caa a22 4500 606228047 CHVBK 20210128101201.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10641-014-0361-5 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0361-5 Interspecific variation in migratory fish recruitment in the Upper Paraná River: effects of the duration and timing of floods [Elektronische Daten] [A. Oliveira, H. Suzuki, L. Gomes, A. Agostinho] This study evaluated the relationship between the young of year (YOY) abundance of migratory fish species and the interannual variations in the duration and delay of floods in the Upper Paraná River floodplain. YOY of the most abundant migratory species Brycon orbignyanus, Hemisorubim platyrhynchos, Leporinus elongatus, Leporinus macrocephalus, Leporinus obtusidens, Pseudoplatystoma corruscans, Pterodoras granulosus, Prochilodus lineatus, Salminus brasiliensis and Sorubim lima were studied in a stretch of the Paraná river influenced by dams. Multiple regression analyses were performed with flood duration and delay as predictors for YOY abundances. There were differences among the species in the responses to flood duration and delay. The species B. orbignyanus, L. elongatus, L. macrocephalus, L. obtusidens, and P. lineatus exhibited an exponential increase in YOY abundance with flood duration. An exponential decrease in YOY abundance with flood delay was found for most of the studied species. Nevertheless, flood delay and flood duration were significant predictors of YOY abundance for L. elongatus, L. obtusidens, P. corruscans and P. lineatus. For these species, flood delays may result in failure of recruitment because these species migrate early in the season to adjust their energy reserves and their swimming patterns. Therefore, any efforts to preserve migratory fish should consider discharge manipulation from reservoirs upstream of the study areas. It is crucial that reservoirs are operated in such a way that the quantity, duration and timing of water release are compatible with the viability of spawning and the survival of early life stages of migratory fish. Springer Science+Business Media Dordrecht, 2014 Paraná River nationallicence Fishes nationallicence Migration nationallicence Recruitment nationallicence Impact mitigation nationallicence Flooding attributes nationallicence Oliveira A. Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, DBI, Nupélia, Maringá, Brazil aut Suzuki H. Universidade Estadual de Maringá, Nupélia, Maringá, Brazil aut Gomes L. Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, DBI, Nupélia, Maringá, Brazil aut Agostinho A. Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, DBI, Nupélia, Maringá, Brazil aut Environmental Biology of Fishes Springer Netherlands 98/5(2015-05-01), 1327-1337 0378-1909 98:5<1327 2015 98 10641 https://doi.org/10.1007/s10641-014-0361-5 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/s10641-014-0361-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oliveira A. Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, DBI, Nupélia, Maringá, Brazil aut NATIONALLICENCE 700 1- Suzuki H. Universidade Estadual de Maringá, Nupélia, Maringá, Brazil aut NATIONALLICENCE 700 1- Gomes L. Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, DBI, Nupélia, Maringá, Brazil aut NATIONALLICENCE 700 1- Agostinho A. Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, DBI, Nupélia, Maringá, Brazil aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/5(2015-05-01), 1327-1337 0378-1909 98:5<1327 2015 98 10641