Dynamics of developmental stability of seals and pollution in the Baltic Sea

Abstract

Fluctuating asymmetry of skull characters, as a measure of developmental stability, was studied in two seal species: grey seal Halichoerus grypus (Fabricius, 1791), and ringed seal Pusa hispida Schreber, 1775 from the Baltic Sea. Seals were collected in three different periods of water pollution of the Baltic Sea