Biology 3484A/B Lecture Notes - Parasitoid Wasp, Wasp Waist, Parasitoid
24 Dec 2012
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Document Summary
The order hymenoptera contains the basal sawfly groups and the apocrita. The apocrita comprises the advanced hymenopterans with a wasp waist, including all the parasitoids (50 families) and the. Aculeata (stinging hymenoptera including stinging wasps, bees, and ants). Ectoparasitoid the wasp larva (the parasitoid) feeds on the outside of the host body. Endoparasitoid the wasp larva (the parasitoid) feeds on the inside of the host body. Oviposition the act of ovipositing, or laying eggs. Parasitoids have venom, or substances injected through the ovipositor, that paralyze or subdue the host before or during oviposition. These are not defensive venoms, but in some groups (stinging wasps) the venom has evolved to become defensive. Parasitoids come out at night because their hosts are nocturnal. They have aggressive behaviour only when they"re being threatened and they can use their ovipositor as a defensive mechanism. Parasitoids can also be divided into idiobiosis and koinobiosis.
