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IUCN/SCC Otter Specialist Group Bulletin
© IUCN/SCC Otter Specialist Group
Volume 20
Issue 2 Pages 58 - 90 (October 2003)
Abstracts
Natural Deaths Of Giant Otters (Pteronura
brasiliensis) In Balbina Hydroelectric Lake, Amazonas, Brazil
Pages 62- 64 (Report)
Fernando César Weber Rosas, Gália Ely De Mattos
Abstract
In 1987 the Brazilian Northern Electric Company (ELETRONORTE) finished
damming the Uatumã River that formed the 3,246 km2 lake (containing
3,299 islands) of the Balbina hydroelectric power station. In 2001,
through a project entitled "Social organization, behavior and diet
of the giant otter (Pteronura brasiliensis) in the influenced area of
Balbina hydroelectric power station, Amazonas, Brazil", the authors
started to study giant otters in the reservoir (de MATTOS et al., 2002;
ZUANON et al., 2002). Despite being an enormous area, we managed to
record two dead otters in the lake.
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Recent Records For The Neotropical River Otter (Lontra
longicaudis) In Guerrero, Mexico.
Pages 65 - 68 (Report)
Jiménez R. E. Maldonado, C. A. López González
Abstract
New neotropical otter records were obtained opportunistically whilst
carrying out a field survey between August 2002 and April 2003. The
study area was located in the southwestern portion of the Mexican State
of Guerrero, encompasses an area of 11,594 km2, and includes the
municipalities (local government entities) of Coyuca de Benítez, Atoyac
de Álvarez, San Jerónimo de Juárez, Tecpan, Petatlán, Zihuatanejo
and La Unión. These municipalities constitute the region known as Costa
Grande, located between 17°00'-17°58' N latitude and 100°00'-101°45'
W longitude (Fig. 1). The presence of neotropical otters was confirmed
through interviews with ranchers, hunters and tanneries (LÓPEZ-GONZÁLEZ
and BROWN, 2002; McNAB and POLISAR, 2002). Physical records (skins,
skulls, and captive individuals) were documented through photographs.
The records were plotted on a 1:250,000 map using ArcView 3.2a (ESRI
1999), creating a geographic information system that included vegetation
(PALACIO-PRIETO et al., 2000), elevation and human settlement layers (CONABIO,
2003).
Contents | Full
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K)
Camera Trap Use For Studying Giant Otters (Pteronura
brasiliensis) In The Yasuní Biosphere Reserve, Ecuadorian Amazon
Pages 69 - 71 (Report)
Víctor Utreras, Luis Pinos
Abstract:
Since January 2003, during field surveys of giant otters (Pteronura
brasiliensis) carried out in the Yasuní Biosphere Reserve
(north-eastern Ecuadorian Amazon), we have been testing the use of
camera traps as a supplementary technique for studying this species.
Camera traps are used for population monitoring of several medium to
large size wildlife species. This technique can also provide information
about home range size, habitat use, and behavioural activities such as
daily and seasonal movements and activity periods. In addition, it is
possible to identify many individuals through distinctive features using
camera traps activated by the individuals themselves.
Contents | Full
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