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Biological and genetic aspects of crosses between species of the genus Meccus (...
Martínez-Ibarra,José Alejandro; Grant-Guillén,Yunuen; Ventura-Rodríguez,Luz Verónica; Osorio-Pelayo,Paola Denisse; Macías-Amezcua,Michael DassaejvThe degree of reproductive isolation between Meccus phyllosomus and the remaining five species of the genus Meccus, as well as between Meccus bassolsae and Meccus pallidipennis, Meccus longipennis and Meccus picturatus, was examined. Fertility and the segregation of morphological characteristics were examined in two generations of hybrids from crosses between these species. The percentage of couples with offspr...
Biological and genetic aspects of experimental hybrids from species of the Phyl...
Martínez-Ibarra,José Alejandro; Ventura-Rodríguez,Luz Verónica; Meillon-Isais,Karla; Barajas-Martínez,Héctor; Alejandre-Aguilar,RicardoThe present work is a thorough investigation of the degree of reproductive isolation between Meccus mazzottii and Meccus longipennis, Meccus picturatus, Meccus pallidipennis and Meccus bassolsae, as well as between M. longipennis and M. picturatus. We examined fertility and segregation of morphological characteristics in two generations of hybrids derived from crosses between these species. The percentage of pa...
Kinetic and stoichiometric parameters estimation in a nitrifying bubble column ...
Ordaz, Alberto; Oliveira, Catarina S.; Aguilar, Ricardo; Carrión, Manuel; Ferreira, E. C.; Alves, M. M.; Thalasso, FrédéricThis article proposes a simple "in-situ" pulse respirometric method for the estimation of four important kinetic and stoichiometric parameters. The method is validated in a suspended biomass nitrifying reactor for the determination of (i) maximum oxygen uptake rate (OURexmax), (ii) oxidation yield (fE), (iii) biomass growth yield (fS), and (iv) affinity constant (KS). OURexmax and fE were directly obtained from...
Biology of three species of North American Triatominae (Hemiptera: Reduviidae: ...
Martínez-Ibarra,José Alejandro; Alejandre-Aguilar,Ricardo; Paredes-González,Edgar; Martínez-Silva,Miguel Alejandro; Solorio-Cibrián,MiriamAspects related to hatching, lifetime, number of blood meals for molting, mortality, feeding time, and postfeeding defecation delay were evaluated and compared in each instar of three North American Triatominae: Triatoma gerstaeckeri, Triatoma lecticularia and Triatoma protracta, all of them fed on rabbits. No significant differences (p > 0.05) were found among the three species regarding mean hatching rate, wh...
Biology of three species of the Meccus phyllosomus complex (Hemiptera: Reduviid...
Martínez-Ibarra,José Alejandro; Alejandre-Aguilar,Ricardo; Torres-Morales,Alfredo; Trujillo-García,Josefina Cecilia; Nogueda-Torres,BenjamínAspects related to hatching, life time, number of blood meals to molt, mortality, feeding time and postfeed defecation delay for each instar of Meccus phyllosomus, M. mazzottii, and M. bassolsae, life-cycle were evaluated and compared in two cohorts of each of those three species, fed on hens or rabbits. No significant (p > 0.05) differences were recorded among cohorts fed on hens respect to cohorts fed on rabb...
Development of genital plates in nymphs of Triatoma pallidipennis, Stål 1872, (...
Rodríguez-Sánchez,Milton; Alejandre-Aguilar,Ricardo; Nogueda-Torres,Benjamín; Camacho,Alejandro D; Martín-Frías,EliézerSearching for morphometric differences between sexes in immature forms, the development of genital plates in the exuviae of Triatoma pallidipennis Stål 1872nymphs was studied. Differences were found in the form and size of the 9th genital urosternite, it is larger and wider in males as compared to females. This difference is reported in several South American Triatoma species. From our results it is possible to...
Activity and Residual Effect of Two Formulations of Lambdacyhalothrin Sprayed o...
Mazariego-Arana<A NAME="mais2"></A>,Miguel Angel; Ramírez-San Juan,Eduardo; Alejandre-Aguilar,Ricardo; Nogueda-Torres,BenjamínThe insecticidal activity and residual effect of two formulations of lambdacyhalothrin were evaluated with Rhodnius prolixus;laboratory and field tests were conducted in the State of Chiapas, Mexico. The results indicate that the lethal concentrations of the active ingredient of SC (LC50 = 2.37 and LC90 = 8.5 mg, a.i./m²) were 4-8 times than those with the insecticide WP applied on R. prolixus bugs in palm leav...
Seroprevalence of human Trypanosoma cruzi infection in diferent geografic zones...
Mazariego-Arana,Miguel Angel; Monteón,Victor M.; Ballinas-Verdugo,Martha Alicia; Hernández-Becerril,Nidia; Alejandre-Aguilar,Ricardo; Reyes,Pedro A.A serologic survey was carried out in four different geographic zones of Chiapas, Mexico. A total of 1,333 samples were collected from residents of thirteen communities located on the Coast, Central Mountain, Lacandon Forest and a zone called Mesochiapas. One hundred and fifty one seropositive individuals (11.3%) were identified. Human Trypanosoma cruzi infection was influenced by geography. In the Lacandon For...
Role of two Triatoma (Hemiptera: Reduviidae: Triatominae) species in the transm...
Martínez-Ibarra,José Alejandro; Bárcenas-Ortega,Nina Malena; Nogueda-Torres,Benjamín; Alejandre-Aguilar,Ricardo; Lino Rodríguez,MiltonFrom August 1997 to August 1998, 334 specimens of Triatoma longipennis and 62 of T. picturata were collected in four groups of localities placed in the zone from Guadalajara, Jalisco to Tepic, Nayarit, in the West Coast of Mexico. Most T. longipennis were collected outdoors (69.2%) while most T. picturata (58.1%) were collected indoors. All collected specimens were examined for Trypanosoma cruzi infection, whic...
Triatoma bassolsae sp. n. from Mexico with a key to species of "phyllosoma" com...
Aguilar,Ricardo Alejandre; Nogueda Torres,Benjamín; Cortéz Jímenez,Máximo; Jurberg,José; Galvão,Cleber; Carcavallo,RodolfoAccording to the descriptions of five closely related species of the genus Triatoma Laporte, 1832: T. phyllosoma (Burmeister, 1835), T. pallidipennis (Stal, 1872), T. picturata Usinger, 1939, T. longipennis Usinger, 1939 and T. mazzottii Usinger, 1941 and further published studies, these species could be included in a "specific complex" named as the species formerly described. All these species are typical from...
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