<b>Bryce, Trevor:</b>
                  <i>The World of the Neo-Hittite Kingdoms.</i> A Political and Military History. Oxford: Oxford University Press 2012.

Payne, Annick

doi:10.1515/olzg-2017-0009

Cited by 7 publications

(12 citation statements)

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“…Soler et al [ 2 ] raised further concerns on the suggested defensive effect of the malodourous secretions of great spotted cuckoo chicks on host chicks. They asserted that this secretion should be conservatively considered a self-protection mechanism, given that species like the common cuckoo, which is raised alone in the host nests, [ 5 , 11 ] as well as some other non parasitic cuckoo species [ 12 ] show similar chemical adaptations. We fully agree.…”

Section: Self or Brood Protection?mentioning

confidence: 99%

Formal comment to Soler et al.: Great spotted cuckoo nestlings have no antipredatory effect on magpie or carrion crow host nests in southern Spain

et al. 2017

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Section: Self or Brood Protection?mentioning

confidence: 99%

Formal comment to Soler et al.: Great spotted cuckoo nestlings have no antipredatory effect on magpie or carrion crow host nests in southern Spain

et al. 2017

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“…Here, I test whether host defences against brood parasitism differ according to sex differences in adult diederik cuckoo ( Chrysococcyx caprius ) appearance using a model presentation experiment at the nests of free‐living hosts. Diederik cuckoos are sexually dimorphic in plumage and facial colouration, with females presenting a more cryptic adult phenotype than conspicuous males, while both sexes are similar in size (Figure 1 ; Krüger et al., 2007 ; Payne, 1967 , 2005 ; Reed, 1968 ; Rowan, 1983 ). They are obligate, host‐evicting brood parasites with host species including the Ploceidae (the weaverbirds; Payne, 2005 ; Rowan, 1983 ).…”

Section: Introductionmentioning

confidence: 99%

Costly conspicuousness reveals benefits of sexual dimorphism in brood parasitic diederik cuckoos

York

2024

Ecology and Evolution

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The existence of adult sexual dimorphism is typically explained as a consequence of sexual selection, yet coevolutionary drivers of sexual dimorphism frequently remain untested. Here, I investigate the role of sexual dimorphism in host–parasite interactions of the brood parasitic diederik cuckoo, Chrysococcyx caprius. Female diederik cuckoos are more cryptic in appearance and pose a threat to the clutch, while male diederik cuckoos are conspicuous and not a direct threat. Specifically, I examine whether sexual dimorphism in diederik cuckoos provokes threat‐level sensitive responses in Southern red bishop, Euplectes orix, hosts. I use experimentally simulated nest intrusions to test whether hosts have the capacity to differentially (i) detect, and/or (ii) discriminate between, male and female diederik cuckoos, relative to harmless controls. Overall, I found no evidence that diederik cuckoos differ in detectability, since both sexes are comparable to controls in the probability and speed of host detection. Furthermore, neither male nor female hosts discriminate between sexually dimorphic diederik cuckoos when engaging in frontline nest defences. However, hosts that witnessed a male diederik cuckoo during the trial were more likely to reject odd eggs. Moreover, experimental eggs were significantly more likely to be rejected when female bishops observed a male compared to a female diederik cuckoo. While the cryptic appearance of female diederik cuckoos does not reduce detection by hosts, it does provide the benefit of anonymity given the egg rejection costs of conspicuous male‐like appearance in the nest vicinity. These findings have implications for the evolution and maintenance of sexual dimorphism across the Cuculidae, and highlight the value of testing assumptions about the ecological drivers of sexual dimorphism.

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“…Avian brood parasites lay eggs in the nests of other birds and leave the young to the care of their hosts [ 1 ]. The fitness cost of brood parasitism can be high, thus hosts are under selection to evolve defences against parasitism [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus

et al. 2018

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Extra-pair copulation can increase genetic diversity and offspring fitness. However, it may also increase intra-nest variability in avian hosts of brood parasites, which can decrease the discrimination ability of host parents towards the parasite. In New Caledonia, the Fan-tailed Gerygone (Gerygone flavolateralis), which is parasitized by the Shining Bronze-cuckoo (Chalcites lucidus), has two nestling morphs, dark and bright, that can occur in monomorphic and polymorphic broods. Gerygone parents recognize and eject parasite nestlings from their nest, but the presence of polymorphic broods may increase the chances of recognition errors. Using 17 microsatellite markers, we investigated the mating system of the Fan-tailed Gerygone to understand the mechanisms underlying nestling polymorphism. We hypothesised that extra-pair copulations would lead to a higher proportion of polymorphic broods caused by higher genetic variability, thus creating a trade-off between genetic benefits and host defence reliability. Extra-pair paternity occurred in 6 of 36 broods, which resulted in 6 of 69 offspring sired by extra-pair males. Broods with and without mixed paternity were comparably often parasitized. Extra-pair paternity did not influence the proportions of bright, dark and polymorphic broods. Compared to bright siblings in polymorphic broods, dark nestlings tended to have lower heterozygosity, particularly in loci associated with skin coloration. The results also suggested that there is no obstacle for genetic exchange between individuals from forest and savannah, possibly due to dispersal of offspring. We conclude that the Fan-tailed Gerygone is a socially monogamous species with a low rate of extra-pair paternity compared to closely related species. Extra-pair paternity increased offspring genetic variability without measurable associated costs by brood parasitism. The results highlight the importance of studying host mating systems to assess the trade-offs between host defence and offspring fitness in co-evolutionary arms races.

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Bryce, Trevor: The World of the Neo-Hittite Kingdoms. A Political and Military History. Oxford: Oxford University Press 2012.

Cited by 7 publications

References 0 publications

Formal comment to Soler et al.: Great spotted cuckoo nestlings have no antipredatory effect on magpie or carrion crow host nests in southern Spain

Formal comment to Soler et al.: Great spotted cuckoo nestlings have no antipredatory effect on magpie or carrion crow host nests in southern Spain

Costly conspicuousness reveals benefits of sexual dimorphism in brood parasitic diederik cuckoos

Mating system and extra-pair paternity in the Fan-tailed Gerygone Gerygone flavolateralis in relation to parasitism by the Shining Bronze-cuckoo Chalcites lucidus

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