referencia alimentaria de arañas Misumenops pallidus(Araneae: Thomisidae) sobre potenciales insectos presa de cultivos de alfalfa
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| Autores: | , , |
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| Format: | artículo original |
| Status: | Versión publicada |
| Fecha de Publicación: | 2006 |
| Beskrivelse: | The spider Misumenops pallidus (Thomisidae) is commonly found in alfalfa crops. We studied its predatory preferences on potential insect prey, particularly regarding agroecosystems pests. Two kinds of tests were done under normal laboratory conditions: simultaneous presentation of prey (n= 215) and alternative prey test (n= 45). The spiders preferred insects that were mobile, small, without defensive glands and with thin exoskeletons. According to the amount of prey consumed, we established four predation levels: high (> 55%, on adult Drosophila melanogaster flies); intermediate (30% -55% on the defoliator larvae of Rachiplusia nu and adult heteropterans: Horciasinus argentinus and Halticus spegazzinii); and low (10%- 30% on the chrysomelids Colapsis sp.and Diabrotica speciosa). The pentatomid Piezodorus guildinii, the curculionid Naupactus sp. and the aphid Acyrthosiphom pisum were not accepted as food. Once the spider captured a prey item it did not accept another, independently of prey item species (82% of trials). |
| País: | Portal de Revistas UCR |
| Institution: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Sprog: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/13904 |
| Online adgang: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/13904 |
| Palabra clave: | araneae Thomisidae Misumenops pallidus depredación preferencia de presas alfalfa |