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Morphometric observations on three populations of Schizaphis graminum (Rondani), a main wheat aphid pest in Brazil Anais da SEB
Rubin-de-Celis,Verônica E.; Gassen,Dirceu N.; Callegari-Jacques,Sídia M.; Valente,Vera L. S.; Oliveira,Alice K..
The green aphid Schizaphis graminum (Rondani) is an important pest of Graminae. Samples of this aphid were collected at three environmentally distinct Brazilian localities, Passo Fundo (RS), Jaguariuna (SP) and Dourados (MS). Alatae and apterous viviparous forms were reared on the BR-35 wheat (Triticum aestivum) strain under controlled laboratory conditions and studied as to their variability in measures of body size and production of progeny. Univariate (ANOVA) and multivariate (canonical discriminant functions) techniques were used to evaluate differences among the three populations. Conspicuous differences between populations were observed in the length of five structures of the alatae and eight of the apterous forms, as well as in offspring production....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Homoptera; Morphometry.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000300002
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Assemblages of drosophilids (Diptera, Drosophilidae) in mangrove forests: community ecology and species diversity Iheringia, Sér. Zool.
Schmitz,Hermes J.; Hofmann,Paulo R. P.; Valente,Vera L. S..
Brazilian fauna of drosophilids has been researched in various ecosystems, but those in mangrove forests remain overlooked in Brazil and elsewhere. The present study attempts to characterise the assemblages of drosophilids of this environment, based on 28 collections taken in three mangrove areas in Santa Catarina Island, southern Brazil. The three mangroves surveyed were different in their surroundings, which varied from highly urbanised areas to conservation areas with natural vegetation. Overall, 69 species were collected, and no remarkable difference was detected in species composition and abundances or in the richness, evenness and heterogeneity between sites. The species abundance distribution observed fitted to a theoretical lognormal distribution...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Biodiversity; Diversity measures; Drosophila; Neotropical region; Source-sink hypothesis.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000200008
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Drosophila angustibucca Duda sensu Frota-Pessoa is an undescribed species (Diptera, Drosophilidae) Rev. Bras. entomol.
Vilela,Carlos R.; Valente,Vera L. S.; Basso-da-Silva,Luciano.
Drosophila nappae sp. nov. , belonging to the subgroup I of the Drosophila tripunctata species group of the subgenus Drosophila, is described from flies of one strain established from several females collected from July 1994 through April 1995 at Morro Santana, Porto Alegre, state of Rio Grande do Sul, Brazil. This species has been misidentified during the past fifty years as Drosophila angustibucca (sensu Frota-Pessoa, 1954; non Duda, 1925, described from Costa Rica). Illustrations of male and female terminalia are also provided.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Neotropical region; New species; Paraguay; Tripunctata group.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000200012
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Drosophilids (Diptera) from an Atlantic Forest Area in Santa Catarina, Southern Brazil Rev. Bras. entomol.
Döge,Jonas S.; Valente,Vera L. S.; Hofmann,Paulo R. P..
The present work aims at knowing the faunal composition of drosophilids in forest areas of southern Brazil. Besides, estimation of species richness for this fauna is briefly discussed. The sampling were carried out in three well-preserved areas of the Atlantic Rain Forest in the State of Santa Catarina. In this study, 136,931 specimens were captured and 96.6% of them were identified in the specific level. The observed species richness (153 species) is the largest that has been registered in faunal inventories conducted in Brazil. Sixty-three of the captured species did not fit to the available descriptions, and we believe that most of them are non-described species. The incidence-based estimators tended to give rise to the largest richness estimates while...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Rain Forest; Drosophila; Neotropic; Species richness estimation; Taxonomic survey.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000400013
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