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Antiparasitic defenses in hosts of South American cowbirds
(China Ornithological Society, 2013-06)
The cowbirds (Molothrus, Icteridae) are a monophyletic group that includes five extant brood-parasitic species. The Screaming (M. rufoaxillaris), Giant (M. oryzivorus) and Shiny (M. bonariensis) cowbirds range mostly in ...
A novel method of rejection of brood parasitic eggs reduces parasitism intensity in a cowbird host
(The Royal Society, 2013-03)
The hosts of brood parasitic birds are under strong selection pressure to recognize and remove foreign eggs from their nests, but parasite eggs may be too large to be grasped whole and too strong to be readily pierced by ...
Coevolutionary arms race between a specialist brood parasite, the Screaming Cowbird, and its host, the Grayish Baywing
(Springer, 2019-10)
Interspecific brood parasites exploit the parental care of host species. This exploitation entails fitness costs for the hosts, which favor the evolution of antiparasitic defenses. Host defenses select for counter-defenses ...
Brown-and-yellow marshbirds reduce their acceptance threshold of mimetic brood parasite eggs in the presence of non-mimetic eggs
(Springer Tokyo, 2016-01)
The recognition and subsequent rejection of brood parasite eggs is one of the most commonly observed defensive behaviors of the host. The brown-and-yellow marshbird (Pseudoleistes virescens) is a common host of the shiny ...
Red-crested Cardinals use color and width as cues to reject Shiny Cowbird eggs
(American Ornithologists' Union, 2016-04)
Como parte del proceso coevolutivo entre los parásitos de cría y sus hospedadores, estos últimos han desarrollado diferentes estrategias para discriminar y rechazar los huevos parásitos. Este proceso de reconocimiento y ...
Can nest predation explain the lack of defenses against cowbird brood parasitism in the Rufous-collared sparrow (Zonotrichia capensis)?¿Puede la depredación de nidos explicar la falta de defensas de Zonotrichia capensis contra el parasitismo de cría de M. Bonariensis?
(American Ornithologists' Union, 2013-07)
Although interspecific avian brood parasitism usually lowers host productivity, some species lack any defense against parasites. We analyzed the effect of parasite egg removal or nest desertion following a parasitism event ...
Caspase-8 activity is part of the BeWo trophoblast cell defense mechanisms against Trypanosoma cruzi infection
(Academic Press-Elsevier, 2016)
Congenital Chagas disease is caused by the protozoan parasite Trypanosoma cruzi that must cross the placental barrier during transmission. The trophoblast constitutes the first tissue in contact with the maternal-blood ...
Trypanocidal activity of tioamide-sustituted imidazoisoquinolinones: Electrochemical properties and biological effects
(Hindawi Publishing Corporation, 2013-07)
Three thioamide-substituted imidazoisoquinolinones, which possess an heterocyclic center similar to tryptanthrin and are named C1, C2 and C3, were studied regarding: a) its in vitro anti-Trypanosoma cruzi activity, b) ...