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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sakuratani, Y. Nakamura, Y. |
| Copyright Year | 1997 |
| Abstract | In central Japan, females ofCoccinella septempunctata brucki laid eggs preferably on the under side of metal cans, wood and other materials, and the walls of a concrete gutter in sunny grasslands with colonies of aphids, in winter and spring. These materials have a high thermal conductivity, and are warmed readily by solar radiation. The development of eggs attached to these materials was accelerated by the heart from the materials. Most eggs attached to the upper surface of such materials did not hatch because they were either desiccated by direct solar radiation or eaten by predators. The under surface of metals is heated on sunny days by solar radiation, and the eggs are protected from desiccation and cannibalism. The shortening of incubation may be an adaptation to the rapid growth of aphid populations in early spring, and may reduce the chance of cannibalism.Dans le centre du Japon, on a observé que des femelles deCoccinella septempunctata brucki pondaient leurs oeufs de préférence sur la face inférieure des boîtes de conserve, du bois et autres matériaux, et sur les parois d’une gouttière en ciment, dans les prés ensoleillés où se trouvent des colonies de pucerons, en hiver et au printemps. Ces matériaux ont une conductivité thermique élevée et sont rapidement chauffés par les radiations du soleil. Le développement des œufs fixés sur ces matériaux est de ce fait accéléré par la chaleur réémise par ces matériaux. La plupart des œufs fixés sur la surface supérieure de tels matériaux n’éclosent pas car ils sont soit désséchés par le soleil soit dévorés par des prédateurs. La surface intérieure des objets en métal est chauffée pendant les journées ensoleillées et les œufs sont protégés de la dessication et du cannibalisme. Le raccourcissement de la durée de l’incubation peut être une adaptation à l’augmentation rapide des populations de pucerons au début du printemps et peut réduire le risque de cannibalisme. |
| Starting Page | 33 |
| Ending Page | 40 |
| Page Count | 8 |
| File Format | |
| ISSN | 00138959 |
| Journal | BioControl |
| Volume Number | 42 |
| Issue Number | 1-2 |
| 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 | 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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