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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Density Estimates of Two Endangered Nocturnal Lemur Species From Northern Madagascar: New Results and a Comparison of Commonly Used Methods
American Journal of Primatology, Volume 74, No. 5, Year 2012
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Description
Very little information is known of the recently described Microcebus tavaratra and Lepilemur milanoii in the Daraina region, a restricted area in far northern Madagascar. Since their forest habitat is highly fragmented and expected to undergo significant changes in the future, rapid surveys are essential to determine conservation priorities. Using both distance sampling and capture-recapture methods, we estimated population densities in two forest fragments. Our results are the first known density and population size estimates for both nocturnal species. In parallel, we compare density results from four different approaches, which are widely used to estimate lemur densities and population sizes throughout Madagascar. Four approaches (King, Kelker, Muller and Buckland) are based on transect surveys and distance sampling, and they differ from each other by the way the effective strip width is estimated. The fifth method relies on a capture-mark-recapture (CMR) approach. Overall, we found that the King method produced density estimates that were significantly higher than other methods, suggesting that it generates overestimates and hence overly optimistic estimates of population sizes in endangered species. The other three distance sampling methods provided similar estimates. These estimates were similar to those obtained with the CMR approach when enough recapture data were available. Given that Microcebus species are often trapped for genetic or behavioral studies, our results suggest that existing data can be used to provide estimates of population density for that species across Madagascar. © 2012 Wiley Periodicals, Inc.
Authors & Co-Authors
Meyler, Samuel Viana
Portugal, Oeiras
Instituto Gulbenkian de Ciência
Salmona, Jordi
Portugal, Oeiras
Instituto Gulbenkian de Ciência
Ibouroi, Mohamed Thani
Madagascar, Majunga
Université de Mahajanga
Besolo, Aubin
Madagascar, Majunga
Université de Mahajanga
Rasolondraibe, Emmanuel
Madagascar, Majunga
Université de Mahajanga
Radespiel, Ute
Germany, Hannover
Tierärztliche Hochschule Hannover
Rabarivola, Clément Joseph
Madagascar, Majunga
Université de Mahajanga
Chikhi, Lounès
Portugal, Oeiras
Instituto Gulbenkian de Ciência
France, Toulouse
Université Toulouse Iii - Paul Sabatier
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
Statistics
Citations: 36
Authors: 8
Affiliations: 5
Identifiers
Doi:
10.1002/ajp.21997
ISSN:
02752565
e-ISSN:
10982345
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
Madagascar