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Biodiversity, Management and Utilization of West African Fishes View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Research Papers in Economics Biodiversity, Management and Utilization of West African Fishes Edited by Eddie K. Abban Christine Marie V. Casal Patrick Dugan Thomas M. Falk CHAPTER | Topic i Biodiversity, Management and Utilization of West African Fishes Edited by Eddie K. Abban Christine Marie V. Casal Patrick Dugan Thomas M. Falk 2004 Published by the WorldFish Center PO Box 500 GPO, 10670 Penang, Malaysia Abban, E.K., C.M.V. Casal, P. Dugan and T.M. Falk (eds.) 2004. Biodiversity, Management and Utilization of West African Fishes. WorldFish Center Conference Proceedings, 63 p. Perpustakaan Negara Malaysia. Cataloguing-in-Publication Data Boidiversity, management and utilization of West African fi shes / edited by Eddie K. Abban [et al.]. ISBN 983-2346-32-0 1. Biological diversity conservation--Africa, West. 2. Fishery management--Africa, West. 3. Fishes--Africa, West. 4. Fishery resources--Africa, West. I. Abban, Eddie K. 639.90966 Cover photos by: C. Béné, R. Brummett and WorldFish photo collection ISBN 983-2346-32-0 WorldFish Center Contribution No. 1718 Printed by Printelligence (M) Sdn. Bhd. The WorldFish Center is one of the 15 international research centers of the Consultative Group on International Agricultural Research (CGIAR) that has initiated the public awareness cam paign, Future Harvest. ii WorldFish Center | Biodiversity, Management and Utilization of West African Fishes Contents Preface .......................................................................................................................................................................................................................................... v Opening Statements .................................................................................................................................................................................................. vi C.A. Biney (WRI) vi T.M. Falk and W. Villwock (UH) vii P. Dugan (WorldFish) viii U. Lohmeyer (GTZ) ix E. Anang (Fisheries Directorate, Ghana) ix Opening Address from the Minister of Food and Agriculture, Ghana ...................................................... x Session I - Biodiversity, Culture and Importance of Tilapias in West Africa ........................................ 1 Chair: P. Dugan Socio-Economic Importance of Tilapiine Fishes (Teleosti, Cichlidae) 1 E.K. Abban, T.M. Falk and S. Agyakwa Genetic Tools for Assessing Fish Biodiversity and Assisting Culture Practices: An Overview 3 J-F. Agnèse Session I: Summary and Conclusions 5 Session II - The Project and Related Subjects ............................................................................................................................ 6 Chair: Dr. R. Pullin Genetic Diversity of West African Lagoon Tilapias and its Implications for Fisheries, 6 Aquaculture and Biodiversity Conservation: Case Studies on Sarotherodon melanotheron, Sarotherodon nigripinnis and Tilapia guineensis T.M. Falk, G.G. Teugels and E.K. Abban Maintenance and Utilization of Tilapia Genetic Resource in Egypt 11 M. Rezk Tilapia Genetic Resources: Their Conservation and Utilization in South Africa 12 H. Van der Bank Genetic Diversity of the Nile Tilapia Oreochromis niloticus (Teleostei, Cichlidae) from the 13 Volta System in Ghana T.M. Falk and Eddie K. Abban Evaluation of Early Life Culture Performance of Ghanaian Populations of 15 Sarotherodon melanotheron (Teleostei, Cichlidae) E.K. Abban, T.M. Falk and S.K. Agyakwah Evaluation of Culture Performance of Ecotype Collections of Nile Tilapia (Oreochromis 16 niloticus) from the Volta System as Basis for Fish Breeding and Selection Program in Ghana F.K. Attipoe and E.K. Abban First Results on the Aquaculture Potential of a Landlocked Population of the Black-chinned 17 Tilapia, Sarotherodon melanotheron in a Man-made Lake, Ayame (Côte d’ Ivoire) N.I. Ouattara, G.G. Teugels, V.N. Douba and J.C. Philippart CHAPTERContents | Topic iii The Utility of Complete Cytochrome b Sequences for Phylogenetic Studies on African 20 Tilapiines (Teleostei, Cichlidae) T.M. Falk Session II: Summary, General Discussion and Conclusions 26 Session III - Fish and Fisheries Resources: Utilization and Conservation ............................................... 28 Chair: Prof. Ayinla Resources and Constraints of West African Coastal Waters for Fish 28 Production P. Lalèyè and J. Moreau Fish Resources Utilization and Conservation Measures in Niger 31 A. Harouna Development Project of Aquaculture in the Republic of Guinea 32 M.H. Diallo Phenotypic Variation in African Freshwater Fishes: A Geographical Scale Review 32 D. Paugy and Y. Fermon Thermal Infl uence on Sex Determination in Natural Populations of Nile 33 Tilapia, O. niloticus E. Bezault Session III: General Discussion and Conclusions 34 Session IV - International Perspectives .............................................................................................................................................. 36 Chair: E.K. Abban and J-F. Agnèse International Concerns on Fish Biodiversity Conservation in Africa 36 R.S.V. Pullin The Nairobi Declaration on Conservation of Aquatic Biodiversity and Aquaculature in 37 sub-Saharan Africa: Implications for Research on Sarotherodon melanotheron P. Dugan A Regional Approach to a Fish Breeding Program for Farmers: Research and 40 Networking Needs J. Moehl Session IV: General Discussion and Conclusions 42 Session V - West African Fish and Fisheries Association (WAFA) Session .............................................. 43 Chair: A. Diallo Summary of Sessions and Discussions ............................................................................................................................................... 46 Appendices .............................................................................................................................................................................................................................. 50 List of Participants 50 Acronyms 53 iv WorldFish Center | Biodiversity, Management and Utilization of West African Fishes Preface Since 1997, the WorldFish Center (formerly known as ICLARM) currently headquartered in Malaysia, the CSIR-Water Research Institut (WRI) at Accra in Ghana, and the Univerity of Hamburg’s Institut und Zoologisches Museum in Germany have carried out collaborative research on the biodiversity of tilapias in Africa, with special emphasis on the Black-chinned Tilapia, Sarotherodon melanotheron. Their efforts have been fi nancially supported by the German Bundesministerium für Wirtschaftliche Zusammenarbeit und Entwicklun (BMZ) through the German Agency for Technical Cooperation (GTZ). As part of this cooperation, a workshop was convened in July 2002 at WRI, Accra to present major results of their recent efforts. One session of the workshop was devoted to a meeting of the West African Fisheries Association (WAFA). The combined event was called “Biodiversity, Management and Utilization of West African Fishes” with reference to the international genetics project under whose umbrella the WAFA functioned. The present proceedings mainly contain extended abstracts of the papers delivered at the workshop, summaries of discussions, conclusions and recommendations, as well as a list of the participants. It is worth observing that the topics of most papers refl ect the range of issues that need to be integrated in order to determine, document, conserve and utilize the biological diversity of this species. The presentations and discussions also show the limitations of knowledge on the species and thus the need for sustained research. The Editors CHAPTERPREFACE | Topic v Opening Statements Statement from WRI Dr. Charles A.Biney Director Mr. Chairman, Hon. Minister of Food and Agriculture, Distinguished Invited Guests, Colleague Scientists, Ladies and Gentlemen. It is with great pleasure that I make this statement at the opening ceremony of the Workshop on the Biodiversity, Management and Utilization of West African Fishes scheduled from 2 to 4 July 2002 in Accra. On behalf of the Acting Director General, it is my honour to welcome you all to the Council for Scientifi c and Industrial Research (CSIR) of Ghana and in particular to its Water Research Institute (WRI). Mr. Chairman, Hon. Minister, permit me to say a few words about the host Institute to our guests. The CSIR-Water Research Institute (WRI) is one of 13 Research Institutions of the CSIR. It was formed in 1996 by the merging of the erstwhile Institute of Aquatic Biology (IAB) and the Water Resources Research Institute (WRRI), both of the CSIR. The CSIR-WRI has the mandate to undertake research into all aspects of water resources of Ghana in order to provide scientifi c and technical information and services needed for sustainable development, utilization and management of the resources in support of socio-economic development of the country. The six long-term key objectives of the Institute are to: i. Generate information and provide services and appropriate technologies for sustainable development, utilization and management of surface water resources of Ghana; ii. Generate, process and disseminate information on the amount of potable water that can be abstracted from groundwater and the reliability of its recharge; iii. Generate, process and disseminate water and wastewater quality information to end-users; iv. Enhance public health status through sound environmental management and water pollution control strategies;
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