منابع مشابه
Crab spiders affect flower visitation by bees
In a field experiment, the bumblebee, B. ternarius, visited milkweed patches harboring crab spiders, Misumena atia, at a lower frequency than patches free of crab spiders, and honeybees showed a similar but non-significant trend. Two other bumblebee species, B. terricola and B. agans, did not avoid the spider patches. The latter two species are larger than B. ternarius and honeybees and suffer ...
متن کاملTowards a DNA Barcode Reference Database for Spiders and Harvestmen of Germany
As part of the German Barcode of Life campaign, over 3500 arachnid specimens have been collected and analyzed: ca. 3300 Araneae and 200 Opiliones, belonging to almost 600 species (median: 4 individuals/species). This covers about 60% of the spider fauna and more than 70% of the harvestmen fauna recorded for Germany. The overwhelming majority of species could be readily identified through DNA ba...
متن کاملColouration in crab spiders: substrate choice and prey attraction.
Australian crab spiders Thomisus spectabilis ambush pollinating insects, such as honeybees (Apis mellifera) on flowers, and can change their body colour between yellow and white. It is traditionally assumed that the spiders change their colour to match the flower colour, thus rendering them cryptic to insect prey. Here, we test this assumption combining state-of-the-art knowledge of bee vision ...
متن کاملCrab spiders from Xishuangbanna, Yunnan Province, China (Araneae, Thomisidae)
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متن کاملSpiders as Robust Point Descriptors
This paper introduces a new operator to characterize a point in an image in a distinctive and invariant way. The robust recognition of points is a key technique in computer vision: algorithms for stereo correspondence, motion tracking and object recognition rely heavily on this type of operator. The goal in this paper is to describe the salient point to be characterized by a constellation of su...
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ژورنال
عنوان ژورنال: Journal of Arachnology
سال: 2001
ISSN: 0161-8202,1937-2396
DOI: 10.1636/0161-8202(2001)029[0273:hacocs]2.0.co;2