Index Catalog // ScholarsArchive@OSU

Creator:: Sylvia, Gil and Davis, Shannon
Abstract:: Major fishery investment has recently been implemented in West Africa as part of the World Bank's West Africa Regional Fisheries Program. To support this effort the New Partnership for Africa's Development funded development of a Seafood Bio-Economic Assessment Model. The model was initially developed for Ghana, but will accommodate other...
Resource Type:: Presentation
Full Text:: . Newport, Oregon USA and Shannon Davis The Research Group Corvallis

Creator:: Thunberg, Eric
Abstract:: After 16 years under a limited access program with effort controls, the New England groundfish fishery transitioned to a catch share management system in 2010. For much of its earlier management history issues related to fishing capacity were paramount as effort controls were increasingly restrictive to meet biological objectives. As...
Resource Type:: Presentation
Full Text::  Introduction  Management priority timeline Measures of Fleet Diversity  Richness  Shannon Index

Creator:: Carmichael, Emma
Abstract:: Managing internationally-shared fish stocks, those that migrate from one country’s coast to another is incredibly difficult and requires international cooperation. The International Commission for the Conservation of Atlantic Tunas (ICCAT) is the regulatory body responsible for managing tuna and tuna-like species in Atlantic and adjacent seas fisheries. Although ICCAT has...
Resource Type:: Presentation
Full Text:: Shannon Service, The Slate BBC Fisheries and Oceans Canada Lets talk about your ICCAT

Creator:: Holland, Daniel, Speir, Cameron, Kasperski, Steve, Agar, Juan, Crosson, Scott, Perruso, Larry, Kitts, Andrew, and DePiper, Geret
Abstract:: Many fishermen diversify their income by fishing in more than one fishery which can significantly reduce year-to-year variation in income. However, opportunities to diversify have become more limited as access to fisheries has become more restricted. The implementation of catch share systems could further reduce diversification if those who remain...
Resource Type:: Presentation
Full Text:: ) tests of changes in HHI and CV • Paired t-tests • Wilcoxon matched pairs signed rank test • Changes

Creator:: Doyen, Luc, Little, L. Rich, Pereau, Jean-Christophe, and Thébaud, Olivier
Abstract:: This paper deals with the sustainable management of a renewable resource based on individual and transferable quotas (ITQs) when agents differ in terms of harvesting costs or catchability. In a dynamic bio-economic model, we determine the conditions under which the manager of an ITQ system can achieve sustainability objectives which...
Resource Type:: Research Paper
Full Text:: dynamics A renewable resource is described by its state (e.g. biomassor density)x(t) ∈ IR at timet. When

Creator:: De Lara, Michel, Ocana, Eladio, Oliveros-Ramos, Ricardo, and Tam, Jorge
Abstract:: We define the notion of sustainable yields for ecosystem, with particular emphasis on long-run consistency between ecological and economic conflicting objectives. We provide a way to compute sustainable yields by means of a viability analysis of generic ecosystem models with harvesting. We apply our approach to a Lotka–Volterra model of...
Resource Type:: Research Paper
Full Text:: catches are thus vy andwz(measured in biomass).1 The discrete–time control system we consider is { y(t

Creator:: Doyen, Luc and Pereau, Jean-Christophe
Abstract:: This article gives insights on the complex balance between coalitions structure, resource state or dynamics and agents’ heterogeneity to avoid bio-economic collapses. A model bringing together coalition games and a viability approach is proposed to focus on the compatibility between bio-economic constraints and an exploited common stock dynamics. It is...
Resource Type:: Research Paper
Full Text:: (1987) and DeLara & Doyen (2008), the dynamics of a renewable resource stockx(t) ∈ R+ is given by x(t

Creator:: Martinet, Vincent and Thebaud, Olivier
Abstract:: There is growing recognition worldwide that the impacts of fishing on non-targeted components of marine ecosystems should be included in the assessment of fisheries sustainability. This leads to the inclusion of new constraints in evaluations of the long-term bio-economic performance of fisheries. In this paper, we analyze the implications of...
Resource Type:: Research Paper
Full Text:: ,...,A. We denote by N s(t) the abundance of species s at year t, where s=h,n respectively for Hake and

Creator:: Anderson, Lee G. and Semmens, Kathryn Alese
Abstract:: Under the reauthorized Magnuson-Stevens Act (MSRA), US fisheries management councils must specify an annual catch limit (ACL) for each managed species and institute accountability measures (AMs) to ensure that actual harvest will not cause the stock to be overfished. While the details of implementation are still being developed, a set...
Resource Type:: Research Paper
Full Text:: . OFL = Fmsy X t (1) IIFET 2008 Vietnam Proceedings 3 OFL’ = FrebuildXt in

Creator:: Calkin, David, Montgomery, Claire A., Shumaker, Nathan H., Polasky, Stephen, Arthur, Jeffrey A., and Nalle, Darek J.
Abstract:: An integrated model combining a wildlife population simulation model and timber harvest and growth models was developed to explore the tradeoffs between the likelihood of persistence of a hypothetical wildlife species and timber harvest volumes on a landscape in the Central Oregon Cascades. Simulated annealing, a heuristic optimization technique, was...
Resource Type:: Conference Proceeding
Full Text:: objective function to be maximized took the following form: 0,1 )( * t 10 1 2* 10 1 d

ScholarsArchive@OSU