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Artificial propagation of Clarias lazera at the Fish Culture Centre Hatchery, Bangui-Landjia, Central African Republic. A report

Hatchery Production and Research Centre

Year of publication 1983

Pages p. 10

Author Woynarovich, E.;Fisheries and Aquaculture Management Division

Product type Project

Category Programme / project report

Edition 1

Synopsis (short abstract) The Government of the Central African Republic, assisted by the Food and Agriculture Organization of the United Nations, is engaged in a project whose main purpose is the establishment and operation of a hatchery to be attached to the national fish culture centre of Bangui-Landjia for: the propagation and semi-intensive culture of Clarias lazera; research activities; provision of fingerlings and training. The project has been financed by a contribution from the technical assistance funds of the Government of the Netherlands. As part of the project operation, FAO assigned Dr E. Woynarovich as Consultant from 4 to 17 July 1983 with the following terms of reference: Under the guidance of the Fisheries Expert (Fish Culture), the Consultant will advise on more efficient methods to be applied at the hatchery of the fisheries station at Landjia, including: all reproduction stages rearing of larvae and fry feeding control of the effects of the use of manure and fertilizers contro l of various enemies of eggs and larvae management of broodstock regulation of water supply.

Cite this content as:

Woynarovich, E. Dec 1983. Artificial propagation of Clarias lazera at the Fish Culture Centre Hatchery, Bangui-Landjia, Central African Republic. A report. 10p.

Language English

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    This report was prepared during the course of the project identified on the title page. The conclusions and recommendations given in the report are those considered appropriate at the time of its preparation. They may be modified in the light of further knowledge gained at subsequent stages of the project. The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of the United Nations or the Food and Agricu lture Organization of the United Nations concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.
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    Le prsent document technique, destin en premier lieu aux cadres nationaux responsables des stations piscicoles aux centres de formation, et aux vulgarisateurs aquacoles, traite de la propagation artificielle de Clarias lazera (= C. gariepinus). Aprs avoir expos dans ses grandes lignes le mcanisme biologique fondamental de la reproduction naturelle, le document technique dcrit en dtail les facilits du btiment adapt la reproduction provoque, ou closerie. Dans ce document technique on explique: les tapes de la propagation artificielle de la section des gniteurs sauvages, les conditions d'levage de ces gniteurs, le traitement hormonal, l'extraction manuelle des oeufs, la fcondation de ceux-ci jusqu'a l'incubation des oeufs feconds. Le texte est abondamment illustr.
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    Fish feed requirements and manufacture, Central African Republic
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    The Hatchery Production and Research Centre at Bangui-Landjia Project was established in 1980 under the FAO/Government Cooperative Programme (GCP/CAF/007/NET) with funds provided by the Government of the Netherlands. The project is engaged primarily in work on the African catfish (Clarias lazera), although activities outside the hatchery building itself include pond experiments and small-scale commercial production of Clarias and tilapia in polyculture. Because catfish culture generally requ ires artificial feeding, these experiments are important in determining the technical and economic feasibility for commercial production of the species, using feeds made from a rather limited selection of local ingredients. The need to process compound feeds arises from the desire for diets with high water stability in order to prevent feed wastage and to control fish disease. Feed processing equipment purchased earlier under the FAO project Vulgarisation de la Pisciculture et Autofinancement des Stations Piscicoles Principales (CAF/80/002), referred to in this report as the other FAO project, are employed in making all feeds presently required for the project. As part of the operation of the project, FAO assigned Dr K. W. Chow, Fish Feed Technologist, Aquaculture Development and Coordination Programme, as a consultant to the project. This report summarizes the consultant's findings made during the period 7 to 17 November, 1983, concerning the supply of feed ingredients to meet bot h present and future needs of the station and the state of existing feed manufacturing machinery and their need for repairs and upgrading. It also includes a brief description of repairs carried out on the machinery during the period, construction of equipment for moist, pelleted feed production, and discussions with Mr J. A. L. Janssen, FAO Fish Culture Expert on the project, concerning his work plan for 1984.
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