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Title: Cannibalism, growth performance, and body composition of giant trahira juveniles under different photoperiods
Other Titles: Canibalismo, desempenho de crescimento e composição corporal de juvenis de trairão em diferentes fotoperíodos
Keywords: Hoplias intermedius
Giant trahira - Body composition
Giant trahira - Cannibalism
Giant trahira - Growth performance
Trairão - Composição corporal
Trairão - Canibalismo
Trairão - Performance de crescimento
Issue Date: Jun-2018
Publisher: Embrapa Secretaria de Pesquisa e Desenvolvimento Pesquisa Agropecuária Brasileira
Citation: RAMOS, S. E. et al. Cannibalism, growth performance, and body composition of giant trahira juveniles under different photoperiods. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 53, n. 6, p. 664-672, June 2018.
Abstract: The objective of this work was to determine the effect of photoperiod on the cannibalism, growth, and body composition of giant trahira (Hoplias intermedius) juveniles. A completely randomized design was employed, with four photoperiods - 0L:24D, 6L:18D, 12L:12D, and 18L:6D, hours of light (L): dark (D) - and four replicates, for a period of 90 days. The analyzed parameters were: cannibalism, growth in weight and length, food consumption, feed conversion, protein efficiency rate, muscle growth, and body composition (moisture, lipid, ash, and crude protein). Fish from the 12L:12D photoperiod showed the highest survival rate and no cannibalism, as well as a great uniformity for length and mass values at the end of the experiment. The best photoperiod for giant trahira juveniles is 12L:12D, as these fish showed growth uniformity and no cannibalism, while fish from the 6L:18D and 18L:6D groups had a greater diameter of white muscle fibers and a higher frequency of greater diameter fibers. Giant trahira showed the lowest value for lipids at 6L:18D and the highest value at 12L:12D. Photoperiod affects survival and cannibalism; regarding body composition, only lipids are influenced by photoperiod.
Appears in Collections:DMV - Artigos publicados em periódicos

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