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Host use and resource sharing by fruit/seed-infesting insects on schoepfia schreberi (Olacaceae)

López Ortega, Maurilio | Pérez Rodríguez, Paulino [autor/a] | Rojas, Julio C [autor/a] | Soto Hernández, Ramón Marcos [autor/a] | López Mata, Lauro [autor/a] | Rico Gray, Víctor [autor/a].
Tipo de material: Artículo impreso(a) Artículo impreso(a) Tema(s): Moscas de la fruta | Anastrepha spatulata | Schoepfia schreberi | Plantas huéspedesDescriptor(es) geográficos: La Camelia (Veracruz de Ignacio de la Llave, México) | Osto (Veracruz de Ignacio de la Llave, México) | Tejeria (Veracruz de Ignacio de la Llave, México)Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Environmental Entomology. volumen 42, número 2 (2013), páginas 231-239. --ISSN: 0046-225XNúmero de sistema: 18006Resumen:
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The interactions between the fruit fly Anastrepha spatulata Stone (Diptera: Tephritidae) and two species of moths, the gelechiid Coleotechnites sp. and an unidentified tortricid species, were examined on their effects on seed production in terms of their exploitation within fruits of Schoepfia schreberi J.F. Gmel (Santalales: Olacaceae). The study was carried out in three experimental sites during 3 yr. Under conditions of abundant fruit, A. spatulata was the dominant exploiter at the population level, as shown by its ability to infest the largest number of fruits of the three herbivores and substantially displace its moth competitors. In a separate experiment, when resource-partitioning species were excluded, A. spatulata infested twice as many fruits as the two moth species (44.3%). Field observations examined the ability of A. spatulata to locate suitable fruits. We found that, the variation in fruit characters influenced fruit suitability in relation to its size (4.1261 ± 0.0272 mm [mean ± SE]) and weight (0.0618 ± 0.0005 mg [mean ± SE]). Uninfested fruits produce viable seed but the interaction of all species (exploiting for the fruits) led to limited seed formation.
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The interactions between the fruit fly Anastrepha spatulata Stone (Diptera: Tephritidae) and two species of moths, the gelechiid Coleotechnites sp. and an unidentified tortricid species, were examined on their effects on seed production in terms of their exploitation within fruits of Schoepfia schreberi J.F. Gmel (Santalales: Olacaceae). The study was carried out in three experimental sites during 3 yr. Under conditions of abundant fruit, A. spatulata was the dominant exploiter at the population level, as shown by its ability to infest the largest number of fruits of the three herbivores and substantially displace its moth competitors. In a separate experiment, when resource-partitioning species were excluded, A. spatulata infested twice as many fruits as the two moth species (44.3%). Field observations examined the ability of A. spatulata to locate suitable fruits. We found that, the variation in fruit characters influenced fruit suitability in relation to its size (4.1261 ± 0.0272 mm [mean ± SE]) and weight (0.0618 ± 0.0005 mg [mean ± SE]). Uninfested fruits produce viable seed but the interaction of all species (exploiting for the fruits) led to limited seed formation. eng

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