Consulta: creatorFacets:"Valiati,Victor H."
Registros recuperados: 3
Data/hora: 02/06/2024 07:03:47

Association of a locus on rat chromosome 4 with anxiety-related behaviors in two selectively bred rat lines
Provedor de dados: 74
Autores: Hameister,Thaïs M.; Izídio,Geison S.; Valiati,Victor H.; Ramos,André.
The Floripa H and L rat lines, selected for high and low locomotion in the central aversive area of an open field, a widely used emotionality test, were proposed as a model for studying the genetic basis of anxiety. The present study aimed to verify if the QTL Ofil1, mapped to rat chromosome 4 and previously identified as being related to emotionality in another population of rats, contributes to the behavioral variability observed in the Floripa rat lines. To this purpose, rats of five generations of selective breeding were genotyped for two polymorphic markers, D4RAT59 and D4MGH27, flanking Ofil1. Changes in genotype and allele frequencies throughout generations were evaluated in both H and L lines, in order to assess if the bidirectional selection based...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: QTL; Emotionality; Rat lines; Behavior genetics; Open field.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500008

Population dynamics of the invasive species Zaprionus indianus (Gupta) (Diptera: Drosophilidae) in communities of drosophilids of Porto Alegre City, Southern of Brazil
Provedor de dados: 82
Autores: Silva,Norma M. da; Fantinel,Carina da C.; Valente,Vera L.S.; Valiati,Victor H.
Population studies of invasive species allow us to understand how invaders react to new biotic and abiotic conditions, and how native species react to invasion. We evaluated the colonisation efficiency of the invader Zaprionus indianus (Gupta), in the urban area of Porto Alegre city, southern of Brazil. Samples of flies were taken from three urban parks, and ecological indexes were used based on the frequency of the sampled species. The indexes were calculated for breeding and feeding sites separately. The highest frequencies of Z. indianus compared to the other drosophilids were registered during seasons of highest mean temperatures, both for the feeding and the breeding sites. The highest values for the dominance index (D) and the lowest values for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological invasion; Ecological index; Urban park.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000300002

Analysis of the geographical variation of elytral color polymorphisms in three species of soldier beetles, Chauliognathus Hentz (Cantharidae) in southern Brazil
Provedor de dados: 104
Autores: 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