Determination of ape distribution and population size using ground and aerial surveys : a case study with orangutans in lower Kinabatangan , Sabah , Malaysia

@inproceedings{Ancrenaz2003DeterminationOA,
  title={Determination of ape distribution and population size using ground and aerial surveys : a case study with orangutans in lower Kinabatangan , Sabah , Malaysia},
  author={Marc Ancrenaz and Benoit Goossens and Olivier Gimenez and Azri Sawang and Isabelle Lackman-Ancrenaz},
  year={2003}
}
Because of the difficulties encountered in detecting many large tropical forest-dwelling species in their natural habitat, precise figures concerning the distribution, number and trends of many populations remain deficient. In tropical forests, ground surveys are generally carried out by counting objects along straight lines. These counts require a strict… CONTINUE READING