Enzymatic activities in spermatozoa and butyltin concentrations in Baltic turbot (Scophthalmus maximus)

► We measure activities of spermatozoal enzymes of Baltic turbot. ► We determine butyltin concentrations in males tissues. ► Enzymatic activities show a significant increase with BTs in the testes and livers. ► TBT burdens in testes potentially affect metabolism of turbot spermatozoa.