Research and management of competing small-scale and industrial fisheries: a modeling study of the shrimp fisheries in Mozambique
AuthorTorres Coll, Ricardo Javier
The shrimp fisheries in tropical areas often present interactions between the fleets that are taking part in the fishery: industrial fleet and small-scale sector. The fisheries in the Sofala bank, Mozambique, are an excellent case study of such interactions. In this study a simulation model is used to analyze different scenarios and management issues: lack of information in the fishery, catches of artisanal fleet not taken into account in stock assessments, same management measures applied to both fleets, over-crowded fishery, and interactions through catches and by-catches. Although coarse, the model appears to model appropriately some of the main characteristics of a two-fleet two-prey fishery without biological interactions. Six-management scenarios differing mostly on the extension and timing of closed seasons in the shrimp fishery were simulated, following earlier practices and recommendations from different authors. These scenarios suggest that for maximizing yield and profit in the long term a strong reduction in the trawler fleet would be most appropriate. With large fleets present, as in the late 2000’s, increased closed seasons may, or not, be beneficial for the stocks, but seem to be little economically efficient as they don’t deal with the race to fish.
PublisherUiT The Arctic University of Norway
UiT Norges arktiske universitet
MetadataShow full item record
Copyright 2013 The Author(s)
The following license file are associated with this item:
Showing items related by title, author, creator and subject.
Dyspriani, Polite (Master thesis; Mastergradsoppgave, 2007-05-29)Shrimp world production in the last few years has shown very high growth rates. It is marked by an increasing of production volume, and by shifting from capture to aquaculture fisheries within the production system. This has occurred mostly regarding to the brackish water pond. For some years, the government has had to face hard choices in order to ensure shrimp aquaculture developed sustainable. ...
Karlsen, Kine Mari (Doctoral thesis; Doktorgradsavhandling, 2011-08-26)The purpose of this thesis was to study granularity and its importance for traceability in seafood supply chains. The following hypothesis was applied in this thesis: The implementation of traceability of seafood is affected by the granularity level of the traceable units. Three sub-tasks were carried out to test the hypothesis: 1) identify critical traceability points (CTPs) of seafood products, ...
Nolde Nielsen, Kåre (Doctoral thesis; Doktorgradsavhandling, 2008-11-21)What is the relationship between science and politics? What should it be? How are their respective roles conceived and acted out in practice? Should science and politics be clearly separated? How? Are there cases in which they can be usefully mixed? What cases are those, and are there some ways of mixing that are better than others? This project explores such questions by examining relationships ...