Data for: High site-fidelity and low mortality of juvenile Atlantic cod (Gadus morhua) in subarctic coastal Newfoundland during their first winter

We evaluated size-structured overwinter mortality and movement using mark-recapture and condition metrics by marking 226 cod in two batches one week apart, in October 2016. We estimated fall and overwinter mortality, and documented movement of fish recaptured in May 2017 using Cormack-Jolly-Seber models.

We applied fluorochrome markers – calcein (Sigma-Aldrich: C0875-25G) or alizarin red S (Sigma-Aldrich: A5533-25G) – to batch mark otoliths (Schmitt, 1982; Vigliola, 1997). A subsample of 60 otoliths from May 2017 recaptures was used for trace element analysis using secondary ion mass spectrometry (SIMS). See the ReadMe file for more information on the method of data collection.