Swartz, A. Nelson

The ex-vessel coho salmon market has been paid scant attention in the study of the salmon resources. This study is an attempt to advance an understanding of the variations of ex-vessel prices and landings during the coho season as well as between the various coastal ports where the fish is landed. This study presents an empirical analysis of the ex-vessel port markets for coho salmon in Oregon and Washington. The objectives of the study are to investigate the variation in landings and prices dur...

Peters, Gregory J.

Pacific whiting, with a maximum sustainable yield between 150,000 and 250,000 metric tons, is the largest stock of fish found off Oregon. The majority of the fish are processed into surimi. Hundreds of variables could potentially affect surimi quality (gel strength). Alternative harvesting and processing input combinations, as well as product quality attributes and their influences, were collected for the 1992-94 Pacific whiting seasons. This data was combined with other research on Pacific whit...

Reinaldo Mendiate

No description available.

Edwards, Quincy A

Thesis (M.S.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 89-91). / xii, 91 leaves, bound 29 cm

Choi, Hiu-wah., 蔡曉華.

published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

To, Wai-lun., 杜偉倫.

published_or_final_version / Biological Sciences / Doctoral / Doctor of Philosophy

Wehner, Stephen John

No description available.

Puncher, Gregory Neils <1980>

As a large and long-lived species with high economic value, restricted spawning areas and short spawning periods, the Atlantic bluefin tuna (BFT; Thunnus thynnus) is particularly susceptible to over-exploitation. Although BFT have been targeted by fisheries in the Mediterranean Sea for thousands of years, it has only been in these last decades that the exploitation rate has reached far beyond sustainable levels. An understanding of the population structure, spatial dynamics, exploitation rates a...

In 2002, at the Johannesburg World Summit on Sustainable Development (WSSD) a plan emerged to restore the approximately 60% of global fish stocks, which have been fished to the brink of destruction, to biologically sustainable levels by 2015. This plan was made in an attempt to secure greater food security for many of the world's people. However, severe Illegal Unreported and Unregulated (IUU) fishing in many of the world's fisheries makes the realisation of such a plan difficult, especially in ...

Klaer, Neil E., n/a

Data collected by Australian observers, combined with logbook data supplied by all Japanese vessels fishing in the Australian Fishing Zone were used to estimate the total seabird catch and catch rates (and associated variances) within the Australian Fishing Zone by season and area. The species composition of subsamples of captured seabirds was used in conjunction with the estimates of total by-catch to provide estimates of by-catch by species. The total by-catch of all seabird species by Japanes...

Knight, Peter David, n/a

More than a century of dredging for oysters in the Foveaux Strait has resulted in a decimated fishery. In 1999 the Parliamentary Commissioner for the Environment asked the question: Where did we go wrong? This thesis provides answers to this question by presenting information provided by the Bluff oyster fishermen. In order to gain as much exposure to the community of fishermen as possible, a cumulative period of approximately six months was spent living in the town of Bluff between 2002 and 200...

Anderson , Angelle Nicole

The blue crab (Callinectes sapidus) is a commercially, recreationally, and ecologically important species in Louisiana coastal waters. Louisiana landings account for more than 80% of Gulf of Mexico hard crab landings. In 2012, over 24 thousand metric tons of blue crab were landed in Louisiana with an economic value over $52 million. The blue crab fishery in the northern Gulf of Mexico relies heavily on Atlantic menhaden (Brevoortia tyrannus) for bait, which is a species with stock concerns resul...

Pedrozo, Raul A. F.

No description available.

Lee, Brendon.

The king mackerel, Scomberomorus commerson, is an epipelagic, schooling predator supporting significant commercial, artisanal and recreational fisheries throughout the coastal waters of its Indo-Pacific distribution. Despite the importance of the species within the South West Indian Ocean, little research has been undertaken on its biology and fisheries on a regional basis over the past 20 years. The aim of this study was to evaluate the fishery and biology of S. commerson in the South West Indi...

Jaffray, Beverley Ann

Much has been written on the theoretical implications and postulated impacts of individual transferable harvest quotas (ITHQ), but there have been few empirical studies of the development and implementation process, the impacts of this process and the impacts of ITHQ in a Great Lakes fishery. In 1984, Ontario implemented ITHQ for selected commercial fish species. The objectives of this study are: (1) to identify and understand the impacts of ITHQ; (2) to detail the linkages between these im...

Smith, Morgen Elizabeth

This thesis identifies and discusses a variety of historical, economic, and regulatory barriers to the collection of harvest data for a subsistence salmon fishery on Southeast Alaska's Chilkat River. The research on which this paper is based also elicited suggestions for improving participation in and accuracy of future harvest assessment efforts. Research was conducted using standard social science interview methodology, participant observation, and reviews of historical and regulatory doc...

Tyedmers, Peter

Technologies play a critical role in mediating the impact of the human enterprise on the ecosphere. Consequently, the adoption of more biophysically efficient technologies is essential if the sustainability of the human enterprise is to improve as populations and per capita consumption demands increase. Within this context, the biophysical efficiency of two salmon production technology systems were analysed and compared using ecological footprint and energy analysis. The two systems evaluated ar...

Desharnais, Craig

At the 1996 World Fisheries Congress, Donald A. McCaughran declared seventyfive years of regulatory success for the International Pacific Halibut Commission. The Commission's mandate was to reverse the precipitous decline in halibut stocks that had become apparent in the 1910's, and save this fishery from economic extinction. The biologists and fishermen who sat on the Commission assumed that the appropriate biological target was the one that yielded the maximum sustainable harvest. Using a...

Manfredi, Chiara <1974>

The Ecosystem Approach to Fisheries represents the most recent research line in the international context, showing interest both towards the whole community and toward the identification and protection of all the “critical habitats” in which marine resources complete their life cycles. Using data coming from trawl surveys performed in the Northern and Central Adriatic from 1996 to 2010, this study provides the first attempt to appraise the status of the whole demersal community. It took into ac...

Berruti, Aldo.

A large purse-seine fishery is located in the highly productive southern Benguela System off the western Cape. Purseseine fisheries have been prone to collapse worldwide and management practices have met with limited success. Predators offer potential as biological indicators yielding information on the status of fish stocks. The rationale behind this proposed usage was previously loosely-defined. The premise that some variable of seabird biology is related to some aspect of fish biology about w...

Godbout, Lyse

The aim of this thesis is to develop empirical models of the stable catch of brook trout in the Laurentian lakes of Quebec. Current estimators of fish yield are biased and predict poorly. / A model resulting from this study shows that catch increases with fishing effort, but that the rate of increase is smaller at higher effort. For a given effort, the catch-per-unit of effort (CPUE) is greater in larger lakes. Catch is also greater in phosphorus rich lakes and smaller in acid lakes. Catch of bi...

Kumchedwa, Brighton Kalembeni.

Fishing, and artisanal fishing in particular, plays a key role in the provision of rural employment and more importantly, household food security in the developing nations. The importance of artisanal fishery is shown in Malawi where artisanal fishery produces between 85-95% of the total fish production, and about 70% of the animal protein in human consumption comes from fish. About 43,000 people are employed directly in artisanal fisheries and approximately 100,000150,000 are indirectly employe...

Mamula, Aaron T.

This dissertation provides a thorough analysis of the costs associated with, and efficacy of, sequential license buyback auctions. I use data from the Texas Shrimp License Buyback Program - a sequential license buyback auction - to estimate the effects of a repeated game set-up on bidding behavior. I develop a dynamic econometric model to estimate parameters of the fisherman's optimal bidding function in this auction. The model incorporates the learning that occurs when an agent is able to submi...

Lindgren, Simon

This study examines the costs in terms of lost revenues inflicted upon the vendace fishing industry by increased seal predation in the Bothnian Bay between the years of 2008 and 2017. A partial bioeconomic model is used to estimate the costs of predation, where a constant stock management type is assumed. The results show that the average predation cost is approximately 4500 SEK per ringed seal and 2300 SEK per grey seal. A 10 percent increase in the ringed seal population is estimated to result...

Hamon, Katell

In the past three decades, there has been a move towards rights-based management of access to marine fisheries, especially individual transferable quotas (ITQs). Although it is generally agreed that ITQs improve the economic efficiency of fisheries, few empirical studies examined how stakeholders respond to the incentives set in an ITQ fishery, determining the actual economic, social and ecological outcomes of such a management system. This thesis addresses the question of how fishers and quota ...

Andersson, Anders

Over recent decades recreational fisheries have grown substantially throughout the world. Despite this increase, catches from recreational fisheries have often been ignored in fisheries management, although this is now being remedied. Monitoring recreational fisheries can be expensive, and the primary means used for monitoring is angler (creel) surveys, typically funded from sales of fishing licences. The studies presented in this thesis examine different approaches to monitoring recreational tr...

Kvaternik, Andre C.

No description available.

Eldridge, Peter J.

No description available.

Pariseau, Justin andrew

Bound together across lines of color and lass, Nantucket and New Bedford residents pursued the unique economic opportunities presented by whaling during the nineteenth century. Whaling was becoming a major industrial enterprise with few available options to fulfill the labor needs required for the whaling crews, ropewalks, blacksmith shops, and sail lofts that made it possible for Nantucket and New Bedford whaleships to transit the globe. Whaling thus generated the jobs that made it possible for...

Kaltayev, Arman O.

No description available.

Menzel, Winston

No description available.

Armitage, Thomas M.

A bioeconomic simulation model of the middle Atlantic surf clam (Spisula solidissima) fishery has been developed from a survey of biological and econometric relationships. While identifying the biological input parameters available in the literature, the economic submodel of the fishery has been developed with price and landings time series data, and with data obtained through the use of survey questionnaires and interviews with surf clam fishermen and processors. Alternative management scenario...

Disturbance events occur outside the normal disturbance regime of a system and can cause changes in behavior of some organisms. The 2010 cold event is an example of a disturbance event that influenced the behavior of Common Snook (Centropomus undecimalis). Common snook are euryhaline sportfish native to Florida, Texas, and the Caribbean. Florida is the northern most part of their distribution, based on the 15o C winter isotherm. They move between offshore areas during spawning season and f...

Lewin, Henry Canfield

No description available.

Parker, Charles R

<p>This thesis aimed to improve decision-maker access to economic information by testing a price-adjusting methodology to annually update expenditure information for economic impacts analyses and by conducting a trends analysis of economic sector contributions to a regional economy. A secondary data analysis of historical angler survey data generated expenditure profiles adjusted over time using price indices. A replication survey was conducted to compare expenditures. Grouping anglers by trip t...

Lamberth, Stephen Justin

Bibliography: pages 108-123. / This study was initiated in response to allegations by the conservation lobby that the commercial beach-seine fishery in False Bay was jeopardizing fish stocks and detrimentally affecting the ecology of the Bay. Its main aims were to quantify the current catch and place it in an historical perspective, to describe seasonal patterns in catches and effort and to assess the impacts of netting on juvenile fish and benthic organisms. The overall objective was to provide...

Barkman, Mats

Determining sustainable harvest strategies are of interest in order to avoid overexploitation of ecosystems. In this report the dynamics of sh populations a ected by shery is studied. The aim is to nd an optimal catch policy under which shery shall be performed in order to obtain maximum catch without the sh population facing extinction. By formulating this as an optimal control problem, Pontryagin's principle can be used in order to nd optimal harvest strategies. The numerical results show that...

Barkman, Mats

For att undvika overexploatering kravs hallbara metoder for utnyttjande av ekosystem. Har studeras hur ske paverkar dynamiken hos populationer av sk. Malet med studien ar att hitta en optimal strategi sa att fangsten maximeras under villkoret att skpopulationen ej utrotas. Med hjalp av optimal styrteori och Pontryagin's princip, kan sadana strategier erhallas. Numerisk analys av det optimala styrproblemet visade att det for oberoende skarter existerar en optimal populationsstorlek. For beroende ...

Ruusuvuori, Aino

The fishing industry is a very important source of food and will be also used in the future. Therefore it is essential to study the impact of fishery on marine mammals. Whales (cetaceans) interact with fishing vessels because the catch is easy prey for them. Cetaceans are caught everyday as bycatch and often get entangled in fishing gear. The result could be starvation, drowning or infection of the cetacean. This study focused on injuries on dorsal fins on orcas occurring in Norwegian waters. In...

Nsubuga, Yvonne Nakalo

The annual biomass of fish caught from estuaries in South Africa is currently estimated at over 24,800 tons. These estuarine fishes are caught by over 73,000 fishers, most of them recreational. Annual income derived from South Africa’s total estuarine fishery was worth approximately R430,000,000 in 1997. There is increasing concern that unless our estuarine fisheries are effectively managed, we will not be able to sustain these benefits into the future. Two factors that contribute to inadequate ...

Strasdine, Susan Anne

The primary goal of this study was to evaluate potential management options for the conch (Strombus gigas) fishery of Belize based on biological analyses of the present fishery. The specific objectives were to: 1) assess the condition of the stock; 2) estimate the possible yield of the resource; and 3) recommend viable alternatives for management. Information on population dynamics of Strombus gigas was obtained largely from the literature. A yield-per-recruit analysis was conducted to gain an u...

Sakata, Tommy Taira

There has been much discussion of the merits and limitations of area licensing, i.e., a fishery management tool which restricts fishermen to certain geographic areas, in the British Columbia," Canada, salmon fishery. To date there has been little formal evaluation of the implications of this policy tool for salmon fishery management. In the reports by Pearse (1982), Sinclair (1978) and Fleet Rationalization Committee (1982) some insights on the subject are provided, but an evaluation in terms of...

Shardlow, Thomas Frost

This investigation examined the relationship between the catch per unit of effort (c/f) of salmon anglers and salmon abundance. The relationship was determined by using simultaneous estimates of both c/f and salmon abundance (n). Salmon in their natural marine environment were observed as they approached fishing gear. The components of catch, such as the number of fish approaching, attacking and biting the lure per unit of fished effort were video recorded. Salmon abundance was estimated simulta...

Edgecombe, Roberta Marjorie

This study examines the criteria for efficient fisheries' management, and an efficient allocation of fisheries' labour in the Newfoundland inshore cod fishery. The first part of this thesis (fisheries' management) is an outline of H. Scott Gordon's theoretical model of the fisheries, which deals with the maximization of the social rent from a common property resource. An additional section has been included on the applicability of Gordon's model to the Newfoundland case. This was found necess...

Huberman, Gur

A global portrait of the phase plane is obtained for any acceptable values of the parameters. 3 different structures of the phase plane are recovered. The first predicts an eventual collapse of the fishery. The second predicts an unstable limit cycle and an eventual stability of solutions which start inside the limit cycle. The last structure predicts 2 possible stable equilibria, one with high catch rate, and the other one with no catch. Each structure corresponds to a different domain in the p...

Roberts, Richard Frederick Anthony

The production functions commonly suggested in the fishery bio-economic literature are reviewed, and modifications are suggested to take into account direct and indirect gear externalities and gear saturation effects in a salmon gillnet fishery. This suggests a daily production function of the Cobb-Douglas variety, tested on Skeena River sockeye salmon data. Using the daily production function, a seasonal model is developed, which reflects the intra-seasonal peaking nature of the run, and the m...

Duggan, Gregory L

Includes bibliographical references. / Emerging from seven months of ethnographic fieldwork and participant observation conducted in the small-scale commercial handline fishery of Stilbaai, this dissertation examines and rethinks knowledges in a bid to open dialogue between experts (academic researchers, fisheries managers and fishers). The field research for this work was conducted in two intensive ethnographic fieldwork trips of four months and three months respectively between early 2010 and ...

Devenish, Paul Gregory

This dissertation details the design of a fish processing and distribution building in the Fishery Port of Maputo. The ‘port’ is explored as a threshold between a city and the ocean and the perceived spatial permanence of city form is brought into dialogue with the constantly changing forces of the harbour across this threshold. The cyclic fluidity of civic life mediates this dialogue to achieve an architecture conscious and manifest of the temporal. / Dissertation (MArch(Prof))--University of P...

Heistein, Pierre

This paper focuses on the hake fishery and investigates to what extent the fishery has been transformed. It then discusses the institutional structure and incentive schemes in the fishery and evaluates the economic, social, and environmental impacts of quota redistribution.

Rollinson, Dominic Paul

Seabirds are considered one of the most threatened groups of birds in the world. They face additional mortality both on their breeding islands from introduced predators and at sea by fishing fleets, as fisheries bycatch, as well as other human impacts. Seabird bycatch has negatively affected many seabird populations worldwide, with trawl, gillnet and longline fisheries considered the most destructive to seabird populations. Seabird bycatch from trawl and gillnet fisheries has been significantly ...