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001-es BibID:	BIBFORM049459
Első szerző:	Bán Miklós (biológus)
Cím:	Simultaneous viewing of own and parasitic eggs is not required for egg rejection by a cuckoo host / Miklós Bán, Csaba Moskát, Zoltán Barta, Márk E. Haube
Dátum:	2013
ISSN:	1045-2249
Megjegyzések:	Many hosts have evolved diverse cognitive mechanism to recognize and reduce the cost of social parasitism. For example, great reed warblers Acrocephalus arundinaceus can accurately reject closely mimetic eggs of brood parasitic common cuckoos Cuculus canorus. Yet, these same hosts are less effective at identifying and rejecting parasitism when the clutch is parasitized by multiple cuckoo eggs, suggesting a role for discordancy (the rejection of the egg type in the minority of the clutch) and/or online self-referent phenotype matching (the simultaneous viewing of cuckoo and own egg in the nest) to reject foreign egg. We tested whether the presence of host's own eggs is required for the discrimination of foreign eggs by dyeing hosts' own eggs with one of several colors so that clutches contained (a) 1 dyed and 4 unmanipulated eggs, (b) 3 dyed and 2 unmanipulated eggs, or 5 eggs dyed either (c1) differently or (c2) similarly. Rejection rates of dyed eggs varied widely between different colors and were highest in treatment (a), with 1 dyed egg, compared with treatments with the majority (b) or all (c1 and c2) dyed eggs. However, relative rejection rates of dyed eggs were also consistent among specific colors across treatments, including (c1) and (c2), where no unmanipulated own eggs were available for viewing and irrespectiveof whether eggs were dyed all different colors (c1) or the same colors (c2). We conclude that these hosts can rely on comparisons of foreign egg colors against an internal recognition template of acceptable (own) egy phenotypes.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban brood parasitism egg recognition egg rejection multiple parasitism phenotype matching recognition template Élettudományok - Biológiai tudományok
Megjelenés:	Behavioral Ecology. - 24 : 4 (2013), p. 1014-1021. -
További szerzők:	Moskát Csaba Barta Zoltán (1967-) (biológus, zoológus) Hauber, Mark E.
Pályázati támogatás:	MTA-DE Lendület MTA Viselkedésökológiai Kutatócsoport
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001-es BibID:	BIBFORM049339
Első szerző:	Moskát Csaba
Cím:	Foreign egg retention by avian hosts in repeated brood parasitism : why do rejecters accept? / Csaba Moskát, Márk E. Hauber, Zoltán Elek, Moniek Gommers, Miklós Bán, Frank Groenewoud, Tom S. L. Versluijs, Christiaan W. A. Hoetz, Jan Komdeur
Dátum:	2013
ISSN:	0340-5443
Megjegyzések:	Great reed warblers (Acrocephalus arundinaceus) are frequently parasitized by egg-mimetic common cuckoos (Cuculus canorus) in Hungary, and these hosts reject about a third of parasitic eggs. The timing of parasitism is important, in that the probability of rejection decreases with advancing breeding stages in this host. Also, egg rejection is more common when a clutch is parasitized by a single foreign egg, compared to parasitism by multiple eggs. We repeatedly parasitized great reed warbler clutches with moderately mimetic foreign eggs, either with (1) one foreign egg (single parasitism) and, after 3 days, by all foreign eggs (multiple parasitism), or (2) all foreign eggs and, 3 days later, by only one foreign egg. Hosts ejected 26-53 % of the experimental parasitic eggs in the first stage of the repeated parasitism, but almost all eggs were accepted int he second stage, irrespective of weather the clutch was singly or multiply parasitized. Video-taping of the behavioural responses of hosts to experimental parasitism revealed no evidence for sensory constraints on foreign-egg recognition, because hosts recognized and pecked the parasitic eggs as frequently in the second stage of repeated parasitism, as they did int he first stage. We suggest that the relative timing of parasitism (laying vs. incubation stage), rather than learning to accept earlier-laid foreign eggs, results in higher acceptance rates of cuckoo eggs in repeated parasitism, because there is decreasing natural cuckoo parasitism on this host species and, hence, less need for antiparasitic defences, with the advancing stages of breeding.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban Brood parasitism Antiparasite defence repeated parasitism Egg recognition Egg rejection Egg retention Élettudományok - Biológiai tudományok
Megjelenés:	Behavioral Ecology And Sociobiology 68 : 3 (2013), p. 403-413. -
További szerzők:	Hauber, Mark E. Elek Z. Gommers, Moniek Bán Miklós (1975-) (biológus) Groenewoud, Frank Versluijs, Tom S. L. Hoetz, Christiaan W. A. Komdeur, Jan
Pályázati támogatás:	MTA-DE Lendület MTA Viselkedésökológiai Kutatócsoport
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM028107
Első szerző:	Moskát Csaba
Cím:	Post-ejection nest-desertion of common cuckoo hosts: a second defense mechanism or avoiding reduced reproductive success? / Csaba Moskát, Erik C. Rosendaal, Myra Boers, Anikó Zölei, Miklós Bán, Jan Komdeur
Dátum:	2010
ISSN:	0340-5443
Megjegyzések:	Hosts of the common cuckoo (Cuculus canorus), an avian brood parasite, develop antiparasite defense mechanisms to increase their reproductive success. Ejection of the parasite egg and desertion of the parasitized nest are the most typical adaptations in response to brood parasit- ism, but nest desertion may also occur in response to partial clutch reduction, independently from parasitism. Some great reed warblers (Acrocephalus arundinaceus) showed both mechanisms in the same incidence of cuckoo parasitism: in 18% of successful ejections of the parasite eggs, they deserted their nests. We studied if such cases of post-ejection nest-desertion are caused by brood parasitism or reduced clutch value. We experimentally parasitized clutches consisting of five or three host eggs with two painted conspecific eggs to mimic parasitic eggs, as multiple parasitism is frequent in the area. Although hosts ejected these parasitic eggs in both clutch categories (100% and 67% for the larger and smaller inital clutch sizes, respectively), we found that after manipulation, post- ejection nest-desertion frequently occurred at small (3-egg) clutches (40%), but rarely at large (5-egg) clutches (17%). The same phenomenon also occurred when unparasitized 3-egg clutches were reduced by two eggs, but not when 5-egg clutches were reduced in the same way. A logistic regression model revealed that only initial clutch size affected nest desertion of parasitized nests in our experiments. Therefore, we conclude that post-ejection nest-desertion is not a second antiparasite mechanism, which might serve as a redundant antiparasite defense, but a reaction to typically small and further decreased clutch size.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Behavioral Ecology And Sociobiology. - 65 : 5 (2010), p. 1045-1053. -
További szerzők:	Rosendaal, Erik C. Boers, Myra Zölei Anikó Bán Miklós (1975-) (biológus) Komdeur, Jan
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001-es BibID:	BIBFORM005419
Első szerző:	Moskát Csaba
Cím:	Experimental support for the use of egg uniformity in parasite egg discrimination by cuckoo hosts / Csaba Moskát, Jesús M. Avilés, Miklós Bán, Rita Hargitai, Anikó Zölei
Dátum:	2008
Megjegyzések:	Common cuckoo (Cuculus canorus) parasitism drastically reduces the reproductive success of their hosts and selects for host discrimination of cuckoo eggs. In a second stage of anti-parasite adaptation, once cuckoos can lay eggs that mimic those of their hosts, a high uniformity of host egg appearance within a clutch may favour cuckoo egg discrimination. Comparative evidence provides indirect support for this hypothesis although experimental support is currently lacking. Here, we studied the effect of experimentally decreased uniformity of host egg appearance on cuckoo egg discrimination by great reed warbler (Acrocephalus arundinaceus) hosts in a population in which long-term cuckoo parasitism has led to high levels of cuckoo?host egg mimesis. We manipulated host clutch uniformity by adding extra spots to fresh host eggs just after they were laid. Rejection of non-mimetic experimental eggs added to these nests was compared with those in control nests in which uniformity was not altered. Previously, by over-painting real spots in a control group of nests, we showed a negligible effect of our paints on hosts' perception of their eggs. We show that for the great reed warbler, non-mimetic experimental eggs were relatively more tolerated in experimental nests, i.e. with lower unifor- mity (40%) than in control nests (5%). This is the first experimental study, to our knowledge, which demonstrates a reduced discrimination of foreign eggs as a consequence of an increase of egg phenotypes variation perception in a cuckoo host.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Behavioral Ecology and Sociobiology. - 62 (2008), p. 1885-1890. -
További szerzők:	Avilés, Jesús M. Bán Miklós (1975-) (biológus) Hargitai Rita Zölei Anikó
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