Ecological methods Ecology-- Biodiversity-- Conservation Ecology Ecology-methods insects Absolute population estimates using capture-recapture experiments Absolute Population estimates by sampling a Unit of Habitat -Air,plants,plant products and vertebrate hosts Absolute population estimates by sampling a unit of Aquatic habitat Animal population Animal population study Biological Ecological Sampling and measurement Introduction to the Study of animal populations Population measurement - methods Sampling programme The sampling programme and the measurement and description of dispersion absolute population animal populations ecology habitat-population insect population insect populations mortality sample programme wildlife population