Introduction.- 2. Sampling and experimental design.- 3. Collecting zooplankton.- 4. Biomass and abundance.- 5. Sampling, preservation, enumeration and biomass of marine protozooplankton.- 6. Acoustical methods.- 7. Optical methods.- 8. Feeding.- 9. The measurement of growth and reproductive rates.- 10. Metabolism.- 11. Methods for population genetic analysis of zooplankton.- 12. Modeling zooplankton dynamics.