Absolute population estimates using capture-recapture experiments 1 Absolute Population estimates by sampling a Unit of Habitat -Air,plants,plant products and vertebrate hosts 1 Absolute population 1 Absolute population estimates by sampling a unit of Aquatic habitat 1 Animal population study 1 Ecology 1 Fresh water habitat 1 Introduction to the Study of animal populations 1 Sampling programme 1 The sampling programme and the measurement and description of dispersion 1 absolute population 1 wildlife population 1