DISTRIBUTION OF INDIGENOUS AND NON-INDIGENOUS CRAYFISH POPULATIONS IN THE POITOU-CHARENTES REGION (FRANCE): EVOLUTION OVER THE PAST 25 YEARSM. BRAMARD, A. DEMERS, M.-C. TROUILHE, E. BACHELIER, J.-C. DUMAS, C. FOURNIER, E. BROUSSARD, O. ROBIN, C. SOUTY-GROSSET and F. GRANDJEANBull. Fr. Pêche Piscic., 380-381 (2006) 857-866DOI: https://doi.org/10.1051/kmae:2006027