The experiment. Methods of collecting specimens to study the ecological Objective to collect the information in a way the quantity about habitat or population, study the social climate. The distribution, territory of residenceClassification of organisms, and by means of experiment. Random using square table know the size, of course. Random number under the line of survey. The density of the creatures in the long axis. Prediction of population by way of Petersen
.The population of organisms is not constant, birth, death, immigration and migration. Each living thing in ecology or areas that differ depending on the physical factors และชีวภาพ proper
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