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Lecture 14

BIOL 1902 Lecture 14: Lecture 14 Notes
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Department
Biology
Course
BIOL 1902
Professor
Michael Runtz
Semester
Winter

Description
Lecture 14 Drawbacks to Predators • Prey can fight back (Deer kick out) • Predator can get injured in chase to catch prey • Prey can contain toxins through bioaccumulation(buildup of toxins through food chain) Great Black-backed Gull • Botulism is caused by bacteria, zebra mussels get toxins though filtering the water. Fish feed on the zebra mussels and get those toxins. • DDT bioaccumulation caused falcons to lay eggs with thin shells and behavioral changes (no young produced). • Bird species have reduced over the last few years by close to 80 % (neo-nectonoids) • Most important problem that predators face is “starvation” • Predators are a major force in Natural Selection and Evolution • Parasitoids: eat their prey from inside (host is killed). Some find hosts using “visual searching” and eggs are laid via the “ovipositor”. • Braconid Was
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