Two measures of group activity were assessed using 14 captive groups of pigtail monkeys (M. nemestrina). Absolute frequencies of movement of individuals (a direct measure of activity) was used as a criterion in the evaluation of a sampling technique (an indirect measure of activity). The indirect measure involved monitoring the frequency of movement of individuals past a fixed point in the environment. The indirect measure correlated highly with the criterion measure (r=.91). use of indirect measures of activity such as the one described here can increase the efficiency of data collection by allowing observers sufficient time to monitor a greater range of behaviors. However, sampling techniques should be carefully evaluated in an appropriate context before they are adopted for general use.
ASJC Scopus subject areas
- Animal Science and Zoology