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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2019 Vol.38 No.5

Study on the Relationship Between Host Preference and Cutting Branch Behaviors of Mechorhis ursulus Roelofs
Author of the article:LI Wei1#, ZHAO Qianqian1#, ZHANG Zhiying1*, LI Yuhui2, GE Jia3, HU Shaoji4
Author's Workplace:1. Institute of Ecology and Environment, Yunnan University, Kunming 650091, China;
2. School of Tourist and Geographical Sciences, Yunnan Normal University, Kunming 650500, China;
3. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;
4. Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650091, China
Key Words:Mechorhis ursulus Roelofs; Fagaceae; host preference; branch-cutting behavior; fruit branch diameter
Abstract:Mechorhis ursulus Roelofs (Coleoptera:Attelabidae) damages the nuts of many kinds of Fagaceae plants by its special behavior of cutting fruit branches on which eggs have been laid. This is one of the reasons for natural regeneration difficulty of influenced Fagaceae plants. The damages of M. ursulus on Fagaceae trees were investigated in Kunming Plant Garden, including genera Cyclobalanopsis, Quercus, Lithocarpus, and Castanea. The content of protein, crude fat, crude fiber and tannin in the seeds, and the diameter of the fruit branches were measured. The eggs of M. ursulus were artificially introduced into the seeds of different plants, and the survival rate and body mass of the larva were recorded. The results showed that the preferred hosts of M. ursulus were C. glaucoides and Q. franchetii in the studied area. The nutrition and tannin content among 8 plants' seeds had no significant difference. Furthermore, no significant differences of survival rate and body mass were detected between the larvae from the host and non-host plants' seeds. However, the damage degree of Fagaceae plants by M. ursulus was related to the fruit branch diameter. These results revealed that M. ursulus had a significant preference for the host plants, especially the fruit branch diameter.
2019,38(5): 526-530 收稿日期:2018-09-27
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