A Bioeconomic Model for Management of Orange Roughy Stocks

The paper reports the results of a bioeconomic analysis of the exploitation of a recently discovered orange roughy stock located off Tasmania. The parameters of the model are based on the experience derived from the orange roughy fisheries in New Zealand where stocks have been heavily exploited. The model is used to predict the open-access equilibrium stock, and to calculate the stock which maximizes the net present value and the stock level consistent with the F,,, Rule. Assuming a linear approach path, the net present value of the fishery at each of these stocks is calculated. The results are used to estimate the benefit of management and the cost of a conservative stock policy. It is suggested that the results will contribute to the development of a management policy for the Tasmanian stock, and for stocks which are likely to be discovered elsewhereFishery management, bioeconomic model, orange roughy, Environmental Economics and Policy, Production Economics,

MAXIMIZING RESOURCE RENT FROM THE WESTERN AND CENTRAL PACIFIC TUNA FISHERIES

Rent generated by the tuna fisheries occurring in the waters of Pacific Islands Nations is estimated for various levels and combinations of purse-seine, pole-and-line, frozen tuna longline, and fresh tuna longline fishing effort, using a multi-species, multi-fleet bioeconomic model. The underlying population model integrates available information on the population dynamics of skipjack, yellowfin, bigeye, and Southern albacore tunas in the Pacific Ocean. The economic model utilizes the most recent data on fishing effort costs for the purse seine, pole-and-line, and longline fleets operating in the western and central Pacific Ocean, along with recent estimates of prices by species, method of capture and market, and estimates of demand elasticities. The results of the model indicate that fishery rent could be increased substantially above the current level by decreasing the size of all fleets, with the possible exception of the tuna longline fleet. The results also suggest that the countries of the region could benefit significantly by changing the level and structure of access fees levied as a percentage of total catch revenue.Resource /Energy Economics and Policy,

Technology applications team Final report, 15 Jun. 1969 - 14 Jun. 1970

Experimental procedures and applications in technology transfe

Technology applications team Quarterly progress report, 1 Jan. - 31 Mar. 1970

Aerospace technology transfer to coal mine safety, police and fireman aids, and water pollution monitorin

Noticing for Equity to Sustain Multilingual Literacies

This department explores how teachers can sustain students’ multilingual literacies and reimagine literacy learning across multiple contexts in conversation with researchers, practitioners, and communities

Development of a Constructivist Model for Teacher Inservice.

In this paper, we consider a model for teacher inservice that is informed by constructlvlsm. Initially, we consider the criteria for identifying conceptual change, briefly examine research on the roles which teachers engage in when implementing innovations, and describing different knowledge bases needed m usmg teaching approaches informed by constructivist referents. Secondly, we describe an inservice programme for science teachers in one high school, and thirdly show how a five-stage model to introduce teaching/learning approaches informed by constructivism was developed

COMBATING HEGEMONIC DISCOURSE IN AN ONLINE MULTICULTURAL LEADERSHIP COURSE: A NARRATIVE STUDY OF AN INSTRUCTOR AND STUDENT WORKING AT TANDEM FOR SOCIAL JUSTICE

This narrative study examines hegemonic discourse in an online multicultural leadership course by translating e-narrative analysis findings into implications for social justice and recommendations for andragogical strategies. These strategies specifically address hegemonic discourse within an online educational environment. The setting for this article is a graduate level class in Multicultural Leadership geared toward Masters’ students in an educational leadership program. Through the e-narrative analysis, four themes emerged that characterized the hegemonic discourse: rejecting social justice; wooing white privilege; he oppressive “other,” and telling it straight. Based on the findings and implications surrounding the research questions, four andragogical strategies were recommended: engaging in moral conversations; adopting bilateral teaching tools; strategizing for collaborative alliances; and enabling emblematic change

Adult Phyllostomid (Bat) Enamel by Scanning Electron Microscopy - With a Note on Dermopteran Enamel

This study assesses the enamel of five phyllostomids of differing feeding habits; only one example of the microchiropteran super-family Phyllostomoidae having previously been studied by SEM. A dermopteran was also examined to ascertain whether the enamel might reveal insectivore, chiropteran or primate characteristics. The five phyllostomids were found to display the additional crystallite discontinuity feature (minor boundary plane or seam) which is a major characteristic of all the bats we have so far examined with the exception of two megachiropterans. The enamel of the four fruit and nectar feeders (Phyllostomus, Carollia, Glossophaga and Artibeus) is essentially similar and different to that of the blood feeder (Desmodus). The differentiating factor for the two groups is the poor degree of prism development in Desmodus; the prisms being restricted to the inner two thirds of the enamel over the cusps or sectorial ridge, and lacking in the greater part of the axial and the sulcular enamel. The poor prism development in the vampire bat raises interesting questions from both an ontological and a phylogenetic point of view. The dermopteran (Cynocephalus sp.) displays horse-shoe shaped prisms with associated minor boundary planes (seams); an appearance entirely similar to those microchiroptera we have examined. This finding could be advanced as evidence for a close phylogenetic relationship between the Dermoptera and Chiroptera as these features are not found to the same extent in insectivores or in primates; the other two orders to which dermopterans are assigned. The evolutionary significance of the seam feature is being studied further; it is very likely to be of importance in unravelling the history of mammalian enamel