<prompt> Gadzira shanduro yakaoma zvikuru yemutsara uyu Zviratidzo zveultrasound zvinobatsira zvikara zvinopamba usiku kudzidza kudzivisa masvosve Dunning DC, Roeder KD March 1965 Manzwi esvosve uye mufambiro wokubata tupukanana wematezvara.  <response>: Chokwadi, shanduro yakaoma kunzwisisa zvikuru yemutsara wacho ndeiyi Zviratidzo zveultrasound zvinobetsera vapambi vousiku kudzidza kudzivisa masvosve Dunning and Roeder 1965, Hristov and Conner, 2005, uye zvinogona kukanganisa mano ebate okuwana nenzira yakarurama masvosve anobhururuka Ratcliffe and Fullard, 2005. . 