Oviposition and predation by Speciomerus revoili (Coleoptera, Bruchidae) on seeds of Acrocomia aculeata (Arecaceae) in Brasília, DF, Brazil

Ramos, F. A.; Martins, Ivan Carlos Fernandes; Farias, Jamile; Silva, I. C. S.; Costa, Deliane Cristina; Miranda, A.

doi:10.1590/s1519-69842001000300014

Cited by 16 publications

(11 citation statements)

References 21 publications

(37 reference statements)

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“…These results were consistent with other studies involving bruchine beetles that readily utilize loose seeds (Siemens & Johnson 1996in Ramos et al 2001Cope & Fox 2003). Small and medium-sized seeds (i.e.…”

Section: Discussionsupporting

confidence: 92%

Does the Size of the Seeds and Seed Pods of the Invasive TreeLeucaena leucocephala(Fabaceae) Affect Their Utilization by the Biological Control AgentAcanthoscelides macrophthalmus(Chrysomelidae: Bruchinae)?

English

Olckers²

2014

African Entomology

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Section: Discussionsupporting

confidence: 92%

Does the Size of the Seeds and Seed Pods of the Invasive TreeLeucaena leucocephala(Fabaceae) Affect Their Utilization by the Biological Control AgentAcanthoscelides macrophthalmus(Chrysomelidae: Bruchinae)?

English

Olckers²

2014

African Entomology

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“…Esto indica la preferencia por oviposición de los insectos en frutos que garanticen la supervivencia de las larvas hasta la fase de adultos. Sin embargo, la densidad de huevos por fruto no necesariamente está relacionada con el tamaño del fruto, tal y como se ha reportado en el caso de Acrocomia aculeata, debido a que el insecto Speciomerus revoili no selecciona los frutos grandes para ovipositar (Ramos, 2001). …”

Section: Discussionunclassified

El tamaño sí importa: los frutos grandes de Juniperus deppeana Steud. (sabino) son más susceptibles a depredación por insectos

Martínez

Sainos

Delgado

et al. 2016

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RESUMENEl siguiente trabajo documenta la relación entre el tamaño de los frutos (gálbulos) de Juniperus deppeana Steud. y el daño ocasionado por insectos depredadores de semillas en un fragmento de bosque de sabinos, característico del estado de Tlaxcala, México. En el estudio se seleccionaron árboles femeninos del sabino para cuantificar la maduración de los gálbulos y se clasificó la disponibilidad de éstos en tres categorías de tamaño: pequeños (5 a 9 mm), medianos (10 a 12 mm) y grandes (13 a 15 mm), cuantificando al mismo tiempo el número y la densidad de gálbulos intactos y aquellos que habían sido dañados por insectos, comparaciones que se realizaron durante cinco muestreos. La producción de gálbulos en J. deppeana fue continua durante las cinco fechas de colecta. Entre 21 a 46 de los individuos presentaron frutos en 50-70% del árbol (por estimación visual). También, las categorías de 5 a 30% de abundancia de gálbulos en las copas la presentaron entre 19 a 31 de los individuos femeninos de sabinos durante las cinco fechas de cuantificaciones porcentuales. Los sabinos hembras produjeron frutos continuamente de agosto de 2004 a agosto de 2005. Aunque hubo siempre una amplia disponibilidad de gálbulos grandes, pequeños y medianos, fueron los de mayor tamaño los más dañados por insectos, ya que hasta 30% de los frutos grandes presentaban orificios de salida de insectos depredadores de semillas.PALABRAS CLAVE: Biología reproductiva, gálbulos, insectos semillívoros, Juniperus deppeana, sabino. ABSTRACTThe relationship between fruit size of Juniperus deppeana and damage caused by seed predator insects, in a forest fragment of Juniperus deppeana (sabino), typical of the state of Tlaxcala, Mexico was analyzed. Female trees were selected to quantify fruit maturation. Their availability were classified into three categories: small (5 to 9 mm), medium (10-12 mm), and large (13 to 15 mm). At the same time, the amount and density of intact fruits and those presenting insect damage were quantified on five different samplings. Between 21-46 of the individuals presented fruits in 50 to 70% of the tree (by visual estimation). Also, categories of 5 to 30% of galbule abundance in the crowns were presented in 19 to 31 of the female individuals during the five different dates when the per cent quantifications were made. Female individuals produced fruits continuously from august 2004 to august 2005. Although there was always a wide availability of large, medium, and small fruits, the first ones

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“…ex. Martius (Arecaceae), insect attacks on its fruits have already been reported during pre- and post-dispersal [37] , [39] . The attack by insects on fruits during pre-dispersal is restricted to the epicarp and mesocarp of the propagule and is performed mainly by larvae of Coleoptera and Lepidoptera (Author’s personal observation).…”

Section: Introductionmentioning

confidence: 99%

Ecological Interactions Shape the Dynamics of Seed Predation in Acrocomia aculeata (Arecaceae)

et al. 2014

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BackgroundThe complex network of direct and indirect relationships determines not only the species abundances but also the community characteristics such as diversity and stability. In this context, seed predation is a direct interaction that affects the reproductive success of the plant. For Acrocomia aculeata, the seed predation by Pachymerus cardo and Speciomerus revoili in post-dispersal may destroy more than 70% of the propagules and is influenced by the herbivory of the fruits during pre-dispersal. Fruits of plants with a higher level of herbivory during pre-dispersal are less attacked by predators in post-dispersal. We proposed a hypothesis that describes this interaction as an indirect defense mediated by fungi in a multitrophic interaction. As explanations, we proposed the predictions: i) injuries caused by herbivores in the fruits of A. aculeata favor fungal colonization and ii) the colonization of A. acuelata fruit by decomposing fungi reduces the selection of the egg-laying site by predator.Methodology/Principal FindingsFor prediction (i), differences in the fungal colonization in fruits with an intact or damaged epicarp were evaluated in fruits exposed in the field. For prediction (ii), we performed fruit observations in the field to determine the number of eggs of P. cardo and/or S. revoili per fruit and the amount of fungal colonization in the fruits. In another experiment, in the laboratory, we use P. cardo females in a triple-choice protocol. Each insect to choose one of the three options: healthy fruits, fruits with fungus, or an empty pot. The proposed hypothesis was corroborated. Fruits with injuries in the epicarp had a higher fungal colonization, and fruits colonized by fungi were less attractive for egg-laying by seed predators.Conclusion/SignificanceThis study emphasizes the importance of exploring the networks of interactions between multitrophic systems to understand the dynamics and maintenance of natural populations.

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Oviposition and predation by Speciomerus revoili (Coleoptera, Bruchidae) on seeds of Acrocomia aculeata (Arecaceae) in Brasília, DF, Brazil

Cited by 16 publications

References 21 publications

Does the Size of the Seeds and Seed Pods of the Invasive TreeLeucaena leucocephala(Fabaceae) Affect Their Utilization by the Biological Control AgentAcanthoscelides macrophthalmus(Chrysomelidae: Bruchinae)?

Does the Size of the Seeds and Seed Pods of the Invasive TreeLeucaena leucocephala(Fabaceae) Affect Their Utilization by the Biological Control AgentAcanthoscelides macrophthalmus(Chrysomelidae: Bruchinae)?

El tamaño sí importa: los frutos grandes de Juniperus deppeana Steud. (sabino) son más susceptibles a depredación por insectos

Ecological Interactions Shape the Dynamics of Seed Predation in Acrocomia aculeata (Arecaceae)

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