Szukana fraza: [Opis = "Metabolizable energy requirement during the gestation period in the European pine vole, Pitymys subterraneus, is 18% higher thah those of non\-breeding females. During the last 6 days of gestation this increase reaches 53%. Costs of lactation and care of the young in litters of three offspring are proportionally higher than in litters of two young only."]

Wyników: 1