Intrasexual selection.
<P>
   Intersexual  selection  often  leads  to  intrasexual  selection, when
   individuals  of  one  sex  (usually  males)  compete  for mates of the
   opposite sex.
<P>
   Intrasexual  selection  may  be observed in physical combat (agonistic
   behavior) between males.
<P>
   Agonistic wolves:  <A ClAsS=MID Href="../../../med/Vid/Campbell7e/WolvesAgonistic-V.swf" oNClick="popurlt('../../../../med/Vid/Campbell7e/WolvesAgonistic-V.swf');txtcolor('selection_intrasexual1','gray');return false;" Id=selection_intrasexual1><iMg sRc="/images/shockwave.gif" aLt='' boRDer=0></A>