We observed 75 Aberdeen Angus calves born in the years 2004–2007 and managed on pastures and wild areas of Karsibór, an island located in the northern part of the Szczecin Lagoon. An analysis was carried out on the results of maternal nursing of the calves in relation to subsequent calving, sex of the calf, and year of rearing. A significant (P≤0.01, P≤0.05) effect of subsequent calving on body weight of the calves being born was observed. The calves from the first calvings had significantly lower body weight at birth as compared to those born from the subsequent calving. On the other hand, there were no significant effects of the subsequent calving on body weight and daily weight gain of calves after weaning, even though the calves from the first calving were characterized by poorer performance in this respect. Significant differences between the data on calf nursing performance recorded in each individual year of the study result from the fact that the animals grazed on poorer quality pastures and unused land.

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