Determination of optimal harvesting strategies for the hake
trawl and longline fisheries in Namibia and South Africa
Funding Agency:
United Nations Office of Operations
Contractor (Principal Investigator):
Fisheries Economics Research Unit, Fisheries Centre, University
of British Columbia, (Ussif Rashid Sumaila)
Partner Institutions:
1. Department of Natural Resources and Conservation, University
of Namibia (UNAM), Windhoek (Kevin Stephanus)
2. Programme for Land and Agrarian Studies (PLAAS), School of
Government, University of Western Cape (Moenieba Isaacs)
3. Centre for Environment, Fisheries and Aquaculture Science
(CEFAS), Lowestoft Laboratory (Trevor Hutton)
Project period:
2 years (November 1, 2003 to October 31, 2005)
Project objectives
The specific objective of project LMR/CF/03/07 is to determine
the optimal harvesting ratio between trawled and longlined hake
in order to extract maximum socio-economic value from these
resources, and at the same time ensure long-term sustainability
of hake stocks in the BCLME.
Context
Hake resources are major commercial fish species that straddle
geopolitical boundaries of mainly Namibia and South Africa,
and to a lesser extent Angola. They are harvested largely through
the use of bottom trawlers, and to a lesser degree longliners.
A number of features of these two vessel groups are important
to note as they will have strong implications for the study.
These are (i) longliners tend to catch large adult female hakes
as opposed to trawlers, which take medium to small sizes of
hake; (ii) longliners are able to fish in untrawlable areas;
(iii) longliners are labour-intensive at sea and produce a higher-value
product, while the trawl industry is more labour-intensive on
land, and (iv) the trawl fleet in Namibia, unlike that in South
Africa, is not homogenous - it is usually split into freezer
and wetfish trawers. These features will be taken into account
in determining the optimal sustainable harvesting ratios for
hake stocks in the BCLME.
Methodology
The method will consist of (i) data and database work, (ii)
biological/stock assessment modelling, (iii) social analysis
and socioeconomic modelling, and (iv) economic assessment and
bioeconomic modelling. All of these will be tied together in
a general interdisciplinary framework that brings together ecological,
economic and social perspectives, data and modelling techniques
to address the objectives of the call for proposal.
