Main fishing gear in Thailand was otter board trawls. More than 70% of the total Thai fishing vessels had been using this fishing gear, as well as push net which was restricted targeting for demersal resources. Due to the 2.5 cm fine mesh size, juvenile economic species had been caught...
Poor selective gears like bottom trawlers are known to induce joint productions ie catch of several categories of fish by targeting one category in particular. Joint productions can be inter-species or intra-species. They can be retained to be sold or discarded most of the time with high mortality rates when...
Trawl cables are wire ropes which corrode under the influence of
seawater depending on fishing habits.
Information about the problem was obtained from the preceeding
work by Robert D. Malloch, and from contacts with the fishermen.
Statistical data about fishing boats and fishing habits on the Pacific
Northwest Coast are...
In 2003, an industry-financed, government-administered buyback of trawl
fishing permits and vessels took place on the US West Coast, resulting in
the retirement of about one-third of the limited-entry trawl fleet. The lack
of cost data in this fishery precludes an analysis of how the buyback has
affected profitability, but...
This paper analyzes the suitability of strong and weak sustainability assessment in the context of fisheries management. This topic is a main stream issue in the field of Ecological Economics, but its application to fisheries is rather ambiguous, although fisheries have been the focus of many pioneering studies related to...
Ben Tre, located on the Tien Delta Triangle--with a coastline of 65 km and the 20,000 km2
Exclusive Economic Zone--is one of the Mekong Delta’s 13 provinces. Given both its vast
access to coastline and the EEZ, fisheries is one of the Ben Tre’s key economic sectors. This
study specifies...
In the mid-90s the Commonwealth Scientific and Research Organisation
(CSIRO) funded a social science (economics) research trip to the Gulf of
Carpentaria. The objective of the trip was to observe and model
commercial fishing patterns in the NPF, and develop an all encompassing
model for describing fleet dynamics in the...
Mediterranean fisheries are characterized by a high diversity of fishing
strategies that can be differentiated according to a gradient from the coast
to the offshore area. Over the gradient, fleets interact through the resource.
The paper first provides a description of the fishing strategies and proposes
a typology for the...
Technological switching and re-switching has been the subject of debates within economics. Under
assumptions of malleable capital in economies with multiple sectors, the wage-rent envelope can show
multiple re-switching. The interest of technological change and switching behavior for fisheries
economists and managers stems from the fact that the control of...
Are Marine Protected Areas positive for adjacent fisheries? This is a study of the technical efficiency of small-scale trawlers in Nha Trang, Vietnam following establishment of Nha Trang Bay Marine Protected Area (NTB-MPA) that imposed a trawl ban to protect marine biodiversity and regenerate fish stocks. Data were collected through...
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...
Species associations of fifteen major commercial groundfish species in the
northeastern Pacific ocean and their spatial and temporal characteristics were studied
using Oregon bottom trawl logbook data, 1987 to 1993. Screening procedures were used
to remove questionable data from the original logbook files, which resulted in the
exclusion of information...
Pacific Northwest trawl fishermen spend an estimated $625,000 every year to replace corroded trawl cable. If the Pacific Northwest shrimp fleet is included, the yearly cost greatly exceeds one million dollars. Fishermen could save hundreds of thousands of dollars and increase the net return to the individual fisherman if they...
In this paper a data envelopment model is presented to evaluate short term investment decisions in the Dutch beam trawl and demersal fleet. We investigated how short run profit drives investment decisions and how a data envelopment analysis can be used to show what the optimal level of capital use...
Local community in the Mekong Delta is said to be “fish eating society” where 70% of their animal protein relies on fish products. The Mekong Delta contributes more than 60% of total aquaculture production and 40% of total wild fish catch of Vietnam. Among a large number of fishing boats,...
Much information biologists need to do their job comes from fishermen's logbooks. These logbook data are confidential by law. No single log record, or single skipper's log information can be made available to anyone else. What use is made of these log records, and why are they useful is a...
Petrale sole are taken commercially from Santa Barbara, California, to Hecate Strait, British Columbia. These large deep-bodied flounders are one of the major contributors to Oregon's trawl fishery, as well as those of Washington, British Columbia, and California. Only the Dover and the English soles appear in greater quantities. This...
The objective of the thesis is to present data upon which the management of the Oregon otter-trawl fishery can be based. In addition, a history of the Oregon trawl fishery is presented. A summary of gear development by many of the vessels in the Oregon fleet is presented in table...
The groundfish trawl fishery operating off the coasts of Oregon
and Washington 1985-1987 caught six major assemblages of species
which could be treated as units in developing mixed-species
management plans. Eighty-one percent of the tows observed on
commercial vessels were consistently placed in one of the assemblage
designations using three...
Despite the fact that fishing is an inherently uncertain business, risk has rarely
been formally recognized in fisheries science or management. Few fishery
management plans include any form of risk assessment and those that do focus on
minimizing risk caused by uncertainty associated with markets and environmental
conditions. Fishermen's attitudes...
Economic methodology is revisited to address issues in
fishery management, and survival analysis is suggested as an
analytical tool to solve the uncertainty problem in
evolutionary economics. Survival analysis can clarify in
statistical terms the impacts of fishery regulation and
economic and biological changes on the fisherman's final
decisions of...
Vessel disasters (e.g., vessels capsizing, sinking, grounding, burning) are the leading contributor to occupational fatalities in the U.S. commercial fishing industry. Vessel disasters are a vital area to target prevention efforts, yet it has been suggested that results produced in scientific studies are not efficiently exchanged between researchers, regulatory bodies...
The 1971 report includes catch/effort data and reviews of the major groundfish fisheries. The report also includes historic trawl fishery data of all agencies and their current market sampling techniques.
The 1970 report considers catch/effort, statuses of major fisheries, and cumulative fish tagging data. Other topics included a groundfish bibliography, international fishery problems, and the sablefish fishery. The report includes a synopsis of otter trawl regulations and their rationale as of July 1, 1970.
The 1969 report included catch/effort data, reviews of major fisheries and cumulative summaries of fish-tagging studies. Other topics considered included size limits on ling cod and sablefish. A new data exchange of computer programs was initiated. The report includes a synopsis of otter trawl regulations in effect as of July...
In addition to the standard reports on the status of major fisheries, catch/effort data, and cumulative groundfish tag recoveries, the 1968 report focused on the developing hake fishery and international fishery issues. A new agreement with the Soviet Union lessened the presence of the Soviet fishing fleet off the coast....
The 1967 report includes catch/effort data, a review of major fisheries, and data on dispersion of tagged fish. The Technical Sub-Committee made an important recommendation to rescind the winter closure of the petrale sole fishery. The Sub-Committee voiced concern about the growing presence of Soviet and Japanese fishing vessels off...
The 1966 report was concerned with catch/effort data, reports on the statuses of major fisheries, reviews of data procedures, current research and joint projects, and dispersions of tagged fish. Other matters touched on include the developing hake fishery and increased international fishing off the Washington and Oregon coasts.
The 1963 report includes status reports on important bottomfish fisheries, a review of catch/effort assessment techniques, a catalog of market sampling techniques, a summary of otter trawl regulations, and preliminary results of fish-tagging experiments.
This report includes status reports on important groundfish fisheries, summaries of recent petrale sole taggings and other tagging projects, a discussion of fishery regulations and a discussion on standardizing effort statistics.
In 1961, the Technical Sub-Committee of the International Trawl Fishing Committee considered the petrale sole fishery: regulations, statistics, a report on fish-tagging experiments, and trends for the fishery. The group also considered mesh sizes and minimum sizes regulations for all species of bottomfish, and the Russo-Japanese fishery in the Eastern...
In 1959, when the International Trawl Fishery Committee was created, its membership was made up of personnel representing fish and wildlife agencies from Oregon, Washington, California, and the Canadian government. At its first meeting in November, 1959, the Commission created the Technical Sub-Committee. The Sub-Committee was instructed to review the...
In 1987, U.S. Department of the Interior's Minerals Management Service (MMS) began a new proposed 5-Year Outer Continental Shelf (OCS) Oil and Gas Leasing Program for mid-1987 through mid-1992. Proposed OCS Lease Sale 132 (off Oregon and Washington) was included in this 5-Year Program. Under the agreement, the Oregon Department...
"Prepared for the State/Federal Dungeness Crab Management Program. May 1974." "One of the initial objectives of the State/Federal Dungeness Crab Management Program is to evaluate crab mortality caused by certain fishery practices. The areas of most concern include mortality caused by trawling, handling of softshell and sublegal crabs, lost pots...
Production planning in fish processing is heavily dependent on the raw material supply. Because of the uncertainties associated with the quantity of catch and its composition, planning for production is a difficult task. Until recently the fish processing plants in Iceland also had to accept the entire loads of fishing...
Recent emphasis on linkages between essential fish habitat and fish stock productivity has raised concerns about the management of fishing activities such as trawling, which have the potential to impact fish habitat. Knowing specifically where and how intensively trawl effort has occurred over time provides ecologists with the necessary background...
The ocean fishery is an example of a common property
resource industry. Behavior of commercial fishermen is
determined by a complex set of economic, environmental and
social factors. All of these factors contribute to the
individual fisherman's success.
Fishermen learn to cope with the variability inherent
to their occupation. Two...