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Search Results: 1 - 10 of 332427 matches for " Vanessa S;Joachim-Bravo "
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Importancia da ingest?o de proteína na fase adulta para o sucesso de acasalamento dos machos de Ceratitis capitata Wiedemann (Diptera: Tephritidae)
Silva Neto, Alberto M da;Dias, Vanessa S;Joachim-Bravo, Iara S;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000200014
Abstract: the importance of the protein ingestion during the adult stage on the mating success of males of ceratitis capitata wiedemann was evaluated in experiments of laboratory and field cage. in laboratory, the effects of protein ingestion during the first four or 12 days of the male adult life was assessed by the following parameters: mating success (capacity of being chosen by the female) and the number of males that give out pheromonal signals. some experiments of mating success had been carried through with males in different ratios. in these tests, the number of males which had ingested protein (an unique male) was remained constant and the number of males fed without protein was gradually increased from 1:1 to 1:5. in the field cages, the mating success experiments were done using a 1:1 ratio. the results showed that the protein ingestion in the first four days of life did not influence any of the analyzed parameters. when the period of ingestion of protein was extended to 12 days, protein-fed males fed produced more pheromonal signals and had a higher mating success when at a 1:1 ratio in laboratory and field cage assays. in laboratory, females randomly chose males in any other tested ratio (1:2, 1:3, 1:4 and 1:5), indicating that the female may lose the perception to identify the male who ingested protein in the first 12 days.
Escolha de parceiro para acasalamento em Ceratitis capitata (Wiedemann) (Diptera: Tephritidae): influência do envelhecimento dos machos no sucesso de cópula
Silva Neto, Alberto M da;Dias, Vanessa S;Joachim-Bravo, Iara S;
Neotropical Entomology , 2009, DOI: 10.1590/S1519-566X2009000500002
Abstract: the objective of this study was to evaluate the effect of male ageing on male pheromone release and mating success of ceratitis capitata (wiedemann). the effects of male ageing on mating were evaluated on five and 21 d-old males by assessing their mating success (males chosen by a female for copulation) and the amount of males releasing the sex pheromone. the mating success was evaluated by using several ratios of young to older males by increasing the number of older males:young males from 1:1 to 5:1. the mating success of the 1:1 ratio was also evaluated in field cages. the evaluation of the mating success (in the 1:1 ratio) showed a clear preference of the females for young males. sex pheromone emission was much more common on young than older males. even in cases were older males were more abundant (ratios 2:1 and 3:1), females still chose the young males. however, females could not distinguish young from older males in ratios of 4:1 or 5:1. our data indicate that the ageing of c. capitata males has a considerable negative effect on their reproductive success, especially if they are found in a proportion any lower than 3:1.
Oviposition preference and larval performance in Ceratitis capitata (Díptera, Tephritidae)
Joachim-Bravo, Iara Sordi;Zucoloto, Fernando Sérgio;
Revista Brasileira de Zoologia , 1997, DOI: 10.1590/S0101-81751997000400004
Abstract: experiments concerning oviposition preference were carried out on ceratitis capitata to determine whether females are able to preferentially oviposit on natural hosts in which the larvae develop better. the results indicated that the females do not preferentially oviposit on hosts of better nutritive value for the larvae.
Biological and behavioral aspects of two laboratory strains of Ceratitis capitata (Diptera: Tephritidae): The influence of periodic introduction of wild flies in the colony
JOACHIM-BRAVO, Iara Sordi;MOREIRA DA SILVA NETO, Alberto;SIM?ES DIAS, Vanessa;
Acta zoológica mexicana , 2009,
Abstract: the healthy maintenance of insects reared under laboratory conditions requires strategies to retain the natural characteristics of their life-histories traits. rearing strategies include artificial selection to laboratory conditions, hybridization with compatible strains, and supplying the colony with wild individuals. we compared behavioral as well as life-history aspects of two laboratory strains of ceratitis capitata wiedemann (diptera, tephritidae) that had either been reared for 15-20 years under laboratory conditions with or without introducing wild specimens (lab-pop and hybrid-pop, respectively). the parameters evaluated were: performance and food ingestion of immatures, adult size and longevity, female oviposition preference and fecundity, egg viability, and mating choice. analyses of these parameters were conducted under laboratory rearing conditions. the largest differences observed between the two strains were related to behavioral components: food ingestion rate at the larval stage and oviposition behavior. in general, lab-pop individuals were less selective and more adapted to the artificial diet than hybrid-pop individuals (diet consumption), but there were no significant differences between the two strains in terms of percentage of emergence, egg viability, adult size, fecundity, and mating choice. it is suggested that the use of hybrid strains is more appropriate than the use of strains without the incorporation of wild individuals, especially in studies that involve behavioral parameters, as hybrid strains behave very similarly to wild populations, according our previous studies.
Biological and behavioral aspects of two laboratory strains of Ceratitis capitata (Diptera: Tephritidae): The influence of periodic introduction of wild flies in the colony
Iara Sordi JOACHIM-BRAVO,Alberto MOREIRA DA SILVA NETO,Vanessa SIM?ES DIAS
Acta zoológica mexicana , 2009,
Abstract: El mantenimiento saludable de insectos criados en condiciones de laboratorio requiere estrategias que conserven características naturales de sus historias de vida. Las estrategias en cría de insectos incluyen selección, hibridación con linajes compatibles y suministro a la colonia con individuos silvestres. Para investigar este último punto, comparamos los aspectos comportamentales así como los aspectos de las historias de vida de dos colonias de laboratorio de Ceratitis capitata Wiedemann (Diptera, Tephritidae) que han sido criadas entre 15 y 20 a os en condiciones de laboratorio sin introducir ejemplares silvestres (Lab-Pop), o con introducciones ocasionales (Hybrid-Pop). Los parámetros evaluados fueron: el desempe o y la tasa de ingesta larval, el tama o y la longevidad de los adultos, la preferencia de oviposición y fecundidad de la hembra, la viabilidad del huevo, y la elección para el apareamiento. Se realizaron análisis de estos parámetros bajo condiciones de cría con una dieta artificial. Las mayores diferencias entre individuos de las dos colonias se registraron en variables comportamentales: tasa de ingesta larval y comportamiento de oviposición. En general, la colonia Lab-Pop fue menos selectiva y más adaptada a la dieta artificial que la colonia Hybrid-Pop (consumo de la dieta), pero no hubo ninguna diferencia significativa entre las dos poblaciones en el porcentaje de emergencia, la viabilidad del huevo, el tama o de los adultos, la fecundidad, y éxito en el apareamiento. Se sugiere que el uso de colonias híbridas es más apropiado al uso de colonias a las que no se les incorporan ejemplares silvestres, sobre todo en estudios que involucran parámetros comportamentales, dado que las colonias híbridas se comportan como las poblaciones silvestres, de acuerdo con estudios anteriores.
Oviposition Behavior of Ceratitis capitata Wiedemann (Diptera: Tephritidae): Association Between Oviposition Preference and Larval Performance in Individual Females
JOACHIM-BRAVO, IARA S.;FERNANDES, ODAIR A.;BORTOLI, SéRGIO A. DE;ZUCOLOTO, FERNANDO S.;
Neotropical Entomology , 2001, DOI: 10.1590/S1519-566X2001000400008
Abstract: the oviposition preference and larval performance of females of ceratitis capitata (wiedemann) were examined. wild or laboratory-reared females were tested for oviposition preference in relation to papaya fruit in different stages of ripeness, as well as to two different fruits: papaya and apple. the results demonstrated that both laboratory-reared and wild females preferred ripe papaya fruit compared to unripe fruit for oviposition, and that ripe papaya was the best for larval performance. when oviposition preference was tested with different fruits (papaya and apple), both wild and laboratory-reared larvae developed better in papaya. however, only wild females showed a preference for oviposition on papaya as opposed to apple. laboratory-reared females showed no oviposition preference on fruits that resulted in better larval performance.
Oviposition preference hierarchy in Ceratitis capitata (Diptera, Tephritidae): influence of female age and experience
Joachim-Bravo, Iara S.;Fernandes, Odair A.;Bortoli, Sérgio A.;Zucoloto, Fernando S.;
Iheringia. Série Zoologia , 2001, DOI: 10.1590/S0073-47212001000200014
Abstract: the influence of two factors, age and previous experience, on the oviposition hierarchy preference of ceratitis capitata (wiedemann, 1824) females was studied. two populations were analyzed: one reared in laboratory during 17 years and the other captured in nature. in the first experiment the oviposition preference for four fruits, papaya, orange, banana and apple was tested at the beginning of oviposition period and 20 days past. the results showed that the wild females as much the laboratory ones had an oviposition preference hierarchy at the beginning of peak period of oviposition. however this hierarchic preference disappeared in a later phase of life. in the second experiment the females were previously exposed to fruits of different hierarchic positions and afterwards their choice was tested in respect to the oviposition preference for those fruits. the results showed that there was an influence of the previous experience on the posterior choice of fruits to oviposition when the females were exposed to fruits of lower hierarchic position.
Oviposition preference hierarchy in Ceratitis capitata (Diptera, Tephritidae): influence of female age and experience
Joachim-Bravo Iara S.,Fernandes Odair A.,Bortoli Sérgio A.,Zucoloto Fernando S.
Iheringia. Série Zoologia , 2001,
Abstract: The influence of two factors, age and previous experience, on the oviposition hierarchy preference of Ceratitis capitata (Wiedemann, 1824) females was studied. Two populations were analyzed: one reared in laboratory during 17 years and the other captured in nature. In the first experiment the oviposition preference for four fruits, papaya, orange, banana and apple was tested at the beginning of oviposition period and 20 days past. The results showed that the wild females as much the laboratory ones had an oviposition preference hierarchy at the beginning of peak period of oviposition. However this hierarchic preference disappeared in a later phase of life. In the second experiment the females were previously exposed to fruits of different hierarchic positions and afterwards their choice was tested in respect to the oviposition preference for those fruits. The results showed that there was an influence of the previous experience on the posterior choice of fruits to oviposition when the females were exposed to fruits of lower hierarchic position.
Influence of protein on feeding behavior of Ceratitis capitata Wiedemann (Diptera: Tephritidae): comparison between immature males and females
Plácido-Silva, Maria do C.;Zucoloto, Fernando S.;Joachim-Bravo, Iara S.;
Neotropical Entomology , 2005, DOI: 10.1590/S1519-566X2005000400002
Abstract: the objective of this work was to compare the influence of dietary protein on performance and feeding behavior of immature males and females of ceratitis capitata (wiedemann). the protein source was beer yeast at 6.5 and 1.5 g.100 ml-1. the following parameters were evaluated: percentage of emergence, total life cycle, adult size, diet consumption, feeding preference and discrimination threshold for yeast. immature adults showed similar protein requirements regardless of sex. both males and females showed similar feeding behavior, preferring to feed on the diet with higher protein content. the discrimination threshold for levedure in both sexes was 0.4 g.100 ml-1. we concluded that immature males of c. capitata show similar protein requirements as the immature females.
Performance de Ceratitis capitata Wiedemann (Diptera: Tephritidae) em frutos: compara??o de duas popula??es criadas em laboratório
Joachim-Bravo, Iara S;Guimar?es, Analice N;Magalh?es, Tatiana C;Nascimento, Ant?nio S;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000100002
Abstract: this study evaluated the influence of two fruits hosts (orange and papaya) on biological and behavioral parameters of two populations of ceratitis capitata (wiedemann) reared under laboratory conditions. one of these populations has been reared under laboratory conditions by 25 years without introduction of wild flies (lab-pop), while the other has been maintained under the same conditions by 15 years but with occasional introduction of wild specimens (hybrid-pop). the following parameters were analyzed: emergence percentage, life cycle duration (from eclosion to emergence), adult size, longevity, female fecundity and oviposition preference. the best performance of immatures of both populations was obtained on papaya as a host. larvae reared on orange had longer life cycle, low emergence percentage and smaller adults. the fruit type did not affect fecundity and longevity of the lab-pop, but in the hybrid-pop males lived longer when reared on papaya, while females had higher longevity and fecundity when reared on orange. females of both populations preferred to lay eggs in papaya (better host for larvae) when compared to orange. however, some eggs were deposited on orange only by females of lab-pop, suggesting a lower ability for host selection of this population. these data are discussed regarding to the effects of continuous laboratory rearing on the biological parameters of this species.
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