Minimising unsustainable yield: Ten failing European fisheries

Steadman, Daniel; Appleby, Thomas; Hawkins, Julie P.

doi:10.1016/j.marpol.2014.03.030

Cited by 12 publications

(4 citation statements)

References 54 publications

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“…Historical data show that, once a fishery has collapsed, it is difficult for the ecosystem to reconstruct its productive potentials and diversity, and one typical example was the sudden fisheries collapse in the North Sea in 1970s (Fromentin, 2009;Dadswell et al, 2022). Since the early 21st century, various management intervention schemes were implemented to recover fisheries in the North Sea (Steadman et al, 2014;Hutchings and Kuparinen, 2020). Although the %PPR had sharply decreased and fishing mortality had decreased below the sustainable level, various studies suggested that the reduction in fishing mortality was too late to prevent irrevocable, long-term genetic, and population disturbance (Steadman et al, 2014).…”

Section: Lessons From the North Sea And Risks To Fisheries Around Chinamentioning

confidence: 99%

“…Since the early 21st century, various management intervention schemes were implemented to recover fisheries in the North Sea (Steadman et al, 2014;Hutchings and Kuparinen, 2020). Although the %PPR had sharply decreased and fishing mortality had decreased below the sustainable level, various studies suggested that the reduction in fishing mortality was too late to prevent irrevocable, long-term genetic, and population disturbance (Steadman et al, 2014). Olsen et al (2009) found that variability in body size for the Skagerrak juvenile population was reduced in the 21st century, compared with the data from the 20th century, which suggested that the North Sea sub-population had already suffered functional extinction.…”

Section: Lessons From the North Sea And Risks To Fisheries Around Chinamentioning

confidence: 99%

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Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

et al. 2022

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Fisheries catch is determined by a complex combination of biological and industrial factors. In this study, using data from the online database Sea Around Us from 1950 to 2018, the risk of fisheries collapse was assessed for the three large marine ecosystems (LMEs) around China by analyzing the carbon transfer efficiency, mean trophic level, and mean maximum length of fisheries catch and expansion factor. In addition, these were compared with the corresponding values for other LMEs, especially the Humboldt Current and the North Sea LMEs, which experienced fisheries collapse.Our results revealed high carbon transfer efficiencies in LMEs around China, suggesting large fishing efforts compared with LMEs with similar primary production. Although marine fish landings did not decline significantly, they were maintained by potential resources associated with offshore and deep expansion and fishing of lower–trophic-level species and juvenile fish. However, the potential resources have been largely consumed in the East China Sea and South China Sea LMEs, where the ratio of the primary production required to sustain catches to the total primary production (%PPR) was greater than 50%. In contrast, this ratio in the Yellow Sea LME was lower; however, this value was still higher than the sustainable ratio in the Humboldt Current LME. Without proper fisheries management, the three fisheries around China are likely to collapse, as observed in case of the North Sea LME in the 1970s.

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Section: Lessons From the North Sea And Risks To Fisheries Around Chinamentioning

confidence: 99%

Section: Lessons From the North Sea And Risks To Fisheries Around Chinamentioning

confidence: 99%

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

et al. 2022

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“…Food security is at risk, and there is rising apprehension regarding the availability of the food required to meet the needs of the growing population [2,3]. Food production impacts the planet's limited resources, such as farmland and freshwater, both when it comes to the production of vegetable or animal foods [4][5][6][7][8][9], but fisheries also have a huge impact on aquatic ecosystems [10,11]. Climate change also poses serious risks to the sustainable development of the planet and for food production.…”

Section: Introductionmentioning

confidence: 99%

Edible Insects: Perceptions of Marketing, Economic, and Social Aspects among Citizens of Different Countries

Guiné,

Florença,

Costa

et al. 2023

Foods

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Because edible insects (EI) have been, in recent years, recommended as a nutritious animal protein food with enormous environmental advantages over other sources of animal protein for human consumption, studies aimed at investigating the consumer perspective have become more prominent. Hence, this study intended to examine the perceptions of participants from different countries about the commercialization and economic and social impacts of edible insects. The study was made using a questionnaire survey, and data were collected in Brazil, Croatia, Greece, Latvia, Lebanon, Lithuania, Mexico, Poland, Portugal, Romania, Serbia, Slovenia, Spain, and Turkey. The final number of received answers was 7222 participants. For the treatment of the results, different statistical techniques were used: factor analysis, internal reliability by Cronbach’s alpha, cluster analysis, ANOVA to test differences between groups, and Chi-square tests. The results obtained confirmed the validity of the scale, constituted by 12 out of the 14 items initially considered, distributed by 4 factors: the first related to the economic impact of EIs, the second related to the motivation for consumption of EIs, the third related to the places of purchase of EIs, and the fourth corresponding to a question presented to the participants as a false statement. A cluster analysis allowed identifying three clusters, with significant differences between them according to all the sociodemographic variables tested. Also, it was found that the participants expressed an exceptionally high level of agreement with aspects such as the difficulty in finding EIs on sale, knowledge acting as a strong motivator for EI consumption, and the role of personalities and influencers in increasing the will to consume EIs. Finally, practically all sociodemographic variables were found to be significantly associated with perceptions (country, sex, education, living environment, and income), but not age. In conclusion, the perceptions about EI commercialization were investigated and revealed differences among samples originating from different countries. Moreover, the sociodemographic characteristics of the participants were found to be strongly associated with their perceptions.

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“…Current Chilean fishing law establishes as a general management objective of achieving the maximum sustainable yield. However, the concept of MSY for fisheries management has been too widely criticized due to the limited information and an inadequate implementation to prove its theoretical framework (Russell, 1931;Graham, 1934;Gordon, 1954;Schaefer, 1954;Larkin, 1977;Finley, 2007;Legovic et al, 2010;Mesnil, 2012;Finley & Oreskes, 2013;Kar & Gosh, 2013, Steadman et al, 2014. Wiff et al (2016) indicate that the MSY-based management strategies applied to Chilean fisheries do not provide certainty about the specific stock productivity since the BRP is estimated from fixed parameters of stock-recruit relationship (h) and natural mortality (M).…”

Section: Introductionmentioning

confidence: 99%

Optimal fishing mortality assignment for southern hake Merluccius australis in Chile

López

Jiménez²,

Canales³

2020

Lat. Am. J. Aquat. Res.

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Since 1979, southern hake (Merluccius australis) has been exploited in Chile from the Bio Bio to the Magallanes regions, between the parallels 41°28.6'S and 57°S. There is evidence of a constant fishing effort and a sustained reduction of the fish population, consistent with a progressive decrease in total annual catches. Management strategies based on the maximum sustainable yield (MSY) and quota assignment/ distribution criteria have not been able to sustain acceptable biomass levels. A non-linear optimization model with two objective functions was proposed to determine an optimal total catch quota for more sustainable exploitation of this fishery. The first function maximizes the total catch over time in response to an optimal assignment of fishing mortality rates per fleet; the second function maximizes the total economic benefit associated with the total catch. The dynamics of the fish population were represented with the equations of a predictive age-structured model. Decision variables were fishing mortality rates and annual catch quotas per fleet, subject to constraints that guarantee a minimum level of biomass escape over a long-term period. The input parameters were obtained from the last stock evaluation report carried out by the Instituto de Fomento Pesquero (IFOP) of Chile. The historical background data of the fishery and the regulatory framework were relevant aspects of the methodology. Five scenarios were evaluated with the two objective functions, including a base scenario, which considered the referential mortality rate as input data as the average mortality rate per fleet from 2007 to 2012. Total economic benefits fluctuate between 102 and USD 442 million for total catches in the range of 108 to 421 thousand tons, which were obtained from maximizing the economic and biological objective functions. Economic benefit/catch ratios were reduced for scenarios with higher constraints on catch limits, and they were more efficient from a biological point of view. Situations with lighter constraints showed in general higher economic benefits and better performance ratios than those with stronger restrictions. The use of optimization models may provide a useful tool to evaluate the effect of regulations for adequate conservation and economical utilization of a limited resource.

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Minimising unsustainable yield: Ten failing European fisheries

Cited by 12 publications

References 54 publications

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

Edible Insects: Perceptions of Marketing, Economic, and Social Aspects among Citizens of Different Countries

Optimal fishing mortality assignment for southern hake Merluccius australis in Chile

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