CIFA Occasional Paper No. 15CIFA/OP15
Cover
PREDATOR-PREY RELATIONSHIPS, POPULATION DYNAMICS AND FISHERIES PRODUCTIVITIES OF LARGE AFRICAN LAKES
Contents


edited by

D. Lewis
“Threeways”
Sulgrave, Nr. Banbury
Oxfordshire OX17 2SG
U.K.


Preparation of this document

This is a collection of papers presented at the Third Session of the Stock Assessment Working Group of the FAO Committee for the Inland Fisheries of Africa in Lusaka, Zambia, 30 September to 2 October 1985.

The theme of the third session was “predator-prey relationships, population dynamics and fisheries productivities of large African lakes”.

Dr. Digby Lewis was contracted by FAO to edit the papers.

Abstract
This volume contains 11 papers prepared on the theme of predator-prey relationships, population dynamics and fisheries productivities of African Lakes. The lakes include Malawi, Tanganyika, Victoria, Kivu, Kioga and Abaya as well as Kariba Reservoir.
The papers were prepared for the FAO Committee for Inland Fisheries of Africa Working Group on Stock Assessment, Third Session held in Lusaka, Zambia in September 1985.

Distribution:For bibliographic purposes this
document should be cited as follows
:
FAO Fisheries Department
FAO Regional Fishery Officers
CIFA Mailing List
Fishery Directors of Member Countries
Lewis, D. (ed.), 1988 Predator-prey relationships, population dynamics and fisheries productivities of large African lakes. CIFA Occas. Pap., (15): 154 p.

COMMITTEE FOR INLAND FISHERIES OF AFRICA

FOOD AND AGRICULTURE ORGANISATION OF THE UNITED NATIONS
Rome, 1988


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Contents

A review of the biological productivity and fish predation in Lake Tanganyika, by John D.R. Bayona

Abstract

1.   INTRODUCTION

2.   PRIMARY PRODUCTION

2.1   Qualitative Judgement of Productivity

2.2   Qualitative assessment of Algal Production

2.3   Trophic status

2.4   Other Sources of Production

3.   FISH PRODUCTION AND YIELD ESTIMATES

3.1   Growth and Reproduction of Clupeids

3.2   Production Biomass Ratios

3.3   Yield Estimates

4.   FISH PREDATION

4.1   Morphological Adaptation

4.2   Fish Gut-Contents

4.3   Predator-Prey Interactions

5.   DISCUSSION

6.   REFERENCES

Production dynamics in Lake Tanganyika, by G.W. Coulter

Abstract

1.   INTRODUCTION

1.1   Generalisations about clupeoids

2.   THE LAKE TANGANYIKA CLUPEIDS

3.   SEASONALITY IN THE LAKE ENVIRONMENT

4.   CONCLUSIONS

5.   REFERENCES

Predator-prey relationships, fisheries productivity and fish population dynamics in Lake Kariba - a review, by C. Machena

Abstract

1.   INTRODUCTION

2.   PREDATOR-PREY RELATIONSHIPS

2.1   Hydrocynus vittatus

2.2   Limnothrissa miodon

2.3   Other fish species

2.4   Piscivorous birds

3.   FISHERIES PRODUCTIVITY

3.1   Biomass estimations

3.2   Fish yields

3.2   Yield from prediction models

4.   POPULATION DYNAMICS

5.   CONCLUSION

6.   REFERENCES

A brief review of the fish stocks and dependent fisheries of Lake Malawi, by J.H. Magasa

Abstract

1.   INTRODUCTION

2.   PREDATOR-PREY RELATIONSHIPS

3.   POPULATION DYNAMICS

3.1   The Demersal Fisheries

3.2   The Pelagic Fisheries

4.   FISHERIES PRODUCTIVITY

5.   REFERENCES

Predator-prey relationship in Lake Victoria with special reference to Nile perch Lates niloticus (Linne), by James Ogari

Abstract

1.   INTRODUCTION

2.   LITERATURE REVIEW

3.   LATES NILOTICUS

3.1   Predator-prey relationships

3.2   Change in diet with water depth

3.3   Changes in feeding habits with time

4.   DISCUSSION

5.   CONCLUSION

6.   REFERENCES

Some effects of Lates spp. on pelagic and demersal fish in Zambian waters of Lake Tanganyika, by M.J. Pearce

Abstract

1.   INTRODUCTION

2.   METHODS

2.1   Pelagic Fishery

2.2   Demersal Fishery

3.   RESULTS

3.1   Pelagic Fishery

3.2   Demersal Fishery

4.   DISCUSSION

5.   ACKNOWLEDGEMENTS

6.   REFERENCES

Debut d'etude d'evaluation du stock de Limnothrissa miodon au Lac Kivu, by Marina Reusens

1.   INTRODUCTION

2.   LA PECHE ARTISANALE AU LIMNOTHRISSA

3.   ANALYSE DES STATISTIQUES DE PECHE

4.   BIOLOGIE DU LIMNOTHRISSA

5.   ESTIMATION DE LA PRODUCTION

5.1   Estimation préliminaire théorique

5.2   Estimation de la biomasse par prospection écho-acoustique

5.3   Analyse des données au stade actuel de la recherche biologique

6.   RECHERCHES FUTURES

7.   CONCLUSION

8.   REFERENCE

Predator-prey relations in northern Lake Tanganyika and fluctuations in the pelagic fish stocks, by F.C. Roest

Abstract

1.   DESCRIPTION OF THE FISHERY

1.1   Introduction

1.2   Industrial Fishery

2.   CATCH AND EFFORT DATA

3.   BIOLOGY

3.1   Summary of Relevant Data

3.2   Some Further Biological Data from Industrial Catches in Burundi

4.   SPECIES INTERACTION

5.   DISCUSSION

6.   REFERENCES

Some observations on the predatory feeding habits of Hydrocynus vittatus Castelnau in Lake Kariba, by M. Takano

Abstract

1.   INTRODUCTION

2.   MATERIALS AND METHODS

3.   RESULTS AND DISCUSSION

4.   ACKNOWLEDGEMENTS

5.   REFERENCES

Recent trends in the fisheries of Lake Kioga - Uganda, by T. Twongo

Abstract

1.   INTRODUCTION

2.   EFFECTS OF INTRODUCED FISHES

2.1   The Indigenous Fisheries

2.2   Establishment of Introduced Fishes

3.   PREDATOR-PREY RELATIONSHIPS

3.1   Predatory Fishes of Lake Kioga

3.2   Temporal Predator-Prey Relationships of Lates

3.3   Ontogenic and Other Relationships

4.   ASPECTS OF FISHERIES PRODUCTIVITY

5.   CONCLUSIONS

6.   REFERENCES

The fisheries of Lake Abaya, by Ahmen Yimam

1.   INTRODUCTION

2.   FISH PRODUCTION

3.   REFERENCES