Environmental data for evaluation of Chinstrap Penguin foraging behaviour in Harmony Point, Nelson Island, during two years of contrasting conditions.

This dataset includes:

1 - a time series of environmental variables subsetted for the Area 48.1 (Antarctic Peninsula);

2 - Monthly averaged data on chlorophyll-a concentration CHL, photosynthetically available/active radiation PAR (NASA OB.DAAC 2018a,b), fractional sea ice cover SIC and surface wind speed SWS (GMAO 2015) for a 75km radius around Harmony Point, Nelson Island, maritime Antarctic Peninsula;

3 - Antarctic Krill (Euphausia superba) NASC (Nautical Area Scattering Coefficient, m2 nmi−2) acoustic estimated density for december/january 2019/20 and 2021/22, acoustic surveys were carried out in the research vessel boat "RS Karpuj" within the area used by penguins;

3 - Foraging trip -level summarized data from 27 chinstrap penguins tracked with Axy-trek marine loggers (40 x 20 x 8 mm, 14g, GPS logger, time depth recorder TDR and accelerometer) during late incubation and early chick-rearing, december/january 2019/20 and 2021/22;

4 - Colony-level breeding success estimated as chicks raised per nest in d2019/20 and 2021/22 breeding seasons.

Data collection was supported by Áreas Marinas Protegidas program of the Instituto Antártico Chileno (AMP 24 03 052).