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Food Quality Influences Ovarian Development inScyphophorus acupunctatus(Coleoptera: Dryophthoridae)

Authors: Vega-Petlacalco, Maritza; Arzuffi, René; Valdez, Jorge; Rodríguez-Monroy, Mario; Jiménez-Pérez, Alfredo; Robledo, Norma;

Food Quality Influences Ovarian Development inScyphophorus acupunctatus(Coleoptera: Dryophthoridae)

Abstract

This paper describes the anatomy of the female reproductive system of the agave weevil, Scyphophorus acupunctatus Gyllenhall (Coleoptera: Dryophthoridae). This insect is considered a primary pest of agave ( Agave spp.) (Asparagaceae) and tuberose ( Polianthes tuberosa L.) (Asparagaceae) in Mexico. Developmental biology and ovarian maturation of laboratory-reared S. acupunctatus fed a meridic diet was compared with individuals fed tuberose bulbs. Ovarian maturation was classified according to ovariole and follicle differentiation, as well as the presence of follicular relics. This classification yielded 1 parous and 3 nulliparous stages. We found that ovarian maturation was delayed for those weevils fed the meridic diet compared with those fed tuberose bulbs. Also, the greatest number of ovarian follicles occurred in individuals fed tuberose bulbs; however, this relationship changed with the age of the insect. Proximal length and follicular area also varied according to age and type of diet. We believe that the ovarian developmental stages described here for S. acupunctatus could be a useful method to monitor parity status of field populations when assessing the effectiveness of control programs for this weevil pest. Resumen En este trabajo se describe por primera vez la morfologia del sistema reproductor femenino del picudo del agave, Scyphophorus acupunctatus Gyllenhall (Coleoptera: Dryophthoridae). Este insecto es considerado la principal plaga del agave ( Agave spp.) (Asparagaceae) y nardo ( Polianthes tuberosa L.) (Asparagaceae) en Mexico. Se comparo el desarrollo biologico y la maduracion ovarica de individuos alimentados con dieta meridica y los alimentados con bulbos de nardo. La clasificacion de la maduracion ovarica se baso en la diferenciacion de ovariolas y foliculos, la presencia de reliquias foliculares u ovulacion. Esta clasificacion comprende 1 paro y 3 estadios nuliparos. Encontramos que los picudos alimentados con dieta meridica sufren un retraso en su maduracion ovarica en comparacion con los alimentados con nardo. Ademas, el mayor numero de foliculos se presento en individuos alimentados con nardo. Sin embargo, esta relacion cambio con la edad. La longitud y el area del foliculo proximo se modificaron dependiendo de la edad y el tipo de alimento. La informacion presentada en este estudio permite conocer la madurez sexual de Scyphophorus acupunctatus obtenidos del campo, la cual proporciona una valiosa guia para monitorear la efectividad de las acciones de su manejo. View this article in BioOne

Keywords

Biodiversity, Taxonomy

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Top 10%
Average
Average
Green
gold