8predation - BIO 20 PRED 1 PREDATION 1. INTRODUCTION types...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 20 PRED 1 PREDATION 1. INTRODUCTION types of predation - ambush (hide + wait) - stalk (long search, short chase) - pursuit (short search, long chase) benefits to prey species - cull weak, old, ill - increase species diversity (decr comp., incr niche overlap) 2. PREDATOR STRATEGIES predator-prey oscillations - predator pop. lags behind prey pop. 1. prey incr > pred incr 2. pred incr > prey decr 3. prey decr > pred decr 4. pred decr > prey incr predator response to prey densities - pred incr own repro & density - pred exploit more prey faster search image - predator seek out most abundant prey - switch to diff prey if more abundant - switch to more palatable prey 3. OPTIMAL FORAGING the most efficient predator - goal obtain more energy than expend factors - where to hunt? - which prey to search? - whether to pursue prey or not? - whether pursuit successful or not? optimal diet - select medium-size prey
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/12/2010 for the course BIO 20 taught by Professor Hom during the Spring '08 term at City College of San Francisco.

Page1 / 3

8predation - BIO 20 PRED 1 PREDATION 1. INTRODUCTION types...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online