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Threat recognition and response in an avian brood-parasite host from New Caledonia

Current Zoology 2021年第3期67卷 255-262页

作者： alfredo Attisaino Kasper Hlebowicz Roman Gula Jorn Theuerkauf Museum and Institute of Zoology Polish Academy of SciencesWarsawPoland Conservation Research New Caledonia La FoaNew Caledonia

Nest predation and avian brood parasitism are the main sources of nest failure in many passerine *** predators threaten both brood and parents,whereas brood parasites pose only a danger to eggs or *** fan-tailed gerygone Gerygone flavolateralis from New Caledonia is subjected to high rates of nest predation by the New Caledonian crow Corvus moneduloides(responsible for about 20-40%of predation)and moderate rates of brood parasitism by the shining bronze-cuckoo Chalcites lucidus(parasitizing about 18%of nests),which also depredates nests that are too advanced for parasitism(13%of nests).To test if fan-tailed gerygones are able to discriminate predators from brood parasites,we presented 3 bird models at active gerygone nests:a brood parasite/small nest predator(shining bronze-cuckoo),a large nest predator(crow),and a small non-native bird(common chaffinch Fringilla coelebs),which is unknown to the gerygone,as a *** assessed the response of adult gerygones to the presentation of each model by measuring the minimum approach distance,number of alarm calls,number of attacks,and time to first nest visit after the presentation(latency).Adult gerygones often attacked the cuckoo,approached but never attacked the chaffinch and always avoided the *** was shorter after an attack response and during brooding,but similar among *** did not find any link between the cuckoo model presentation and later ejection of cuckoo *** conclude that adult fan-tailed gerygones discriminate between different models and respond accordingly to the level of threat but do not show awareness of parasitism risk and increase of nestling ejection rates following exposure to the cuckoo model.

关键词： brood parasitism enemy recognition frontline defense mobbing nest defense nest predation

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Discrimination and ejection of eggs and nestlings by the fan-tailed gerygone from New Caledonia

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Current Zoology 2021年第6期67卷 653-663页

作者： alfredo attisano Nozomu J.SATO Keita D.TANAKA Yuji OKAHISA Keisuke UEDA Roman GULA Jörn THEUERKAUF Museum and Institute of Zoology Polish Academy of SciencesWarsawPoland Japan Bird Research Association TokyoJapan Department of Life Sciences Rikkyo UniversityTokyoJapan

Nestling rejection is a rare type of host defense against brood parasitism compared with egg ***,host defenses at both egg and nestling stages could be based on similar underlying discrimination mechanisms but,due to the rarity of nestling rejector hosts,few studies have actually tested this *** investigated egg and nestling discrimination by the fan-tailed gerygone Gerygone flavolateralis,a host that seemingly accepts nonmimetic eggs of its parasite,the shining bronze-cuckoo Chalcites lucidus,but ejects mimetic parasite *** introduced artificial eggs or nestlings and foreign gerygone nestlings in gerygone nests and compared begging calls of parasite and host *** found that the gerygone ejected artificial eggs only if their size was smaller than the parasite or host *** of artificial nestlings did not depend on whether their color matched that of the *** frequency of ejection increased during the course of the breeding season mirroring the increase in ejection frequency of parasite nestlings by the ***-fostered gerygone nestlings were frequently ejected when lacking natal down and when introduced in the nest before hatching of the foster brood,but only occasionally when they did not match the color of the foster *** calls differed significantly between parasite and host nestlings throughout the nestling *** results suggest that the fan-tailed gerygone accepts eggs within the size range of gerygone and cuckoo eggs and that nestling discrimination is based on auditory and visual cues other than skin *** highlights the importance of using a combined approach to study discrimination mechanisms of hosts.

关键词： begging calls brood parasitism co-evolutionary arms race egg discrimination nestling discrimination nestling polymorphism

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Erratum to:Discrimination and ejection of eggs and nestlings by the fan-tailed gerygone from New Caledonia

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Current Zoology 2021年第6期67卷 695-695页

When the pdf version of this paper first published,there were a number of errors in the reference list:accented letters were displaying incorrectly,leading to errors in author names throughout the *** has now been cor... 详细信息

关键词： online letters throughout

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