The Population Analysis System (PAS) two species Time Series Analysis, P2a, is used to analyze and model data on the density of two species of organisms taken at equal intervals over a relatively long period of time; i.e., census data over 10 or more years or generations. NOTE that data analysis with P2a requires prior analysis by the Single Species Time Series Analysis routine P1a.

THEORY

• Logistic population growth
• Competition
• Cooperation
• Exploitation

MODELING

• Data input
• Model fitting
• Model Evaluation

TUTORIALS

• Pine cones and beetles
• Budworms and parasitoids
• Competition between paramecia