منابع مشابه
Hermit crabs
Researchers had been divided over whether the sound was vocal or not, but the latest study, published online in the Royal Society Proceedings B shows unequivocally that the tail feathers were the source of the sound. When the researchers cut back the tail feathers — which grow back in five weeks and do not affect the birds ability to fly — the males were unable to make the noise. Tests in wind ...
متن کاملResting metabolic rates of two orbweb spiders: a first approach to evolutionary success of ecribellate spiders.
Spiders are considered conservative with regard to their resting metabolic rate, presenting the same allometric relation with body mass as the majority of land-arthropods. Nevertheless, web-building is thought to have a great impact on the energetic metabolism, and any modification that affects this complex behavior is expected to have an impact over the daily energetic budget. We analyzed the ...
متن کاملA GIS Model Predicting Potential Distributions of a Lineage: A Test Case on Hermit Spiders (Nephilidae: Nephilengys)
BACKGROUND Although numerous studies model species distributions, these models are almost exclusively on single species, while studies of evolutionary lineages are preferred as they by definition study closely related species with shared history and ecology. Hermit spiders, genus Nephilengys, represent an ecologically important but relatively species-poor lineage with a globally allopatric dist...
متن کاملThe HermiT OWL Reasoner
HermiT is the only reasoner we know of that fully supports the OWL 2 standard, and that correctly reasons about properties as well as classes. It is based on a novel “hypertableau” calculus that addresses performance problems due to nondeterminism and model size—the primary sources of complexity in state-of-the-art OWL reasoners. HermiT also incorporates a number of novel optimizations, includi...
متن کاملAn Association Between Two Neotropical Spiders (Araneae: Uloboridae and Tengellidae)
An interspecific association between two spider species (Araneae, Uloboridae and Tengellidae) was studied over a sixweek period at an Atlantic lowland wet forest site in Costa Rica. The uloborid Philoponella z~icziza builds orb webs among the frame lines of the platform web constructed by Tengella radiata Kulczynski, the much larger tengellid species. Experiments with marked P. zicina determine...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1905
ISSN: 0036-8733
DOI: 10.1038/scientificamerican11041905-24953bsupp