caa a22 4500 606227296 CHVBK 20210128101157.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s10641-015-0394-4 doi (NATIONALLICENCE)springer-10.1007/s10641-015-0394-4 Dense macrophytes influence the horizontal distribution of fish in floodplain lakes [Elektronische Daten] [Taise Lopes, Eduardo Cunha, João Silva, Rômulo Behrend, Luiz Gomes] Fish species distribution is commonly influenced by aquatic macrophytes. Despite of the usage of these plants as habitats for refuge, feeding and reproduction by fish, too dense macrophyte stands make microhabitats unsuitable for certain fish species. Moreover, the distance from the open water within macrophyte stands may also affect fish species distribution because of increasingly harsh conditions. In order to test differences in species distribution of small-sized fish within macrophyte stands we sampled stands ofEichhorniaspp presenting low and high levels of macrophyte density and at several distances from the open water (0, 3, 6, 9, 12and 15 m). We measured depth, temperature, dissolved oxygen, conductivity and pH of the water column and attributes of the fish assemblages. We captured 1,167 individuals of fish belonging to 24 species. Oxygen was significantly higher in lower levels of macrophyte density and similar patterns were found for fish abundance and species richness. These results indicate that, in general, small sized-fish prefer less dense macrophyte stands. In addition, both depth and oxygen were significantly higher at the closest distance from open water, where the composition of fish species was also distinct from those found in other distances. In accordance with changes in species composition, different fish species showed divergent distribution along distances from the open water. Together these results demonstrate that oxygen content influences fish species composition, and indicate that fish species are able to use less suitable microhabitats most likely because of morphological, physiological and behavioral adaptations. Springer Science+Business Media Dordrecht, 2015 Eichhornia nationallicence Ichthyofauna nationallicence Littoral zone nationallicence Respiratory adaptation nationallicence Niche partitioning nationallicence Lopes Taise Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut Cunha Eduardo Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut Silva João Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut Behrend Rômulo Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut Gomes Luiz Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut Environmental Biology of Fishes Springer Netherlands 98/7(2015-07-01), 1741-1755 0378-1909 98:7<1741 2015 98 10641 https://doi.org/10.1007/s10641-015-0394-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-015-0394-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lopes Taise Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut NATIONALLICENCE 700 1- Cunha Eduardo Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut NATIONALLICENCE 700 1- Silva João Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut NATIONALLICENCE 700 1- Behrend Rômulo Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut NATIONALLICENCE 700 1- Gomes Luiz Departamento de Biologia (DBI), Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/7(2015-07-01), 1741-1755 0378-1909 98:7<1741 2015 98 10641