Photoperiodic effects in blood glucose, cortisol, hematological parameters and reproductive indexes of gift lineage reversed male tilapia

Authors

  • Yvonaldo wladimir saldanha Bizarro Universidade de Brasília
  • Rodrigo Diana Navarro Universidade de Brasília
  • Oswaldo Pinto Ribeiro Filho
  • Fernanda Keley Silva Pereira Navarro Universidade de Brasília
  • Rodrigo Diana Navarro Universidade de Brasília

DOI:

https://doi.org/10.14393/BJ-v35n6a2019-41844

Keywords:

blood, reproduction, light, dark

Abstract

The objective of this study was to evaluate the influence of the photoperiod on the physiological, hematological and reproductive parameters of tilapia males of the GIFT lineage. The treatments differed in the simulations of emeral photoperiods T1 = 0L: 24E T2 = 24L: 0E, T3 = 12L: 12E. Each aquarium was considered an experimental unit. In the present study, tilapia males under different photoperiods did not present significant differences in gonad weight and gonadosomatic index. At the end of the experiment, there were also no significant differences in hepatosomatic indexes (IHS) of Tilapia males under different treatments. In the present experiment, it was observed that the 0L: 24E treatment obtained a shorter testicular length in relation to the other treatments. In addition, the Tilapia submitted to 24L: 0E presented significant difference for the glucose levels, and did not present significant difference for cortisol levels and survival rate compared withthe other treatments. There were no statistical differences for hematological values. Exposure to different light regimes has shown that for GIFT tilapia, the photoperiod that promotes better reproductive index and well-being conditions is the photoperiod (12L: 12E).

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Published

2019-12-02

How to Cite

BIZARRO, Y. wladimir saldanha, NAVARRO, R.D., RIBEIRO FILHO, O.P., NAVARRO, F.K.S.P. and NAVARRO, R.D., 2019. Photoperiodic effects in blood glucose, cortisol, hematological parameters and reproductive indexes of gift lineage reversed male tilapia. Bioscience Journal [online], vol. 35, no. 6, pp. 1915–1922. [Accessed3 December 2022]. DOI 10.14393/BJ-v35n6a2019-41844. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/41844.

Issue

Section

Agricultural Sciences