REPORTS ON SURVEYS WITH THE R/V DR. FRIDTJOF NANSEN
by T. STRÆMME
A joint NORAD FAO/UNDP project
INSTITUTE OF MARINE RESEARCH
BERGEN 1983
The fishery research vessel «Dr. Fridtjof Nansen» belongs to the Norwegian Agency for International Development (NORAD) and was designed and built for scientific and exploratory investigations of fishery resources of developing countries. Its project are conducted under a joint plan with the Fisheries Department of FAO based on a funding of operation to be shared by UNDP/FAO and Norway.
The Institute of Marine Research, Bergen, is responsible for the operation of the vessel and the scientific programme under a sub-contract with NORAD and FAO.
Hydrography by J. Blindheim
Drawings by H. Kismul and S. Myklevoll
Common geographical sites referred to in the report.
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.
1.1 Background
1.2 Plan and Conduct of the Surveys
1.3 General Problems of Interpreting the Acoustic Abundance Estimates
2.1 Hydrography
2.2 Total Biomass and its Distribution Mauritania - Sierra Leone, including Total Fish Estimates off Western Sahara2.2.1 Composition of the Catches
2.2.2 Allocation of Biomass on EEZ's
2.2.3 Comparisons with Other Abundance Estimates from Cape Bojador to Sherbro Island2.3.1 Pelagic 1 group (the Clupeoids)
Engraulis encrasicolus
Sardinella aurita
Sardinella maderensis2.3.2 Pelagic 2 group (the Carangids)
Trachurus trachurus
Trachurus trecae
Decapterus rhonchus
Decapterus punctatus
3 RESULTS FROM MOROCCO SURVEY, MARCH-APRIL 1981
3.1 Fish Abundance and Distribution in the Region of Cape Bojador - Agadir
4 RESULTS FROM THE SURVEY LIBERIA - GHANA, JUNE 1981
4.1 Fish Abundance and Distribution
4.2 Allocation on EEZ's
4.3 Summary of Small Pelagic Fish Liberia to Ghana, June 1981
5 RESULTS ON TRIGGERFISH (Balistes capriscus) FROM ALL SURVEYS
5.1 Fish Distribution and Abundance
5.2 Aspects on the Biology of Balistes capriscus
ANNEX I Equipment and methods
ANNEX II Records of Fishing Operations
ANNEX III Results from the Length Measurements
ANNEX IV Length Frequency Distributions (raw data)
ANNEX V List of Species caught off West Africa from Agadir to Ghana, with reference to station numbers where caught and to catch/hour (in brackets).
ANNEX VI Further Catch Data by Region and Survey
