منابع مشابه
Visual perception of motion in a hunting spider.
Like most other spiders Cupiennius salei (Keyserling 1877) has two different eye types, one pair of principal eyes and three pairs of secondary eyes. The principal eyes have two eye muscles each, which allow movement of the retina and are mainly used for the discrimination of stationary objects. The secondary eyes without such eye muscles are supposed to detect moving objects. Masking experimen...
متن کاملOn the performance of the visual system in the nocturnal hunting spider Cupiennius salei
............................................................................................................................. 1 Zusammenfassung ............................................................................................................. 3 Synopsis .............................................................................................................................. 5 The...
متن کاملExplaining the Safavid hunting ground Corner and Medallion carpet design, (case study: the Poldi Pezzoli Museum hunting ground Carpet).
Hunting and animal’s combat design of animals in the Safavid era has been reflected in various compositions of carpet designs as they are combined with Floral, Medallion, and Corner and Medallion patterns. One of the significant examples of a hunting ground corner and Medallion carpet are the ones held in the Poldi Pezzoli Museum, Milan. In this carpet, hustling hunting scenes have been depicte...
متن کاملBody size, host choice and sex allocation in a spider-hunting pompilid wasp
Two important relationships in parasitoid evolutionary ecology are those between adult size and fitness and between host quality and sex ratio. Sexually differential size–fitness relationships underlie predicted sex-ratio relationships. Despite each relationship receiving considerable attention, they have seldom been studied simultaneously or using field data. Here we report the biology of Anop...
متن کاملEffects of Habitat Fragmentation on Abundance, Larval Food and Parasitism of a Spider-Hunting Wasp
Habitat fragmentation strongly affects species distribution and abundance. However, mechanisms underlying fragmentation effects often remain unresolved. Potential mechanisms are (1) reduced dispersal of a species or (2) altered species interactions in fragmented landscapes. We studied if abundance of the spider-hunting and cavity-nesting wasp Trypoxylon figulus Linnaeus (Hymenoptera: Crabronida...
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ژورنال
عنوان ژورنال: Nature
سال: 1879
ISSN: 0028-0836,1476-4687
DOI: 10.1038/020581b0