African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 886

Full Length Research Paper

Age and growth of Distichodus antonii (Schilthuis, 1891) (Pisces, Teleostei, Distichontidae) in Pool Malebo, Congo River

Victorine Mbadu Zebe1*, Jean Claude Micha2, Jacques Moreau3 and Mbomba Nseu Bekeli1
  1Laboratoire d’Hydrobiologie, Limnologie et Aquaculture, Département de Biologie, Faculté des Sciences, Université de Kinshasa, B. P.190 Kinshasa XI, R. D. Congo. 2Unité Recherche en Biologie des Organismes (URBO), Département de Biologie, Facultés Universitaires Notre Dame de la Paix (FUNDP), Rue de Bruxelles, 61 B-5000 Namur Belgique. 3Laboratoire de l’Ecologie Fonctionnelle, INP/ENSAT, Avenue de l’Agrobiopole, B. P. 107 Auzeville, Tolozane 31326, Castanet Tolosan, France.
Email: [email protected]

  •  Accepted: 07 February 2010
  •  Published: 31 May 2010

Abstract

 

The estimation of demographic parameters of Distichodus antonii, in Pool Malebo (Congo River), was obtained from analysis of 36 good scales samples. L was estimated at 107.91 cm, K at 0.10 .year-1 and t0 at -0.67 year-1. The growth parameters calculated from this method revealed that this fish has a slow growth rate and it reaches a large size. The analysis of marginal increase shows that the formation of annulus takes place to the dry season. During the dry season, the environmental conditions are disturbed and the access to food becomes difficult. This is probably the base of the stress that induces the formation of annuli on the scales.

 

Key words: Distichodus antonii, age and growth, Congo River, Pool Malebo, Democratic Republic of Congo

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