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| Nakashima, Yoshitaka; Birkett, Michael A.; Pye, Barry J.; Powell, Wilf; 仲島, 義貴. |
| The avoidance responses of aphid parasitoids with varying host ranges (Aphidius eadyi, Aphidius ervi, and Praon volucre) to chemical trails deposited by intraguild predatory ladybirds, Coccinella septempunctata and Adalia bipunctata, were investigated. Females of all three parasitoid species avoided leaves previously visited by C. septempunctata or A. bipunctata adults. The avoidance responses shown by the two Aphidius species were stronger to trails of C. septempunctata than to those of A. bipunctata. However, P. volucre avoided trails of both ladybird species to a similar degree. Dose responses of these three parasitoid species to the hydrocarbons n-tricosane (C23H48), n-pentacosane (C25H52), and n-heptacosane (C27H56), which are components of the trails... |
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Palavras-chave: Intraguild predation; Predator avoidance; Trail; Oviposition decision; Host range; Habitat similarity; Dose response. |
| Ano: 2006 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/810 |
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| Martins,Camila B. C.; Almeida,Lúcia M.; Zonta-de-Carvalho,Regina C.; Castro,Camila F.; Pereira,Rosylaine A.. |
| Harmonia axyridis (Pallas) (Coleoptera, Coccinellidae) is a polyphagous Asian species, well-known as a classical biological control agent of aphids around the world, introduced probably accidentally in Brazil, sampled for the first time in 2002. It is an important intraguild predator, competing for food with native coccinellids. It was studied H. axyridis alimentary sources and host plants, its abundance compared with native and established species, the influence of abiotic factors and the seasons over the abundance of H. axyridis throughout one year, and discussed the mechanisms which influence the displacement of species. Harmonia axyridis was found in 38 plant species, among them 20 were new records, feeding on 20 aphid species, eight of them new... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphididae; Intraguild predation; Invasive species; Native species. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000400018 |
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| Djeghri, Nicolas; Atkinson, Angus; Fileman, Elaine S.; Harmer, Rachel A.; Widdicombe, Claire E.; Mcevoy, Andrea J.; Cornwell, Louise; Mayor, Daniel J.. |
| There has been an upsurge of interest in trait-based approaches to zooplankton, modelling the seasonal changes in the feeding modes of zooplankton in relation to phytoplankton traits such as size or motility. We examined this link at two English Channel plankton monitoring sites south of Plymouth (L4 and El). At L4 there was a general transition from diatoms in spring to motile microplankton in summer and autumn, but this was not mirrored in the succession of copepod feeding traits; for example the ambushing Oithona similis dominated during the spring diatom bloom. At nearby El we measured seasonality of food and grazers, finding strong variation between 2014 and 2015 but overall low mesozooplankton biomass (median 4.5 mg C m(-3)). We also made a seasonal... |
| Tipo: Text |
Palavras-chave: Copepod; Zooplankton biomass; Feeding; Selectivity; Intraguild predation; Predator-prey size ratio; Western Channel Observatory; Sloppy feeding. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00616/72783/83484.pdf |
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| Magioli,Marcelo; Ferraz,Katia Maria P. M de Barros. |
| Abstract The jaguarundi (Puma yagouaroundi) is the second most widespread carnivore of the Americas, and considered a threatened species in Brazil. However, most of its ecology is unknown, and few information is available about species that may act as its predator. In this study we present evidence of the predation of a jaguarundi by puma (Puma concolor) in a protected area (Carlos Botelho State Park) in the state of São Paulo, southeastern Brazil. We collected fecal samples in trails and dirt roads in the study area, and by using hair cuticle imprints and medullar patterns, we identified a puma scat containing hair and claws of a jaguarundi. Pumas usually consume carnivores, but the presence of felids is uncommon, especially in Brazil. This could be... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Intraguild predation; Trophic interactions; Diet; Felids; Feces. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000100501 |
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| Nakashima, Yoshitaka; Birkett, Michael A.; Pye, Barry J.; Pickett, John A.; Powell, Wilf; 仲島, 義貴. |
| The role of semiochemicals in mediating intraguild interactions between the seven-spot ladybird, Coccinella septempunctata, and the aphid parasitoid, Aphidius ervi, was investigated. Female parasitoids avoided leaves visited by C. septempunctata adults and larvae during the previous 24 hr. Ethanol extracts of C. septempunctata adults and larvae also induced avoidance responses by A. ervi. Two of the hydrocarbons identified by gas chromatography ( GC) and coupled GC-mass spectrometry (GC-MS), n-tricosane (C23H48), and n-pentacosane (C25H52), when tested individually at levels found in the adult extract, induced avoidance by A. ervi. Further investigation of the larvae extract, and footprint chemicals deposited by adults in glass Petri dishes, confirmed the... |
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Palavras-chave: Intraguild predation; Predator avoidance; Trail; Oviposition decision; Biological control; N-tricosane; N-pentacosane. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/809 |
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