This study used the Gordon-Schaefer model which was extended to Open Access (OA) model and Present Value Maximization (MPV) model to discuss the equilibrium levels for bigeye tuna in the Western and Central Pacific Ocean by purse seine fishery data. I compared the catches and the biomass with the two model¡¦s equilibrium value, and the result showed that the operating mode of bigeye tuna in the Western and Central Pacific Ocean tended to the MPV model, and the bigeye tuna resources were diminishing. In addition, the sensitivity analysis was used in order to understand the impact of various parameter changes on the two fisheries model¡¦s equilibrium value. In the OA model, the change of the price, the cost per unit effort and the catch coefficient would have greater impact on the equilibrium biomass. In the MPV model, the equilibrium biomass was sensitive to the change of the environmental capacity. Finally, in order to understand whether the management of the Western and Central Pacific Commission (WCPFC) was effective, I used simulation analysis in accordance with the catches restriction and effort restriction management strategies. The result showed that the catches restriction strategy which WCPFC established was still not proper enough. It must cut a large number of catches immediately and continue for some time enough to make the resource recover. The effort restriction strategy could make good effect on the bigeye tuna resource recovery.

Abstract This study used the Gordon-Schaefer model to do resource economic analysis on the South Pacific albacore fishery in 1967-2007 . Evaluated the equilibrium standard of open access model and present value maximization model, and then compared them with the real data. The results indicates that the fishing yield, resource stock, effort and catch-per-unit-effort of south Pacific albacore is close to the equilibrium level of present value maximization model after year 2002, which means the South Pacific albacore fishing is under appropriate development. Following that, this paper did sensitivity analysis to understand the impact of the changed parameters on stock size and effort. Finally, using the simulation analysis on open access model and present value maximization model. In open access model, the result shows that resources will face extinction crisis if the fishery is not controlled well. In present value maximization model, the albacore fishery would sustainable management. This result is valuable for the fishery management authorities to maintain the development of fishery and cherishing ocean resources at the same time.

This research is based on Gordon-Schaefer model, using the statistic data from the FAO between 1983 to 2007 to conduct an assessment on Argentine shortfin squid, Illex argentinus. First of all, calculate and compare the equilibrium levels of open access fishery and present value maximization fishery, then evaluate the stock size of Illex argentinus and compare the equilibrium levels of two models with the statistic readings, the result shows that Illex argentinus has no sign of depletion, but it has not yet reached the best status for development. By using sensitivity analysis,we understand the changes on the effort and stock effected by varying different parameters. Finally, by simulating the stock size of open access fishery and present value maximization fishery, we find that unrestricted developing can end up the resources, but Illex argentinus will receive sustainable development, if it can be effectively managed.

Sergestid Shrimp contains rich nutrition, regards as a high-class aquatic product in Japan. The management of the catch has come into operation, and it¡¦s led the price raising and the output value increasing rapidly when the establishment of TungKung producer organization of the Sergestid Shrimp in 1993 and it also has become the important seasonal fishery in the southwestern coast of Taiwan. This study is based on the fundamental model of fish dynamic- Gordon Schaefer Model, to discuss the equilibrium values for the optimal conduction of open access and dynamic optimization, and to do the comparative statics analysis. By applying the data provided by Fisheries Research Institute, the evaluation of the variation are under both conductions were available, and in additions, the sensitivity analysis had been done by assuming all bio-economics parameters varied within a reasonable range. The study can figure out the fact that the management of TungKang producer organization of the Sergestid Shrimp with the notion of the sustainable administration by the derivation of theoretical model and the simulate analysis of historical data, and the conclusions of analysis are consistency. Furthermore, the study discusses the fishery management policies of TungKung Sergestid Shrimp. I hope the management policies of TungKung producer organization of the Sergestid Shrimp could be popularized in the related industry.

Universiẗat, Diss.--Göttingen, 2007.

During the last years the scientific communication has undergone a series of changes. As a result new and different forms of publication and distribution of research has seen the light of day, one of these is open access. Open access as a concept was introduced in the beginning of the 21 ́st century. The aim of this bachelor thesis is to examine what ideas of open access are present in the academic libraries of Sweden. Furthermore we will look at what different roles librarians, researches and research funders are given. The theory and method chosen for this essay is based upon the critical discourse analysis of Norman Fairclough, with a focus on linguistic aspects of texts as well as the surrounding context, which the texts both influence and are influenced by. By applying linguistic tools two discourses where distinguished on a superior level, the democracy discourse and the market discourse. Between these two discourses there is a battle for hegemony. Within the two discourses there are also several internal discourses present. The internal discourses are not necessarily at odds with each other, they are rather seen as different aspects that together construct their superior discourses.

This presentation provides a basic description of open access and a very brief description of the crisis in scholarly communications which created the need for expanded access. Open access initiatives in western Canada (British Columbia, Alberta) are discussed, including institutional repository developments, the Public Knowledge Project's Open Journal Systems, and digitization projects of academic, public, and special libraries.

Usage statistics for electronic resources are needed, and highly desirable, for many reasons. It is encouraging to see the beginnings of quality, reliable usage data. This data can form the basis of economic decisions (selection and cancellation) that make a great deal of sense in the context of the individual library. However, the cumulative effects of such decisions could have serious implications for scholarly communications. For example, the journals of small research communities could easily be vulnerable to mass cancellations, and might fold. Fortunately, open access provides an alternative. The question of whether the impact of local decisions on scholarly communications as a whole should be taken into account in collection development policies is raised. The possibility that usage statistics could form the basis for a usage-based pricing system is discussed, and found to be highly inadvisable, as usage-based pricing tends to discourage usage.

The UBC Library along with many other research libraries is beginning to develop a range of publishing support services for faculty and students. This presentation focuses on new developments and open access trends in scholarly communication and publishing. It was delivered as part of a graduate seminar in the Dept of English on April 2, 2009.

Zugl.: Stuttgart, Hochsch. der Medien, Diplomarbeit, 2006