TY - JOUR T1 - Birds and fish as bioindicators of tourist disturbance in springs in semi-arid regions in Mexico: a basis for management AU - Palacio-Nuñez, J. AU - Verdú, J. R. AU - Galante, E. AU - Jiménez-García, D. AU - Olmos-Oropeza, G. PY - 2007 VL - 30 IS - 1 JF - Animal Biodiversity and Conservation