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Predation I S10 - Predation I BIOL/BOT 160 Ecology...

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Predation I BIOL/BOT 160 – Ecology
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Definition Repeated interaction between species such that members of a species are killed shortly upon capture by the other species. “Repeated” means that a one time occurrence is NOT predation “killed shortly upon capture” http://scienceblogs.com/deepseanews/mbn_shark_wideweb__470x321,0.jpg Predation? http://dsf.chesco.org/ccparks/lib/c cparks/creaturefeature/deer_brow sing.jpg
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Lotka Volterra model Prey Start with exponential growth Let α = the rate at which a predator consumes a prey So the number of prey consumed by predators would be: rN dt dN = 0 . 2 = α Prey Prey Prey N r dt dN = Predator Prey Prey Prey N N r dt dN α - = Predator N * α
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Lotka Volterra model Predator Start with exponential growth Remember that Assume that β is the rate at which predators convert prey to baby predators. So, the birth rate of predators would be Pred Pred Pred N r dt dN = 5 . 0 2 1 = = Prey Predator β ) ( * Pred Pred N b α β = Pred Pred Pred d b r - =
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( 29 [ ] Pred Pred Prey Pred N d N dt dN * - = α β Pred Prey Pred d N r - = ) ( * α β Lotka Volterra model Predator Start with exponential growth Remember that Assume that β is the rate at which predators convert prey to baby predators. So, the birth rate of predators would be Pred Pred Pred N r dt dN = 5 . 0
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