caa a22 4500 606226583 CHVBK 20210128101153.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10641-014-0232-0 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0232-0 Reproductive biology of the piranha Serrasalmus gouldingi (Fink and Machado-Allison 1992) (Characiformes: Serrasalmidae) in "drowned” rivers of the Eastern Amazon [Elektronische Daten] [Bruno da Silveira Prudente, Maria Ferreira, Rossineide da Rocha, Luciano de Assis Montag] In many species of Neotropical fishes, reproductive patterns are influenced by fluctuations in abiotic factors such as the flood pulse, temperature, and the physical-chemical characteristics of the aquatic environment. The present study describes the reproductive biology of the piranha, Serrasalmus gouldingi, in "drowned” rivers of the region of the lower Anapu River in the eastern Brazilian Amazon basin. A total of 262 specimens were collected between July, 2010, and May, 2011, of which 113 were male and 149 female. The sex and maturity of these specimens were characterized histologically, and the sex ratio, gonadosomatic index, relative frequency of the different stages of maturity, size at first sexual maturation, and condition factor were determined and analyzed in the context of seasonal variation in river levels. Two major reproductive peaks were observed during the transitional flood and ebb periods, coinciding with a predominance of female specimens and higher frequencies of the mature, spawned, spent, and resting gonadal stages. Sexual maturity began at 12.24cm in males and 16.33cm in females. Positive allometric growth was associated with a decrease in the condition factor during the peaks of reproductive activity, which occurred prior to the principal fluctuations in local river levels. Springer Science+Business Media Dordrecht, 2014 Flood pulse nationallicence First maturity nationallicence Natural history nationallicence Reproductive cycle nationallicence da Silveira Prudente Bruno Laboratório de Ecologia e Zoologia de Vertebrados - Ictiologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut Ferreira Maria Laboratório de Imunohistoquímica e Biologia do desenvolvimento, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut da Rocha Rossineide Laboratório de Ultraestrutura Celular, Instituto Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut de Assis Montag Luciano Laboratório de Ecologia e Zoologia de Vertebrados - Ictiologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut Environmental Biology of Fishes Springer Netherlands 98/1(2015-01-01), 11-22 0378-1909 98:1<11 2015 98 10641 https://doi.org/10.1007/s10641-014-0232-0 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/s10641-014-0232-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- da Silveira Prudente Bruno Laboratório de Ecologia e Zoologia de Vertebrados - Ictiologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut NATIONALLICENCE 700 1- Ferreira Maria Laboratório de Imunohistoquímica e Biologia do desenvolvimento, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut NATIONALLICENCE 700 1- da Rocha Rossineide Laboratório de Ultraestrutura Celular, Instituto Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut NATIONALLICENCE 700 1- de Assis Montag Luciano Laboratório de Ecologia e Zoologia de Vertebrados - Ictiologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, 01 - Guamá, 66075-110, Belém, Pará, Brazil aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/1(2015-01-01), 11-22 0378-1909 98:1<11 2015 98 10641