Términos relacionados

66 resultados encontrados para: AUTOR: Valle Mora, A.
  • «
  • 1 de 7
  • »
1.
Artículo
Biological attributes of diapausing and non-diapausing Doryctobracon areolatus (Hymenoptera, Braconidae), a parasitoid of Anastrepha spp. (Diptera, Tephritidae) fruit flies
Cruz Bustos, Jassmin (autora) ; Montoya, Pablo (autor) ; Pérez Lachaud, Gabriela (autora) ; Valle Mora, Javier Francisco (autor) ; Liedo Fernández, Pablo (autor) ;
Disponible en línea
Contenido en: Journal of Hymenoptera Research Número 78 (August 2020), páginas 41-56 ISSN: 1070-9428
PDF
Resumen en: Inglés |
Resumen en inglés

Doryctobracon areolatus (Szépligeti), a solitary endoparasitoid native to the Neotropics, attacks eggs and early instar larvae of Anastrepha fruit flies, and can enter diapause under tropical and subtropical conditions. We aimed to test if biological attributes, such as size, flight ability, starvation resistance, longevity and fecundity of diapausing individuals differ from those of non-diapausing ones. Parasitoids were obtained from a laboratory colony reared on Anastrepha ludens (Loew) larvae. Parasitized host puparia were sorted in two cohorts according to their diapause condition. Developmental time from egg to adult ranged from 18 to 31 days in non-diapausing parasitoids, and 70 to 278 days for diapausing individuals. Pupal weight and adult measurements were higher in non-diapausing than in diapausing parasitoids. There were no differences in adult longevity, starvation resistance, and emergence between diapausing and non-diapausing wasps. Flight ability and fecundity rates were greater in the non-diapausing than in the diapause cohort. The proportion of female offspring was greater in the non-diapausing cohort (42.5%), whereas in the diapausing cohort the male offspring proportion was greater (62.4%). Both cohorts produced diapause offspring, but the non-diapausing cohort produced more (26.6%) than the diapausing one (9.1%). Maternal age had a significant effect on the proportion of diapause offspring: in 26 to 34 days old non-diapausing females, 78.9% of their offspring entered into diapause. These results confirmed that diapause affects the biological attributes of D. areolatus. The observed differences contribute to better understand the diapause influence on the colonization and rearing process of this species and its use as biocontrol agent.


2.
Artículo
*Solicítelo con su bibliotecario/a
Precipitous decline of white-lipped peccary populations in Mesoamerica
Thornton, Daniel (autor) ; Reyna Hurtado, Rafael Ángel (autor) ; Perera Romero, Lucy (autora) ; Radachowsky, Jeremy (autor) ; Hidalgo Mihart, Mircea Gabriel (autor) ; García Anleu, Rony (autor) ; McNab, Roan (autor) ; Mcloughlin, Lee (autor) ; Foster, Rebecca (autora) ; Harmsen, Bart (autor) ; Moreira Ramírez, José Fernando (autor) ; Diaz Santos, Fabricio (autor) ; Jordan, Christopher A. (autor) ; Salom Pérez, Roberto (autor) ; Meyer, Ninon France Victoire (autor) ; Castañeda, Franklin (autor) ; Elvir Valle, Fausto Antonio (autor) ; Ponce Santizo, Gabriela (autora) ; Amit, Ronit (autora) ; Arroyo Arce, Stephanny (autora) ; Thomson, Ian (autor) ; Moreno, Ricardo (autor) ; Schank, Cody J. (autor) ; Arroyo Gerala, Paulina (autora) ; Bárcenas, Horacio V. (autor) ; Brenes Mora, Esteban (autor) ; Calderón, Ana Patricia (autora) ; Cove, Michael V. (autor) ; Gómez Hoyos, Diego (autor) ; González Maya, José F. (autor) ; Guy, Danny (autor) ; Hernández Jiménez, Gerobuam (autor) ; Hofman, Maarten (autor) ; Kays, Roland (autor) ; King, Travis (autor) ; Martinez Menjivar, Marcio Arnoldo (autor) ; Maza, Javier de la (autor) ; León Pérez, Rodrigo (autor) ; Ramos, Víctor Hugo (autor) ; Rivero Hernández, Crysia Marina (autora) ; Romo Asunción, Sergio (autor) ; Juárez López, Rugieri (autor) ; Jesús de la Cruz, Alejandro (autor) ; De la Torre, Jesús Antonio (autor) ; Towns, Valeria (autora) ; Schipper, Jan (autor) ; Portillo Reyes, Hector Orlando (autor) ; Artavia, Adolfo (autor) ; Hernández Pérez, Edwin Luis Oswaldo (autor) ; Martínez, Wilber (autor) ; Urquhart, Gerald R. (autor) ; Quigley, Howard (autor) ; Pardo, Lain E. (autor) ; Sáenz, Joel C. (autor) ; Sanchez, Khiavett (autora) ; Polisar, John (autor) ;
Contenido en: Biological Conservation Vol. 242, no. 108410 (2020), p. 1-12 ISSN: 0006-3207
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Large mammalian herbivores are experiencing population reductions and range declines. However, we lack regional knowledge of population status for many herbivores, particularly in developing countries. Addressing this knowledge gap is key to implementing tailored conservation strategies forspecies whose population declines are highly variable across their range. White-lipped peccaries (Tayassupecari) are important ecosystem engineers in Neotropical forests and are highly sensitive to human disturbance. Despite maintaining a wide distributional range, white-lipped peccaries are experiencing substantial population declines in some portions of their range.We examined the regional distribution and population status of the species in Mesoamerica. We used a combination of techniques, including expert-based mapping and assessment of population status, and data-driven distribution modelling techniques to determine the status and range limits of white-lipped peccaries. Our analysis revealed declining and highly isolated populations of peccaries across Mesoamerica, with a range reduction of 87% from historic distribution and 63% from current IUCN range estimates for the region. White-lipped peccary distribution is affected by indices of human influence and forest cover, and more restricted than other sympatric large herbivores, with their largest populations confined to transboundary reserves. To conserve white-lipped peccaries in Mesoamerica, transboundary efforts will be needed that focus on both forest conservation and hunting management, increased cross-border coordination, and reconsideration of country and regional conservation priorities. Our methodology to detail regional white-lipped peccary status could be employed on other poorly-known large mammals.


3.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Does Beauveria bassiana (Hypocreales: Cordycipitaceae) affect the survival and fecundity of the parasitoid Coptera haywardi (Hymenoptera: Diapriidae)?
Martínez Barrera, Olga Yaneth (autora) ; Toledo, Jorge (autor) ; Liedo Fernández, Pablo (autor) ; Gómez Ruiz, Jaime (autor) ; Valle Mora, Javier Francisco (autor) ; Cancino Díaz, Jorge Luis (autor) ; Montoya Gerardo, Pablo Jesús (autor) ;
Contenido en: Environmental Entomology Vol. 48, no. 1 (February 2019), p. 156–162 ISSN: 0046-225X
Nota: Solicítelo con su bibliotecario/a
Resumen en español

Se estudió bajo condiciones de laboratorio el efecto del hongo entomopatógeno Beauveria bassiana (Balsamo) Vuillemin sobre el desarrollo de estados inmaduros, supervivencia y fecundidad de los adultos de Coptera haywardi (Oglobin). El hongo se aplicó como conidio seco sobre pupas de Anastrepha obliqua (Macquart) (Diptera: Tephritidae) parasitadas y en adultos de dos grupos de edad (1–4 d y 5–10 d). El hongo no ocasionó efectos negativos en el desarrollo de los estados inmaduros, dado que en la emergencia de adultos no hubo diferencias con el testigo. Ambos sexos y grupos de edades de los adultos fueron susceptibles al hongo. Los machos tuvieron una vida más corta que las hembras incluso en los individuos no tratados. La infección del hongo incrementó la mortalidad, pero no hubo efecto sobre la fecundidad durante los primeros 18 días de vida adulta, ya que la fecundidad neta fue de 26.7 y 26.3 parasitoides por hembra tratada y no tratada, respectivamente. Nuestros resultados sugieren que dada la baja susceptibilidad de la pupa parasitada y el no efecto sobre la fecundidad neta durante los primeros 18 días de vida adulta, es posible desarrollar estrategias de manejo usando estos dos enemigos naturales en el control biológico de A. obliqua.

Resumen en inglés

The effect of the entomopathogenic fungus Beauveria bassiana (Balsamo) Vuillemin on the development of immature stages, and survival and fecundity of Coptera haywardi (Oglobin) adults was studied under laboratory conditions. The fungus was applied as dry conidia on parasitized pupae of Anastrepha obliqua (Macquart) (Diptera: Tephritidae) and on parasitoid adults of two different age groups (1- to 4-d-old, and 5- to 10-d-old). The fungus caused no negative effects on the development of the immature stages, since there were no differences on the emergence of adults compared with the untreated control. Adults were susceptible to the fungus on both sexes and age groups. Males showed shorter lifespan than females, even in untreated individuals. Despite the increased adult mortality produced by the fungus there was no effect on fecundity during first 18 d of adult life, as the net fecundity was 26.7 and 26.3 parasitoids per female treated and untreated, respectively. Our results suggest that, given the low susceptibility of parasitized pupae and the no effect on fecundity during the first 18 d of adult life, it is possible to develop management strategies using these two natural enemies in the biological control against A. obliqua.


4.
Artículo - Nota científica con arbitraje
*Solicítelo con su bibliotecario/a
Effect of spinosad combined with Beauveria bassiana (Hypocreales: Clavicipitaceae) on Hypothenemus hampei (Coleoptera: Curculionidae) under laboratory conditions
Morales, Arcadio D. (autor) ; Castillo Vera, Alfredo (autor) ; Cisneros Hernández, Juan (autor) ; Valle Mora, Javier Francisco (autor) ; Gómez Ruiz, Jaime (autor) ;
Contenido en: Journal of Entomological Science Vol. 54, no. 1 (January 2019), p. 106-109 ISSN: 0749-8004
Nota: Solicítelo con su bibliotecario/a

5.
Artículo
*Solicítelo con su bibliotecario/a
Efficacy of selected insecticides against Frankliniella spp. (Thysanoptera: Thripidae) in mango orchards
Lucero, Fidel ; Infante, Francisco (coaut.) ; Pérez López, Elsa Jeanneth (coaut.) ; Valle Mora, Javier Francisco (coaut.) ; Esquinca Avilés, Héctor Armando (coaut.) ; Castillo Vera, Alfredo (coaut.) ; Ortíz, José A. (coaut.) ;
Contenido en: Journal of Entomological Science Vol. 54, no. 2 (April 2019), p. 94-97 ISSN: 1366-638X
Nota: Solicítelo con su bibliotecario/a

6.
- Artículo con arbitraje
Fine-tuned intruder discrimination favors ant parasitoidism
Pérez Lachaud, Gabriela (autora) ; Rocha, Franklin H. (autor) ; Valle Mora, Javier Francisco (autor) ; Hénaut, Yann (autor) ; Lachaud, Jean Paul (autor) ;
Disponible en línea
Contenido en: PLoS One Vol. 14, no. 1, art. no. e0210739 (January 2019), p. 1-21 ISSN: 0187-6376
PDF PDF
Resumen en: Inglés |
Resumen en inglés

diversity of arthropods (myrmecophiles) thrives within ant nests, many of them unmolested though some, such as the specialized Eucharitidae parasitoids, may cause direct damage to their hosts. Ants are known to discriminate between nestmates and non-nestmates, but whether they recognize the strength of a threat and their capacity to adjust their behavior accordingly have not been fully explored. We aimed to determine whether Ectatomma tuberculatum ants exhibited specific behavioral responses to potential or actual intruders posing different threats to the host colony and to contribute to an understanding of complex ant-eucharitid interactions. Behavioral responses differed significantly according to intruder type. Ants evicted intruders that represented a threat to the colony’s health (dead ants) or were not suitable as prey items (filter paper, eucharitid parasitoid wasps, non myrmecophilous adult weevils), but killed potential prey (weevil larvae, termites). The timing of detection was in accordance with the nature and size of the intruder: corpses (a potential source of contamination) were detected faster than any other intruder and transported to the refuse piles within 15 min. The structure and complexity of behavioral sequences differed among those intruders that were discarded. Workers not only recognized and discriminated between several distinct intruders but also adjusted their behavior to the type of intruder encountered.

Our results confirm the previously documented recognition capabilities of E. tuberculatum workers and reveal a very fine-tuned intruder discrimination response. Colony- level prophylactic and hygienic behavioral responses through effective removal of inedible intruders appears to be the most general and flexible form of defense in ants against a diverse array of intruders. However, this generalized response to both potentially lethal and harmless intruders might have driven the evolution of ant-eucharitid interactions, opening a window for parasitoid attack and allowing adult parasitoid wasps to quickly leave the natal nest unharmed.


7.
- Artículo con arbitraje
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

Purpureocillium lilacinum (Thom) Luangsa-ard, Houbraken, Hywel-Jones & Samson (Hypocreales: Ophiocordycipitaceae) es un hongo comúnmente utilizado en el control de nematodos y ha sido reportado como patógeno de insectos. Sin embargo, son poco conocidos los efectos que causa sobre los insectos. Aquí se evaluó la patogenicidad de nueve aislamientos y la virulencia y efectos subletales de dos aislamientos en adultos de Anastrepha ludens (Loew) (Diptera: Tephritidae). Los ensayos demostraron que los nueve aislamientos fueron patogénicos, y causaron porcentajes de mortalidad que oscilaron entre 28.8 y 52.4% y un TL50 de 18 d o más. La cepa CFFSUR-A53 fue más virulenta que la cepa CFFSUR-A60, con valores de CL50 de 7.62 × 106 y 5.2 × 109 conidios por mL, respectivamente. Ambos aislamientos redujeron en 65 y 37% la esperanza de vida de las moscas, disminuyeron en 78 y 36% la fecundidad de las hembras, y en 31.4 y 18.5% la eclosión de los huevos, respectivamente.

Resumen en inglés

Purpureocillium lilacinum (Thom) Luangsa-ard, Houbraken, Hywel-Jones & Samson (Hypocreales: Ophiocordycipitaceae) is a fungus commonly used for controlling nematodes, and also has been reported as an insect pathogen. However, little is known about its effects on insects. Here, the pathogenicity of 9 isolates and the virulence and sublethal effects of 2 isolates were evaluated to control adult Anastrepha ludens (Loew) (Diptera: Tephritidae). The pathogenicity assays demonstrated that the 9 isolates were pathogenic, with mortality percentages ranging from 28.8 to 52.4% and LT50 values were 18 d or more. The strain CFFSUR-A53 was more virulent than CFFSUR-A60, with LC50 values of 7.62 × 106 and 5.2 × 109 conidia per mL, respectively. The isolates reduced the life expectancy of the flies by 65 and 37%, decreased fecundity by 78 and 36%, and reduced egg hatching by 31.4 and 18.5%, respectively.


8.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Polycultures, pastures and monocultures: effects of land use intensity on wild bee diversity in tropical landscapes of southeastern Mexico
Vides Borrell, Eric (autor) ; Porter Bolland, Luciana (autora) ; Ferguson, Bruce G. (autor) (1967-) ; Gasselin, Pierre (autor) ; Vaca Genuit, Raúl Abel (autor) ; Valle Mora, Javier Francisco (autor) ; Vandame, Rémy (autor) ;
Contenido en: Biological Conservation Vol. 236 (August 2019), p. 269-280 ISSN: 0006-3207
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

The conservation of pollinator diversity is fundamental to maintaining sustainable agricultural systems and food security. Some agricultural systems support pollinator diversity, while others may lead to their decline. Previous studies have evaluated the impacts of agricultural intensification on pollinators in temperate climates regions, but in tropical regions these impacts have been evaluated by only very few studies. We conducted a study in southeastern Mexico, in order to understand the effects of three agricultural systems on bee diversity in a tropical landscape. We compared 18 sites at two different scales (plot scale and landscape scale). We found a link between agricultural system intensity level at the plot scale and forest proportion at the landscape scale: land use intensity was low at both scales in 7 polycultures, low at plot scale and high at landscape scale in 4 pastures, and high at both scales in 7 monocultures. We collected bees at all sites, and found an overall high bee richness, with a total of 127 species. Bee richness was compared across agricultural systems using diversity accumulation curves with iNEXT package. Both polycultures and pastures had significantly higher richness as monocultures. We constructed bee species guilds according to ecological and life-history traits (i.e. size, sociality and nesting) and found that whatever the trait considered, the species richness in the different agricultural systems was most often affected in the same way than the complete community richness.

Our results show, for the first time in tropical conditions that agricultural systems with low-intensity farming practices and forested landscape allow the preservation of a significantly higher diversity of bees than agricultural systems with high-intensity farming practices and highly deforested landscape. Considering that bee diversity is key to maintaining crop productivity, these findings can help scientists, policy-makers, and community members design policies that support both agricultural production and biodiversity conservation in the tropics.


9.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Demography of a genetic sexing strain of Anastrepha ludens (Diptera: Tephritidae): effects of selection based on mating performance
Quintero Fong, José Luis ; Toledo, Jorge (coaut.) ; Ruiz Montoya, Lorena (coaut.) (1964-) ; Rendón Arana, Pedro Alfonso (coaut.) ; Orozco Dávila, Dina (coaut.) ; Valle Mora, Javier Francisco (coaut.) ; Liedo Fernández, Pablo (coaut.) ;
Contenido en: Agricultural and Forest Entomology Vol. 20, no. 1 (February 2018), p. 1-8 ISSN: 1461-9555
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

1. Tapachula-7 is a genetic sexing strain of Anastrepha ludens (Loew) (Diptera: Tephritidae) developed for the application of the sterile insect technique (SIT). To improve the sexual performance of this strain, a mass-reared colony was established from males selected for their sexual competitiveness. 2. Males from selected colonies are more sexually competitive than nonselected males. The present study aimed to analyse the demographic changes recorded in the study colony throughout four consecutive generations, comparing this colony with the parental colony and a wild strain. 3. The results obtained showed that, in the selected strain, fecundity increased, whereas survival diminished, compared with the laboratory parental strain. The increases in fecundity rates were observed at the first generation after selection. No changes were observed in the duration of the reproductive period in the selected strain. 4. Compared with wild flies, selected flies had lower life expectancy, earlier and shorter reproductive period, and greater daily fecundity at young ages (10–30 days), although with lower lifetime fecundity rates. 5. The four generations of the selected colony showed similar patterns of survival and reproduction. The better mating performance and the increase in early fecundity suggest that selection could contribute to improve rearing efficiency and SIT effectiveness.


10.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Insecticide resistance of adults and nymphs of Asian citrus psyllid populations from Apatzingán Valley, Mexico
Pardo, Saúl ; Martínez, Ana Mabel (coaut.) ; Figueroa, José Isaac (coaut.) ; Chavarrieta, Juan Manuel (coaut.) ; Viñuela Sandoval, Elisa (coaut.) ; Rebollar Alviter, Ángel (coaut.) ; Miranda Salcedo, Mario A. (coaut.) ; Valle Mora, Javier Francisco (coaut.) ; Pineda, Samuel (coaut.) ;
Contenido en: Pest Management Science Vol. 74, no. 1 (January 2018), p. 135-140 ISSN: 1526-498X
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Background: Control of the Asian citrus psyllid Diaphorina citri Kuwayama, the most important pest of citrus worldwide, is based on the use of insecticides, though unsatisfactory results have recently been reported. In this study, insecticide resistance of D. citri to three insecticides (bifenthrin,malathion, and chlorpyrifos) was examined. Results: Three populations (designated Dci-CParácuaro, Dci-El Junco, and Dci-Antúnez) of both adults and fourth-instar D. citri individuals were collected in 2014 at two different times and on one occasion, respectively, from three locations (Crucero de Parácuaro, El Junco, and Antúnez). These locations represent the major commercial Mexican lemon production areas in the Apatzingán Valley in the state of Michoacán, Mexico. The three populations of D. citri adults and fourth-instar nymphs at the different collection times showed low levels of resistance (≤7-fold) to bifenthrin, but were very resistant to malathion (≤345- and≤432-fold for adults and fourth instars, respectively) and chlorpyrifos (≤2435- and≤1424-fold for adults and fourth instars, respectively). Conclusion: Resistance levels to the tested insecticideswere highly variable but homogeneous among seasons and localities. Resistance management programmes that include crop sanitation, use of biological and cultural control practices, and rotation of insecticide classes should be established, particularly in areas where D. citri has developed resistance to malathion and chlorpyrifos.