| population effects of sarcoptic mange in barbary sheep (ammotragus lervia) from sierra espuña regional park, spain. | the nonindigenous barbary sheep population (ammotragus lervia) of the sierra espuna regional park (murcia, spain) suffered an outbreak of sarcoptic mange between 1991 and 1995, which contributed to a population decrease of 86%. this study presents the results of two population surveys conducted in 1994 and 1999 based on the fixed point and itineraries method (fpi) and the excrement count (ec) method, as well as data from demographic estimates and clinical observations conducted by the regional a ... | 2004 | 15465713 |