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Showing 1 to 14 of 14 for “"Crypsis"”.
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Crypsis in non-flying mammal pollinated Proteaceae: novel adaptations and evidence of nectarivorous bird avoidance
… pollinated (NMP) syndrome is inflorescence crypsis whereby flowers are close to the ground and somewhat hidden within the canopy. A number of species in the Cape Proteaceae are NMP, two of which were chosen as focal species for this study: Protea amplexicaulis and Protea humiflora. This …
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Polymorphism in Hawkmoth caterpillars - an ecological and biochemical study of crypsis in Smerinthus Ocellata (L.) and Laothoe Populi (L.)
Extensive field surveys in Lancashire and Merseyside have shown that for both Smerinthus ocellata (the eyed hawkmoth) and Laothoe populi (the poplar hawkmoth) there is a correlation between larval and foodplant coloration. For L. populi, experiments have shown that foodplant determines the colour …
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Milton's cryptic figures.
… shown how rhetorical figures in his epic display crypsis, a mode of writing which strategically employs ambiguities to meet special needs in a given rhetorical occasion (kairos). Crypsis consists of three categories: (1) Deficiency, the omission of something essential; (2) Redundancy, the addition …
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Seed morphology and colour variation in derotinous Cape Proteaceae
… is investigated for the possibility of crypsis in a post fire environment. Results were inconclusive, possibly due to a missed opportunity, but do not exclude the possibility of crypsis. Seed predation by birds may be an as yet undescribed and significant phenomenon. Seed morphology and …
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The Ontogeny of Escape Responses and Locomotor Performance in Sceloporus Woodi
… species risk detection by movement. Other than crypsis, prey species also use secondary defenses when detected by a predator. The most common secondary defense is flight. Flight initiation distance describes the distance between a prey item and a predator where the benefits of fleeing outweigh …
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The role of preen oil and body odour in birds
… roles of preen oil, notably olfactory crypsis against predators and olfactory intraspecific communication, including mate choice and parent-offspring recognition. To do so, I first investigated what information (e.g. season, sex) is encoded in avian olfactory cues by analysing the …
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A mechanistic approach to understanding the colour polymorphism in black sparrowhawks (Accipiter melanoleucus)
… conditions. This is hypothesized to be due to a crypsis advantage for the morphs under these conditions. During the winter breeding period, the predominating low light conditions on the Cape Peninsula (Western Cape, South Africa) could create an advantage for dark morphs, which should result in …
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No universal support for solar glare as an evolutionary driver of malar stripes in falcons
… in falcons for a different purpose (such as crypsis or social signaling), but may have become exapted for solar glare reduction in Peregrine Falcons owing to the species' cosmopolitan distribution and high degree of specialization on agile bird prey.
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The function of passive debris cloaking in tiny beetles (Coleoptera: Zopheridae)
… taxa globally. It is suspected to be a form of crypsis, but there is very little evidence supporting this. Here, I used beetles of the family Zopheridae as a model to assess the function of passive debris cloaking. Zopheridae are global in distribution, but unusually diverse in Aotearoa New …
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Geographical and temporal variation of biochemical and colour-pattern polymorphisms in the European moth, Noctua pronuba (L.).
… large. Previous authors have considered that as crypsis is an adaptive trait, variation in the colour and pattern of a cryptic species must also be adaptive, and maintained by selection. This is not necessarily true, and there may be a number of colour patterns that are equally cryptic in the …
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Exploring the maintenance of plumage polymorphism in the Black Sparrowhawk
… conspicuous signals and natural selection for crypsis. Colour polymorphic species have frequently been used to explore the evolutionary processes that lead to colour variation in species. Geographic variation in colour morph ratios also occurs frequently in polymorphic species and is often …
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The effects of population size on agathosma collina (rutaceae) and its conservation implications
… of predator satiation (large populations) and crypsis (small populations). Seed set per capsule varied from mostly one seed per capsule in small and medium populations to two seeds per capsule in large populations in 1988. However, 1989 data showed an almost identical spread in the numbers of …
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Coloration, Camouflage, and Sexual Dichromatism in the Northern Pacific Rattlesnake (Crotalus oreganus)
In some viperid snakes, natural selection has shaped coloration and patterning to match local habitats, and for males to show greater warning coloration than females due to a less sedentary lifestyle. The Northern Pacific Rattlesnake (<em>Crotalus oreganus) </em>is likely the most abundant ambush …