SomiteExplorerR | Datasets used to infer individual somite period and length using systematic measurements of the whole embryo segmented region.

<strong>Data description </strong>| Chick Embryo Segmented Region Length Measurements. <strong>Brief methodology description</strong> | Length measurements were performed in frames from live imaging taken at 3 minute intervals, using Axiovision Se64 Rel 4.9.1 (Carl Zeiss) or Zen 2.5 (blue edition, Carl Zeiss). In each frame, measurements were taken from the anterior border of the first somite until the last completely formed cleft. A somitic cleft was considered completely formed only when it was clearly visible from its axial to lateral limits. We conducted a total of 2836 measurements, corresponding to 13 different chicken embryos, in stages HH7 to HH10 (corresponding to somites 1 to 10), and HH11+ to HH13+ (corresponding to somites 14 to 20). To minimize measurement biases, at least two different operators performed independent measurements. <strong>Data analysis R Package</strong> | These data are analysed using the R package: <em>SomiteExplorerR</em> deposited in GitHub (https://github.com/iduarte/SomiteExplorerR). <strong>Citation</strong> | These data are discussed in the scientific paper: Ana Cristina Maia-Fernandes, Ana Martins-Jesus, Tomás Pais-de-Azevedo, Ramiro Magno, Isabel Duarte, Raquel P. Andrade.<em> </em><em>Spatio-Temporal Dynamics of Early Somite Segmentation in the Chicken Embryo.</em><em> </em>2023. (DOI: To be added after publication). <br>