THE INFLUENCE OF WATER TEMPERATURE AND FLOW ON YEAR CLASS STRENGTH OF TWAITE SHAD (ALOSA FALLAX FALLAX) FROM THE RIVER SEVERN, ENGLAND.M. W. APRAHAMIAN and C. D. APRAHAMIANBull. Fr. Pêche Piscic., 362-363 (2001) 953-972DOI: https://doi.org/10.1051/kmae:2001030