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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ibrahim, Y. B. Rahman, R. B. Abdul |
| Copyright Year | 1997 |
| Abstract | The influence of prey density, species and developmental stages on the predatory behaviour ofAmblyseius longispinosus (Evans) was studied. A 24 h exposure revealed that gravid females were more voracious compared to young females. The trends in the number of eggs and larvae consumed by each young and gravid female predator were about the same, showing an increase with density of the red and the yellow strains ofT. urticae levelling off at a prey density of 40 per predator. The highest mean number of eggs consumed in 24 h was 16.7 for the young female and 33.3 for the gravid female, and a mean high of 17 larvae in 24 h for the young female and 27.8 for the gravid female. With adult prey, however, the predators reached satiation point at a lower density of five to ten adult prey per female. In general, the response curves were adequately described by the Holling’s Type II model. Under continuous exposure for five days, a significant reduction in consumption was observed with the gravid female from the second day onwards, to a level similar to the number of eggs and larvae consumed by a young female predator.L’influence de la densité des proies, du type de proie et du stade de développement sur le comportement prédateur d’Amblyseius longispinosus (Evans) a été étudiée. Une exposition de 24 h a montré que les femelles pleines d’œufs étaient plus voraces que les jeunes femelles. Le mode de consommation des œufs et des larves pour chaque jeune femelle et chaque femelle pleine était assez similaire en nombre, montrant un accroissement en relation avec la densité chez les souches « rouges » ou « jaunes « deTetranychus urticae, atteignant un palier pour une densité de 40 proies par prédateur. Le nombre moyen le plus élevé d’oeufs consommés en 24 h était de 16,7 pour les jeunes femelles et de 33,3 pour les femelles âgées; en moyenne les jeunes femelles consommaient 17 larves en 24 h et les femelles pleines 27,8 larves. Dans le cas de proies adultes cependant, les prédateurs atteignaient un niveau de satiété à une densité plus faible, de 5 à 10 adultes par femelle. En général, les courbes de réponse correspondaient exactement au modèle de Holling de type II. Si l’on exposait le prédateur à sa proie de manière continue pendant 5 jours, une réduction significative de la consommation était observée chez les femelles pleines à partir du deuxième jour, jusqu’à un niveau similaire au nombre d’œufs et de larves consommées par une jeune femelle prédatrice. |
| Starting Page | 319 |
| Ending Page | 327 |
| Page Count | 9 |
| File Format | |
| ISSN | 00138959 |
| Journal | BioControl |
| Volume Number | 42 |
| Issue Number | 3 |
| e-ISSN | 15738248 |
| Language | French |
| Publisher | Springer Netherlands |
| Publisher Date | 1997-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | consumption prey density predator behaviour Tetranychus urticae Amblyseius longispinosus Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioural Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Ecology, Evolution, Behavior and Systematics Agricultural and Biological Sciences |
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