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Article: The people’s fishery in perspective: Current analysis of the small pelagic fishery value chain of Ghana

Asiedu, Berchie / Okpei, Paulina / Amponsh, Samuel K.K. / Failler, Pierre / Deme, Bara / Sumaila, Rashid Ussif

Fisheries research. 2022 Oct., v. 254

2022

Abstract: Small pelagic fish (SPF) are among the most traded fishery products in small-scale fishing in coastal areas in low-income countries. Small-scale fisheries play a key role in the supply of fish products and form an integral component of the world’s fish ... ...

Abstract	Small pelagic fish (SPF) are among the most traded fishery products in small-scale fishing in coastal areas in low-income countries. Small-scale fisheries play a key role in the supply of fish products and form an integral component of the world’s fish production. However, due to post-harvest losses, distribution, and marketing issues, most SPFs struggle to increase the market value of their fishery products. We examined the current flow of small pelagic fish products, benefit distribution, trade relationships and quality issues in the small-scale fisheries in Ghana. The purpose of the assessment was to provide relevant information for future management strategies aimed at promoting sustainable fisheries while also ensuring fisherfolk received a higher proportion of the market value of their harvest. A mixed-method approach, involving questionnaire administration, direct observation and secondary data from the Fisheries Scientific Survey Division of the Fisheries Commission of Ghana was used to elicit information and data from actors along the SPF value chain. The pattern of the value chain was mapped and differences in profit analysed. From this analysis, fisherfolk made lower profit than fish processors and traders. We found that all actors received lower profit during the peak season relative to the lean season. Provision of post-harvest facilities, credit facilities and improved value-chain governance could increase efficiency and increase the income of fisherfolk.
Keywords	credit ; fish production ; fisheries ; governance ; income ; market value ; pelagic fish ; people ; questionnaires ; research ; supply chain ; surveys ; trade ; Ghana
Language	English
Dates of publication	2022-10
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	406532-3
ISSN	0165-7836
ISSN	0165-7836
DOI	10.1016/j.fishres.2022.106426
Database	NAL-Catalogue (AGRICOLA)

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Article: Global Ex-vessel Fish Price Database Revisited: A New Approach for Estimating ‘Missing’ Prices

Swartz, Wilf / Sumaila, Rashid / Watson, Reg

Environmental and resource economics. 2013 Dec., v. 56, no. 4

2013

Abstract: The Global Ex-vessel Fish Price Database (Ex-vessel DB) reported in Sumaila et al. (J Bioecon 9(1):39–51, 2007) was the first comprehensive database that presents average annual ex-vessel prices for all commercially exploited marine fish stocks by ... ...

Abstract	The Global Ex-vessel Fish Price Database (Ex-vessel DB) reported in Sumaila et al. (J Bioecon 9(1):39–51, 2007) was the first comprehensive database that presents average annual ex-vessel prices for all commercially exploited marine fish stocks by nationality of the fishing fleet. It contained over 30,000 reported price items, covering the period from 1950 to the present, and supplemented missing prices with estimates based on prices from a different year, species group or fleet nationality. This paper describes a revised missing price estimation approach, focused on the computation of annual average international prices for each species group, adjusted to domestic prices using the real exchange rate based on national purchasing power parity. Key advantages of the new approach are that it allows a larger number of reported prices to be used in the price estimation, and accounts for relative price level differences that exist between countries. Our new approach should improve the estimates in regions where reported prices are scarce or non-existent by linking domestic prices to the trends in international prices. Our analysis, based on the revised ex-vessel price estimates (in real 2005 USD), shows that the global marine fisheries landings have generated total value of USD 4.2 trillion since 1950, including USD 100 billion in 2005.
Keywords	databases ; fishing boats ; marine fish ; marine fisheries ; nationalities and ethnic groups ; prices ; purchasing
Language	English
Dates of publication	2013-12
Size	p. 467-480.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	1479788-4
ISSN	1573-1502 ; 0924-6460
ISSN (online)	1573-1502
ISSN	0924-6460
DOI	10.1007/s10640-012-9611-1
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Climate change impact on Canada's Pacific marine ecosystem

Talloni-Álvarez, Nicolás E. / Sumaila, Rashid U. / Le Billon, Philippe / Cheung, William W.L.

The current state of knowledge

2019

Abstract: Global warming is already affecting the oceans through changes in water temperature, acidification, oxygen content and sea level rise, amongst many others. These changes are having multiple effects on marine species worldwide, with subsequent impacts on ... ...

Abstract	Global warming is already affecting the oceans through changes in water temperature, acidification, oxygen content and sea level rise, amongst many others. These changes are having multiple effects on marine species worldwide, with subsequent impacts on marine fisheries, peoples' livelihoods and food security. This work presents a review of the recent literature on the current and projected impacts of climate change on Canada's Pacific marine ecosystem. We find that there is an increasing number of studies in British Columbia focusing on changes in ocean conditions and marine species responses under climate change, including an emerging literature on the socio-economic impacts of these changes considered to be a knowledge gap. According to the literature, it is well established that ocean temperatures are increasing over the long-term, especially, in southern areas of British Columbia. Warming trends are increasing in the spring and are strongest in summer. However, there are important uncertainties regarding other climate drivers, such as oxygen concentration and acidification, stemming mainly from the insufficiency of data. Pacific salmon, elasmobranchs, invertebrates and rockfishes are amongst the most vulnerable species groups to climate change in British Columbia. Also, shifts in stock distribution and fish abundance under climate change may have a significant impact on fish supply affecting the livelihoods and food security of some British Columbians. The magnitude of these impacts is likely to vary according to a latitudinal gradient, with southern coastal areas being more affected than northern and central areas; challenging multiple areas of governance, such as equity and fishing access amongst First Nations; and institutional arrangements for transboundary stocks between the U.S. and Canada.
Subject code	333
Language	English
Publisher	Elsevier
Publishing country	de
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: How can we minimize the impact of fishing?

Froese, Rainer / Winker, Henning / Gascuel, Didier / Sumaila, Rashid / Pauly, Daniel

2017

Abstract: How many times do you think you have eaten fish this year? Fish is delicious and it’s really good for you, but we need to make sure that we don’t over-fish our seas and oceans (Fig. 1). That way there are enough fish left to feed us for all the years to ... ...

Abstract	How many times do you think you have eaten fish this year? Fish is delicious and it’s really good for you, but we need to make sure that we don’t over-fish our seas and oceans (Fig. 1). That way there are enough fish left to feed us for all the years to come. We propose three simple rules for fisheries management, which would reduce the impact of fishing on the major fish species. The rules would also help to rebalance the ecosystems and reduce the damage that fishing causes when boats scrape their nets over the seabed to catch fish.
Language	German
Publishing country	de
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Are fishery management upgrades worth the cost?

Mangin, Tracey / Costello, Christopher / Anderson, James / Arnason, Ragnar / Elliott, Matthew / Gaines, Steve D / Hilborn, Ray / Peterson, Emily / Sumaila, Rashid

PloS one

2018 Volume 13, Issue 9, Page(s) e0204258

Abstract: Many analyses of fishery recovery have demonstrated the potential biological and economic benefits of management reform, but few have compared these to the associated costs of management upgrades, which can be substantial. This study aims to determine if ...

Abstract	Many analyses of fishery recovery have demonstrated the potential biological and economic benefits of management reform, but few have compared these to the associated costs of management upgrades, which can be substantial. This study aims to determine if the projected economic benefits of management reform outweigh the increases in management costs required to achieve those benefits. To answer this question, we developed a database of country-level fisheries management costs and use those to estimate the country-level costs of management changes. We use this framework to compare estimates of future costs of management upgrades against their economic benefits in terms of profit. Results indicate that for most nations, including the top 25 fishing nations, management upgrades outweigh their associated costs. This result is robust to a number of alternative assumptions about costs. Results also suggest that stronger reforms such as rights-based management, although sometimes more expensive to implement, can lead to greater net economic benefits compared to alternatives.
MeSH term(s)	Conservation of Natural Resources/economics ; Conservation of Natural Resources/legislation & jurisprudence ; Cost-Benefit Analysis ; Databases, Factual ; Fisheries/economics ; Fisheries/legislation & jurisprudence
Language	English
Publishing date	2018-09-20
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1932-6203
ISSN (online)	1932-6203
DOI	10.1371/journal.pone.0204258
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: The forgotten ocean: Why COP26 must call for vastly greater ambition and urgency to address ocean change

Laffoley, Dan / Baxter, John M. / Amon, Diva J. / Claudet, Joachim / Downs, Craig A. / Earle, Sylvia A. / Gjerde, Kristina M. / Hall‐Spencer, Jason M. / Koldewey, Heather J. / Levin, Lisa A. / Reid, Chris P. / Roberts, Callum M. / Sumaila, Rashid U. / Taylor, Michelle L. / Thiele, Torsten / Woodall, Lucy C.

Aquatic conservation. 2022 Jan., v. 32, no. 1

2022

Abstract: Of all the interconnected threats facing the planet, the top two are the climate and the biodiversity crises. Neither problem will be solved if we ignore the ocean. To turn the tide in favour of humanity and a habitable planet, we need to recognize and ... ...

Abstract	Of all the interconnected threats facing the planet, the top two are the climate and the biodiversity crises. Neither problem will be solved if we ignore the ocean. To turn the tide in favour of humanity and a habitable planet, we need to recognize and better value the fundamental role that the ocean plays in the earth system, and prioritize the urgent action needed to heal and protect the ocean at the ‘Earthscape’ level – the planetary scale at which processes to support life operate. The countries gathering at COP26 have unparalleled political capacity and leadership to make this happen. COP26 could be the turning point, but there must be commitment to united action for the ocean, as well as planning to meet those commitments, based on science‐led solutions that address the interconnectivity of the ocean, climate, and biodiversity. Key ways in which the ocean both contributes to and acts as the major buffer for climate change are summarized, focusing on temperature, but not forgetting the role of storing carbon. It is noted with ‘high confidence’ that the ocean has stored 91% of the excess heat from global warming, with land, melting ice, and the atmosphere only taking up approximately 5, 3, and 1%, respectively. We also highlight the impact of the recent large release of heat from the ocean to the atmosphere during the 2015–2016 El Niño. We then present six science‐based policy actions that form a recovery stimulus package for people, climate, nature, and the planet. Our proposals highlight what is needed to view, value, and treat the planet, including the ocean, for the benefit and future of all life.
Keywords	El Nino ; biodiversity ; carbon ; climate ; heat ; ice ; issues and policy ; leadership ; people ; politics ; temperature
Language	English
Dates of publication	2022-01
Size	p. 217-228.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	1146285-1
ISSN	1052-7613
ISSN	1052-7613
DOI	10.1002/aqc.3751
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online: Equilibrium management of fisheries with altruistic overlapping generations

Ekeland, Ivar / Karp, Larry / Sumaila, Rashid

(CUDARE working paper series ; 1124)

2011

Author's details	3000, Larry Karp and Rashid Sumaila
Series title	CUDARE working paper series ; 1124
Keywords	Fischereiressourcen ; Nachhaltigkeit ; Erneuerbare Ressourcen ; Zeitkonsistenz ; Markov-Kette ; Overlapping Generations ; Theorie ; Overlapping generations ; Time inconsistency ; Hyperbolic discounting ; Markov perfect ; Renewable resources
Language	English
Size	Online-Ressource (22 S.), graph. Darst.
Publisher	Univ. of California, Dept. of Agriculture and Resource Economics
Publishing place	Berkeley, Calif
Document type	Book ; Online
Database	ECONomics Information System

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Article: Bayesian Decision‐Network Modeling of Multiple Stakeholders for Reef Ecosystem Restoration in the Coral Triangle

VARKEY, DIVYA A. / PITCHER, TONY J. / McALLISTER, MURDOCH K. / SUMAILA, RASHID S.

Conservation biology. 2013 June, v. 27, no. 3

2013

Abstract: Proposals for marine conservation measures have proliferated in the last 2 decades due to increased reports of fishery declines and interest in conservation. Fishers and fisheries managers have often disagreed strongly when discussing controls on ... ...

Abstract	Proposals for marine conservation measures have proliferated in the last 2 decades due to increased reports of fishery declines and interest in conservation. Fishers and fisheries managers have often disagreed strongly when discussing controls on fisheries. In such situations, ecosystem‐based models and fisheries‐stock assessment models can help resolve disagreements by highlighting the trade‐offs that would be made under alternative management scenarios. We extended the analytical framework for modeling such trade‐offs by including additional stakeholders whose livelihoods and the value they place on conservation depend on the condition of the marine ecosystem. To do so, we used Bayesian decision‐network models (BDNs) in a case study of an Indonesian coral reef fishery. Our model included interests of the fishers and fishery managers; individuals in the tourism industry; conservation interests of the state, nongovernmental organizations, and the local public; and uncertainties in ecosystem status, projections of fisheries revenues, tourism growth, and levels of interest in conservation. We calculated the total utility (i.e., value) of a range of restoration scenarios. Restricting net fisheries and live‐fish fisheries appeared to be the best compromise solutions under several combinations of settings of modeled variables. Results of our case study highlight the implications of alternate formulations for coral reef stakeholder utility functions and discount rates for the calculation of the net benefits of alternative fisheries management options. This case study may also serve as a useful example for other decision analyses with multiple stakeholders. Modelo de Red de Decisión Bayesiana de Múltiples Actores Interesados en la Restauración de Ecosistemas de Arrecife en el Triángulo de Coral
Keywords	Bayesian theory ; case studies ; coral reefs ; ecological restoration ; fisheries ; marine ecosystems ; stakeholders ; tourism ; wildlife management
Language	English
Dates of publication	2013-06
Size	p. 459-469.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	58735-7
ISSN	1523-1739 ; 0888-8892
ISSN (online)	1523-1739
ISSN	0888-8892
DOI	10.1111/cobi.12036
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Bayesian decision-network modeling of multiple stakeholders for reef ecosystem restoration in the coral triangle.

Varkey, Divya A / Pitcher, Tony J / McAllister, Murdoch K / Sumaila, Rashid S

Conservation biology : the journal of the Society for Conservation Biology

2013 Volume 27, Issue 3, Page(s) 459–469

Abstract	Proposals for marine conservation measures have proliferated in the last 2 decades due to increased reports of fishery declines and interest in conservation. Fishers and fisheries managers have often disagreed strongly when discussing controls on fisheries. In such situations, ecosystem-based models and fisheries-stock assessment models can help resolve disagreements by highlighting the trade-offs that would be made under alternative management scenarios. We extended the analytical framework for modeling such trade-offs by including additional stakeholders whose livelihoods and the value they place on conservation depend on the condition of the marine ecosystem. To do so, we used Bayesian decision-network models (BDNs) in a case study of an Indonesian coral reef fishery. Our model included interests of the fishers and fishery managers; individuals in the tourism industry; conservation interests of the state, nongovernmental organizations, and the local public; and uncertainties in ecosystem status, projections of fisheries revenues, tourism growth, and levels of interest in conservation. We calculated the total utility (i.e., value) of a range of restoration scenarios. Restricting net fisheries and live-fish fisheries appeared to be the best compromise solutions under several combinations of settings of modeled variables. Results of our case study highlight the implications of alternate formulations for coral reef stakeholder utility functions and discount rates for the calculation of the net benefits of alternative fisheries management options. This case study may also serve as a useful example for other decision analyses with multiple stakeholders.
MeSH term(s)	Adaptation, Physiological ; Animals ; Bayes Theorem ; Biodiversity ; Caves ; Chiroptera/physiology ; Conservation of Natural Resources ; Coral Reefs ; Decision Support Techniques ; Microclimate ; Models, Theoretical ; Tropical Climate
Language	English
Publishing date	2013-06
Publishing country	United States
Document type	Journal Article
ZDB-ID	58735-7
ISSN	1523-1739 ; 0888-8892
ISSN (online)	1523-1739
ISSN	0888-8892
DOI	10.1111/cobi.12036
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Protect high seas biodiversity.

Science (New York, N.Y.)

2021 Volume 372, Issue 6546, Page(s) 1048–1049

MeSH term(s)	Animals ; Biodiversity ; Conservation of Natural Resources ; Environmental Monitoring ; International Cooperation ; Oceans and Seas ; United Nations
Language	English
Publishing date	2021-06-03
Publishing country	United States
Document type	Letter ; Research Support, Non-U.S. Gov't
ZDB-ID	128410-1
ISSN	1095-9203 ; 0036-8075
ISSN (online)	1095-9203
ISSN	0036-8075
DOI	10.1126/science.abj0581
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