parasitism is a type of symbisis that may be defined as an inter specific association in which one species, the parasite, lives on or in a second species, the host,
for a significant period of its life, exploiting the host, such as to
obtain nourishment, shelter, and/or protection. The one organism,
usually the physically smaller of the two (the parasite) benefits and
the other (the host) is harmed. This relationship can be loose or mostly
intimate, and for the parasite, it is usually obligatory. (Various
forms of "social parasitism," kleptoparasitism, and "cheating
parasitism," as discussed below, are characterized by a less close
association between parasite and host, however .] while
Social parasites exploit the brood care behavior of another species and exert strong selection
pressures on their hosts.
Apr 15th, 2015
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