Mean (± standard deviation) centroid size (log) and its respective statistical results.

In this table we included only the bycatch birds that were equally assigned to the same species by at least three of criteria presented in table 2 (ntotal = 103). For the 10 Yelkouan Shearwater breeding in Hyères Islands (France) we did not have geometric morphometric data and so they were not included in this table. All statistical significant results are marked in bold. Balearic shearwater showed significantly greater values of centroid size (i.e. bill size independent of bill shape) than Yellkouan shearwaters.Mean (± standard deviation) centroid size (log) and its respective statistical results.