Phylogeny; Yellow-black complex. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100010 The aggregation of Chauliognathus species (Coleoptera, Cantharidae) and its possible role for coexistence and mimicry 76 Machado,Vilmar; Araújo,Aldo Mellender de. The relative population sizes of a species complex of Chauliognathus are reported, as well as their spatial distribution associated with different patches of food plants. Field work was done at Fazenda Santa Isabel, municipality of Guaíba, State of Rio Grande do Sul, Brazil. The results suggest that two mechanisms account for the reduction in food competition among the species involved: one is asynchrony in the appearance of the species in the area, and the other is aggregation in different patches of food plants. Since the species here reported show a similar colour pattern (yellow-black) the possibility of the occurrence of serial mimicry in this complex of species is dicussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Chauliognathus; Aggregation; Competition; Mimicry; Coleoptera. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200002 Elytra colour polymorphism and randomness of matings in Chauliognathus fallax Germar 1824 from southern Brazil (Coleoptera, Cantharidae) 92 Machado,Vilmar; Araújo,Aldo Mellender de. Beetles of the species Chauliognathus fallax Germar 1824 are polymorphic for elytron colouration with six morphs distinguished on the basis of black pigmentation on a yellow background. We investigated samples of C. fallax taken in eight consecutive weeks aiming to determine the frequency of the morphs which were grouped, for statistical analysis, into three classes according to elytra pigmentation as well as the possible occurrence of assortative mating. Our results showed a variation in the frequency of the classes throughout the season, both in males and females, with the maximum frequency of each class at the fourth and fifth week. The three classes (A, B, C) showed the same pattern of variation, and class B was always the more frequent. To test... Tipo: Info:eu-repo/semantics/article Palavras-chave: Assortative mating; Chauliognathus; Coleoptera; Colour polymorphism. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000300008 Morphometric analysis, mimicry, and color polymorphism in five species of Chauliognathus Hentz (Coleoptera, Cantharidae) 104 Machado,Vilmar; Araújo,Aldo M. de; Mosmann,Cleri S.. This study presents data on morphometric variation for length and width of elytra in tive sympatric species of the genus Chauliognathus Hentz, 1830: C. flavipes Fabricius, 1781, C. octomaculatus Pie, 1915, C. expansus Waterhouse, 1878, C. fallax Germar, 1824 and C. lineatus Zwetsch &amp; Machado, 2000. The meaning of this variation is discussed in the light of the theory of mimicry and visual communication between prey and predator. Females are larger than males in all species, except C. expansus. The analysis of variance for length of elytron as well as for width showed that the differences between species are significant for males and females; significant interaction (sex x species) was also found. The similarity in color pattern of these species, as... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coleoptera; Cantharidae; Chauliognathus; Morphometry; Color polymorphism. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000300007 Analysis of the geographical variation of elytral color polymorphisms in three species of soldier beetles, Chauliognathus Hentz (Cantharidae) in southern Brazil 104 Machado,Vilmar; Valiati,Victor H.. In the present report, we investigate polymorphism in three of the Brazilian species of Chauliognathus Hentz, 1930 (Coleoptera, Cantharidae), by analyzing the geographical color pattern variation of the elytra in C. flavipes, C. fallax and C. octomaculatus. These species belong to the mullerian complex called the "yellow-black". They are usually found in clusters on their host plants at various locations and present similarities in the external body morphology and in the color pattern of the elytra and the pronotum. Chauliognathus flavipes is the most common species with eight phenotypic classes followed by of C. fallax and C. octomaculatus with six and two phenotypic classes respectively. The analyses indicate a statistically significant difference in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coleoptera; Mullerian mimicry; Aposematism. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400010 Color polymorphism in Chauliognathus flavipes Fabricius (Coleoptera, Cantharidae): II. Patterns of emergence of morphs and mating system 104 Machado,Vilmar; Araújo,Aldo Mellender de. This study presents data on the color polymorphism in Chauliognathus flavipes Fabricius 1781 (Coleoptera, Cantharidae), analysing the variations in the emergence pattern of phenotypic classes for elytra color and mating system. The frequency of the phenotypic classes varies significantly throughout the season (males:X² = 59,705; females: X² = 61,017; 10 gl; p<0.001) being similar in males and females. The frequency of classes does not differ significantly among the insects that were copulating and those that were not copulating at the time of collection, i.e., the matings are random for elytra color patterns. The variations observed in frequency of phenotypic classes are not influenced by factors associated with sex. Furthermore, the elytra color... Tipo: Info:eu-repo/semantics/article Palavras-chave: Polymorphism; Phenotypic class; Emergence; Assortative mating; Coleoptera. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200010 Registros recuperados: 7 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco