Cannibalism, growth performance, and body composition of giant trahira juveniles under different photoperiods
DOI:
https://doi.org/10.1590/S1678-3921.pab2018.v53.25778Keywords:
Hoplias intermedius, fish, lipids, muscleAbstract
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.Downloads
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Published
2018-08-23
How to Cite
Ramos, S. E., Carvalho, A. F. S. de, Castro, T. F. D., Vasconcelos, A. C. N., Veras, G. C., Mourão Júnior, C. A., & Murgas, L. D. S. (2018). Cannibalism, growth performance, and body composition of giant trahira juveniles under different photoperiods. Pesquisa Agropecuaria Brasileira, 53(6), 664–672. https://doi.org/10.1590/S1678-3921.pab2018.v53.25778
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AQUACULTURE