Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/57829
Title: The effect of photoperiod and feeding frequency on larval of the Amazonian ornamental fish Pyrrhulina brevis (Steindachner, 1876)
Keywords: Artemia
Cycle of light/dark
Feeding management
Fish larvae
Ornamental fish
Peixes ornamentais
Fotoperíodo
Larvas de peixe
Peixes - Alimentação
Issue Date: Mar-2016
Publisher: Wiley Online Library - John Wiley & Sons
Citation: VERAS, G. C. et al. The effect of photoperiod and feeding frequency on larval of the Amazonian ornamental fish Pyrrhulina brevis (Steindachner, 1876). Aquaculture Research, [S. I.], v. 47, n. 3, p. 797-803, Mar. 2016.
Abstract: This study aimed to evaluate the performance of Pyrrhulina larvae, Pyrrhulina brevis, under different photoperiods and feeding frequencies. A completely randomized design was used, with four replicates in a 5 × 2 factorial, with five photoperiods (6L:18D, 12L:12D, 16L:8D, 20L:4D, 24L:0D) and two feeding frequencies (two or four times a day). Four hundred larvae with an initial length of 4.6 ± 0.09 mm were randomly distributed in 40, 1‐L containers at a density of 10 larvae/L. Feeding was performed with Artemia nauplii in the ratio of 150 Artemia nauplii/larva/feeding. After 15 days, all larvae were euthanized for measurements of length (mm), final weight (mg), survival rate (%) and larvae uniformity in weight an length (%). The data were subjected to analysis of variance and subsequently, in case of significance, a Tukey test was performed to compare means. There was no interaction between photoperiod and feeding frequency on studied variables (P > 0.05). Likewise, there was no influence of feed rate on the same variables (P > 0.05). There was only influence of photoperiod, where the larvae subjected to longest photoperiods (24L:0D and 20L:4D) showed improved weight and length (P < 0.05). Therefore, a photoperiod of 20L:4E, with feeding twice a day is recommended.
URI: https://onlinelibrary.wiley.com/doi/full/10.1111/are.12538
http://repositorio.ufla.br/jspui/handle/1/57829
Appears in Collections:DMV - Artigos publicados em periódicos

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