A Survey of the Pelagic Fish Resources in Tunisian Waters - March 1981













Table of Contents


Reports on Surveys with the R/V Dr Fridtjof Nansen

Asgeir Aglen and Sigmund Myklevoll

Institute of Marine Research
Bergen, January 1982

“Dr. Fridtjof Nansen”

The fishery research vessel “Dr. Fridtjof Nansen” belongs to the Norwegian Agency for International Development (NORAD). It was designed and built for scientific and exploratory investigations of fishery resources of developing countries, under a joint plan with the Fisheries Department of FAO based on a funding of operation to be shared by FAO and Norway.

This electronic document has been scanned using optical character recognition (OCR) software and careful manual recorrection. Even if the quality of digitalisation is high, the FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.


Table of Contents


1. INTRODUCTION

2. EQUIPMENT AND METHODS

2.1 Vessel and equipment
2.2 Operation of the acoustic instruments
2.3 Sampling and processing of acoustic data
2.4 Sampling and processing of biological data

3. RESULTS

3.1 Cruise narrative
3.2 Hydrography
3.3 Bottom conditions
3.4 Surface observations
3.5 Distribution and abundance of pelagic fish
3.6 Demersal fish
3.7 Plankton

4. SUMMARY AND CONCLUSIONS

5. REFERENCES

Figures

Tables

ANNEX: Echo recordings at some fishing stations