Breeding Success Affects the Apparent Survival of Grassland Passerines

Shitikov, Dmitry; Vaytina, Tatiana; Makarova, Tatiana V.; Fedotova, Svetlana; Krasnykh, N. A.; Yurchenko, Yulia A.

doi:10.1134/s1062359017090138

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…We found that 36% of adult yellow‐throated buntings are returning to their territories in the following year. This apparent survival rate is similar or slightly lower compared with other migratory species of comparable size (15–20 g body weight) from temperate latitudes, for example, Spotted Flycatcher Muscicapa striata (49%, Siriwardena et al, 1998), Common Redstart Phoenicurus phoenicurus (49%, Haukioja, 1969), Whinchat Saxicola rubetra (27%, Shitikov et al, 2017), Yellow Wagtail Motacilla flava (39%, Shitikov et al, 2017) and Black‐faced Bunting (48%, McClure, 1974). Our survival estimates could be used in a modeling study to understand the effects of potential threats on the population development of this species, as has been done for the closely related Yellow‐breasted Bunting Emberiza aureola (Kamp et al, 2015).…”

Section: Discussionmentioning

confidence: 66%

Habitat use, survival, and migration of a little‐known East Asian endemic, the yellow‐throated bunting Emberiza elegans

Heim

Antonov

Kunz

et al. 2023

Ecology and Evolution

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Basic information on the ecology of species is key for their conservation. Here we study the ecology of the little‐known yellow‐throated bunting Emberiza elegans based on a multi‐year study on its breeding grounds in the Russian Far East. For the first time in this species, we quantified breeding habitat parameters, calculated sex‐specific apparent survival, and determined individual nonbreeding locations using light‐level geolocation. We found that the habitat around song posts of male yellow‐throated buntings is characterized by tree and shrub layers on richly littered moist ground. Habitat use overlaps with co‐occurring Tristram's Buntings Emberiza tristrami and Black‐faced Buntings E. spodocephala , but territories differ especially in tree cover and litter cover. Based on 4 years of color‐ringing data of 72 individuals, we calculated an apparent survival rate of 36%, with higher survival estimates for male than for female yellow‐throated buntings. We found no effect of carrying a geolocator on survival. We retrieved six geolocators from males. All birds migrated south‐westward during autumn and spent the nonbreeding season at locations in China 700–1700 km away from their breeding sites. At least two individuals spent the boreal winter outside of the known range in northern or central China. Birds left the breeding area between early October and early November and returned between mid‐March and mid‐April. Our data on habitat use, survival rate, and migratory connectivity will help to assess threats to the populations of this enigmatic species, which might include habitat loss due to forest fires on the breeding grounds, and unsustainable harvest for consumption during the nonbreeding season.

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Section: Discussionmentioning

confidence: 66%

Habitat use, survival, and migration of a little‐known East Asian endemic, the yellow‐throated bunting Emberiza elegans

Heim

Antonov

Kunz

et al. 2023

Ecology and Evolution

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“…Additionally, environmental variables ( Clark et al, 2018 ) or an individual's reproductive success may better predict return rates than baseline CORT: the positive (albeit non-significant) effect of fledgling number on maternal return rates that we detected suggests that females with higher reproductive success are more likely to return to a certain area to breed ( Bonier et al, 2009b ). Thus, CORT may affect return rates and survival indirectly, by affecting fledging success ( Shitikov et al, 2017 ; Weegman et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Maternal glucocorticoid levels during incubation predict breeding success, but not reproductive investment, in a free-ranging bird

et al. 2020

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The hormone corticosterone (CORT) has been hypothesized to be linked with fitness, but the directionality of the relationship is unclear. The ‘CORT-fitness hypothesis’ proposes that high levels of CORT arise from challenging environmental conditions, resulting in lower reproductive success (a negative relationship). In contrast, the CORT-adaptation hypothesis suggests that, during energetically demanding periods, CORT will mediate physiological or behavioral changes that result in increased reproductive investment and success (a positive relationship). During two breeding seasons, we experimentally manipulated circulating CORT levels in female tree swallows (Tachycineta bicolor) prior to egg laying, and measured subsequent reproductive effort, breeding success, and maternal survival. When females were recaptured during egg incubation and again during the nestling stage, the CORT levels were similar among individuals in each treatment group, and maternal treatment had no effect on indices of fitness. By considering variation among females, we found support for the CORT-adaptation hypothesis; there was a significant positive relationship between CORT levels during incubation and hatching and fledging success. During the nestling stage CORT levels were unrelated to any measure of investment or success. Within the environmental context of our study, relationships between maternal glucocorticoid levels and indices of fitness vary across reproductive stages.

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A hidden threat in abandoned fields: frequent nest predation by common adder on ground-nesting passerines

et al. 2022

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Breeding Success Affects the Apparent Survival of Grassland Passerines

Cited by 7 publications

References 37 publications

Habitat use, survival, and migration of a little‐known East Asian endemic, the yellow‐throated bunting Emberiza elegans

Habitat use, survival, and migration of a little‐known East Asian endemic, the yellow‐throated bunting Emberiza elegans

Maternal glucocorticoid levels during incubation predict breeding success, but not reproductive investment, in a free-ranging bird

A hidden threat in abandoned fields: frequent nest predation by common adder on ground-nesting passerines

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