A brood parasite selects for its own egg traits
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چکیده
منابع مشابه
A brood parasite selects for its own egg traits
Many brood parasitic birds lay eggs that mimic their hosts' eggs in appearance. This typically arises from selection from discriminating hosts that reject eggs which differ from their own. However, selection on parasitic eggs may also arise from parasites themselves, because it should pay a laying parasitic female to detect and destroy another parasitic egg previously laid in the same host nest...
متن کاملHow to evade a coevolving brood parasite: egg discrimination versus egg variability as host defences
Arms races between avian brood parasites and their hosts often result in parasitic mimicry of host eggs, to evade rejection. Once egg mimicry has evolved, host defences could escalate in two ways: (i) hosts could improve their level of egg discrimination; and (ii) negative frequency-dependent selection could generate increased variation in egg appearance (polymorphism) among individuals. Profic...
متن کاملContext-dependent response to eggs: egg retrieval versus egg rejection in a conspecific brood parasite
http://dx.doi.org/10.1016/j.anbehav.2017.08.022 0003-3472/© 2017 The Association for the Study of A Birds often need to distinguish their own eggs from those of others or from other objects that could be confused with their eggs. Egg recognition occurs in a variety of birds that retrieve eggs displaced from the nest. Egg recognition and rejection is also a particularly widespread defence agains...
متن کاملCoevolution in Action: Disruptive Selection on Egg Colour in an Avian Brood Parasite and Its Host
BACKGROUND Trait polymorphism can evolve as a consequence of frequency-dependent selection. Coevolutionary interactions between hosts and parasites may lead to selection on both to evolve extreme phenotypes deviating from the norm, through disruptive selection. METHODOLOGY/PRINCIPAL FINDING Here, we show through detailed field studies and experimental procedures that the ashy-throated parrotb...
متن کاملBrood parasitism selects for no defence in a cuckoo host.
In coevolutionary arms races, like between cuckoos and their hosts, it is easy to understand why the host is under selection favouring anti-parasitism behaviour, such as egg rejection, which can lead to parasites evolving remarkable adaptations to 'trick' their host, such as mimetic eggs. But what about cases where the cuckoo egg is not mimetic and where the host does not act against it? Classi...
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ژورنال
عنوان ژورنال: Biology Letters
سال: 2013
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2013.0573