The Pelagic and Demersal Fish Resources of Oman. - Results of the R/V Dr. Fridtjof Nansen Surveys in Oman 1983 - 1984













Table of Contents


FINAL REPORT

BY

TORE STRØMME

INSTITUTE OF MARINE RESEARCH

BERGEN, NORWAY

December 1986

«Dr. Fridtjof Nansen»

The fishery research vessel «Dr. Fridtjof Nansen» belongs to the Norwegian Agency for Development Cooperation (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.

Since 1975 the vessel has carried out surveys in almost all countries surrounding the Indian Ocean (except India and some of the smaller island states). Since 1981 she has also surveyed the West African continental shelf, from Morocco to Angola.

The Institute of Marine Research, Bergen is under a subcontract with NORAD responsible for the operation of the vessel, and the various research programmes were planned and conducted jointly with the relevant fisheries research organizations in the countries concerned.

Results of the previous surveys have been reported on in a number of cruise- and progress reports under each programme.

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


INTRODUCTION

1.1 Background and objectives
1.2 Plan
1.3 The survey coverages

2. RESULTS FROM THE ACOUSTIC SURVEYS.

2.1 The Acoustic Method and its Limitations.
2.2 The Small Pelagic Fish Resources.

2.2.1 Distribution and Relative Abundance During the 1983-84 Surveys.
2.2.2 Biomass Estimates - Small Pelagic Fish
2.2.3 Results from Earlier Surveys Dr. Fridtjof Nansen.
2.2.4 Estimates of Yield of the Small Pelagic Resources.
2.2.5 Nursery Areas

2.3. Acoustic Estimates of the Demersal Resources During the 1983-84 Surveys

3. RESULTS FROM THE TRAWL SURVEYS 1983-84

3.1 The Estimates of the Demersal Resources
3.2 Comparisons with Other Estimates of the Demersal Resources.
3.3 The Catches of Demersal Fish.

3.3.1 Distribution of Abundances by Species Based on Catch Data.

3.4 Distribution of Catch and Biomass by Commercial Value.
3.5 Estimates of Yield of the Demersal Resources

4. ASPECTS OF THE BIOLOGY OF SOME DOMINATING SPECIES IN OMAN WATERS.

Trachurus indicus
Sardinella gibbosa
Sardinella longiceps
Argyrops spinifer and A. filamentosus
Lethrinus nebulosus and L. elongatus
Other Fish

5 SUMMARY AND MAIN CONCLUSIONS

6. BIBLIOGRAPHY

ANNEX I - Scientific staff

ANNEX II - Instruments and Fishing Gear

ANNEX III - Records of Fishing Operations

ANNEX IV - Results from the Length Measurements.

ANNEX V - Length Measurements (raw data).

ANNEX VI - Catch Data Sorted by Species.

ANNEX VII - Processed catch Data by Regions and by Gear, Species and Bottom Depth.

ANNEX VIII - Histrograms of Pooled Length Distributions of the Most Common Pelagic Species