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Larval Behavior Probably Associated with Respiration inLuciola substriataGorham (Coleoptera: Lampyridae)

kila 添加于 2010-5-18 19:45 | 2192 次阅读 | 0 个评论

作者
Zheng X, Fu X, Zhang S, Lei C
摘要
When attacked or otherwise disturbed, larvae of the aquatic firefly Luciola leii display fork-shaped glands laterally from the meso- and metathorax as well as each abdominal segment. Glandular eversion is accompanied by a strong pine oil-like odour, thanatosis and glowing from paired larval light organs. Observations by SEM and TEM revealed that there are numerous, almost spherical protuberances, measuring 9 µm in diameter on the surface of each gland. Each protuberance is connected to a well developed secretory cell via a 0.1 µm thick and 0.2 µm long stalk and bears three to six 7 µm long spines on its apex. The convoluted glandular walls measure 0.2 µm. The cytoplasm of the secretory cells is characterized by the presence of numerous mitochondria and an extensive system of cisternae and tubular endoplasmic reticulum. Preliminary GC-MS analysis of the glandular secretion revealed two volatile terpenoids: terpinolene and γ-terpinene. Choice and no-choice bioassays involving fish and ants as well as other predators demonstrate that the secretions serve as an effective deterrent against a range of ecologically relevant enemies. The larval postural adjustments, light emission, everted glands, and glandular release of distasteful or repellent compounds, appear to function as a multi-modal, aposematic larval defence. The tandem evolution of glandular secretions and conspicuousness in larval fireflies could partially explain their successful radiation into both aquatic and terrestrial habitats.
详细资料
- 文献种类:期刊
- 期刊名称: The Coleopterists Bulletin
- 期刊缩写: The Coleopterists Bulletin
- 期卷页: 2008年第62卷第4期 550-559页
- ISBN: 0010-065X
所属群组

昆蟲標本盒
标签

2007 CN Zoology Entomology Coleoptera Lampyridae Ecology
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