Vliv variability v obranných mechanismech mimetiků na chování predátorů: quasi-batesovské mimikry

Vinšová, Johana

There are various types of defence mechanisms used by prey to escape detection by predators. However, many species use warning signals to inform predators about their unpalatability or toxicity. Some prey species closely resemble each other by sharing warning signals and gain protection from predators. This adaptation is defined as "mimicry." According to the type of defence, we distinguish between Müllerian and Batesian mimicry. Müllerian mimicry consists of mutual relationship, where two or more equally unpalatable or toxic species (co-mimics) resemble each other. Batesian mimicry is defined as protection based on imitation of unpalatable species (the model) by another species (the mimic), where the mimic lacks any form of chemical or mechanical defence. In contrast, quasi-Batesian mimics possess certain level of defence (for example, partial unpalatability or unpleasant taste) resembling another, better protected species (the model). Unlike Batesian mimicry, where the mimic is completely undefended, the quasi-Batesian mimic has its own defence mechanisms, although they are less intense than those of a model. Depending on the level of defence and frequency, quasi-Batesian mimic can positively or negatively affect survival rate or fitness of model species. Key words: mimicry, defence,...

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