Interested in research in Hornsund? Please, visit the website of POLar Ecology Group


SHO_LIAK_phenology_productivity.xlsx contains all the information on little auk phenology, collected in Hornsund since 2001 (though not all the seasons are available). Records like hatching/fledging success etc, are very much adequate for the nest in given season but not for calculation of the parameter for the population (data can be biased due to irregular controls of some nests)!! For this purpose filter data using separate code/tips (meta_pheno_filtering.R).

While working with the data, please notify KWJ if you find an error in data and/or your output looks suspicious.


Var Description
Nest nest ID
Nest_status active/not active in the season
Hatch_succ hatching success: 1, hatching failure: 0
Fledge_succ fledging success: 1, fledging failure: 0
Lay_day julian day for egg-laying
Lay_date date for egg-laying
Lay_acc accuracy of the egg-laying day/date estimation - difference in days between the last 0 and first egg record in the nest
Hatch_day julian day for hatching
Hatch_date date for hatching
Hatch_day_cat nest estimate: if hatching day estblished based on regular control of the focal nest, otherwise: median (if appropriate) or NA
Hatch_acc accuracy of the hatching day/date estimation - difference in days between the last egg and first chick seen in the nest
Fledge_day julian day for fleding
Fledge_date date for fleding
Fledge_acc accuracy of the fleding day/date estimation - difference in days between the last chick and first empty (after chick being 21 day of life) nest seen in the nest
Mx_brood_day julian day of the last brood (E|C) record
Mx_brood_date date of the last brood (E|C) record
Min_chick_day julian day of the first chick record (for some it will be hatching day)
Min_chick_date date of the first chick record (for some it will be hatching date)
N_chick_checks N nest controls with chick
N_egg_checks N nest controls with egg
Season year of the study
Comments various non-standard info