1. Predators and Prey Ecological Relationships Ms. Oliveri October 16, 2007

2. AIM To review predator and prey relationships To discuss the importance of healthy week and how people are mammals that need to take care of themselves too!

3. What is a Predator? An organism that eats another organism Make a list of as many predators as you can think of right now! (Don’t forget there are land, water, and air predators!) How did you do?

4. Predators Reef Predators Land Predators Air Predators

5. What are Prey? The organism which the predator eats. Try and make another list of the different prey that your list of predators may eat! If you finish that, try and remember the pictures of predators you just saw and make a list of their prey too!

6. Prey

7. Predator and Prey Evolve Together The prey is part of the predator's environment The predator dies if it does not get food A predator needs to evolve in order to catch and eat the prey! Think of some ways a predator would need to evolve to continue catching its prey…

8. Ways a Predator Evolves Speed Stealth Camouflage (to hide while approaching the prey) A good sense of smell, sight, or hearing (to find the prey) Immunity to the prey's poison Poison (to kill the prey) The right kind of mouth parts or digestive system

9. Ways Prey Evolves Prey need to evolve to avoid being eaten! Think of a few ways prey evolve to avoid their predators… Speed Camouflage (to hide from the predator) A good sense of smell Sight Hearing (to detect the predator) Thorns Poison (to spray when approached or bitten)

10. One Example… Snowy environment… Polar bear is white to sneak up on prey Seal is white to avoid being noticed by predator!

11. Lions and Gemsbok The fastest lions are able to catch food and eat, so they survive and reproduce, and gradually, faster lions make up more and more of the population.

12. Predator-Prey Relationships The fastest gemsbok are able to escape the lions, so they survive and reproduce, and gradually, faster gemsbok make up more and more of the population! As both organisms become faster to adapt to their environments, their relationship remains the same: because they are both getting faster, neither gets faster in relation to the other. This is true in all predator-prey relationships!!!