A scientific knowledge gap exists with regard to how benthic habitat is affected by destructive fishing methods, such as bottom trawling, and how this impacts upon the productivity of commercial fish stocks. This
article addresses analytically the effects of destructive fishing practices of a single gear fishery on a non-renewable...
The Northern Prawn Fishery is one of the most valuable fisheries in Australia with a yearly estimated value of production of about $64mil. Nine prawn species are commercially harvested from the Northern Prawn Fishery with 80% of annual average catch represented by the banana prawn (Fenneropenaeus merguiensis) and the tiger...
This paper investigates the application of cellular automata (CA) models in bioeconomic studies involving varying biological growth and area distribution. A simple 2D continuous cellular automata (CCA) model is presented and incorporated in a fish harvest model based on standard assumptions of economic rational behaviour by individual decision makers. The...
The individual size of fish as a proxy for life-history traits and market
value displays an important, yet in bioeconomic modelling often ignored
biological and economic parameter. This raises the question if and to what
extent the consideration of a pricing related to the individual size
influences optimal harvest strategies....
The Atlantic deep sea red crab (Chaceon quinquedens) is the target of a small, directed fishery in the Northeast US, which has been managed using total allowable annual catches (TACs) at the fleet level since 2002. Although not a catch share fishery, it shares many of the same features, behaviors,...
Adoption of aquaculture, particularly among the rural poor, requires timely
and quality seed at the farmer level. In areas of Northwest Bangladesh, the
region considered most marginalised for food production, carp polyculture
has been improved through the introduction of Nile tilapia, but constrained
by under-developed seed supply. In order to...
This paper addresses to a comparative approach of long term changes in the characteristics of marine fisheries at a regional scale, in three ecosystems: up-welling, tropical and temperate. The South Moroccan
continental shelf, under the influence of the Canary current, where up-wellings take place, is the most productive part of...
The purpose of this paper is to provide a comparative index characterization of shrimp farms in Bangladesh, India and Indonesia. There has been considerable work carried out on shrimp farming in South East Asia with emphasis on biology, environmental factors, management and trade issues but much less work on the...
Research of value chains in fish industries indicates that there is great
difference in value creation of the domestic part of the value chain between
countries with underdeveloped fish industries and developed fish
industries. This comparison is founded on the authors´ research on the
value chains of Icelandic cod and...
The productivity and resilience of fisheries are subject to a multitude of dynamic and interrelated influences that arise from complex coupling of fish populations with the natural and human systems of which they are a part. With few exceptions, fisheries are managed independently, ignoring important natural and human linkages among...
The Icelandic fisheries management system has always been controversial in Iceland. In the wake of the force of the financial crisis that hit Iceland the political debate has become increasingly emotional and heated. In this debate a rational understanding of the fisheries management system‚ aims and efficiency has lacked. Previous...
Millions of people across the world, and particularly in Asia, depend on small-scale fisheries for a livelihood. Small-scale fisheries contribute in significant ways to employment, income and food security, and in many parts of the world small-scale fisheries constitute the backbone of remote, rural economies. However, several problems, within and...
Recreational fishermen quickly adjust fishing effort directed at a specific
site to variations in fishing quality. Holding all other quality parameters
constant, the functional relationship between fish abundance and the
resulting recreational fishing effort is denoted an effort response function.
This paper proposes a Cobb-Douglas utility function for the benefits...
Recent work in the domain of fisheries ecology has shown that major
changes occur in fish communities exploited by commercial fisheries.
Selective fishing pressure on the more highly valued components of fish
communities is amongst the key factors proposed to explain these changes.
Under de facto open access conditions, it...
This paper develops a count data model of target species and bycatch
production for an arbitrary number of species that handles correlation
between species and over time. The model is applied to a large observer
dataset for fishing trips taken from 1990 to 2008 for roughly 150 vessels
participating in...
Five species of marine turtles are found within the territorial waters of Vietnam, and all populations are declining. As part of a broader strategy and Action Plan, the Government of Vietnam and WWF Vietnam have launched a two-year project to: 1) document relative gear impacts, and geographic hotspots , for...
An industry group has proposed a novel mechanism for management of the multispecies groundfish fishery off the northeastern United States. Under this mechanism, individual harvesters would be allocated a budget of points, to be expended landing fish. A regulatory body will set different prices, denominated in points, for landing each...
Interest in ecosystem-based management or the ecosystem-based approach
to fisheries management has rapidly increased on a global basis. Most
options for ecosystem-based management have emphasized some type of
biological and natural conservation or non-use, and minimal attention has
been given to assessing the social and economic ramifications of
ecosystem-based management....
Throughout the Indo-Pacific region, communities are increasingly
empowered with the ability and responsibility of working with national
governments to make decisions about their marine resources. In some
instances, co-management arrangements have been successful at
conserving marine resources by developing locally appropriate rules to
limit overexploitation. These examples have often prompted...
In 1996, the US New England Fishery Management Council formed a
technical team (PDT) to develop a new plan for Atlantic Herring (Clupea
harengus harengus). The inshore stock was close to fully exploited while
the offshore stock was underexploited. There were few full-time herring
harvesters and very few processors. Fresh...
Indian Ocean Tuna fisheries after a rapid development period from
seventies to the end of the last century are faced with challenges including:
the fishing capacity control, the profitability improvement, and the
limitation of impacts on high seas biodiversity. In this area, tuna species
are exploited by coastal states as...
Marine scientists and stakeholders are increasingly advocating ecosystembased
fishery management (EBFM). However, the way to operationalize
such EBFM remains controversial. The viability approach can be a relevant
modelling framework for EBFM as it accounts for dynamic complexities,
uncertainties, risks and sustainability objectives balancing ecological,
economic and social dimensions together with...
An investigation was carried out on Lake Geriyo in the month of April to know the pattern of
fish exploitation. The fish species sampled were mainly by using canoes as they were landed at
the landing site of the lake. A total of fourteen (14) species of thirteen (13) families...
This study is part of the research program on theme Post Harvest Management Strategy of Supply Chain For Thai Shrimp Products currently supported by the Department of Fisheries (DOF) and Post Harvest Technology Institution (PHT), Chiangmai University (CMU). That focuses on the cost efficiencies of 51 shrimp processing plants under...
Molluscan shellfish culture is an important component of the commercial aquaculture industry in Florida, USA. The primary species cultured is the hard clam, Mercenaria mercenaria. Currently, annual grower revenues total approximately $15 million, which generate $40 million in economic impact to the state. However, hard clam production in other USA...
A study of Somaliland’s marine capture fisheries and markets was conducted in October 2010. The paper presents the results of the author’s assessment of the state of its marine capture fisheries and fresh fish markets and the prospects for adding value along the supply chain resulting from a 2 week...
Assessing distribution of the expected bio-economic impacts of
management measures between fleet segments is a main issue for decision
making in fisheries management. This requires as a first step a good
description of the system and of the interactions between fleets through
stocks. Making this assessment operational also needs flexible...
Worldwide, the scientific community and international organisations have
gradually agreed on the need for an ecosystem-based approach to fishery
management. However, the practical implementation of such an approach
faces huge problems, especially in developing countries where current
fishery management systems are generally weak.
One way to improve a fishery management...
Climate change is set to have far-reaching ecological and economic consequences for the African continent and globally. Developing countries are particularly vulnerable to climate change, not only as a consequence of resource and technology constraints to adapt to climate change, but also due to a greater reliance on the productive...
Over the past 30 years, fisheries management on the west coast of the United States has undergone a rapid evolution. Starting with very limited management and stock assessment techniques, the complexity of fishery models and size and breadth of fishery data sets have gradually increased, which has coincided with increasingly...
Biologists have criticized traditional biomass models in fishery economics for being oversimplified. Biological stock assessment models are more sophisticated with regard to biological content, but rarely account for economic objectives. Recently, age-structured models of fish stocks have increasingly been used in fisheries economics, but applications have so far mainly been...
Because of the stagnation of commercial landings, the development of aquaculture activities is expected to rise during the next decades to match the growing demand for fisheries goods. Overall, it is often expected that the aquaculture sector could reduce to a certain extent the pressure applied over wild stocks. However,...
Economic indicators are needed for future knowledge-based fisheries management in Vietnam. This entails a good data collecting and processing system. This paper contributes to this requirement for the tuna-mackerel gillnet fishery, near-shore and offshore, in Nha Trang, South-Central Vietnam. For 2005 and 2006 fifty vessels were surveyed for technical characteristics,...
Non-market valuation research has produced value estimates for over forty threatened and endangered (T&E) species, including mammals, fish, birds, and crustaceans. Increasingly Stated Preference Choice Experiments (SPCE) are utilized for valuation, as the format offers flexibility for policy analysis and may reduce certain types of response biases as compared to...
The Constitutional imperative in South Africa after 1994 was to build a just and equitable order that would benefit its entire people's after centuries of social and legal privilege benefited ruling minorities. In
1998 new era fisheries legislation aimed to redistribute fishing access rights and reform the sector. The challenge...
Two economic base analysis techniques that identify and measure
commercial fishery dependency at the local level are compared. The most
common method, the location quotient technique, uses direct metrics of
economic activity (sales, employment, wages, or value-added) to compare
a local economy with a reference economy. We compared this technique...
The paper is the first attempt to explore the ecological and economic impacts of genetic interaction between farmed and wild salmon over generations. An age- and stage-structured bioeconomic model is developed. The biological part of the model includes age-specific life history traits such as survival rate, fecundity, spawning success for...
According to nutrition based indicators, 50% of Indias population is
estimated to be below poverty line with inadequate nutritional intake.
Though majority of Indian population derives its nutritional requirement
from plant sources, there is a need to include animal proteins according to
nutritionists. In India, animal protein costs much more...
Concerns about declining stock and profitability in the Tasmanian rock
lobster industry led to the introduction of individual transferable quota
(ITQ) management in 1998. In this study, fisher groups were categorised
by effort and quota ownership traits to examine response to revised
management, and how profit drivers moderated this change....
The US Magnuson-Stevens Act authorizes the use of onboard observers to
monitor commercial fisheries catch and bycatch (PFMC 2003). A question
of concern in implementing an observer program is that of the appropriate
level of observer coverage. Current practice varies by fishery; for example,
the California-Oregon drift gillnet fishery for...
In many fisheries, harvesters of different scales, different gears, or on
different sides of political boundaries crossed by a single stock are
effectively managed separately. The New England Multispecies
(groundfish) fishery is about to dramatically expand the number of
management systems in place concurrently, by allocating portions of the
total...
The small scale fisheries are generally unknown over the world due to a crucial lack of data, and particularly costs and earnings data. This is also true for the European fisheries while vessels less than 12 meters represent almost 75% of the total European fleet. Faced to the increasing price...
While indicators and assessment frameworks are being developed for ecosystems, and tools for determining the economic status of a fishery are readily available, integrated assessment tools are still mostly lacking. However, the development of an ecosystem approach to fisheries management requires the monitoring and assessment of exploited ecosystems in all...
We present the outlines of an integrated economic-ecological framework
designed to help assess the implementation of the ecosystem-based
management (EBM) of fisheries in New England. We develop the
framework by linking a computable general equilibrium (CGE) model of a
coastal economy to a bottom-up model of a marine food web...
Different methodologies have been used in modeling the epidemiology and economics of aquaculture diseases, including input-output models, benefit-cost analysis, linear programming, simple spreadsheetbased models, compartment models based on differential equations, and spatial models. Despite the advantages that these models provide, there is a need to develop a more integrated approach...
In 2011 the FAO Committee on Fisheries tasked FAO with the development of an international instrument in the form of guidelines for securing sustainable small-scale fisheries (SSF Guidelines). The SSF Guidelines will facilitate the empowerment and mobilization of stakeholders to promote change towards sustainable small-scale fisheries and hence facilitate the...
In order to ensure sustainable aquaculture development basic elements needs to be taken into consideration, i.e. environmental, social and economic aspects. Most of the research focuses on the environmental aspects and very little of the social and economic aspects. There is no doubt that when dealing with sector development, socio-economic...
This research investigates the ex-vessel price flexibility of U.S. Pacific
sardine landings using a price response analytical framework. Under
perfectly competitive market conditions, we would expect to observe an
inverse relationship between the average price and the aggregate quantity
supplied. However, affiliations between U.S. Pacific sardine harvesters and
processors, as...
More than half a million small fishers in the Philippines have been availing of loans from Quedancor, the credit arm of the Department of Agriculture. The financing scheme has been quite successful with repayment rate at 95%. However, the occurrence of natural calamities such as typhoons; as well as pests...
The study examined marketing of smoked fish in Ondo State, Nigeria. It specifically examined socio-economic characteristics of the respondents, determined the profitability of smoked fish marketing and examined the market structure for smoked fish in the study area. A multistage sampling technique was used to select 84 smoked fish marketers...
Catfish production has experienced a decline in the past two years, and farmers have been blaming international competition, exports, low prices and poor feed conversion ratios as the main causes. We evaluate the usefulness of the Analytic Hierarchy Process (AHP) and the Cost Benefit Analysis (CBA) as instruments for rapid...
Acknowledging that there is stochasticity in the dynamics of a fish stock, one has a situation where the fish stock can collapse even without any fishing pressure. To derive the probability of collapse, we suggest a Monte Carlo approach because it is relatively simple model and can capture complex stock...
The central objective of fishery management is to ensure the sustainability and profitability of the resource base. The
importance of the fish stock's age-structure is increasingly recognized in economics and ecology. Still, current
policies predominately rely on the aggregate biomass. We carefully calibrate a detailed model on the North-East
Arctic...
The rapid growth in aquaculture production over the last three decades has been one of the fruits of globalisation, as tropical countries have exploited their comparative advantage in the production of high value crops like penaeid shrimp. However, aquaculture is heavily concentrated in coastal areas and it has generated important...
System approach is increasingly recommended as a logical framework for
expert advising in support of integrated coastal zone management (ICZM).
The System Approach Framework proposed by the SPICOSA project
(Science and policy integration for coastal system assessment) aims at
building integrated models, which seek to represent the ecological,
economic and...
Although considerable research is required on the impact of global climate
change on fisheries the general expectation is that climate warming in the
Arctic will improve conditions for many fish stocks. Climate warming is
taking place faster in the Arctic than elsewhere on the planet. The reduction
in sea ice...
The swordfish fishery is one of Hawaii's most lucrative, and also most highly regulated, fisheries. According to the United Fishing Agency (UFA) fish auction data in 2005, average swordfish (shallow-set)
revenue per trip was $76,897.03 and average tuna (deep-set) revenue per trip was $36,382.14. Swordfish trips, however, comprised of only...
The depletion of important fish stocks and the degradation of marine ecosystems are common problems worldwide. Two approaches that have been widely used to restore depleted fish stocks are the implementation of harvest control rules and the establishment of marine reserve networks. Harvest control rules, underpinned by the monitoring and...
The contributions of small-scale fisheries to income and employment are well recognized but not sufficiently understood. It is difficult to gauge, for instance, whether this sector is economically viable, especially in the context of large-scale economic, social, political, and ecological change processes. These knowledge deficits create an environment of uncertainty...
Artisanal fishermen are the great unknown of fisheries. Being the more
numerous segment, is the more abandoned community by managers. In a
generalized context of overcapacity and taking into account the dwindling
state of resources, the situation seems to be paradoxical since artisanal
métiers are considered to be the less...
There is a marked need to better understand the interconnectivity between poverty alleviation and environmental sustainability since impoverished communities are often dependent upon their natural habitat to meet basic needs, and strategies to improve the livelihoods of the poor must consider the role of their natural environment. While previous studies...
This paper deals with risk and uncertainties that are an inherent part of
designing and implementing fisheries rebuilding plans. Such risk and
uncertainties stem from a variety of sources, biological, economic and/or
political factors, and are influenced by external factors like changing
environmental conditions. The aim of this paper is...
Though the basic purpose of MPAs is marine ecosystem conservation, the
question of their influence on the local economy is often critical since it
governs their social acceptability. This paper addresses the problem of
measuring the consequences of creating a marine protected area (MPA) on
recreational extractive and non-extractive uses...
Is there a direct link between poverty and illegal fishing in Lake Victoria? The paper argues that presenting poverty as the main driver of illegal fishing in Lake Victoria masks core underlying causes of illegal fishing. Illegal fishing practice is a significant ecological trend in Lake Victoria. It is not...
In Peru, the fisheries are characterized by a strong fishmeal industry. The
species used for fishmeal production is mainly anchovy and also some
other small pelagic species. There is some concern that an excellent source
of food is used for a product not directly going for human consumption.
Since several...
In this paper we develop an index of economic vulnerability which we use conjointly with a more
conventional measure of income poverty to explore the different dimensions of poverty (transient, chronic, vulnerability) that affect fishing communities in developing countries. We illustrate the potential uses of this method with cross-sectoral data...
We present a scenario-model for the joint Norwegian and Russian managed capelin and cod stocks in the Barents Sea. The model basically consists of two sub models. The first is an autonomous management model which, based on profit functions and growth functions with coefficients calibrated from real data, finds a...
This research examines bargaining power in the market for Northeast
Multispecies Days-at-Sea (DAS). In 2004, the DAS system was converted
to a tradable input control system. Characteristics of the program include:
1) trading restrictions based on length and power to limit increases in
output, 2) prohibitions that limit the ability...
In this paper we develop a bidding model for fishermen participating in a
sequential permit buyback auction. A key feature of the model is a
Bayesian updating process, which allows bidders to use information gained
from past participation in future bid selection decisions. Our auction model
was based on the...
Namibia has certain very positive attributes for the development of the aquaculture sub-sector. In the last ten years great strides have been made in creating a cohesive, clear and efficient legal and regulatory environment for the development of aquaculture in Namibia. There is a necessity to exploit the conducive environment...
The lack of selectivity in many fisheries may lead to discards and bycatch. Discards of under-sized or non-commercial species/individuals represent damage to the eco-system, an additional source of overfishing and a waste of resources. Bycatch may increase fishing pressure on species targeted by other fishermen. The purpose of the paper...
The objective of this paper is to study the economic management of Eastern
Baltic cod (Gadusmorhua) under the influence of nutrient enrichment. Average
nitrogen concentration in the spawning areas during the spawning season of
cod stock is chosen to be an indicator of nutrient enrichment. The optimal cod
stock is...
The red king crab (Paralithodes camtschaticus) is an alien invasive species in the Barents Sea representing a value as well as a potential pest. A bio-economic model is applied analysing the costs that traditional fisheries incur as a result of the king crab invasion, as well as the income from...
The Ganga, one of the most important rivers of India, is considered as heaven for rich biodiversity of fisheries and economically rewarding aquatic species. An investigation looked into ecology and habitat degradation of fisheries affecting biodiversity. It has been found that more than 35 fish species commonly available in river...
Short-lived fisheries stocks are subject to large fluctuations in abundance and respond rapidly to many factors
including changes in oceanographic conditions, biological interactions and fishery exploitation. Management of
such species requires a flexible, adaptive framework that responds rapidly to a changing environment, although such
schemes are rarely operationalized. In this...
Balanced feed represents approximately 60 % of production costs in fish culture and ration size has significant effects on this parameter. Ration size varies according to culture strategies and producer knowledge. It can also have environmental implications since feed can be a pollutant. A bioeconomic model was developed for an...
This paper deals with the control of an invasive species, void of market value, and acting as a space competitor for a native valuable harvested species. The paper presents a theoretical bioeconomic model describing the interacting dynamics of the two stocks. In the model, control variables are the levels of...
Bluefin tuna capture today is focused on large fish caught by longline and smaller fish caught by purse seine for on-growing for between 3 months and 3 years. There has recently been the emergence of full life cycle farming in Japan with South Korea (Pacific bluefin tuna) and Australia (southern...
Full life cycle culture of bluefin tuna has so far been achieved only for Pacific bluefin tuna by the Japanese at Kinki University in 2002 with the first fish going on sale in Japan in 2004. More recently Japan's Okinawa fisheries laboratories have also achieved the same success, with the...
Decades of social science research has shown that fisheries, particularly small-scale, are integral to
community wellbeing. They contribute to food security, men’s, women’s, and children’s livelihoods,
health, community identity, and social cohesion. These contributions need to be well-defined and
contextualized, as well as differentiated between fishing sectors, for better fisheries...
New Zealands quota management system is based on transferable
harvesting rights operating within regulated allowable harvest limits. The
system has evolved since its implementation in 1986. One particular
challenge has been the design of mechanisms to encourage the balancing of
catch against quota. A model is developed for a target...
Individual transferable quotas (ITQs) in multispecies fisheries create incentives for fishermen to avoid bycatch of
species for which quota is scarce. However, when bycatch is highly uncertain, individual quota demand and prices
may be volatile creating substantial financial risk for fishermen. The US Pacific Groundfish fishery recently
introduced an ITQ...
Price instruments are rarely seen in fisheries despite their many desirable
properties. In this paper, I find new reasons to favor price instruments in a
fishery. Given constraints on information and enforcement precluding the
optimum optimorum, I consider a second-best but welfare improving
policy when catch limits cannot be enforced...
Recent reports of fishery collapse paint a gloomy picture of the ocean's future; perhaps 100% of fisheries from the world's large marine ecosystems (LMEs) will be collapsed in just 40 years. While poor fisheries governance is now widely regarded as the cause, bioeconomic theory and anecdotal evidence suggest that rights-based...
Since MSC certification of the Gulf of Alaska and Bering Sea pollock fisheries in the U.S., anecdotal evidence suggests that products from these fisheries have benefited in the marketplace relative to products
from the Russian pollock fishery. In particular, a testable hypothesis is that certified U.S. pollock has achieved a...
Marine protected areas (MPAs) are commonly used as a management tool to conserve marine resources. The conservation costs of MPAs are well known and often borne largely by local communities, while the benefits received by the communities are less known and more variable. Local communities become resistant to the idea...
According to the UN's Food and agicultural organisation (FAO, managing fishing capacity is a core elemnt to aceive sustainable fisheries. Here, FAO highlight the long term need to avoid unprofitable overcapacity; an adaptation which increase the pressure on fish resources, fisheres are marginalized economically, allocation conflicts among fishermen and high...
Two of the main problems in fisheries management are over-fishing and
over-capacity driven by the production externality inherent in common
property resource use. Quotas have been introduced to cap total catches,
and regulations such as input restrictions and limited entry have been used
to reduce the capacity problem. Economists generally...
The expansion of fishing capacity is one of the most pressing problems facing many fisheries around the world. Excess capacity arises when a high number of vessels enter the fishery, and these vessels are
employed to exploit the available fish stocks beyond a target level of yield. The lack or...
Disease control decisions at a sector level often reflect different types of goals and incentives between various stakeholders. While government may pursue policy objectives to eliminate disease at any cost, for example, the success of such initiatives relies on the capability and desire of industry to adopt such measures as...
Understanding how people value ecosystem goods and services can provide important information to managers and planners. Marine protected area valuations often focus on marketed goods and services. For many traditional fisherfolk, however, non-marketed ecosystem services are critically important inputs to their wellbeing. Using discrete choice experiments (DCEs), we quantify the...
In Africa at least 10 million people depend in fisheries. 90% of fish is from the continent is landed by small-scale fishers. The value of landed catch from the continent is estimated at $2.7 billion annually. In southern Africa, the main fishery resources range from inland lake and river systems...
Certification and eco-labelling programmes are widely recognised as a useful tool to bring about more effective management in fisheries. Evidence is also growing that real environmental benefits can result from these market based initiatives. Market benefits for certified fisheries range from better market access, price premiums for some products and...
The past twenty years has seen the offshore outsourcing of post-harvest
fish processing gain unprecedented momentum. The growth in offshore
processing is a further stage in an increasingly globalised fisheries value
chain. Raw material is head and gutted, then frozen, and transported to
processing sites in Asia (especially China). The...
Conservation and management of North American West Coast fisheries
encompass a broad array of issues including the economic, spatial, and
temporal relations between the coastal pelagic species live bait fishery and
the highly migratory species recreational fishery. For the better part the
century, the live bait fishery has supplied live...
One component of the Bering Sea Integrated Ecosystem Research Project
(BSIERP) is a spatial economic model that predicts changes in fishing
activity in the Bering Sea pollock fishery that may result from climate
change. Models such as the one employed here have been used in the
Bering Sea and elsewhere...