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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
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2.

001-es BibID:BIBFORM028106
Első szerző:Moskát Csaba
Cím:Discordancy or template-based recognition? : Dissecting the cognitive basis of the rejection of foreign eggs in hosts of avian brood parasites / Csaba Moskát, Miklós Bán, Tamás Székely, Jan Komdeur, Rim W. G. Lucassen, Lotte A. van Boheemen, Márk E. Hauber
Dátum:2010
ISSN:0022-0949
Megjegyzések:Many avian hosts have evolved antiparasite defence mechanisms, including egg rejection, to reduce the costs of brood parasitism. The two main alternative cognitive mechanisms of egg discrimination are thought to be based on the perceived discordancy of eggs in a clutch or the use of recognition templates by hosts. Our experiments reveal that the great reed warbler (Acrocephalus arundinaceus), a host of the common cuckoo (Cuculus canorus), relies on both mechanisms. In support of the discordancy mechanism, hosts rejected their own eggs (13%) and manipulated ('parasitic') eggs (27%) above control levels in experiments when manipulated eggs were in the majority but when clutches also included a minority of own eggs. Hosts that had the chance to observe the manipulated eggs daily just after laying did not show stronger rejection of manipulated eggs than when the eggs were manipulated at clutch completion. When clutches contained only manipulated eggs, in 33% of the nests hosts showed rejection, also supporting a mechanism of template-based egg discrimination. Rejection using a recognition template might be more advantageous because discordancy-based egg discrimination is increasingly error prone with higher rates of multiple parasitism.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal Of Experimental Biology. - 213 : 11 (2010), p. 1976-1983. -
További szerzők:Bán Miklós (1975-) (biológus) Székely Tamás (1959-) (biológus) Komdeur, Jan Lucassen, Rim W. G. Boheemen, Lotte A. van Hauber, Mark E.
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3.

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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