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Creator:: Doole, Graeme J. and Alexander, Robert R.
Abstract:: 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...
Resource Type:: Research Paper
Full Text:: , Massey University, Private Bag 11 222, Palmerston North, New Zealand ROBERT R. ALEXANDER Department of

Creator:: Keithly, Walter, Diop, Hamady, and Kazmierczak, Richard F.
Abstract:: It is well known that world production of shrimp, particularly farm-raised product, has increased significantly since the early-to-mid 1980's and that much of the product is directed to the U.S. market. Less well known is the fact that the product composition of the U.S. imported product (e.g., headless shell-on, peeled)...
Resource Type:: Research Paper
Full Text:: INDUSTRY Walter R. Keithly, Jr., Louisiana State University, walterk@lsu.edu Hamady Diop, Louisiana

Creator:: Diop, Hamady, Keithly, Walter R., and Kazmierczak, Richard F.
Abstract:: Theory suggests that fishing effort would be allocated among various fishing grounds such that profit levels would be equal. Homogeneity among fishers as well as perfect information is assumed and profits are opportunistically increased by changing fishing locations. These assumptions have been shown empirically ins some single fisheries where fishers...
Resource Type:: Research Paper
Full Text:: Hamady Diop, Louisiana State University, hdiop1@lsu.edu Walter R. Keithly, Jr., Louisiana State

Creator:: Ulrich, Clara, Dolder, Paul, Hoff, Ayoe, Kempf, Alexander, Poos, Jan-Jaap, Rindorf, Anna, and Vermard, Youen
Abstract:: 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...
Resource Type:: Presentation
Full Text:: Paul Dolder (UK), Ayoe Hoff (DK), Alexander Kempf (GE), Jan-Jaap Poos (NL), Anna Rindorf (DK), Youen

Creator:: Schrank, William E.
Abstract:: Fisheries is not the only discipline where models have been used in attempts to fine tune an aspect of the economy. Such fine tuning can prove ineffective because of the uncertainties in the scientific underpinnings of the models and because of the omission of critical elements. In fisheries, the biological...
Resource Type:: Research Paper
Full Text:: Portsmouth Proceedings 1 IS THERE HOPE FOR FISHERIES MANAGEMENT? William E. Schrank Professor

Creator:: Nauen, Cornelia E., Christensen, Villy, Failler, Pierre, Opitz, Silvia, and Thatje, Sven
Abstract:: ICES – the International Council for the Exploration of the Sea – was founded more than a century ago out of concern for overfishing. However, today’s global marine ecosystems are for the most part in a degraded state, many alarmingly so. Why is the science used so little to make...
Resource Type:: Research Paper
Full Text:: RESEARCH COOPERATION Cornelia E. Nauen, European Commission, DG Research, International S&T Cooperation

Creator:: Christensen, Villy, Villanueva, Maria Concepcion, and Aiken, Karl A.
Abstract:: The wide expanse of the sea, the inter-linkages among, and the productivity of its resources have until recently led most researchers to consider it unrealistic that humans could have more than local impact on marine ecosystems and their biodiversity. This perception is changing, however, as more evidence of the scale...
Resource Type:: Research Paper
Full Text:: fisheries, ecosystem and environmental impact factors (Christensen and Walters, 2005). An example of this

Creator:: Marsden, A. Dale, Sumaila, U. Rashid, and Martell, Steven J. D.
Abstract:: Many Fraser River sockeye salmon stocks show large cycles in abundance from year to year, but the causes of these cycles are not clear. As a result, these stocks have historically been managed under the hypothesis of cyclic dominance, i.e., maintaining the cyclic behaviour of the stocks. Biological studies and...
Resource Type:: Research Paper
Full Text:: perspective. We extend an analysis conducted by Walters, Martell and Hilborn [9], who evaluated

Creator:: Rust, Steven, Yamazaki, Satoshi, and Jennings, Sarah
Abstract:: Overcapacity remains a major issue in world fisheries. The specific conditions that give rise to overcapacity in the pure open access fishery remain unclear, however the non‑malleability of capital is widely regarded as a necessary condition for the accumulation of excess harvesting capacity. In the process of fisheries collapse known...
Resource Type:: Presentation
Full Text:: accumulation of fishing capacity (see Ludwig, Hilborn and Walters, 1993). • This capacity could represent an

Creator:: McKinlay, John P.
Abstract:: Western Australia operates a diverse enforcement and education program aimed at achieving high compliance in a wide range of commercial and recreational fisheries managed using a mix of input and output controls. Since enforcement resources are invariably insufficient to totally eliminate non-compliance with fishery rules, it is important to ensure...
Resource Type:: Research Paper
Full Text:: measures of compliance. I also examine how adaptive management (Holling 1978; Walters 1986), through

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