XVII Congress SECEM (Spanish Society for the Conservation and Study of Mammals, Évora, PORTUGAL) – Scented rivers: foreign intrusion and human disturbance shape otter marking & activity. González-Bernardo E., Delgado M.M., Benjumea R., de la Riva I., Russo L.F., Delibes M., Zarzo-Arias A., Penteriani V. (1)