Annual recruitment of the New Zealand longfin eel (Anguilla dieffenbachii) has decreased by around 75 percent since heavy levels of commercial fishing began in the early 1970s. Given the unsustainability of existing regulatory policy, a deterministic multiple-cohort bioeconomic model is developed and applied to this system to gain insight into...
When different species are caught together in mixed-fisheries but are managed under single-species management plans may lead to TACs of some species being exhausted before other. This leads to conservation and socio-economic problems in fisheries, where agreed harvest levels cannot be obtained for some stocks, while other stocks may be...
The purpose of this study is aimed at developing a simple bioeconomic model of the Namibian rock lobster fishery, with the main objective being to incorporate economics into fisheries management in order to estimate the potential economic benefits that could accrue to the fishery given efficient management. The complex nature...
The Irish Sea, being an area fairly discrete and partially isolated from adjoining fishing grounds, lends itself well to research studies. The area is fished by Ireland and the United Kingdom, with limited effort by France and Belgium, and has been known to be overfished for quite a long time....
The failure of the European Union’s Common Fisheries Policy (CFP) to develop a sustainable fishing environment for all member states is often blamed on the incompatibility of the territorial logic of national interests and the market forces of a de-territorialized European Union. Ironically, it is precisely this incompatibility that a...
The global aquaculture industry has seen dramatic growth over the last two decades, and is forecast to become increasingly important into the next century. The aquaculture output, of the African continent, however, remains low at about 4% of the total. There is a perception of failure where donor assisted projects...
This paper proposes a two-stage method to estimate a generalized Gordon-Schaefer model,
using heterogeneous fishing data in the logbook. A Cobb-Douglas production function is consistently
estimated in the first stage by means of the ‘within period estimator’. A stock index
is constructed and used to estimate the logistic growth model...
In marine resource management, spatial policy instruments, including Marine Protected Areas, are becoming increasingly important. The economic motivation for spatially explicit policy is that renewable resources generate, in addition to the conventionally recognized incentives to over-harvest in the face of insecure property rights, spatial externalities that distort the spatial distribution...
Generalised linear estimation and multi-layer perception neural network modelling techniques were applied to the Scottish trawler fleet data in order to estimate which inputs have the greatest impact on boat profits and output. Both produced comparable estimates that revealed inelastic and non-linear response to vessel power and length, negative response...