Abstract
This study the Population Estimate of Mona Monkey in Oban East Range of Cross River National Park was aimed to estimate the absolute population density, abundance, the activity budget and preference of plant species utilized as food by Mona monkey in Oban East Range of Cross River National Park, Survey was used to collect data. The result revealed that the absolute population density of Mona monkey is estimated to be 2.5 ± 0.7 individual/km2 with co-efficient variation of 20.02 and confidence interval of 3.838 4 – 154.00. The population density of Mona monkey in Oban East Range is relatively low, this might be as a result of some anthropogenic activities, hence need for the intervention of the management of National Park and the Federal Government of Nigeria. Regular monitoring of the population trends of Mona monkey is advocated. This will enable the management of the park to promptly notice any further decline in the population density of the animal and to take drastic actions.
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