14 documents found, page 1 of 2
Ultrastructural characterization of the spermatozoa of Aethalion reticulatum Li...
Araújo, Vinícius Albano; Moreira, Jane; Neves, Clóvis Andrade; Lino-Neto, José; Báo, Sônia NairThe Hemiptera order is currently divided into four suborders. Among them the Auchenorrhyncha suborder is considered to be paraphyletic. Morphology of insect spermatozoa has provided promising characteristics that can be used for phylogenetic inference. In this study, Aethalion reticulatum (Aethalionidae) spermatozoa were examined by light and electron microscopy. The head of the spermatozoa is composed of an ac...
Structural and ultrastructural characteristics of male reproductive tract and s...
Moreira, Jane; Araújo, Vinícius Albano; Lino-Neto, José; Báo, Sônia NairThis study represents the first characterization of male reproductive tracts and ultrastructural description of sperm of Cryptinae species. In Lymeon dieloceri and Pachysomoides sp., the male reproductive tract is formed by a pair of testis, two deferent ducts, two accessory glands and one ejaculatory duct. The spermatozoa are similar to those described for other Hymenoptera, with: (1) the acrosome formed by th...
Ultrastructure of spermatozoa in two solitary bee species with an emphasis on s...
Araújo, Vinícius Albano; Serrão, José Eduardo; Moreira, Jane; Báo, Sônia Nair; Lino-Neto, JoséMorphology of spermatozoa in bees has provided promising results for phylogenetic analyses. In this work, the structure and ultrastructure of spermatozoa from Thygater (Thygater) analis and Melitoma segmentaria were characterized and the synapomorphies shared in the family Apidae are discussed. In these species, spermatozoa bundles which are undone in the seminal vesicle possess, on average, 50 cells. Spermatoz...
Acaricidal properties of vetiver essential oil from Chrysopogon zizanioides (Po...
Campos, Roseane Nunes de Santana; Lima, Cecília Beatriz Nascimento; Oliveira, Alexandre Passos; Araújo, Ana Paula Albano; Blank, Arie FitzgeraldTicks are arthropods widely distributed in tropical and subtropical regions, which can transmit infectious agents also responsible for zoonoses. Excessive use of conventional acaricides has resulted in the onset of drug resistance by these parasites, thus the need to use alternative methods for their control. This study evaluated the acaricidal activities of Chrysopogon zizanioides (vetiver) essential oils cont...
Sperm storage in Hemidactylus mabouia: morphological and ultrastructural aspect...
Sartori, Sirlene Souza Rodrigues; Nogueira, Katiane de Oliveira Pinto Coelho; Araújo, Vinícius Albano; Neves, Clóvis Andrade; Kolisnyk, BenjaminSperm storage is a common phenomenon in most female reptiles. Evidence of sperm storage is based on the observation that female fertilization occurs even when females are separated from males, as well as the presence of agglomerates of spermatozoa in specific regions of the oviducts. Lizards are capable of storing sperm in the uterine tube, vagina, or in both regions. However, representatives of the Gekkonidae ...
Ultrastructure and heteromorphism of spermatozoa in five species of bugs (Penta...
Araújo, Vinícius Albano; Lino-Neto, José; Ramalho, Francisco de Sousa; Zanuncio, José Cola; Serrão, José EduardoPentatomidae is one of the largest Heteroptera families, comprising about 10% of the species estimated for the suborder. In spite of existing studies, doubts remain regarding the systematics of Pentatomomorpha. In this study, five species of Pentatomidae spermatozoa were examined to achieve characteristics that enable inferences in the phylogeny of the group and in behavioral issues associated with the presence...
Phagocytosis of spermatozoa by epithelial cells in the vagina of the lizard Hem...
Nogueira, Katiane de Oliveira Pinto Coelho; Araújo, Vinícius Albano; Sartori, Sirlene Souza Rodrigues; Neves, Clóvis AndradeHemidactylus mabouia is an Africa oviparous lizard that is now distributed on other continents and has been introduced to Brazil. In the majority of reptiles, the females have the ability to store spermatozoa in specialized regions of the genital tract. Considering that in H. mabouia the storage of spermatozoa is restricted to the region of the uterine tube, in this study we utilized optical and transmission el...
Morfofisiologia dos ductos deferentes durante a maturação sexual e aspectos da ...
Araújo, Vinícius AlbanoConselho Nacional de Desenvolvimento Científico e Tecnológico; Poucos estudos enfatizam os sistemas reprodutores em insetos. Isto resulta em uma carência de informações que possibilitariam estabelecer padrões e relações entre os grupos. Os caracteres morfológicos do sistema reprodutor interno em machos se mostram promissores para estudos taxonômicos e filogenéticos. Além disso, apesar dos Meliponini serem basta...
Impact of resource availability on bee diversity.
Araújo, Vinícius Albano; Araújo, Ana Paula Albano; Itabaiana, Yasmine AntoniniResource availability is an important predictor of abundance and species richness. In this paper we veri!ed why there is local variation in bee diversity testing the hypothesis that bee species richness and abundance will increase with increasing resource availability. Resource availability was considered here as the number of "owering plants and the number of plant species. Sampling was carried out at two site...
Relationship between invertebrate fauna and bromeliad size.
Araújo, Vinícius Albano; Melo, Syomara Ker de; Araújo, Ana Paula Albano; Gomes, M. L. M.; Carneiro, Marco Antonio AlvesMuitas espécies de bromélias são capazes de armazenar água e detritos, permitindo o estabelecimento de comunidades associadas aos seus tanques de água e às suas folhas. Neste trabalho, foram amostrados 70 indivíduos de Vriesea sp. (Carrière) (Bromeliaceae), em uma área de campo rupestre na Serra de Ouro Branco-MG, Brasil. Foi testada a relação entre a riqueza e a abundância das comunidades de invertebrados asso...