Ecology of the euro, Macropus Robustus (Gould), in North Western Australia - IV Age and Growth

Abstract

Growth and development of the euro, based on results obtained from repeated recaptures of marked animals, are discussed. There is some evidence that growth rate of pouch young of field animals under stringent conditions differs from that of yard animals. Methods of age determination are described and a curve is given for aging euros up to 7 years by molar eruption. Euro growth rates are compared with those for some placental mammals, especially sheep. It is considered that the slow rate of development of the euro is an advantage under marginal conditions, as less energy is required for normal growth.