Efficacy of Lactobacillus plantarum and Saccharomyces cerevisiae on growth improvement of hybrid Nile and Rufiji tilapia populations

  • Levinus L. Mapenzi University of Dodoma
  • Matern S.P. Mtolera University of Dar es Salaam
  • Dirk J. de Koning Swedish University of Agricultural Sciences
  • Aviti J. Mmochi University of Dar es Salaam
Keywords: probiotics, growth performance, salinity, hybrids, Oreochromis species

Abstract

An investigation of the role of Lactobacillus plantarum and Saccharomyces cerevisiae on growth performance of hybrids from Oreochromis niloticus and Oreochromis urolepis urolepis was carried out in plastic tanks at 10 fish/m3 density and a salinity of 25 units. The probiotic treatments were 2, 4 and 6 g/kg feed while the control feed did not include any probiotics. Growth parameters were measured fortnightly and water quality parameters monitored every day. Survival rate and water quality factors revealed non-significant variations (p > 0.05). Final weight differed significantly among the treatments (p < 0.05). Furthermore, Food Conversion Ratio (FCR), Specific Growth Rates (SGR), and weight gain did not differ significantly (p > 0.05) between the control and 2 g/kg treatments. However, the 4 and 6 g/ kg feed treatments showed significant differences (p < 0.05) from the control diet and 2 g/kg for both L. plantarum and S. cerevisiae. The condition factor did not show any significant difference (p > 0.05) among the treatments. Results of this study indicate that increasing the quantity of commercial probiotics in feeds improved growth rates. Condition factor observed in the treatments could be due to the role of the tested probiotics in improving the water quality of tanks. Therefore, probiotics could potentially be used to enhance coastal aquaculture development.

Author Biographies

Levinus L. Mapenzi, University of Dodoma

Lecturer,

Department of Biology

Matern S.P. Mtolera, University of Dar es Salaam

Senior Lecturer,
Institute of Marine Sciences,

P.O. Box 668,

Zanzibar

Dirk J. de Koning, Swedish University of Agricultural Sciences

Prof. Animal Breeding,

Department of Animal Breeding and Genetics,

Inst för HGEN, Box 7023

750 07 UPPSALA

Visiting address: Ulls väg 26, Uppsala

Aviti J. Mmochi, University of Dar es Salaam

Senior Lecturer,
Institute of Marine Sciences,

P.O. Box 668,

Zanzibar

Published
2021-08-24
Section
Articles

Journal Identifiers


eISSN: 0856-860X
print ISSN: 0856-860X