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Article
Monika Zielinska, Auteur ; Piotr Zieliński, Auteur ; Pawel Kolodziejczyk, Auteur ; Pawel Szewczyk, Auteur ; Jacek Betleja, AuteurSince 1981, when the first breeding pair of Mediterranean Gull Larus melanocephalus was recorded in Poland, the population of this gull has increased considerably. Its population size was stable until 1997, not exceeding ten pairs annually; ther[...]
Article
Monika Zielinska, Auteur ; Anna Dubiec, Auteur ; Piotr Zieliński, AuteurSex ratio at conception may be under selection pressure, given that male and female offspring differ in the cost of production or generate different fitness returns under specific conditions. We studied adjustments in the primary, secondary and [...]
