Utilization of emergent plants as an aestivation habitat by the Trapa-feeding leaf beetle (Galerucella nipponensis) in Lake Inba, Japan
| Autor: | Maiko Kagami, Natsumi Nakanishi, Shota Tanimura, Takeo Kuriyama, Shun Takagi |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Ecology biology 010604 marine biology & hydrobiology Foraging Aquatic Science Diapause biology.organism_classification 010603 evolutionary biology 01 natural sciences food.food food Water Chestnuts Habitat Aestivation Galerucella nipponensis Eutrophication Water Science and Technology Leaf beetle |
| Zdroj: | Limnology. 20:13-19 |
| ISSN: | 1439-863X 1439-8621 |
| DOI: | 10.1007/s10201-018-0545-3 |
| Popis: | Water chestnuts (Trapa spp.) dominate many shallow eutrophic lakes, and impact aquatic fauna. Use of Trapa beds by animals may vary with the growth stage of Trapa, but little is known regarding when and how animals use Trapa and nearby, non-Trapa habitat. To clarify seasonal habitat use by the Trapa-feeding chrysomelid beetle (Galerucella nipponensis), we examined seasonal changes in the density of G. nipponensis from Trapa beds and from adjacent emergent vegetation. Furthermore, to determine whether habitat use by beetles is associated with their physiological state, we measured their oviposition and foraging activities. The density of G. nipponensis in each life-stage changed seasonally, with a high density of adults inhabiting emergent vegetation in July, after beetle densities in Trapa beds had declined. Adults collected from Trapa beds showed active egg-laying and foraging activities, while beetles collected from emergent vegetation were in reproductive diapause. This is the first report of G. nipponensis leaving its host plant to initiate summer diapauses in another habitat type. |
| Databáze: | OpenAIRE |
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