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

  • Yvonaldo wladimir saldanha Bizarro UnB
  • Rodrigo Diana Navarro laboratório de aquicultura Universidade de Brasília
  • Oswaldo Pinto Ribeiro Filho
  • Fernanda Keley Silva Pereira Navarro unb
  • Rodrigo Diana Navarro
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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Author Biography

Rodrigo Diana Navarro, laboratório de aquicultura Universidade de Brasília
Possuo graduação em Zootecnia pela Universidade Federal de Viçosa (2001), Mestrado em Zootecnia pela Universidade Federal de Viçosa (2003) e Doutor em Zootecnia pela Universidade Federal de Minas Gerais (2008). Doutorado sanduíche na Universidade Politécnica de Valencia, em Valência Espanha (2007). Pós doutor na Universidade Federal de Lavras. Atualmente Professor de aquicultura da Faculdade de Agronomia e Veterinária FAV da Universidade de Brasília, UnB. Membro Suplente do Conselho da FAV/UnB. Coordenador do Grupo AcquaUnB - Aquicultura/UnB. Líder do grupo do CNPq AcquaUnB. Tenho experiência na área de Zootecnia, com ênfase em Exigências Nutricionais de Animais, exigência nutricional de reprodutores de peixes e atuando principalmente nos seguintes temas: Aquicultura sustentável, aquaponia, produção animal, Piscicultura marinha, Ranicultura, Nutrição de peixes e Anatomia de peixes
Published
2019-11-18
How to Cite
Bizarro, Y. wladimir saldanha, Navarro, R. D., Ribeiro Filho, O. P., Navarro, F. K. S. P., & Navarro, R. D. (2019). Photoperiodic effects in blood glucose, cortisol, hematological parameters and reproductive indexes of gift lineage reversed male tilapia. Bioscience Journal, 35(6). https://doi.org/10.14393/BJ-v35n6a2019-41844
Section
Agricultural Sciences