•Introduction to ecology
•Individuals’ ecology
–Organisms limiting factors
–Important abiotic factors
•Population ecology
–Structure and diversity
–Biomass system
–Population regulation
–Interspecific competition
•Community and ecosystem ecology
–Zoogeography
–Aquatic ecological zones and ecosystems in Saudi Arabia
–Ecological relationship between plankton and Nekton in marine, freshwater, and eustraine habitats.
–Effects of ecological factors on aquatic animals and their media