Journal articles on the topic 'Fishery management'
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SHEPHERD, S. A., P. MARTINEZ, M. V. TORAL-GRANDA, and G. J. EDGAR. "The Galápagos sea cucumber fishery: management improves as stocks decline." Environmental Conservation 31, no. 2 (June 2004): 102–10. http://dx.doi.org/10.1017/s0376892903001188.
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The Galápagos Islands, a world heritage region for the protection of the unique terrestrial and marine wildlife, are also home to a small human population, dependent on fisheries. There was a lucrative sea-cucumber (Stichopus fuscus) fishery in the islands, which began in 1992. After a rapid expansion in the Galápagos archipelago, the fishery has declined and now persists predominantly around the western islands. Initially, the fishery was largely illegal and uncontrollable. Subsequently, a co-management framework developed, with fisher participation. Gradually enforcement improved, apparent corruption declined, and research capacity increased. Although stock abundance surveys have been carried out annually since 1993, the paucity of background biological and fishery information does not allow rigorous stock assessment. The achievements of co-management through the participation of fishers in research and management have been: an acceptance of management controls on numbers of fishers and quotas, a reduction in conflict and increased co-operation. Persistent problems have been: weak enforcement capacity, limited funds for patrolling and research, corruption and declining stock abundance. Proposed application of precautionary principles to management, including a range of fishery indicators, may save the fishery from collapse. The principles are applicable to many other data-poor fisheries globally.
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Stephenson, Robert L., Stacey Paul, Martin A. Pastoors, Marloes Kraan, Petter Holm, Melanie Wiber, Steven Mackinson, Dorothy J. Dankel, Kate Brooks, and Ashleen Benson. "Integrating fishers’ knowledge research in science and management." ICES Journal of Marine Science 73, no. 6 (March 16, 2016): 1459–65. http://dx.doi.org/10.1093/icesjms/fsw025.
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Abstract Fishers' knowledge research (FKR) aims to enhance the use of experiential knowledge of fish harvesters in fisheries research, assessment, and management. Fishery participants are able to provide unique knowledge, and that knowledge forms an important part of “best available information” for fisheries science and management. Fishers' knowledge includes, but is much greater than, basic biological fishery information. It includes ecological, economic, social, and institutional knowledge, as well as experience and critical analysis of experiential knowledge. We suggest that FKR, which may in the past have been defined quite narrowly, be defined more broadly to include both fishery observations and fishers “experiential knowledge” provided across a spectrum of arrangements of fisher participation. FKR is part of the new and different information required in evolving “ecosystem-based” and “integrated” management approaches. FKR is a necessary element in the integration of ecological, economic, social, and institutional considerations of future management. Fishers' knowledge may be added to traditional assessment with appropriate analysis and explicit recognition of the intended use of the information, but fishers' knowledge is best implemented in a participatory process designed to receive and use it. Co-generation of knowledge in appropriately designed processes facilitates development and use of fishers' knowledge and facilitates the participation of fishers in assessment and management, and is suggested as best practice in improved fisheries governance.
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Emery, Timothy J., John Tisdell, Bridget S. Green, Klaas Hartmann, Caleb Gardner, and Rafael León. "Experimental analysis of the use of fishery closures and cooperatives to reduce economic rent dissipation caused by assignment problems." ICES Journal of Marine Science 72, no. 9 (August 18, 2015): 2650–62. http://dx.doi.org/10.1093/icesjms/fsv148.
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Abstract Assignment problems in quota-managed fisheries are caused by spatial and temporal heterogeneity in the productivity of the stock. If the quota management system is not fully delineated (e.g. harvest rights assigned to particular areas) then fishers will compete with each other and overexploit parts of the fishery where or when the quota unit value is highest (i.e. fishing costs low and/or market price high), leading to economic rent dissipation. This study used experimental economics to assess the effectiveness of fishery temporal closures and income-sharing fishery cooperatives in resolving assignment problems across three different fisheries with varying levels of fisher heterogeneity (i.e. numbers of quota owners and lease quota fishers). While most fisheries were successful in reducing economic rent dissipation under the fishery closure management structure relative to their baseline(s), fisheries characterized by a greater number of lease quota fishers were less effective. This was due to the differential values that lease quota fishers place on the resource relative to quota owners, due to having insecurity of tenure and diminished wealth in having to bid for a quota package and pay for it using their revenue from fishing. Conversely, income-sharing fishery cooperatives were equally successful across all three fisheries in reducing assignment problems relative to their baseline(s). This was because income-sharing created an incentive to coordinate fishing effort, particularly among heterogeneous groups. While requiring further exposition in the field, these experimental results represent a first step in identifying management institutions that may assist fishers under quota management to resolve assignment problems in a dynamic environment.
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Obregón, Clara, James R. Tweedley, Neil R. Loneragan, and Michael Hughes. "Different but not opposed: perceptions between fishing sectors on the status and management of a crab fishery." ICES Journal of Marine Science 77, no. 6 (December 5, 2019): 2354–68. http://dx.doi.org/10.1093/icesjms/fsz225.
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Abstract Fisher perceptions are a useful source of information that allows changes in stocks to be detected quickly and indicate the social acceptability of different management regulations. Yet traditionally, such information is rarely employed when developing management approaches. Face-to-face interviews were used to elicit recreational and commercial fishers’ perceptions of a crab (Portunus armatus) fishery in three south-western Australian estuaries. Differences in the perceived changes in the average size of crabs and fishing effort, reported concerns and supported solutions were detected among the recreational fishers utilizing the three estuaries and between recreational and commercial fishers in the Peel-Harvey Estuary. However, some common views were expressed by recreational and commercial fishers, with both sectors stating concerns over recreational fisher compliance and increased fishing and environmental pressures. While both sectors believed that reducing fishing and increasing compliance would benefit crab stocks, the mechanisms for achieving this differed. Recreational fishers favoured increasing the length of the seasonal closure, while commercial fishers favoured the introduction of a recreational shore-based fishing licence. These findings suggest that sector- and estuary-specific management rules may better facilitate the amelioration of pressures affecting individual estuaries and could contribute towards a more socially and biologically sustainable fishery.
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Hobday, Alistair J., Jason R. Hartog, Claire M. Spillman, and Oscar Alves. "Seasonal forecasting of tuna habitat for dynamic spatial management." Canadian Journal of Fisheries and Aquatic Sciences 68, no. 5 (May 2011): 898–911. http://dx.doi.org/10.1139/f2011-031.
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Capture of the target, bycatch, and protected species in fisheries is often regulated through spatial measures that partition fishing effort, including areal closures. In eastern Australian waters, southern bluefin tuna (SBT, Thunnus maccoyii ) are a quota-limited species in a multispecies longline fishery; minimizing capture by nonquota holders is an important management concern. A habitat preference model (conditioned with electronic tag data) coupled with ocean reanalysis data has been used since 2003 to generate real-time predicted maps of SBT distribution (nowcasts). These maps are used by fishery managers to restrict fisher access to areas with high predicted SBT distribution. Here we use the coupled ocean–atmosphere model, POAMA (predictive ocean atmosphere model for Australia), and a habitat model to forecast SBT distribution at lead times of up to 4 months. These forecasts are comparable with nowcasts derived from the operational system, and show skill in predicting SBT habitat boundaries out to lead-times of 3–4 months. For this fishery, seasonal forecasts can provide managers and fishers with valuable insights into future habitat distributions for the upcoming months, to better inform operational decisions.
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Sheridan, Peter F., and J. L. McHugh. "Fishery Management." Estuaries 9, no. 1 (March 1986): 81. http://dx.doi.org/10.2307/1352196.
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Holland, Daniel S. "Collective Rights–Based Fishery Management: A Path to Ecosystem-Based Fishery Management." Annual Review of Resource Economics 10, no. 1 (October 5, 2018): 469–85. http://dx.doi.org/10.1146/annurev-resource-100517-023110.
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Fishery rents may be dissipated across margins not well defined or controlled by an individual transferable quota system. Collective rights–based fishery management (CRBFM), where catch rights are held by a group, can sometimes generate greater benefits and can also address external impacts of the fishery. I discuss potential failures of individual quotas and how these problems were addressed by CRBFM institutions. I then focus on the role of CRBFM in addressing environmental and social impacts external to the group of fishers, such as bycatch, habitat impacts, and spatial conflicts. The review suggests that CRBFM can effectively address both intrafishery and external impacts, provided there is sufficient incentive to do so, including maintaining access to preferred markets or the threat of further regulation. However, CRBFM can create moral hazard and adverse selection problems, and successful CRBFM institutions generally have homogeneous membership with well-aligned interests and/or formal contracts with monitoring and enforcement provisions.
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Shephard, Samuel, Paul Connolly, Nils-Roar Hareide, and Emer Rogan. "Establishing stakeholder connections for management of the Irish orange roughy fishery." ICES Journal of Marine Science 64, no. 4 (December 19, 2006): 841–45. http://dx.doi.org/10.1093/icesjms/fsl034.
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Abstract S. Shephard, P. Connolly, N.-R. Hareide, and E. Rogan. 2007. Establishing stakeholder connections for management of the Irish orange roughy fishery. – ICES Journal of Marine Science, 64: 841–845. In 2000, an Irish fishery for orange roughy commenced in ICES Subarea VII. Landings peaked at >5000 t in 2002, but the fishery was largely closed from January 2005 because of concern about unsustainable fishing and the negative effects on deepwater sharks and coral. A multidimensional project was initiated in 2003 to investigate the fishery system and to develop a management plan. The project emphasized the establishment of productive relationships with stakeholders, particularly fishers. We describe and evaluate the process by which such linkages were developed successfully. Informal discussion with fishers produced experiential knowledge that described fishery development and fishing strategies, and informed subsequent scientific data collection. Strengthening relationships permitted access to commercial fishing trips and cooperation in research. An atmosphere developed in which management options could be debated in both wheelhouse and boardroom. Eventually, a formal research/stock assessment survey took place in which fishers, agencies, and deepwater coral ecologists cooperated.
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Bernos, Thaïs A., Clodio Travouck, Naly Ramasinoro, Dylan J. Fraser, and Barbara Mathevon. "What can be learned from fishers’ perceptions for fishery management planning? Case study insights from Sainte-Marie, Madagascar." PLOS ONE 16, no. 11 (November 15, 2021): e0259792. http://dx.doi.org/10.1371/journal.pone.0259792.
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Local support is critical to the success and longevity of fishery management initiatives. Previous research suggests that how resource users perceive ecological changes, explain them, and cope with them, influences local support. The objectives of this study were two-fold. First, we collated local fishers’ knowledge to characterize the long-term socio-ecological dynamics of the small-scale fishery of Sainte-Marie Island, in Madagascar. Second, we empirically assessed the individual- and site-level factors influencing support for fishery restrictions. Our results indicate that fishers observed a decline in fish abundance and catch sizes, especially in nearshore areas; many also perceived a reduction in fish sizes and the local disappearance of species. To maintain their catches, most fishers adapted by fishing harder and further offshore. Accordingly, fishers identified increased fishing effort (number of fishers and gear evolution) as the main cause of fishery changes. Collectively, our results highlight that the transition from a subsistence to commercial fishery, and resulting changes in the relationship between people and the fisheries, was an underlying driver of fishery changes. Additionally, we found that gender, membership to local associations, coping mechanisms, and perceptions of ecological health, were all interlinked and significantly associated with conservation-oriented attitudes. Conservation-oriented attitudes, however, were not associated with fishers’ willingness to decrease fishing. In the short-term, area-based restrictions could contribute to building support for conservation. In the long-term, addressing the underlying causes of the decline will necessitate collaborations among the various groups involved to progressively build livelihood flexibility. Collectively, our study provides additional insights on the individual- and site-level factors influencing support for fishery restrictions. It also highlights the importance of dialoguing with fishers to ensure that fishery management plans are adapted to the local context.
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Nunoo, F. K. E. "Achieving sustainable fisheries management: A critical look at traditional fisheries management in the marine artisanal fisheries of Ghana, West Africa." Journal of Energy and Natural Resource Management 2, no. 1 (February 21, 2018): 15–23. http://dx.doi.org/10.26796/jenrm.v2i0.40.
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Sustaining fishery resources is crucial to the survival and wealth of artisanal fishers in Ghana. The artisanal fisheries sector ofGhana provides food, employment, livelihood support and socio-economic benefits to the Ghanaian economy. Fishery resourcesof Ghana are under stress from population pressure, increasing demand of fish and fishery products and open-access regime.Formal fisheries management practices have not yielded the desired results. There is an increasing need for traditional fisheriespractices to be incorporated into formal fisheries management practices. The aim of this paper is to conduct an in-depth studyon traditional marine fisheries management systems in Ghana in order to provide information to enhance the management of theartisanal fisheries.Data was collected through document analysis (between May 2014 and January 2015), field observation andquestionnaire-based interview (between 26th and 30th of July 2014). Results show that the Chief Fisherman and CommunityBased Fisheries Management Committee are important structures in the fisheries management system of Ghana. The ChiefFisherman is the person that leads resolution of disputes and gives access to fishing in the communities. There are a number ofmeasures such as non-fishing days, ban on landing certain fish species during festival periods to prevent overfishing. Taboos andcultural practices such as performing of rituals to ‘sea gods’ and consulting of oracles during certain periods of the year help tomanage the fish stocks. With respect to the performance of the fishing communities, Elmina performed better with combinationof various traditional practices to prevent overfishing. Fishers in Elmina also had adequate knowledge of current fishing rulesand regulations than fishers in Adina, Chorkor and Dixcove. Fishers and fishing communities must be educated on the need toavoid unapproved fishing practices to help keep the fishery resources healthy for sustainable exploitation. Fishers should also beequipped with alternative livelihood jobs in order to reduce the pressure on the fishery resources. A national policy to integratetraditional management practices into formal fisheries management plans should be established.
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Saul, Steven, Elizabeth N. Brooks, and David Die. "How fisher behavior can bias stock assessment: insights from an agent-based modeling approach." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 11 (November 2020): 1794–809. http://dx.doi.org/10.1139/cjfas-2019-0025.
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During stock assessment, fishery-dependent observations are often used to develop indices of abundance or biomass from catch per unit of effort (CPUE) and contribute catch at size or age information. However, fisher behavior, rather than scientific sampling protocols, determines the spatial and temporal locations of fishery-dependent observations. As a result, trends from fishery-dependent data may be a function of fishing activity rather than fish population changes. This study evaluates whether data collected from commercial fishing fleets in the Gulf of Mexico are representative of trends in fish population size. A coupled bioeconomic agent-based model was developed to generate simulated fishery data, which were used to populate an age-structured stock assessment. Comparison of stock assessment results with simulated fish population dynamics showed that management advice from assessment models based on fishery-dependent data could be biased. Assessment of fish with small home ranges harvested by fishing fleets that frequent the same fishing grounds could cause overestimation of fishing mortality. Not accounting for the spatial structure of the fishers or fish can cause biased estimates of population status.
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Stevenson, Todd C., Brian N. Tissot, and Jan Dierking. "Fisher behaviour influences catch productivity and selectivity in West Hawaii's aquarium fishery." ICES Journal of Marine Science 68, no. 5 (May 1, 2011): 813–22. http://dx.doi.org/10.1093/icesjms/fsr020.
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Abstract Stevenson, T. C., Tissot, B. N., and Dierking, J. 2011. Fisher behaviour influences catch productivity and selectivity in West Hawaii's aquarium fishery. – ICES Journal of Marine Science, 68: 813–822. In 1999, marine protected areas (MPAs) were implemented along the west coast of the Big Island of Hawaii, closing ∼35% of the coastline to aquarium fishing. Catch per unit effort and total catch of the most commonly targeted fish, yellow tang (Zebrasoma flavescens), have increased since the implementation of the MPAs, yet its abundance has declined by 45% in areas open to aquarium fishing between 1999 and 2007. How effort allocation, harvesting efficiencies, and job satisfaction influence catch productivity and selectivity in West Hawaii's aquarium fishery are investigated, and how these dynamics explain the discrepancy between catch rates and relative abundance for yellow tang is discussed. Cross-sectional fisher questionnaires, semi-structured fisher interviews, and in situ and ex situ catch analyses were performed. The results indicate that fishers dive deeper when reef fish recruitment is perceived as weak, increase harvest efficiency with larger fishing teams, and intensively harvest “coral-friendly” reef fish to supply the global aquarium fish trade. Experienced fishers were less likely to exit the fishery, and job satisfaction was high despite declining fish stocks. These findings may help explain harvesting efficiencies and fleet investment, underscore the importance for evaluating fisher behaviours, and have potential management implications for other aquarium fisheries.
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Uchida, Hirotsugu. "TURFs, collective fishery management, and fishery cooperatives." Bulletin of Marine Science 93, no. 1 (January 1, 2017): 83–99. http://dx.doi.org/10.5343/bms.2015-1102.
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HEDGECOCK, D. "Fishery Biology: Population Genetics and Fishery Management." Science 237, no. 4819 (September 4, 1987): 1236. http://dx.doi.org/10.1126/science.237.4819.1236.
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Rodin, E. Y. "Optimal fishery management." Mathematical and Computer Modelling 12, no. 3 (1989): 383–88. http://dx.doi.org/10.1016/0895-7177(89)90127-1.
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Abernethy, Kirsten E., Edward H. Allison, Philip P. Molloy, and Isabelle M. Côté. "Why do fishers fish where they fish? Using the ideal free distribution to understand the behaviour of artisanal reef fishers." Canadian Journal of Fisheries and Aquatic Sciences 64, no. 11 (November 1, 2007): 1595–604. http://dx.doi.org/10.1139/f07-125.
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We used the theory of the ideal free distribution (IFD) as a framework to understand the mechanisms underlying fishing site selection by Anguillian artisanal fishers exploiting shallow-water coral reefs. Contrary to the predictions of IFD, fishers did not distribute themselves so that average reward was equal among fishers using different fishing methods or among fishers using the same method. In addition, fishing pressure did not increase with resource availability. Key assumptions of the IFD were not met. The distribution of Anguillian fishers was not "ideal" because lack of knowledge prevented fishers from choosing fishing grounds with the greatest rewards. Not all fishers sought to maximise profit. In addition, all fishers were not "free" to distribute themselves among reefs owing to variation in social, economic, and physical characteristics of fishers that constrained fisher movements and ability to extract resources. This study shows that as a null model the IFD is useful to frame studies designed to gain detailed insights into the complexity and dynamics of a small-scale fishery. Alongside ecological data, this framework may inform efficient and effective development of reef and fishery management practice.
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Léopold, Marc, Nicolas Guillemot, Delphine Rocklin, and Cheryl Chen. "A framework for mapping small-scale coastal fisheries using fishers' knowledge." ICES Journal of Marine Science 71, no. 7 (January 11, 2014): 1781–92. http://dx.doi.org/10.1093/icesjms/fst204.
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Abstract Collecting spatial information on fisheries catch and effort is essential to understanding the spatial processes of exploited population dynamics and to manage heterogeneously distributed resources and uses. The use of fishers' knowledge through geographical information systems (GISs) is increasingly considered as a promising source of local information on small-scale coastal fisheries. In this paper we describe the first framework for mapping entire small-scale coastal fisheries using fishers' knowledge on catch size and fishing effort. Four mangrove and coral reef fisheries targeting invertebrates or finfish in New Caledonia (southwest Pacific) were mapped following a five-step framework: (i) stratified random sampling of regular fishers; (ii) collection of fishers' knowledge of fishing areas, fishing effort, and catch size through map-based interviews; (iii) data integration into a spatial geodatabase; (iv) statistical extrapolation of fisher data to the fishery scale; and (v) mapping of catch, effort, and catch per unit effort (CPUE) for each fishery using a GIS overlay procedure. We found evidence that fishers' knowledge supplied precise and accurate quantitative and spatial information on catch size, fishing effort and CPUE for entire fisheries. Fisheries maps captured the fine-scale spatial distribution of fishing activities in a variety of ways according to target taxa, gear type, and home ports. Applications include area-based marine conservation planning and fishery monitoring, management, and governance. This integrated framework can be generalized to a large range of data-poor coastal and inland small-scale fisheries.
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Haambiya, L., H. Mussa, and M. Mulumpwa. "A review on the use of Information Communication Technology (ICT) in fisheries management: A case of Mbenji island small-scale fishery in Malawi." African Journal of Food, Agriculture, Nutrition and Development 20, no. 07 (December 18, 2020): 17113–24. http://dx.doi.org/10.18697/ajfand.95.18195.
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Fisheries management has evolved in Malawi from a traditional system to a centralized regime and lately to co-management fisheries systems, although, success stories about sustainability of the fishery resources are few. Open access nature of fisheries resources has posed a challenge to management regimes. Resource over exploitation has continued in a majority of fisheries worsened by large stretches of the shoreline manned by a single fisheries field staff, and limited capacity by DoF to monitor and manage the fishery. However, isolated localities have upheld management styles that have facilitated sustainable exploitation. Mbenji Island fishery ‘managers’ have ensured high compliance to fisheries rules and regulations among fishers through strict enforcement and maintained abundant fish stocks amid visibly declining levels of fish in vast localities of Lake Malawi and other water bodies in Malawi. There is,therefore, need to take the Mbenji Island success story to other fishing communities to learn from their fisheries management strategies. Information Communication Technology (ICT) as a powerful means in mobilizing communities to take charge of their own development should support ‘best practices’ and offer fishing communities access to the same type of services and advantages. If appropriately applied,ICT can provide for real-time monitoring of fisheries resources as fishers alarm law enforcers to move in at appropriate times. Fishers also strike deals on mobile phones for the day's catch even before landing at shore. This reduces post-harvest waste from delayed handling of fish. Computers have been used for data management, storage and analysis as well as accessing internet services. Studies have shown commonalities in fisher communities in terms of socio-economic and cultural characteristics. On the basis of such an advantage, more could be shared among such communities. Management success can be adopted by other communities of fishers through use of ICT such as radio programs (supplemented by phone-in sessions) undertaken by local-level resource users. These programs provide locally available information and knowledge on best practices aimed at sustainability with means within communities. This encourages community members in other localities to come together to seek the way forward on the basis of lessons from successful communities aired on local radio stations (both community or national radio stations). It is easier to adopt practices that have worked in near vicinities. After all,what is currently called co-management is seemingly based on indigenous knowledge of fishers and other resource users. Mbenji Island is one of the custodians of ICT option in small-scale fisheries management of Lake Malawi. Information Communication Technology provides opportunity for both the Malawi Department of Fisheries (DoF) and fishers with information about fisher community activities including catch and market regardless of distance.
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Strieder Philippsen, Juliana, Carolina Viviana Minte-Vera, Edson Kiyoshi Okada, Adriana Rosa Carvalho, and Ronaldo Angelini. "Fishers' and scientific histories: an example of consensus from an inland fishery." Marine and Freshwater Research 68, no. 5 (2017): 980. http://dx.doi.org/10.1071/mf16053.
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In this study we tested the basic premise that fishers’ knowledge provides similar perceptions about exploited stocks to data gathered by standardised monitoring in a small-scale commercial fishery. To that end, we compared temporal trends in catch and individual size for fish species between data obtained from interviews with fishers and a 25-year dataset from a landing monitoring program in the Itaipu Reservoir (Brazil). Fishers described with accuracy changes in species composition of the catches, from large migratory species of high commercial value (common before impoundment) to migratory species of low commercial value and sedentary species following damming. Temporal trends in catches reported by fishers and documented in the landing data matched for most species. Histories diverge when absolute values are involved, such as when fishers were asked to recall their largest catch. Fishers were homogeneous in their reports, indicating that instead of individual opinions, they revealed knowledge resulting from their observation and fishery experience. Fishers can be a reliable source of information for detecting changes in catches over time, especially when large-scale habitat changes have occurred within the time scale of a fisher career. Fishers may be key partners to be considered by managers in information gathering for effective management.
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Copes, Parzival, and Anthony Charles. "Socioeconomics of Individual Transferable Quotas and Community-Based Fishery Management." Agricultural and Resource Economics Review 33, no. 2 (October 2004): 171–81. http://dx.doi.org/10.1017/s106828050000575x.
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In many fisheries around the world, the failures of centralized, top-down management have produced a shift toward co-management—collaboration and sharing of decision making between government and stakeholders. This trend has led to a major debate between two very different co-management approaches—community-based fishery management and market-based individual transferable quota management. This paper examines the debate over the relative merits of these models and undertakes a socioeconomic analysis of the two approaches. The paper includes (1) an analysis of differences in the structure, philosophical nature, and underlying value systems of each, including a discussion of their treatment of property rights; (2) a socioeconomic evaluation of the impacts of each system on boat owners, fishers, crew members, other fishery participants, and coastal communities, as well as the distribution of benefits and costs among fishery participants; and (3) examination of indirect economic effects that can occur through impacts on conservation and fishery sustainability. The latter relate to (a) the conservation ethic, (b) the flexibility of management, (c) the avoidance of waste, and (d) the efficiency of enforcement. The paper emphasizes the need for a broader approach to analyzing fishery management options, one that recognizes and properly assesses the diversity of choices, and that takes into account the interaction of the fishery with broader community and regional realities.
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Zambrano, Alan, María F. Laguna, Marcelo N. Kuperman, Pedro Laterra, Jorge A. Monjeau, and Laura Nahuelhual. "A tragedy of the commons case study: modeling the fishers king crab system in Southern Chile." PeerJ 11 (March 14, 2023): e14906. http://dx.doi.org/10.7717/peerj.14906.
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Illegal fishing in small-scale fisheries is a contentious issue and resists a straightforward interpretation. Particularly, there is little knowledge regarding cooperative interactions between legal and illegal fishers and the potential effects on fisheries arising from these interactions. Taking the Chilean king crab (Lithodes santolla; common name centolla) fishery as a case study, our goal is twofold: (i) to model the effect of illegal-legal fishers’ interactions on the fishery and (ii) analyze how management and social behavior affect fishery’s outcomes. We framed the analysis of this problem within game theory combined with network theory to represent the architecture of competitive interactions. The fishers’ system was set to include registered (legal) fishers and unregistered (illegal) fishers. In the presence of unregistered fishers, legal fishers may decide to cooperate (ignoring the presence of illegal fishers) or defect, which involves becoming a “super fisher” and whitewashing the captures of illegal fishers for a gain. The utility of both players, standard fisher and super fisher depend on the strategy chosen by each of them, as well as on the presence of illegal fishers. The nodes of the network represent the legal fishers (both standard and super fishers) and the links between nodes indicate that these fishers compete for the resource, assumed to be finite and evenly distributed across space. The decision to change (or not) the adopted strategy is modeled considering that fishers are subjected to variable levels of temptation to whitewash the illegal capture and to social pressure to stop doing so. To represent the vital dynamics of the king crab, we propose a model that includes the Allee effect and a term accounting for the crab extraction. We found that the super fisher strategy leads to the decrease of the king crab population under a critical threshold as postulated in the tragedy of the commons hypothesis when there are: (i) high net extraction rates of the network composed of non-competing standard fishers, (ii) high values of the extent of the fishing season, and (iii) high density of illegal fishers. The results suggest that even in the presence of super fishers and illegal fishers, the choice of properly distributed fishing/closure cycles or setting an extraction limit per vessel can prevent the king crab population from falling below a critical threshold. This finding, although controversial, reflects the reality of this fishery that, for decades, has operated under a dynamic in which whitewashing and super fishers have become well established within the system.
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Miller, Robert J. "Courage and the management of developing fisheries." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 5 (May 1, 1999): 897–905. http://dx.doi.org/10.1139/f99-011.
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Devising a fishery management plan can be intimidating because of the diversity of issues, incomplete information, and criticism from many quarters. Here, fishery managers and scientists are encouraged to anticipate problems and to set an agenda for solving them. A guide to problems presented by developing fisheries and the order to address them are organized into four phases. In Phase I, fishers are given the opportunity to demonstrate commercial viability with a minimum of interference. In Phase II, the extent of the resource is mapped, gear-related regulations are developed, and fishers begin assuming responsibility for management decisions. In Phase III, basic biological studies are carried out, long-term management targets are set, and monitoring and regulation to achieve the targets are put into place. The fishing-down period should be extended until the long-term management plan is in place. This avoids having to pay for overfishing by underfishing. The challenge of Phase IV is staying the course laid out.
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Patil, G. P. "Fishery and Forestry Management." American Statistician 39, no. 4 (November 1985): 361–62. http://dx.doi.org/10.1080/00031305.1985.10479468.
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Corkeron;, P. J. "Fishery Management and Culling." Science 306, no. 5703 (December 10, 2004): 1891d—1892d. http://dx.doi.org/10.1126/science.306.5703.1891d.
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Matsuda, Hiroyuki, Mitsutaku Makino, Minoru Tomiyama, Stefan Gelcich, and Juan Carlos Castilla. "Fishery management in Japan." Ecological Research 25, no. 5 (August 20, 2010): 899–907. http://dx.doi.org/10.1007/s11284-010-0748-5.
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Bellwood, D. R. "Fishery and Reef Management." Science 279, no. 5359 (March 27, 1998): 2019e—2025. http://dx.doi.org/10.1126/science.279.5359.2019e.
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Doulman, David J. "Community-based fishery management." Marine Policy 17, no. 2 (March 1993): 108–17. http://dx.doi.org/10.1016/0308-597x(93)90025-x.
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Hanna, Susan S. "User participation and fishery management performance within the pacific fishery management council." Ocean & Coastal Management 28, no. 1-3 (January 1995): 23–44. http://dx.doi.org/10.1016/0964-5691(95)00046-1.
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Thomas, Alyssa S., Taciano L. Milfont, and Michael C. Gavin. "Scenario-based analyses evaluate potential outcomes of proposed regulatory changes in recreational fishery." ICES Journal of Marine Science 77, no. 6 (July 19, 2019): 2333–43. http://dx.doi.org/10.1093/icesjms/fsz141.
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Abstract Understanding current and predicting future behaviour of fishers is fundamental to designing effective management strategies. The management of most recreational fisheries requires releasing fish not meeting size or daily limits, and assuming the majority survive. In the Marlborough Sounds, New Zealand, a maximum size limit imposed on the blue cod (Parapercis colias) fishery aimed to achieve a more balanced sex ratio for this hermaphroditic species. We tested three alternative size limit scenarios (current, increased, and no maximum size) in a study with recreational fishers (N = 420) to investigate whether regulation change would influence their intentions to discard fish and fishing satisfaction. Increasing or eliminating the maximum size led to lower discard intentions and greater fishing satisfaction, suggesting strategies to achieve both management goals (e.g. more large fish) and increased fisher satisfaction (potentially increasing compliance). More broadly, the results demonstrate the benefits of using scenarios to evaluate potential regulatory changes prior to implementation.
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Tweedley, James R., Clara Obregón, Sarah J. Beukes, Neil R. Loneragan, and Michael Hughes. "Differences in Recreational Fishers’ Motivations for Utilising Two Estuarine Fisheries." Fishes 8, no. 6 (May 29, 2023): 292. http://dx.doi.org/10.3390/fishes8060292.
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Effective fisheries management requires an understanding of human dimensions. This study elicited the salient motivations for recreational blue swimmer crab and black bream fishing in Western Australia and whether these views differed depending on the fishing location and/or the characteristics of the fisher. Crab fishers were strongly consumption-orientated and aimed to “catch big crabs” and “catch enough crabs to eat”. Furthermore, 91% consumed their catch, with only 2% practicing catch-and-release fishing. In contrast, 81% of black bream fishers did so for the sport/challenge, with the strongest motivation being to catch a bream considerably above legal size and with food only selected by 15% of respondents; most fishers released caught fish. The marked differences between the fisheries for the two species, which co-occur in the same estuaries, are likely driven by the accessible nature of the crab fishery, ease of catching crabs, the low cost of fishing equipment, and their taste. Fishing for black bream, however, requires more expensive equipment, patience, and a greater skill level. Fishers considered crabbing to be as important as other fishing and outdoor activities, whereas bream fishers considered bream fishing considerably more important, reflecting the trophy nature of this fishery.
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Mozumder, Mohammad Mojibul Hoque, Aili Pyhälä, Md Abdul Wahab, Simo Sarkki, Petra Schneider, and Mohammad Mahmudul Islam. "Governance and Power Dynamics in a Small-Scale Hilsa Shad (Tenualosa ilisha) Fishery: A Case Study from Bangladesh." Sustainability 12, no. 14 (July 16, 2020): 5738. http://dx.doi.org/10.3390/su12145738.
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This paper considers the hilsa shad (Tenualosa ilisha) fishery of southern Bangladesh as a case study regarding governance and power dynamics at play in a small-scale fishery, and the relevance of these for the sustainable management of coastal fisheries. Qualitative methods, involving in-depth individual interviews (n = 128) and focus group discussions (n = 8) with key stakeholders in the hilsa fishery, were used to capture multiple perspectives on governance from those in different positions in the relative power structures studied, while facilitating insightful discussions and reflections. The analysis here is based on a power cube framework along three power dimensions (levels, spaces, and forms) in Bangladesh’s hilsa fishery. The study displays an imbalance in the present hilsa governance structure, with some stakeholders exercising more power than others, sidelining small-scale fishers, and encouraging increasing illegal fishing levels that ultimately harm both the fisheries and those dependent on them. To overcome this, we propose a co-management system that can play a vital role in equalizing power asymmetry among hilsa fishery stakeholders and ensure effective hilsa fishery governance. Our results suggest that recognizing analyzed power dynamics has substantial implications for the planning and implementation of such co-management and the long-term sustainability of the hilsa fishery.
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Simfukwe, Kingdom, Moses Majid Limuwa, and Friday Njaya. "Are Chilimira Fishers of Engraulicypris sardella (Günther, 1868) in Lake Malawi Productive? The Case of Nkhotakota District." Sustainability 14, no. 23 (November 30, 2022): 16018. http://dx.doi.org/10.3390/su142316018.
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An ecological shift has populated Engraulicypris sardella as a livelihood and economic drive among fishers in Malawi. However, the paucity of biological information regarding E. sardella limits the effective monitoring and sustainable management of the fishery. This has created a heavily invested fishery in terms of the effort put into fishing, but it is poorly managed. Moreover, the current production capacity from the fishery has a negligible impact on lessening the shortfall of the national fish demand, indicating its underperformance. Therefore, the productive efficiency of Lake Malawi Chilimira fishers in exploiting E. sardella was analysed. A multi-stage sampling technique was used to sample 355 Chilimira fishers between July and October 2021. Results from the translog stochastic frontier model revealed that Chilimira fishers had an overall mean technical efficiency of 60% that ranged between 21% and 92%. This indicates that Chilimira fishers are 40% technically inefficient in exploiting E. sardella. The fishing inputs of bunt area, light emitting diode (LED) bulbs, and mesh size significantly contributed to technical efficiency, whereas boat size, fishing depth, number of hauls, and mosquito net lining significantly reduced the technical inefficiency. On average, the Chilimira fishery is operating with increasing returns to scale with bunt area, the quantity of fuel (litres), and the number of LED bulbs having positive input–output elasticity. This means that new developments in the fishery, including LED bulbs, increased bunt area, and boat size, are key factors that will improve fishing efficiency for sustainable fishery exploitation. In contrast, illegal fishing units of small bunt mesh size and mosquito net lining at the bunt threaten the sustainability of the fishery. It is, therefore, important that relevant stakeholders put policy measures in place that promote sustainable fishing effort approaches in exploiting the virgin offshore fishery to maximise catch.
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Kroetz, Kailin, Matthew N. Reimer, James N. Sanchirico, Daniel K. Lew, and Justine Huetteman. "Defining the economic scope for ecosystem-based fishery management." Proceedings of the National Academy of Sciences 116, no. 10 (February 13, 2019): 4188–93. http://dx.doi.org/10.1073/pnas.1816545116.
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The emergence of ecosystem-based fisheries management (EBFM) has broadened the policy scope of fisheries management by accounting for the biological and ecological connectivity of fisheries. Less attention, however, has been given to the economic connectivity of fisheries. If fishers consider multiple fisheries when deciding where, when, and how much to fish, then management changes in one fishery can generate spillover impacts in other fisheries. Catch-share programs are a popular fisheries management framework that may be particularly prone to generating spillovers given that they typically change fishers’ incentives and their subsequent actions. We use data from Alaska fisheries to examine spillovers from each of the main catch-share programs in Alaska. We evaluate changes in participation—a traditional indicator in fisheries economics—in both the catch-share and non–catch-share fisheries. Using network analysis, we also investigate whether catch-share programs change the economic connectivity of fisheries, which can have implications for the socioeconomic resilience and robustness of the ecosystem, and empirically identify the set of fisheries impacted by each Alaska catch-share program. We find that cross-fishery participation spillovers and changes in economic connectivity coincide with some, but not all, catch-share programs. Our findings suggest that economic connectivity and the potential for cross-fishery spillovers deserve serious consideration, especially when designing and evaluating EBFM policies.
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Jauharee, Ahmed Riyaz, Manuela Capello, Monique Simier, Fabien Forget, Mohamed Shiham Adam, and Laurent Dagorn. "Tuna behaviour at anchored FADs inferred from Local Ecological Knowledge (LEK) of pole-and-line tuna fishers in the Maldives." PLOS ONE 16, no. 7 (July 29, 2021): e0254617. http://dx.doi.org/10.1371/journal.pone.0254617.
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The Maldives tuna fishery landings in 2018 were 148, 000 t and accounted for nearly a quarter of the global pole-and-line tuna catch. This fishery partially relies on a network of 55 anchored fish aggregating devices (AFADs) deployed around the archipelago. About one-third of the total pole-and-line tuna catch is harvested at AFADs. Although the AFAD fishery has existed for 35 years, knowledge on the behaviour of tuna in the AFAD array is still limited, precluding the development of science-based fishery management. In this study, local ecological knowledge (LEK) of fishers was used to improve our understanding of tuna behaviour, through personal interviews of 54 pole-and-line fishers from different parts of the archipelago. Interview results suggest that during the northeast monsoon tuna are more abundant on the eastern side of the Maldives, while during the southwest monsoon they are more abundant on the western side of the Maldives. Most fishers believed that tuna tend to stay at the AFADs for 3 to 6 days and remain within 2 miles from the AFADs when they are associated. Fishers believe that strong currents is the main factor for tuna departure from AFADs, though high sea surface temperatures and stormy conditions were also thought to contribute to departures. Moderate currents are believed to be a favourable condition to form aggregations at the AFADs while other factors such as suitable temperature, prey and attractants enhance this aggregation. Fishers also believe that there are multiple schools segregated according to size and species at AFADs and that catchability is higher at dawn and in the late afternoon when the tuna occur shallower in the water column. This study is an important step towards engaging the Maldivian tuna fishers into a science-based fishery management.
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Siregar, Nur Mar Atushsholihah, Yoedhi Swastanto, and Budiman Djoko Said. "FISHERY RESOURCES MANAGEMENT IN THE REPUBLIC OF INDONESIA’S FISHERY MANAGEMENT REGION 711 FOR THE SUSTAINABLE FISHERY RESOURCES CONTROL." Jurnal Pertahanan 5, no. 1 (April 17, 2019): 19. http://dx.doi.org/10.33172/jp.v5i1.468.
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<p>The Republic of Indonesia Fisheries Management Region is an area that intended for controlling the fisheries management activities. However, the potential value of fisheries in WPP-RI 711 has been decreasing starting from 2016 to 2017. The problems are about fisheries resource management activities in the region which are then linked to government policy control. This study seeks to determine the development of fisheries resource production in FMR-RI 711, the level of utilization based on management with the MSY and MEY models, and also control of sustainable fisheries policies. This study uses experimental quantitative methods with the Schaefer, Fox and Gordon models. Data obtained came from fisheries resource groups and data samples were taken from shrimp groups. The results of the analysis show that the average development of fisheries resource production in FMR-RI 711 has decreased even experienced overfishing in the commodity of Small Pelagic Fish and Crustaceans. The Schaefer model is considered the most appropriate because it has a determination coefficient value of 42.9% and has an optimum effort value of 179 trips/year, with the MSY value obtained at 3.8520 tons/year. The policy controls carried out so far are still very lacking and need to take firm action from the government in overcoming fisheries problems that are overfishing. Therefore, it can be concluded that fisheries management in FMR-RI 711 has not run optimally, then fisheries management should also be carried out by considering the economic aspects of fisheries, besides it also needs serious efforts on fisheries supervision and the development of a cost model to maintain resources from overfishing.</p><div><p class="Els-keywords">Keywords: Fisheries management, Fisheries policy, FMR-RI 711</p></div>
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Aylesworth, Lindsay, and Ting-Chun Kuo. "Reporting time period matters: quantifying catch rates and exploring recall bias from fisher interviews in Thailand." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 12 (December 2018): 2114–22. http://dx.doi.org/10.1139/cjfas-2017-0169.
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Catch rates reported by fishers are commonly used to understand the status of a fishery, but the reliability of fisher-reported data is affected by how they recall such information. Recalling catch may be influenced by the choice of reporting time period. Using interview data from fishers in Thailand, we investigated (1) how the time period for which fishers report their catch rates (e.g., per day or month) correlates with annual catch estimates and (2) the potential of recall bias when fishers reported multiple catch rates. We found that the annual catch estimates of fishers who reported on a shorter time period (haul, day) were significantly higher than those reported on a longer time period (month, year). This trend held true when individual fishers reported over multiple time periods, suggesting recall bias. By comparing fisher reports with external data sets, we identified that the mean across all reports was most similar to other data sources, rather than any time period. Our research has strong implications in using fishers’ knowledge for fisheries management.
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Jalbert, Kirk, Matthew Cutler, Teal Guetschow, and Noa Bruhis. "Surveillance Systems for Sustainable Fisheries: Perceptions on the Adoption of Electronic Monitoring in the Northeast US Multispecies Fishery." Surveillance & Society 21, no. 3 (September 24, 2023): 288–303. http://dx.doi.org/10.24908/ss.v21i3.15790.
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Amendment 23 (A23) to the Northeast Multispecies Fisheries Management Plan will remake monitoring systems for the Northeast US commercial groundfish fishery. In addition to substantially increasing monitoring coverage, A23 will provide fishers with the option to utilize electronic monitoring (EM) technologies in place of human at-sea observers. Based on twenty-six interviews with representatives of the fishing industry, nongovernmental organizations, regulatory agencies, EM service providers, and other stakeholder groups, this paper examines how the fishery is planning for the adoption of EM. We focus on the differing perspectives on the value of EM as an appropriate tool for protecting the fishery, and as a tool of surveillance that may transform the lives of fishers. We find that while most stakeholders support the use of EM in the future, mistrust within the industry—based on historical regulatory failures, perceived lack of information on technical feasibility, privacy and data ownership issues, and the unknown long-term costs to vessel owners—poses significant barriers to successful adoption of these technologies. We conclude that these barriers can be overcome by investing in co-management driven EM implementations that draw on the expertise of fishers and increase their autonomy over their vessels and their use of data. This study offers critical insights into the conflicting sociotechnical imaginaries that co-produce spaces of surveillance for natural resource management, as well as provides important findings for the fishery as A23 moves into implementation phases.
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RICHARDSON, ELIZABETH A., MICHEL J. KAISER, and GARETH EDWARDS-JONES. "Variation in fishers' attitudes within an inshore fishery: implications for management." Environmental Conservation 32, no. 3 (September 2005): 213–25. http://dx.doi.org/10.1017/s0376892905002456.
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Understanding the incentives influencing the attitudes and behaviour of resource users is a crucial input to the design of institutions for resource management. Typically fishers have been expected to exploit resources in an independent profit-maximizing manner, which is in line with common property theory, although these expectations are not always met because fishers' behaviours and attitudes are generally more heterogeneous than previously considered. Attitudinal differences between participants in the inshore commercial fishery of Wales, UK, were investigated. Semi-structured face-to-face interviews were conducted with 161 fishers from the five main sectors, namely mobile gear fishers, crustacean potters, whelk potters, line/net fishers and transient fishers. Unprompted expressions of attitudes and responses to open-ended questions underwent thematic-coding and were analysed with fishers' responses to structured questions. Investigation into whether the incentive to participate in resource stewardship varied between sectors as predicted by common property theory found attitudinal similarities across the sectors, but also certain important differences. Results suggested an attitudinal continuum, with mobile gear fishers and crustacean potters at the two extremes, and intermediate positions occupied by transient fishers, whelk potters and line/net fishers. Mobile gear fishers believed most strongly that their fishery was controlled too tightly and was impacted by other fishers and other anthropogenic influences. Crustacean potters believed most strongly that conservation of stocks was necessary and that minimum landing sizes were not overcautious. The attitudes that characterized each sector were related to the characteristics of the sector and its resource base, and generally concurred with theoretical predictions. In particular, target species' mobility and past sector experiences predicted the inclination of fishers in each sector towards resource stewardship. The observed attitudinal differences implied varying personal discount rates that may affect how respondents respond to and comply with management tools. Furthermore, attitudinal differences among sectors mean that an effective management tool in one sector may be inappropriate or counterproductive in another.
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Purcell, Steven W., Watisoni Lalavanua, Brian R. Cullis, and Nicole Cocks. "Small-scale fishing income and fuel consumption: Fiji’s artisanal sea cucumber fishery." ICES Journal of Marine Science 75, no. 5 (March 27, 2018): 1758–67. http://dx.doi.org/10.1093/icesjms/fsy036.
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Abstract Understanding the income and costs of fishing is fundamental to managing fisheries and planning interventions to improve efficiency and gender equity. Few studies offer data on fisher incomes and fuel use in small-scale fisheries (SSFs), and fewer have assessed factors influencing variation among fishers and between genders. We interviewed 235 artisanal fishers among 34 island villages in an artisanal sea cucumber fishery in Fiji. Linear mixed models were used to determine the effect of geographic and socioeconomic variables on incomes and fuel use from fishing sea cucumbers. Net income of sea cucumbers to fishers, averaging FJ$8, 171 year−1 (US$4, 494 year−1) (range: FJ$0–52,008 year−1), varied among villages and was 47% lower for women than men. On an average, 60% of fishers’ gross annual income came from fishing and selling sea cucumbers, although this proportion varied greatly even within villages. Fishers who practised gleaning, fished less often, or possessing numerous livelihood income streams, were less economically dependent on sea cucumbers. Men tended to estimate higher incomes for an average day of fishing than women when compared with their recall of last sale. Fuel use varied greatly among regions in Fiji but, overall, averaged 428 L fisher−1 year−1, and represented 28% of gross income. More economical fishing strategies by women resulted in lower fuel use than men per fishing day. Breath-hold divers used less fuel (compared to fishers using scuba) and fishers targeting deep-water species used more fuel than other fishers. A best approximation of 8000 t CO2 year−1 for the carbon footprint of the whole fishery suggests that some SSFs, such as the one studied here, can be significant contributors to greenhouse gas emissions, even compared to many large-scale fisheries globally. Reforms to the management of SSFs should consider regulations that minimize carbon emissions and reduce economic dependency on vulnerable marine resources.
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Briton, Florence, Olivier Thébaud, Claire Macher, Caleb Gardner, and Lorne Richard Little. "Flexibility of joint production in mixed fisheries and implications for management." ICES Journal of Marine Science 78, no. 5 (April 14, 2021): 1599–613. http://dx.doi.org/10.1093/icesjms/fsab057.
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Abstract Over the past decade, efforts have been made to factor technical interactions into management recommendations for mixed fisheries. Yet, the dynamics underlying joint production in mixed fisheries are generally poorly captured in operational mixed fisheries models supporting total allowable catch advice. Using an integrated ecological–economic simulation model, we explore the extent to which fishers are likely to alter the species composition of their landings in a mixed fishery managed with individual transferable quotas, the Australian Southern and Eastern Scalefish and Shark Fishery. Our simulations capture three different types of joint production problems, highlighting the flexibility that exists in terms of achievable catch compositions when quota markets provide the economic incentives to adapt fishing practices to quota availability. These results highlight the importance of capturing the drivers of fishing choices when advising TAC decisions in mixed fisheries. We also identify a hierarchy of species in this fishery, with harvest targets set for primary commercial species determining most of its socio-economic performance.
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Novaes, José Luís Costa, and Edmir Daniel Carvalho. "Analysis of artisanal fisheries in two reservoirs of the upper Paraná River basin (Southeastern Brazil)." Neotropical Ichthyology 11, no. 2 (June 2013): 403–12. http://dx.doi.org/10.1590/s1679-62252013005000002.
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We compared the artisanal fisheries, in terms of catch strategies, productivity, and gross per capita income, at two reservoirs: the Barra Bonita (an eutrophic reservoir with some introduced species), and the Jurumirim (an oligotrophic reservoir, with no introduced species). Published data and structured interviews with fishers were used to evaluate fishing activity, fish biomass, and the financial performance of the fisheries. In the Barra Bonita Reservoir we analysed data from 745 fishing trips, from which 86,691.9 kg of fish were landed, with a mean CPUE of 62.4 kg/fisher-1 day-1. The main type of fish caught was tilapia (71,513.5 kg; CPUE of 51.5 kg/fisher-1 day-1), which constituted 82.5% of the biomass caught. In the Jurumirim Reservoir, we analysed data from 2,401 fishing trips, from which 25,093.6 kg of fish were landed, with a mean CPUE of 10.4 kg/fisher-1 day-1. The main type of fish caught was "traíra" (6,158.6 kg; CPUE of 2.6 kg/fisher-1 day-1), which constituted 24.5% of the biomass caught. Ordination analysis (PCA) indicated that there was a difference in composition between the fishing reservoirs and ANCOVA showed that there was a significant difference in fish production between the reservoirs. A Student's t-test showed that fishers in the Barra Bonita Reservoir had a significantly higher gross per capita income than those from the Jurumirim Reservoir. Although the Barra Bonita Reservoir has a higher fish production and the fishers earn a higher gross per capita income, we recommend the Jurumirim Reservoir as a model for artisanal fishery management because fishing activity in this reservoir is viable in the long term and such a model would promote conservation and sustainability. This contrasts with the Barra Bonita Reservoir, in which the fishery is not viable in the long term, due to environmental problems caused by artificial eutrophication and the introduction of alien species. It is also noted that in many countries, management of fisheries based on exotic species has not been viable in the long term.
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Kennedy, James, Caroline M. F. Durif, Ann-Britt Florin, Alain Fréchet, Johanne Gauthier, Karin Hüssy, Sigurður Þór Jónsson, Halldór Gunnar Ólafsson, Søren Post, and Rasmus B. Hedeholm. "A brief history of lumpfishing, assessment, and management across the North Atlantic." ICES Journal of Marine Science 76, no. 1 (October 16, 2018): 181–91. http://dx.doi.org/10.1093/icesjms/fsy146.
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Abstract This report documents the fishery, assessment, and management of lumpfish (Cyclopterus lumpus) across its distribution range. Targeting lumpfish for their roe on a large scale began in the 1950s in Iceland and Norway and then in Canada in the 1970s and Greenland in the 1990s. When the fishery began, there were few regulations, but limits on vessel size, mesh size, number of nets, and length of the fishing season were gradually implemented over time. Worldwide landings have varied from ca. 2000 to 8000 tonnes of roe between 1977 and 2016. Iceland and Canada accounted for >80% of the landings until 2000. After 2013, Greenland and Iceland accounted for >94%. All countries except Iceland show a decreasing trend in the number of boats participating in the fishery, which is related to several factors: the monetary value of the roe, changes in the abundance of lumpfish, and increasing age of artisanal fishers. Each country has a different combination of data available for assessment from basic landings and fishing effort data to more detailed fishery independent survey indices of abundance. The management of total catch also differs, with an effort-controlled fishery in Iceland and Canada, a total allowable catch (TAC) per boat in Norway, and TAC per area in Greenland. Population abundance is above management targets in Iceland and Norway, but the status is less clear in Greenland and around Denmark/Sweden and appears to be depleted around Canada. Certification by the Marine Stewardship Council was instrumental in the adoption of a management plan in Greenland; however, benefits to the fishers remain unclear. Aspects surrounding the biology of lumpfish, which is poorly understood and requires investigation, include growth rate, natural mortality, and population differentiation. In addition, there is concern about the potential impacts that the recent escalation in production of lumpfish for use as cleaner fish in the aquaculture industry could have on the wild population.
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Hossain, Mohammed Anwar, and Al Amin Rabby. "Institutional constraints to fishers' resilience: Community based fishery management in Bangladesh." International Journal of the Commons 13, no. 1 (April 17, 2019): 507. http://dx.doi.org/10.18352/ijc.902.
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Honarmand Ebrahimi, Sanaz, Marinus Ossewaarde, and Ariana Need. "Smart Fishery: A Systematic Review and Research Agenda for Sustainable Fisheries in the Age of AI." Sustainability 13, no. 11 (May 27, 2021): 6037. http://dx.doi.org/10.3390/su13116037.
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Applications of artificial intelligence (AI) technologies for improving the sustainability of the smart fishery have become widespread. While sustainability is often claimed to be the desired outcome of AI applications, there is as yet little evidence on how AI contributes to the sustainable fishery. The purpose of this paper is to perform a systematic review of the literature on the smart fishery and to identify upcoming themes for future research on the sustainable fishery in the Age of AI. The findings of the review reveal that scholarly attention in AI-inspired fishery literature focuses mostly on automation of fishery resources monitoring, mainly detection, identification, and classification. Some papers list marine health and primary production which are vital dimensions for Large Marine Ecosystems to recycle nutrients to sustain anticipated production levels. Very few reviewed articles refer to assessing individual needs, particularly fishers, from AI deployment in fisheries and policy response from governments. We call for future AI for sustainable fishery studies on how fishers perceive AI needs, and how governments possess a tangible strategy or depth of understanding on the regulation of AI concerning smart fishery systems and research on resilience-enhancing policies to promote the value and potentials of the AI-inspired smart fishery in different locations.
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Mathew, Sebastian. "Fishery-dependent information and the ecosystem approach: what role can fishers and their knowledge play in developing countries?" ICES Journal of Marine Science 68, no. 8 (July 21, 2011): 1805–8. http://dx.doi.org/10.1093/icesjms/fsr113.
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Abstract Mathew, S. 2011. Fishery-dependent information and the ecosystem approach: what role can fishers and their knowledge play in developing countries? – ICES Journal of Marine Science, 68: 1805–1808. An ecosystem approach to fishery management is as much a mechanism to deal with the impact of fishing on targeted, associated, and dependent fish stocks, and on the habitat, as it is to deal with the impact of habitat degradation from natural and anthropogenic factors on fishing. In developing countries, often with little institutional capacity for generating timely and reliable information for managing fisheries, effective integration of the knowledge possessed by fishers and their communities regarding, for example, oceanographic, biological, economic, social, and cultural aspects can contribute to an ecosystem approach to fisheries. The challenge is to identify and validate such knowledge and to create policy and legal space to integrate it into management, also drawing upon good practice in industrialized countries. An attempt is made to identify such knowledge, to discuss its salient aspects, and to look at the conditions under which its practical value can be enhanced and integrated into formal fishery-management systems in developing countries.
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Jamieson, A., N. Ryman, and F. Utter. "Population Genetics and Fishery Management." Biometrics 45, no. 4 (December 1989): 1343. http://dx.doi.org/10.2307/2531800.
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Buth, Donald G., Nils Ryman, and Fred Utter. "Population Genetics and Fishery Management." Copeia 1990, no. 1 (March 6, 1990): 268. http://dx.doi.org/10.2307/1445857.
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Wang, Yan Ling. "Fishery Logistics Insurance Management Schemes." Advanced Engineering Forum 6-7 (September 2012): 773–77. http://dx.doi.org/10.4028/www.scientific.net/aef.6-7.773.
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The intense competition of global markets and consumers' high expectations forced enterprises to invest and concentrate on the relationship with their customers and suppliers. The growing interest in supply chain management, both in developed and developing countries in the fisheries. With the catastrophic events in the fisheries supply chain, the diversity of the fisheries risk and insurance issues become increasingly important. However, participants in the supply chain is a separate and independent economic entities, and only consider their own interests. In this article, the fisheries supply chain insurance contract on the basis of the model and the diversity of the fisheries risk and insurance policy issues, the behavior of each participant. In this article, the diversity of the fisheries supply chain risk and insurance process, the lack of sufficient knowledge of the fisheries supply chain contract signing or the exact probability of the insured event, the fisheries supply chain risk insurance companies use the information provided by the fisheries supply chain contract signature the signing of the contract or the behavior of the fisheries supply chain insurers of people insured or fisheries supply chain and fisheries supply chain in order to establish the parameters of the insurance contract of the fisheries supply chain.
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Bulgakova, T. I. "MODELS FOR MIXED FISHERY MANAGEMENT." Problems of fisheries 16, no. 4 (2015): 440–49. http://dx.doi.org/10.36038/0234-2774-2015-16-4-440-449.
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Pikitch, E. K. "ECOLOGY: Ecosystem-Based Fishery Management." Science 305, no. 5682 (July 16, 2004): 346–47. http://dx.doi.org/10.1126/science.1098222.
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