CIFA Occasional Paper No. 19CIFA/OP19
Cover
PAPERS PRESENTED AT THE
SYMPOSIUM ON BIOLOGY, STOCK ASSESSMENT AND EXPLOITATION OF SMALL PELAGIC FISH SPECIES IN THE AFRICAN GREAT LAKES REGION

CONTENTS/TABLE DES MATIERES

Bujumbura, Burundi, 25 – 28 November 1992.

edited by

Marshall B.E.
Department of Biological Sciences
University of Zimbabwe
P.O. Box MP167, Mount Pleasant
Harare, Zimbabwe

and

R. Mubamba
Department of Fisheries
P.O. Box 350100
Chilanga, Zambia


Preparation of this document

This is the collection of the papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. The symposium, jointly organized by the FINNIDA/FAO/AGFUND project “Research for the Management of Fisheries on Lake Tanganyika” (LTR) and the FAO/UNDP project “Inland Fisheries Planning, Development and Management in Eastern/Central/Southern Africa” (IFIP), was held in Bujumbura, Burundi from 25 to 28 November 1992.

The FAO Inland Water Resources and Aquaculture Service contribution to the symposium was to have the papers edited and published.

In brief account of the symposium including conclusions and follow up is contained in technical document number 6 of the LTR project.

Distribution:
CIFA Mailing List
FAO Fisheries Department
FAO Regional Fishery Officers
Authors

Marshall, B.E.; Mubamba, R. (eds.)

Papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. Bujumbura, Burundi, from 25 to 28 November 1992.

CIFA Occasional Paper. No. 19. Rome, FAO. 1993. 270p.

ABSTRACT

This document contains the papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. The symposium, jointly organized by the FINNIDA/FAO/AGFUND project “Research for the management of fisheries on Lake Tanganyika” (LTR) and the FAO/UNDP project “Inland Fisheries Planning, Development and Management in Eastern/Central/Southern Africa” (IFIP), was held in Bujumbura, Burundi from 25 to 28 November 1992.

The Lakes and Reservoirs included in the 20 Symposium papers are Itezhi-Tezhi, Mweru-Luapula, Malawi, Kariba, Kibu, Tanganyika and Victoria. The small pelagic species treated are Limnothrissa miodon, Stolothrissa tanganicae, Rastrineobola argentea, Poecilothrissa moeruensis and Engraulicypris sardella. The topics covered include biology, life history, growth and mortality and various aspects of the fisheries.


FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
ROME, 1993

Hyperlinks to non-FAO Internet sites do not imply any official endorsement of or responsibility for the opinions, ideas, data or products presented at these locations, or guarantee the validity of the information provided. The sole purpose of links to non-FAO sites is to indicate further information available on related topics.

This electronic document has been scanned using optical character recognition (OCR) software. FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.

CONTENTS/TABLE DES MATIERES

Limnothrissa in man-made lakes: do we understand the implications of their small size? (by B.E. Marshall)

ABSTRACT

1.   INTRODUCTION

2.   STRUCTURE OF THE POPULATION

3.   GROWTH

4.   MORTALITY

5.   THE PRODUCTION/BIOMASS RATIO

6.   THE IMPLICATIONS FOR MANAGEMENT AND RESEARCH

7.   ACKNOWLEDGEMENTS

8.   REFERENCES

APPENDIX

Lates spp. and other predators as a cause of mortality in small pelagic fish species in the African great lakes (by R. Ogutu-Ohwayo)

ABSTRACT

1.   INTRODUCTION

2.   METHODS

3.   RESULTS

4.   DISCUSSION

5.   ACKNOWLEDGEMENTS

6.   REFERENCES

The biology and exploitation of small pelagic fishes in Zambia (by R. Mubamba)

ABSTRACT

1.   INTRODUCTION

1.1.   Emergence of commercial fishing
1.2   Characteristics of the lakes
1.3   Composition, distribution and abundance
        1.3.1   Composition
        1.3.2   Distribution and abundance

2.   THE BIOLOGY OF CLUPEIDS

2.1   Stolothrissa tanganicae
2.2   Limnothrissa miodon
2.3   Poecilothrissa moeruensis
2.4   Microthrissa acutirostris
2.5   Microthrissa stappersi

3.   THE BIOLOGY OF CYPRINIDS

3.1   Engraulicypris moeruensis
3.2   Barbus trimaculatus

4.   OTHER SMALL PELAGICS

5.   FISHING TECHNIQUES

6.   THE CATCH

6.1   Annual catches
6.2   Composition of catch
6.3   The by-catch issue

7.   METHODS OF PROCESSING

8.   MARKETING

9.   GENDER

10.   CONCLUSION

11.   REFERENCES

Introduction of Lake Tanganyika sardines into Itezhi-Tezhi Reservoir, Zambia (by R. Mubamba)

1.   BACKGROUND

2.   METHODS AND RESULTS

2.1   Lake Itezhi-tezhi
        2.1.1   The first release
        2.1.2   The second release

3.   CONCLUSION

4.   ACKNOWLEDGEMENT

5.   REFERENCES

Catch trends of Limnothrissa miodon in Lake Kariba (by J.M.C. Lupikisha)

ABSTRACT

1.   INTRODUCTION

2.   METHODS

3.   RESULTS

3.1.   Catch and effort trends
3.2.   Seasonality
3.3.   Number of rigs
3.4.   Changes in CPUE
3.5.   Total surplus production models

4.   DISCUSSION

5.   REFERENCES

Fitting a Von Bertalanffy growth model to length at age data for larval Limnothrissa miodon from Lake Kariba (by M.Z. Mtsambiwa)

ABSTRACT

1.   INTRODUCTION

2.   METHODS

3.   RESULTS

4.   DISCUSSION

5.   ACKNOWLEDGEMENTS

6.   REFERENCES

The life history style of Limnothrissa miodon in Lake Kariba (by P.C. Chifamba)

ABSTRACT

1.   INTRODUCTION

2.   DISTRIBUTION AND MIGRATION

3.   FEEDING AND CONDITION

4.   GROWTH AND MORTALITY

6.   BREEDING AND RECRUITMENT

7.   COMPETITION AND PREDATION

8.   ABUNDANCE

9.   ACKNOWLEDGEMENTS

10.   REFERENCES

Growth of Usipa (Engraulicypris sardella) in Lake Malawi/Niassa (by A.B. Thompson and A. Bulirani)

ABSTRACT

1.   INTRODUCTION

2.   METHODS

2.1.   Otoliths
2.2.   Length-frequency series

3.   RESULTS

3.1.   Otoliths
3.2.   Length-frequency series

4.   DISCUSSION

5.   REFERENCES

Preliminary report on the fishery and biology of the Chinese complex (Poecilothrissa moeruensis, Neobola moeruensis) of Lake Mweru-Luapula (Zambia) including notes on the feeding of the species of the by-catch (by C.K. Kapasa and P.A.M. Van Zwieten)

ABSTRACT

1.   INTRODUCTION

1.1   General
1.2   A note on the taxonomy of the Chisense complex
1.3   The lake and river system

2.   METHODS AND MATERIALS

2.1   Sampling sites and collection of biological data
2.2   Frame survey

3.   RESULTS

3.1   Biological studies
    3.1.1   Species composition of the catch
        3.1.2   The size of P. moeruensis
        3.1.3   Feeding biology
            3.1.3.1   Poecilothrissa moeruensis
            3.1.3.2   By-catch
        3.1.4   Fecundity of P. moeruensis
3.2   Frame survey

4.   DISCUSSION

4.1   Biology
4.2   Frame survey

5.   REFERENCES

APPENDIX 1

Variation in abundance and distribution of Limnothrissa miodon in the Tanzanian sector of Lake Tanganyika; the need for continued stock assessment (by John D.R. Bayona)

ABSTRACT

1.   INTRODUCTION

2.   METHODS

3.   RESULTS AND DISCUSSION

3.1   Exploitation
3.2   Predator - Prey Interactions
3.3   A Concluding note on stock assessment.

4.   REFERENCES

The fishery of Stolothrissa tanganicae Regan, 1917 in the Tanzanian waters of Lake Tanganyika (by K.I. Katonda)

ABSTRACT

1.   INTRODUCTION

2.   THE BIOLOGY OF THE CLUPEIDS

2.1   Reproductive biology
2.2   Schooling and vertical migration

3.   THE FISHERY

3.1   Catch
3.2   Marketing
3.3   Collection of Fishery Statistics

4.   RECOMMENDATIONS

5.   REFERENCES

Population parameters of Stolothrissa tanganicae and Limnothrissa miodon in the Northern part of Lake Tanganyika (by Mambona Wa Bazolana and M. Fryd)

ABSTRACT

1.   INTRODUCTION

2.   MATERIALS AND METHODS

3.   RESULTS

4.   DISCUSSION

5.   ACKNOWLEDGEMENTS

6.   REFERENCES

Dynamics of the fish stocks of Northern Lake Tanganyika in 1973–1980 with special reference to Limnothrissa miodon (by F.C. Roest)

ABSTRACT

1.   INTRODUCTION

2.   SAMPLING METHODS AND DATA PROCESSING

3.   RESULTS AND DISCUSSION

3.1.   Industrial catches: fluctuations in CPUE and species composition
3.2.   Growth
3.3.   Inshore life of pelagic species

4.   REFERENCES

Demographic characteristics of Stolothrissa tanganicae, Limnothrissa miodon and Lates stapersii in the Northwestern (Zairean) waters of Lake Tanganyika (by N'sibula Mulimbwa and Piero Mannini)

ABSTRACT

1.   INTRODUCTION

2.   METHODS AND MATERIALS

3.   RESULTS AND DISCUSSION

3.1.   Stolothrissa tanganicae
3.2.   Limnothrissa miodon
3.3.   Lates stappersii

4.   CONCLUSIONS

5.   REFERENCES

The effect of increased fishing pressure on the abundance of Limnothrissa miodon in Southern Lake Tanganyika (by Harris Phiri)

ABSTRACT

1.   INTRODUCTION

2.   METHODS

3.   RESULTS

4.   DISCUSSION

Situation économique des pêcheries Burundaises au cours des douze dernières années (par Antoine Kiyuku)

RESUME

1.   INTRODUCTION

2.   HISTORIQUE DU DEVELOPPEMENT

3.   LES ESPECES CAPTURES

4.   DE LA RENTABILITE ECONOMIQUE DES ACTIONS DE PECHE

5.   DE LA PECHE ARTISANALE

6.   DE LA PECHE COUTUMIERE.

7.   ANALYSE COMPARATIVE DU CAPITAL INVESTI ET REMUNERATION DU

8.   RESUME DES CONCLUSIONS ET RECOMMANDATIONS.

Thirteen years of exploitation of Limnothrissa miodon BLGR in Lake Kivu (Rwanda and Zaire) (by M. Mughanda and A. Mutamba)

ABSTRACT

1.   INTRODUCTION

2.   ENVIRONMENT

3.   THE Limnothrissa FISHERY

3.1   Fishing units and effort
3.2   Catch statistics
3.3   Catch per unit of effort
3.4   Resource evaluation
3.5   The main fishery constraints

4.   FUTURE DEVELOPMENT NEEDS

4.1   Major problems with catch and effort data recording system
4.2   Cooperation and fishery policy
4.3   Main research topics

5.   CONCLUSION

6.   REFERENCES

Reproduction et activité migratoire de larves du poisson clupeide Limnothrissa miodon Boulenger (1906) dans la partie sud du lac Kivu (Bassin du Bukavu) (par Kaningini, Mwenyimali)

RESUME

1.   INTRODUCTION

2.   LOCALISATION DE L'ETUDE

3.   MATERIEL ET METHODES

3.1   Examen des gonades
3.2   Echantillonnage de larves
3.3   Traitement des données

4.   RESULTATS

4.1   Evolution des gonades
4.2   Densité et distribution des larves
4.3   Périodes de reproduction
4.4   Sites de fraie

5.   DISCUSSION

6.   CONCLUSIONS

7.   REMERCIEMENTS

8.   REFERENCES

Growth, mortality and mesh size selection of dagaa, Rastrineobola argentea, in the Winam gulf of Lake Victoria (Kenya) (by J.O. Manyala)

ABSTRACT

1.   INTRODUCTION

2.   MATERIALS AND METHODS

3.   RESULTS

4.   DISCUSSION

5.   REFERENCES

Seasonal abundance, vertical migration and the fishery of dagaa Rastrineobola argentea in the Ugandan waters of Lake Victoria (by S.B. Wandera)

ABSTRACT

1.   INTRODUCTION

2.   ARTISANAL FISHING GEAR

2.1   The Beach seine
2.2   The lampara or “boat seine”
2.3   Other fishing methods.

3.   METHODS AND MATERIALS

3.1   Fishing grounds and sampling sites

4.   RESULTS AND DISCUSSION

4.1   Biology of R. argentea
4.2   Seasonal Abundance

5.   ACKNOWLEDGEMENT

6.   REFERENCES