Comparative analysis of the aquaculture potential of hybrid Tilapia zillii (male) x T. guineensis (female) (Teleostei: Cichlidae) in floating cages, cement tanks and earth ponds

  • Céline SK Nobah Laboratoire d’Hydrobiologie, UFR Biosciences, Université de Cocody Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire
  • Tidiani Koné Laboratoire d’Hydrobiologie, UFR Biosciences, Université de Cocody Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire
  • Valentin N’Douba Laboratoire d’Hydrobiologie, UFR Biosciences, Université de Cocody Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire
  • Jos Snoeks Department of Zoology, Ichthyology, Royal Museum for Central Africa, Leuvensesteenweg 13, B-3080 Tervuren, Belgium; and Laboratory for Comparative Anatomy and Biodiversity, Katholieke Universiteit Leuven, Belgium
  • Gouli Gooré Bi Laboratoire d’Hydrobiologie, UFR Biosciences, Université de Cocody Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire
  • Essetchi P Kouamélan Laboratoire d’Hydrobiologie, UFR Biosciences, Université de Cocody Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire

Abstract

The effect of three rearing systems, floating cages, cement tanks and earth ponds, on the growth rate, feeding efficiency and mortality rates of hybrid tilapia — Tilapia zillii (male) x T. guineensis (female) — was evaluated for 233 days. Fish of average weight 12.59g were stocked at a density of 20 fish m–³ and were fed a 30% protein pelleted commercial feed. The pH, degree of aeration and transparency were monitored. The mortality rate, final mean weight, daily weight gain, and feed conversion ratios were significantly different among rearing systems. The highest potential was in earth ponds (2.86%, 171.70g, 0.74g d–1, 5.42, respectively), the cages were of intermediate potential (7.50%, 137.22g, 0.57g d–1, 7.70) and the lowest potential was in cement tanks (31.86%, 45.23g, 0.15g d–1, 10.28). These differences could be linked to the relevant physical and chemical characteristics of the three different rearing systems.

Keywords: Côte d'Ivoire, tilapia, hybrid fish, growth, rearing conditions, physico-chemical factors

African Journal of Aquatic Science 2006, 31(2): 319–323
Published
2006-12-04
Section
Articles

Journal Identifiers


eISSN: 1727-9364
print ISSN: 1608-5914