Estudos ecológicos dos ciconiiformes (aves) nos hábitats de forrageamento da planície alagável do alto rio Paraná, Brasil.
Cap.1. The structure and composition of Ciconiiformes community in the foraging habitats on the floodplain of the upper river Paraná, Brazil, as well as the possible seasonal variations in the selection of these habitats for each species and the seasonal population fluctuations of the species in the studied habitats were analyzed. Four foraging habitats were considered: rivers, channels, connected lagoons and disconnected lagoons. Data on prey availability (fish) in the foraging habitats along the sampling period were obtained. Quarterly samplings of Ciconiiformes were conducted in 2002 and 2003, by foot or by boat. A total of 15 species of Ciconiiformes was registered in the area, and connected lagoons presented the highest species number and highest abundance for most species. Egretta thula, Mycteria americana, Platalea ajaja and Jabiru mycteria were the species more dependent on high-quality patches, because they frequently selected connected lagoons (habitat with highest prey availability) and abandoned the area during flood. Ardea cocoi, Ardea alba and Tigrisoma lineatum were not so dependent on highquality patches, using habitats with lower prey availability and they did not abandon totally the area during flood. Variations in the foraging techniques and social behavior explain that difference between the two groups. Besides a considerable species number, the study area can have special importance as feeding place for the Pantanal populations of M. americana and P. ajaja during migration to Argentina and Rio Grande do Sul. Management strategies that maintain the hydrologic regime more similar possible to the natural are necessary in order to promote an enhancement of the area as foraging place for Ciconiiformes.
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| Format: | Thesis/Dissertation biblioteca |
| Language: | Portuguese |
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Universidade Estadual de Maringá. Departamento de Biologia. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais.
2005
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| Subjects: | Foraging habitats, Ciconiiformes, Upper Paraná River, Floodplain, Ciências Ambientais, Planície alagável, Disponibilidade de presas, Comportamento social, Alto rio Paraná, Aves, Hábitats de forrageamento, Birds, Brasil, Brazil, |
| Online Access: | http://hdl.handle.net/1834/10046 |
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