%0 Journal Article
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%@tertiarymark Trabalho Vinculado à Tese/Dissertação
%@nexthigherunit 8JMKD3MGPCW/3ER446E 8JMKD3MGPCW/3EUAPES
%@resumeid
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%@resumeid 8JMKD3MGP5W/3C9JHH6
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%X We investigated the paradox of why Amazonian manatees Trichechus inunguis undergo seasonal migrations to a habitat where they apparently fast. Ten males were tracked using VHF telemetry between 1994 and 2006 in the Mamirauá and Amanã Sustainable Development Reserves, constituting the only long-term dataset on Amazonian manatee movements in the wild. Their habitat was characterized by analysing aquatic space and macrophyte coverage dynamics associated with the annual flood-pulse cycle of the River Solimões. Habitat information came from fieldwork, two hydrographs, a three-dimensional model of the water bodies and classifications of Landsat-TM/ETM+ images. We show that during high-water season (mid-May to end-June), males stay in várzea lakes in association with macrophytes, which they select. We then show that, during low-water (OctoberNovember), the drastic reduction in aquatic space in the várzea leads to the risk of their habitat drying out and increases the manatees' vulnerability to predators such as caimans, jaguars and humans. This explains why males migrate to Ria Amanã. Based on data on illegal hunting, we argue that this habitat variability influences females to migrate too. We then use published knowledge of the environment's dynamics to argue that when water levels are high, the habitats that can support the largest manatee populations are the várzeas of white-water rivers, and we conjecture that rias are the species' main low-water refuges throughout Western Amazonia. Finally, we warn that the species may be at greater risk than previously thought, because migration and low-water levels make manatees particularly vulnerable to hunters. Moreover, because the flooding regime of Amazonian rivers is strongly related to large-scale climatic phenomena, there might be a perilous connection between climate change and the future prospects for the species. Our experience reveals that the success of research and conservation of wild Amazonian manatees depends on close working relationships with local inhabitants.
%N 3
%T The lesser of two evils: seasonal migrations of Amazonian manatees in the Western Amazon
%@electronicmailaddress mantovani@crn.inpe.br
%@secondarytype PRE PI
%K Trichechus inunguis, habitat selection, remote sensing, geographical information system, Sirenia, migration.
%@usergroup administrator
%@usergroup lattes
%@usergroup marciana
%@group CRN-CCR-INPE-MCT-BR
%@group
%@group CRN-CCR-INPE-MCT-BR
%@group DSR-OBT-INPE-MCT-BR
%@e-mailaddress mantovani@crn.inpe.br
%3 j.1469-7998.2009.00655.x.pdf
%@secondarykey INPE--PRE/
%@secondarymark B3_BIOTECNOLOGIA A2_CIÊNCIAS_BIOLÓGICAS_I B2_CIÊNCIAS_BIOLÓGICAS_II B3_CIÊNCIAS_BIOLÓGICAS_III A2_ECOLOGIA_E_MEIO_AMBIENTE A2_INTERDISCIPLINAR B3_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA B1_MEDICINA_II
%F lattes: 1714283455902751 7 ArrautMaMaNoMaKeMa:2010:SeMiAm
%@issn 0952-8369
%2 dpi.inpe.br/plutao@80/2010/06.25.15.11.42
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Mamirau´a Sustainable Development Institute, Tefe´ , AM, Brazil
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Wildlife Conservation Research Unit, Zoology Department, The Recanati-Kaplan Centre, University of Oxford, Tubney, Oxfordshire, UK
%@affiliation 5 Centre for Ecology and Hydrology, Wallingford, Oxfordshire, UK
%B Journal of Zoology
%P 247-256
%4 dpi.inpe.br/plutao@80/2010/06.25.15.11.41
%@documentstage not transferred
%D 2010
%V 280
%@doi 10.1111/j.1469-7998.2009.00655.x
%A Arraut, E. M.,
%A Marmontel, M.,
%A Mantovani, Jose Eduardo,
%A Novo, E. M. L. M.,
%A Macdonald, D. W.,
%A Kenward, R. E.,
%@dissemination WEBSCI; PORTALCAPES.
%@area SRE