Ecological traps for dragonflies in a cemetery: the attraction of Sympetrum species (Odonata: Libellulidae) by horizontally polarizing black gravestones
作者: GÁBOR HORVÁTHPÉTER MALIKGYÖRGY KRISKAHANSRUEDI WILDERMUTH
作者单位: 1Biooptics Laboratory, Department of Biological Physics, Physical Institute, Eötvös University, Budapest, Hungary
2 Group for Methodology in Biology Teaching, Biological Institute, Eötvös University, Hungary
3 Institute of Zoology, University of Zürich, Zürich, Switzerland
刊名: Freshwater Biology, 2007, Vol.52 (9), pp.1700-1709
来源数据库: Wiley Journal
DOI: 10.1111/j.1365-2427.2007.01798.x
关键词: black gravestonesecological trapOdonatapolarization visionwater detection
原始语种摘要: Summary(#br)1. We observed that the dragonfly species Sympetrum flaveolum , S. striolatum , S. sanguineum , S. meridionale and S. danae were attracted by polished black gravestones in a Hungarian cemetery.(#br)2. The insects showed the same behaviour as at water: (i) they perched persistently in the immediate vicinity of the chosen gravestones and defended their perch against other dragonflies; (ii) flying individuals repeatedly touched the horizontal surface of the shiny black tombstones with the ventral side of their body; (iii) pairs in tandem position frequently circled above black gravestones.(#br)3. Tombstones preferred by the dragonflies were in the open and had an area of at least 0.5 m2 with an almost horizontal, polished, black surface and with at least one perch in...
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