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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Organization of fish assemblages in blackwater Atlantic Forest streams

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Esteves, Katharina Eichbaum [1] ; Candido Silva, Marcelo Horikoshi [2] ; Nanini-Costa, Maressa Helena [3] ; Petesse, Maria Letizia [2]
Total Authors: 4
[1] APTA, Inst Pesca, Secretaria Agricultura & Abastecimento Estado Sao, Ctr Pesquisa Recursos Hidr, Ave Francisco Matarazzo 455, BR-05001900 Sao Paulo, SP - Brazil
[2] APTA, Inst Pesca, Secretaria Agricultura & Abastecimento Estado Sao, Programa Posgrad Aquicultura & Pesca, Ave Francisco Matarazzo 455, BR-05001900 Sao Paulo, SP - Brazil
[3] Controle Analit Analises Tecn Ltda, Rua Lao 18, 281, BR-06296180 Osasco, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Neotropical Ichthyology; v. 17, n. 1 2019.
Web of Science Citations: 0

ABSTRACT This study aimed to determine whether fish species occupy different mesohabitats, as defined by specific criteria of substrate types in Atlantic Forest blackwater streams. We sampled fourteen coastal blackwater rivers along the coast of São Paulo State, Brazil, during the low-flow season (June-September/2016). For each stream, we selected three mesohabitat types (sand, leaf-litter and trunks) in a 100 m river stretch. We sampled 41 mesohabitats, 31 of which contained fish, resulting in 15 species. When multivariate analysis of variance (MANOVA) was applied to the mesohabitat abiotic variables, no significant differences were indicated between them. ANOSIM for species density and biomass and Redundancy Analyses (RDAs) for species density, biomass and fish community indexes showed similar patterns of community structure among mesohabitats. Nevertheless, fish biomass, diversity and richness were associated with such unique environmental features as low shading and shallow habitats. The observed dispersion among mesohabitats suggests that these communities are subject to some level of disturbance, which may affect the value of patches as refugia. Thus, the sharing of these mesohabitat patches among species may represent an opportunistic strategy to maximize the use of available resources for these low density populations living in these unique environments. (AU)

FAPESP's process: 15/26728-6 - Influence of macro and mesohabitats on fish distribution of Atlantic Forest Blackwater Rivers
Grantee:Katharina Eichbaum Esteves
Support Opportunities: Regular Research Grants