BIOL 1902 Lecture Notes - Lecture 13: Ovipositor, Lyme Disease, Nycteribiidae
25 Mar 2016
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Document Summary
Predators can be severely injured when prey tries to fight back. When prey has toxins & builds up in system = bioaccumulation. Great black-backed gull: involves water temperatures, algae, etc. Peregrine falcons were driven to near extinctions by ddt (insecticide: ddt bioaccumulation in peregrines resulted in thinner egg shells, behavioural changes = no young produced. Major force in natural selection & evolution. Other animals eat their prey from inside them: Most can be either killed or left alive in process. Braconid wasps = parasitoids only in larval stage. Many flesh flies = parasitoids in larval stage. Thread-waisted wasp w/ 1 sting, can paralyze prey, then stash prey: spider wasps & digger wasps do this too, ex. Cerceris (digger wasp) dig w/ their mandibles. When right host is found, eggs laid through ovipositor (specialized organ for laying eggs) Megarhyssa ichneumon ovipositors = impressive: ovipositors can serve as drills . When egg hatches, paralyzed horntail larvae eaten alive.
