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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
09/01/1997 |
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Data da última atualização: |
03/04/2017 |
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Autoria: |
COUTINHO, M.; CAMPOS, Z. |
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Afiliação: |
EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS). |
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Título: |
Effect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Journal of Tropical Ecology, v.12, n.5 p.741-747, 1996. |
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Idioma: |
Inglês |
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Conteúdo: |
The Pantanal is a large tropical floodplain (140.000 km2), located near the geographic center of South America. I has a marked seasonality in weather condition and great varianility of habitats. In this study we used ultralight surveys to evaluate the effects of season and habitat on the density of Caiman crocodilus yacare in southern Pantanal. Systematic transects surveys were conducted from March 1993 to March 1994, in two permanent plots of 100 km2 each. One was located in habitat of intermittent river, physiognomically characterized by seasonally innundated open grasslands with patches of gallery forest. The other was in habitats of lakes, which contained a rich community of aquatic macrophytes and are fringed by forests. The observed density of caiman varies seasonally from 4.3+1.5 to 147+ 76 ind-km-2 and 1.0+0.3 to 26+7.9 ind-km-2 in intermittent rivers and perennial lakes respectively. Water levels is the most important factor affecting density in the area of intermittent river, while temperature and other biotoic factors such as reproductive behaviour were more important in areas of lakes. We also discuss some methodological problems related to aerial surveys of caiman population which relate to the feasibility of using ultralight as a wildlife monitoring tool in the Pantanal. |
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Palavras-Chave: |
Aerial survey; Caiman crocodilus yacare; Densidade; Pesquisa aerea; Reptile. |
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Thesagro: |
Jacaré; Réptil; Temperatura. |
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Thesaurus NAL: |
Brazil; density; Pantanal; temperature. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02028naa a2200277 a 4500
001 1790081
005 2017-04-03
008 1996 bl --- 0-- u #d
100 1 $aCOUTINHO, M.
245 $aEffect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil.
260 $c1996
520 $aThe Pantanal is a large tropical floodplain (140.000 km2), located near the geographic center of South America. I has a marked seasonality in weather condition and great varianility of habitats. In this study we used ultralight surveys to evaluate the effects of season and habitat on the density of Caiman crocodilus yacare in southern Pantanal. Systematic transects surveys were conducted from March 1993 to March 1994, in two permanent plots of 100 km2 each. One was located in habitat of intermittent river, physiognomically characterized by seasonally innundated open grasslands with patches of gallery forest. The other was in habitats of lakes, which contained a rich community of aquatic macrophytes and are fringed by forests. The observed density of caiman varies seasonally from 4.3+1.5 to 147+ 76 ind-km-2 and 1.0+0.3 to 26+7.9 ind-km-2 in intermittent rivers and perennial lakes respectively. Water levels is the most important factor affecting density in the area of intermittent river, while temperature and other biotoic factors such as reproductive behaviour were more important in areas of lakes. We also discuss some methodological problems related to aerial surveys of caiman population which relate to the feasibility of using ultralight as a wildlife monitoring tool in the Pantanal.
650 $aBrazil
650 $adensity
650 $aPantanal
650 $atemperature
650 $aJacaré
650 $aRéptil
650 $aTemperatura
653 $aAerial survey
653 $aCaiman crocodilus yacare
653 $aDensidade
653 $aPesquisa aerea
653 $aReptile
700 1 $aCAMPOS, Z.
773 $tJournal of Tropical Ecology$gv.12, n.5 p.741-747, 1996.
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