منابع مشابه
A quantitative trait locus for recognition of foreign eggs in the host of a brood parasite.
Avian brood parasites reduce the reproductive output of their hosts and thereby select for defence mechanisms such as ejection of parasitic eggs. Such defence mechanisms simultaneously select for counter-defences in brood parasites, causing a coevolutionary arms race. Although coevolutionary models assume that defences and counter-defences are genetically influenced, this has never been demonst...
متن کاملSmartphone Microscopy of Parasite Eggs Accumulated into a Single Field of View
A Nokia Lumia 1020 cellular phone (Microsoft Corp., Auckland, New Zealand) was configured to image the ova of Ascaris lumbricoides converged into a single field of view but on different focal planes. The phone was programmed to acquire images at different distances and, using public domain computer software, composite images were created that brought all the eggs into sharp focus. This proof of...
متن کاملEgg-laying Behavior in Screaming Cowbirds: Why Does a Specialist Brood Parasite Waste so Many Eggs?
Obligate brood parasites should synchronize parasitism with host laying to maximize egg hatchability and chick survival. While the generalist Shiny (Molothrus bonariensis), Brown-headed (M. ater), and Bronzed (M. aeneus) Cowbirds frequently synchronize parasitism with host laying, specialist Screaming Cowbirds (M. rufoaxillaris) very often fail to do so in nests of their main host, the Bay-wing...
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 کاملBrood parasite eggs enhance egg survivorship in a multiply parasitized host.
Despite the costs to avian parents of rearing brood parasitic offspring, many species do not reject foreign eggs from their nests. We show that where multiple parasitism occurs, rejection itself can be costly, by increasing the risk of host egg loss during subsequent parasite attacks. Chalk-browed mockingbirds (Mimus saturninus) are heavily parasitized by shiny cowbirds (Molothrus bonariensis),...
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ژورنال
عنوان ژورنال: The Canadian Entomologist
سال: 1897
ISSN: 0008-347X,1918-3240
DOI: 10.4039/ent2925b-2