1. Natural selection and predator–prey interactions

2. Announcement *assignment include filling tables in page 149, 150, 151,
152, 153 and 154. Two graphs demonstrating changes in
frequency and another two demonstrating changes in
fitness values of both predator and prey

3. Ecological interactions between organisms
1-Competition
two organisms using the same resources
2-Predator-prey (parasite-host interactions)
benefit itself while harming another
3-Mutualism
both participants benefit from an interaction
4-Commensalism
one participant benefit while is unaffected
5-Amensalism
one participant is harmed but the other is unaffected

4. Natural selection (Adaptation)
* Traits (genetic makeup) that confer superiority in
survival and reproduction to their owner.
*Organisms interactions involve reciprocal
changes over time. This kind of evolutionary is termed
coevolution.
*Fitness: genotype reproductive contribution to
subsequent generation

5. Natural selection * Fitness formula for predator Wi= Ci/C Ni/N
*Fitness formula for prey
Wi= ei/e
ni/ n
* 3 predator morph (same sp) and 4 prey sp
* 2 min capture period