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Like father,like son?Similarity of syllable repertoires and structures in the songs of first-year male Tree Pipits and their potential tutors 认领 引用
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作者 Hana Kahounová Niall H.K.Burton +1 位作者 Adam Petrusek Tereza Petrusková 《Avian Research》 SCIE CAS CSCD 2026年第3期668-681,共14页
Birdsong in oscine passerines is socially learned,but the relative influence of different tutors in the wild remains unclear for many species.We examined song acquisition in the Tree Pipit(Anthus trivialis:Motacillida... Birdsong in oscine passerines is socially learned,but the relative influence of different tutors in the wild remains unclear for many species.We examined song acquisition in the Tree Pipit(Anthus trivialis:Motacillidae),a migratory passerine with critical-period learning and temporally stable,individually unique syllable repertoires.Through a long-term monitoring study(2016–2025)in eastern England,we analyzed the repertoires of 413 males,including 22 ringed as nestlings and recorded later as adults.For most of these focal males,we identified three potential tutor groups:social fathers(territorial males affiliated to the focal males'nests),natal nest neighbours,and territory neighbours in the first breeding season.Repertoires of studied males were described by the presence/absence of visually classified syllable types,and structural similarity of the two most variable syllable categories was quantified using dynamic time warping.Assessment of the similarity of syllable repertoires suggested that male Tree Pipits learn from multiple local males rather than selecting one specific tutor or preferred tutor group.Repertoire composition and structural similarity of one syllable category(but not the other)indicated higher similarity of focal males'vocalization to those of natal nest neighbours than to those of randomly selected locally co-occurring males;this pattern,however,was driven only by a subset of focal males.Sons'songs were never very similar to those of their social fathers,and siblings from the same nests always developed dissimilar repertoires.Structural similarity in one complex syllable category did not predict similarity in the other,also indicating that syllables tend to be learnt from different tutors.When assembling their repertoires,young male Tree Pipits develop individually unique characteristics while reflecting local acoustic traditions.Combined with strong site fidelity of both young birds and adults,learning from various local sources likely contributes to fine-scale geographic variation in the studied species'song,detectable even within the studied region between areas separated by ca.10 km. 展开更多
关键词 Anthus trivialis Birdsong learning Dynamic time warping Geographic song variation Individual acoustic monitoring Repertoire similarity
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Local song evolution after three decades in a complex songster,the Thrush Nightingale 认领 引用
2
作者 Abel Souriau Jorma Sorjonen +1 位作者 Adam Petrusek Tereza Petrusková 《Avian Research》 SCIE CAS CSCD 2025年第1期110-118,共9页
Birdsong is an important secondary sexual trait which may vary between but also within species.Intraspecific variation is generally studied either on the geographical or on the temporal scale;most of the studies explo... Birdsong is an important secondary sexual trait which may vary between but also within species.Intraspecific variation is generally studied either on the geographical or on the temporal scale;most of the studies exploring the variation of song over time,however,focused on species with rather simple songs.In this study,we explored the temporal changes in song of a complex songster,the Thrush Nightingale(Luscinia luscinia),recorded after 33 years(in 1986 and 2019)at the same locality in south-eastern Finland.Our analysis revealed a complete turnover of song types over the study period,with no song type shared between the two recording years.In contrast,40%of the originally recorded syllable types were still found in the repertoires of recently recorded males.Their song type repertoires were significantly smaller but the songs themselves were on average longer compared to the 1986 recordings.Repertoires of both syllables and song types were more shared between males recorded in 1986 than between those from 2019.We discuss the processes that may have contributed to these temporal changes in song and call for more detailed studies of song evolution in wild populations. 展开更多
关键词 Cultural evolution Luscinia luscinia Song variation Songbirds Temporal changes Vocalisation
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Reevaluation of dialect boundaries in the Yellowhammer(Emberiza citrinella)based on citizen science data:Should we split or lump? 认领 引用
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作者 Lucie Diblíkova Pavel Pipek +2 位作者 Stanislav Vosolsobe Adam Petrusek Tereza Petruskova 《Avian Research》 SCIE CSCD 2023年第3期361-368,共8页
Dialects are a specific form of geographic variation of birdsong with relatively sharp boundaries between distinct song characteristics,which provide opportunities for focused studies of processes underlying the emerg... Dialects are a specific form of geographic variation of birdsong with relatively sharp boundaries between distinct song characteristics,which provide opportunities for focused studies of processes underlying the emergence of spatial patterns in vocalization.Several songbird species that exhibit dialects became models for such research,and for some of them large-scale datasets were assembled that included recordings provided by the public.Among them,the Yellowhammer(Emberiza citrinella,Emberizidae) is particularly prominent,as it has been recently a subject of dedicated citizen science projects focusing on its dialect distribution.The most successful,in terms of public participation as well as the number and density of obtained recordings,was the Dialects of Czech Yellowhammers(DCY) project,which assembled detailed data at the whole-country level.A mosaic of almost all common song variants known across Europe was observed in Czechia,but the results indicated that some of the traditionally recognized Yellowhammer dialects may not represent geographically clustered song variants,at least not in Central Europe.We quantitatively analysed variation(frequency and temporal characteristics and modulation) of the terminal song element in three dialects defined by arbitrary frequency thresholds in DCY.Multivariate analyses indicated that pooling these to two distinct groups reflects the variation in the songs,as well as their spatial distribution,better than retaining the current classification to three dialects or their finer splitting to even more categories.We provide simple measures that may be used for classification of these Yellowhammer song variants in Central Europe.However,we warn from indiscriminate transposing of results from one region to another,as that may lead to substantial biases.Future studies of birdsong variation will benefit from big data assembled by citizen scientists,but to maximise their usefulness for further dialect research,careful delineation of dialect boundaries is essential. 展开更多
关键词 Birdsong Geographic variation Bioacoustics Dialects Public participation
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