منابع مشابه
Once a Batesian mimic, not always a Batesian mimic: mimic reverts back to ancestral phenotype when the model is absent.
Batesian mimics gain protection from predation through the evolution of physical similarities to a model species that possesses anti-predator defences. This protection should not be effective in the absence of the model since the predator does not identify the mimic as potentially dangerous and both the model and the mimic are highly conspicuous. Thus, Batesian mimics should probably encounter ...
متن کاملMultiple selective pressures apply to a coral reef fish mimic: a case of Batesian-aggressive mimicry.
Mimics closely resemble unrelated species to avoid predation, capture prey or gain access to hosts or reproductive opportunities. However, the classification of mimicry systems into three established evolutionary mechanisms (protection, reproduction and foraging) can be contentious because multiple benefits may be gained by mimics, causing the evolution of such systems to be driven by more than...
متن کاملMolecular basis of wing coloration in a Batesian mimic butterfly, Papilio polytes
Batesian mimicry protects animals from predators through resemblance with distasteful models in shape, color pattern, or behavior. To elucidate the wing coloration mechanisms involved in the mimicry, we investigated chemical composition and gene expression of the pale yellow and red pigments of a swallowtail butterfly, Papilio polytes, whose females mimic the unpalatable butterfly Pachliopta ar...
متن کاملthird world intellectuals in v. s. naipaul’s fiction: the mimic men, a bend in the river, magic seeds
this thesis attempts to study the representations of the third-world intellectuals in three fictional works by the british-educated trinidadian nobel-winner v. s. naipaul: the mimic men, a bend in the river, and magic seeds. the first one recounts the story of ralph singh’s sense of alienation, his experiences as a colonial politician, and his struggle to give order to his disorderly world thro...
15 صفحه اولImproved Lookup Algorithms for Viceroy
We present a new lookup algorithm for Viceroy, a peer-to-peer system, which outperforms the existing algorithm for the system, yet it is much simpler and easier to implement. We also present our fully-functional graphical simulation of Viceroy, and propose several other improved lookup (routing) algorithms for this network. We show experimental results to support our claims, and discuss the imp...
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ژورنال
عنوان ژورنال: Nature
سال: 1991
ISSN: 0028-0836,1476-4687
DOI: 10.1038/351611b0