Simpler methods can outperform more sophisticated ones when assessing bird migration starting date

The migration starting date (MSD) of 30 Eurasian Teal and 8 Eurasian Stone-curlews was estimated by processing tracking data with four methods. A significant difference was found for Teal, with methods fitting models on Net Square Displacement postponing MSD compared to distance threshold methods. I...

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Veröffentlicht in:	Journal of ornithology 2020-07, Vol.161 (3), p.901-907
Hauptverfasser:	Cerritelli, G., Vanni, L., Baldaccini, N. E., Lenzoni, A., Sorrenti, M., Falchi, V., Luschi, P., Giunchi, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Biomedical and Life Sciences Ecology Fish & Wildlife Biology & Management Life Sciences Mathematical models Migration Short Communication Zoology
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container_title	Journal of ornithology
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creator	Cerritelli, G. Vanni, L. Baldaccini, N. E. Lenzoni, A. Sorrenti, M. Falchi, V. Luschi, P. Giunchi, D.
description	The migration starting date (MSD) of 30 Eurasian Teal and 8 Eurasian Stone-curlews was estimated by processing tracking data with four methods. A significant difference was found for Teal, with methods fitting models on Net Square Displacement postponing MSD compared to distance threshold methods. In Stone-curlews the four methods provided comparable MSD estimates. The reliability of Teal MSD was evaluated comparing the estimated ratio between time at stopover/time in flight with the ratio expected from the optimal migration theory. Threshold methods provided estimates closer to the ratio expected for time-minimizing migrants and therefore seems the most reliable approach, especially for datasets with irregular sampling and variable migratory strategies.
doi_str_mv	10.1007/s10336-020-01770-z
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subjects	Biomedical and Life Sciences Ecology Fish & Wildlife Biology & Management Life Sciences Mathematical models Migration Short Communication Zoology
title	Simpler methods can outperform more sophisticated ones when assessing bird migration starting date
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