ECOLOGICAL CHARACTERISATION OF STREAMS IN TUSCANY (ITALY) FOR THE MANAGEMENT OF THE THREATENED CRAYFISH AUSTROPOTAMOBIUS PALLIPES COMPLEXB. RENAI, S. BERTOCCHI, S. BRUSCONI, F. GHERARDI, F. GRANDJEAN, M. LEBBORONI, B. PARINET, C. SOUTY GROSSET and M. C. TROUILHEBull. Fr. Pêche Piscic., 380-381 (2006) 1095-1114DOI: https://doi.org/10.1051/kmae:2006013