Early-life behaviour predicts first-year survival in a long-distance avian migrant

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2021
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Rotics, Shay
Turjeman, Sondra
Kaatz, Michael
Zurell, Damaris
Sapir, Nir
Eggers, Ute
Resheff, Yehezkel S
Jeltsch, Florian
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Proceedings of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2021, 288(1942), 20202670. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2020.2670
Zusammenfassung

Early-life conditions have critical, long-lasting effects on the fate of individuals, yet early-life activity has rarely been linked to subsequent survival of animals in the wild. Using high-resolution GPS and body-acceleration data of 93 juvenile white storks (Ciconia ciconia), we examined the links between behaviour during both pre-fledging and post-fledging (fledging-to-migration) periods and subsequent first-year survival. Juvenile daily activity (based on overall dynamic body acceleration) showed repeatable between-individual variation, the juveniles' pre- and post-fledging activity levels were correlated and both were positively associated with subsequent survival. Daily activity increased gradually throughout the post-fledging period, and the relationship between post-fledging activity and survival was stronger in individuals who increased their daily activity level faster (an interaction effect). We suggest that high activity profiles signified individuals with increased pre-migratory experience, higher individual quality and perhaps more proactive personality, which could underlie their superior survival rates. The duration of individuals' fledging-to-migration periods had a hump-shaped relationship with survival: higher survival was associated with intermediate rather than short or long durations. Short durations reflect lower pre-migratory experience, whereas very long ones were associated with slower increases in daily activity level which possibly reflects slow behavioural development. In accordance with previous studies, heavier nestlings and those that hatched and migrated earlier had increased survival. Using extensive tracking data, our study exposed new links between early-life attributes and survival, suggesting that early activity profiles in migrating birds can explain variation in first-year survival.

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570 Biowissenschaften, Biologie
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ISO 690ROTICS, Shay, Sondra TURJEMAN, Michael KAATZ, Damaris ZURELL, Martin WIKELSKI, Nir SAPIR, Wolfgang FIEDLER, Ute EGGERS, Yehezkel S RESHEFF, Florian JELTSCH, Ran NATHAN, 2021. Early-life behaviour predicts first-year survival in a long-distance avian migrant. In: Proceedings of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2021, 288(1942), 20202670. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2020.2670
BibTex
@article{Rotics2021-01-13Early-52496,
  year={2021},
  doi={10.1098/rspb.2020.2670},
  title={Early-life behaviour predicts first-year survival in a long-distance avian migrant},
  number={1942},
  volume={288},
  issn={0962-8452},
  journal={Proceedings of the Royal Society of London, Series B : Biological Sciences},
  author={Rotics, Shay and Turjeman, Sondra and Kaatz, Michael and Zurell, Damaris and Wikelski, Martin and Sapir, Nir and Fiedler, Wolfgang and Eggers, Ute and Resheff, Yehezkel S and Jeltsch, Florian and Nathan, Ran},
  note={Article Number: 20202670}
}
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