caa a22 4500 606228209 CHVBK 20210128101202.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10641-014-0307-y doi (NATIONALLICENCE)springer-10.1007/s10641-014-0307-y The importance of a conservation unit in a subtropical basin for fish spawning and growth [Elektronische Daten] [Simoni Ziober, David Reynalte-Tataje, Evoy Zaniboni-Filho] Studies for location of breeding sites and early development areas of freshwater fish in subtropical basins are still incipient. Most of the existing knowledge is based on sampling in environments impacted by dams of hydroelectric power plants and studies in areas with characteristics similar to the original are lacking. In this way, this study evaluated the spatial distribution of the ichthyoplankton in a Conservation Unit (Turvo State Park, Rio Grande do Sul State, Brazil) on the subtropical basin of the Uruguay River, in a stretch with no hydroelectric power plants and at best preservation condition. The density distribution of fish eggs and larvae was evaluated quantitatively through plankton nets samples, while the analysis of the species composition of larvae was assessed qualitatively through plankton nets and light traps sampling. There were significant differences in two stretches situated inside the park separated by a waterfall, both in the distribution of eggs and larvae and in species composition of the larval assemblage. Our results indicate that periods without the total flood of Yucumã Falls influences the composition of the ichthyoplankton and the existence of two distinct reproductive environments over an approximate length of 50km. This result supports the hypothesis that in subtropical basins the alternation of flood and dry periods can influence the structure of fish community and evidences the importance of maintenance of hydrological conditions to fish reproduction in this river section, because showed the importance of the habitat diversity in the river channel to fish recruitment. Springer Science+Business Media Dordrecht, 2014 Uruguay River nationallicence Ichthyoplankton nationallicence Freshwater fishes nationallicence Turvo state park nationallicence Yucumã falls nationallicence Ziober Simoni Programa de Pós-Graduação em Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Rodovia Admar Gonzaga, 1346, Itacorubi, 88034-001, Florianópolis, Santa Catarina, Brazil aut Reynalte-Tataje David Campus Cerro Largo, Universidade Federal Fronteira Sul, Rua Major A. Cardoso, 590, Centro, 97900-000, Cerro Largo, Rio Grande do Sul, Brazil aut Zaniboni-Filho Evoy Programa de Pós-Graduação em Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Rodovia Admar Gonzaga, 1346, Itacorubi, 88034-001, Florianópolis, Santa Catarina, Brazil aut Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 725-737 0378-1909 98:2<725 2015 98 10641 https://doi.org/10.1007/s10641-014-0307-y 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/s10641-014-0307-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ziober Simoni Programa de Pós-Graduação em Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Rodovia Admar Gonzaga, 1346, Itacorubi, 88034-001, Florianópolis, Santa Catarina, Brazil aut NATIONALLICENCE 700 1- Reynalte-Tataje David Campus Cerro Largo, Universidade Federal Fronteira Sul, Rua Major A. Cardoso, 590, Centro, 97900-000, Cerro Largo, Rio Grande do Sul, Brazil aut NATIONALLICENCE 700 1- Zaniboni-Filho Evoy Programa de Pós-Graduação em Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Rodovia Admar Gonzaga, 1346, Itacorubi, 88034-001, Florianópolis, Santa Catarina, Brazil aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 725-737 0378-1909 98:2<725 2015 98 10641