Data/hora: 07/06/2024 16:17:38

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 09/01/1997
Data da última atualização: | 03/04/2017
Autoria: | COUTINHO, M.; CAMPOS, Z.
Afiliação: | EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS).
Título: | Effect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil.
Ano de publicação: | 1996
Fonte/Imprenta: | Journal of Tropical Ecology, v.12, n.5 p.741-747, 1996.
Idioma: | Inglês
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.
Palavras-Chave: | Aerial survey; Caiman crocodilus yacare; Densidade; Pesquisa aerea; Reptile.
Thesagro: | Jacaré; Réptil; Temperatura.
Thesaurus Nal: | Brazil; density; Pantanal; temperature.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (33396-1) - UPC - SP - PP - SP15095 -  - 15095 - DIS