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Title: Aerial surveys of caiman, marsh deer and pampas deer in the Pantanal Wetland of Brazil
Authors: Mourão, Guilherme
Coutinho, Marcos Eduardo
Mauro, Rodiney
Campos, Zilca M.S.
Tomás, Walfrido Moraes
Magnusson, William Ernest
Keywords: Aerial Survey
Conservation Status
Population Estimation
Blastocerus Dichotomus
Caiman Crocodilus
Caiman Yacare
Crocodylidae (all Crocodiles)
Ozotoceros Bezoarticus
Ozotocerus Bezoarticus
Issue Date: 2000
metadata.dc.publisher.journal: Biological Conservation
metadata.dc.relation.ispartof: Volume 92, Número 2, Pags. 175-183
Abstract: The yacare caiman (Caiman c. yacare) was illegally hunted in the Pantanal during the 1970s and 1980s at levels that may have reached one million skins per year. The possibility that yacare caiman had been over-exploited generated pressure for a monitoring programme for caiman populations. The marsh deer (Blastocerus dichotomus) and pampas deer (Ozotocerus bezoarticus) are listed as endangered in Brazil and need the protection of effective management programmes. Ground surveys are difficult for the extensive and inaccessible Pantanal Wetland, south-western Brazil, but aerial surveys provided information that allowed re-evaluation of conservation priorities. Caiman and marsh deer have larger populations than was believed. Preliminary data indicates that the pampas deer density decreased at a rate of about 30% per year from 1991 to 1993. This indicates the need for detailed ground-level studies for the pampas deer population in the Pantanal. We recommend a long term monitoring program using standardized counting procedures for wildlife populations in the Pantanal.
metadata.dc.identifier.doi: 10.1016/S0006-3207(99)00051-8
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