BIOL 2001 Lecture Notes - Lecture 9: Parasitism, Dracunculus Medinensis, Helminths
12 Nov 2018
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Document Summary
An insect (e. g. the ichneumon wasp) whose larvae live as parasites that eventually kill their hosts (typically other insects). #parasites decrease the host"s reproduction output indirectly by extracting resources from the host"s body. A parasite whose host, often an insect, is also a parasite or parasitoid. 1-density dependent: number of parasites increases as the host"s population density increases due to increased opportunities for infected hosts to contact other hosts. 2-frequency dependent: parasite transmission rate doesn"t depend on the host population density. It is a tiny (microparasite) monogenean (found on the skin, gills, or ns of. Sh) ectoparasite (live outside of the body unlike endoparasites) that lives on the body surface of freshwater sh. It feeds on epithelial cells and the damage can result in secondary infections. Their populations growth is exponential and are highly contagious. Gyrodactylus salaris is a serious threat to wild and farmed salmon stocks.
