| Full text | |
| Author(s): |
L. Casatti
[1]
Total Authors: 1
|
| Affiliation: | [1] Universidade Estadual Paulista. Laboratório de Ictiologia. Departamento de Zoologia e Botânica - Brasil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Biology; v. 64, n. 4, p. 757-765, 2004-11-00. |
| Abstract | |
In this study the fish assemblages of the silted Águas Claras stream (AC) was compared with that of a reference, the São Carlos stream (SC), so as to identify potential fish indicators of integrity or degradation. Both streams, located about 5 km from one another, are part of the Upper Paraná river basin, Brazil, and present similar physiographical features. Twenty-one species were collected in AC (1,271 specimens) and 18 in SC (940 specimens). In AC, dominant species e.g., Corydoras aeneus (sandy pools), Serrapinnus notomelas, and Pyrrhulina australis (warm marginal shallow pools) were those favored by new microhabitats linked to siltation and removal of the riparian vegetation. Changes in the composition of the marginal vegetation resulted in dominance of species such as Hisonotus francirochai (marginal grasses). In SC the dominant species was Phalloceros caudimacultus, abundant in marginal shallow pools, and Trichomycterus diabolus. and Hypostomus nigromaculatus, exclusively riffle-dwelling species, which were absent in AC. Fish assemblage monitoring is recommended for use in riparian management programs in order to evaluate negative instream sedimentation effects. (AU) | |
| FAPESP's process: | 01/13340-7 - Evaluation of the biotic integrity of the rivers of the northwest region of the State of São Paulo, Alto Paraná basin, using communities of fish |
| Grantee: | Lilian Casatti |
| Support Opportunities: | BIOTA-FAPESP Program - Young Investigators Grants |
| FAPESP's process: | 98/05072-8 - Fish diversity of the headwaters and streams of the Upper Paraná River System in the State of São Paulo, Brazil |
| Grantee: | Ricardo Macedo Corrêa e Castro |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |