【用戶】【站僕】摩檸Morning
【年級】小一下
【評論內容】原本題目:John B. Calhoun did a classic series of experiments to determine the effects of overpopulation on communities of rats in the 1960s. In each of these experiments, an equal number of male and female adult rats were placed in an enclosure and given an adequate supply of food, water and other necessities. He allowed the rat populations to increase to approximately twice the number that could live in the enclosure without experiencing stress due to overcrowding. He then carefully observed and recorded behavior in these overpopulations communities. At the end of these experiments, Calhoun w...