FIRST RESULTS ABOUT TOPOISOMERASE ACTIVITY IN ASTACUS ASTACUS AND AUSTROPOTAMOBIUS PALLIPES AS A BIOMARKER FOR CRAYFISH VIABILITYM. PAOLUCCI, C. DI CRISTO, C. LIBERATO and A. DI COSMOBull. Fr. Pêche Piscic., 372-373 (2004) 401-408DOI: https://doi.org/10.1051/kmae:2004013