Article
Fisheries
Keisuke Satoh, Haikun Xu, Carolina V. Minte-Vera, Mark N. Maunder, Toshihide Kitakado
Summary: This study revealed the size-specific spatiotemporal dynamics of bigeye tuna in the eastern Pacific Ocean, showing spatial segregation by size and different distribution patterns for adult, intermediate size, and juvenile fish. The study also observed spatial restructuring by size in response to El Nino and La Nina events, highlighting the impact of oceanographic conditions on fish distribution and movement.
FISHERIES RESEARCH
(2021)
Article
Environmental Studies
Daniel Solis, Kathryn Bisack, John Walden, Paul Richards, Juan Agar
Summary: This study estimates the economic cost of reducing sea turtle bycatch in the U.S. Western Atlantic Commercial Pelagic Longline Fishery, finding that on average, the cost of reducing the take of one sea turtle is $36,957. Shadow prices show significant temporal variability and vary by the targeting behavior of the fleets, which also affects the technical efficiency of fishing fleets.
Article
Environmental Sciences
Angela Muench, Elena Mengo, Sam Weber, Diane Baum, Andrew James Richardson, Hannah Thomas, Paul Whomersley
Summary: The designation of large scale marine protected areas (MPAs) has become increasingly important in addressing global issues such as biodiversity loss and the conservation of vulnerable marine habitats. This study estimated the monitoring and enforcement costs for the potential closure options of the Exclusive Economic Zone (EEZ) of Ascension Island and found that additional licenses would need to be sold to fund the costs in case of a partial closure. Additionally, the study identified a decline in license sales for the bigeye tuna fishery due to a shift in consumer demand, leading to changes in fishing effort and a decrease in demand for licenses within the Ascension Island EEZ.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
Joseph E. Fader, Jamie A. Marchetti, Robert S. Schick, Andrew J. Read
Summary: Depredation by marine predators in pelagic longline fisheries causes significant economic losses. This study used a novel modeling approach to estimate catch removal by odontocetes in the Hawai'i deep-set longline fishery and found that depredation resulted in approximately 100 tons of lost biomass and 1 million USD in economic value during 2012-2018. The study also identified spatiotemporal patterns and hotspots of depredation, providing valuable insights for assessing the impacts of depredation in similar fisheries.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Fisheries
Smit Vasquez Caballero, Gil Sylvia, Daniel S. Holland
Summary: This study used a random utility maximization framework to model the behavior of fishermen in terms of participation, fishery choice, and location choice. The study demonstrated substitution effects across fisheries due to spatial policies implemented in the salmon fishery. It suggests that spatial management of a single fishery needs to consider fishermen's full choice set in order to predict their behavioral responses to spatial policies. The analysis also provides insights into how fishermen construct multifishery harvest strategies.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Biodiversity Conservation
Qinqin Lin, Yong Chen, Jiangfeng Zhu
Summary: In this study, a semi-quantitative PSA approach was used to assess the vulnerability of 24 species caught by the Chinese tuna longline fishery in the EPO, with 5 species identified as highly vulnerable and the rest as moderately vulnerable. The PSA results showed good concurrence with all longline fisheries in the EPO, but differed significantly from EASI, highlighting the need for more reliable data for quantitative assessments.
ECOLOGICAL INDICATORS
(2022)
Article
Fisheries
Amael Dupaix, Manuela Capello, Christophe Lett, Marco Andrello, Nicolas Barrier, Gaelle Viennois, Laurent Dagorn
Summary: The introduction of fish aggregating devices by industrial tuna purse seine vessels has greatly increased the number of natural floating objects, with FADs representing over 85% of the total. Research shows that the use of FADs has significantly altered the density and spatial distribution of FOBs, emphasizing the need for further investigation into the potential ecological impacts on associated species.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Fisheries
Vicenc Molto, Ignacio A. Catalan, Andres Ospina-Alvarez, Pilar Hernandez, Ruben H. Roa-Ureta
Summary: Generalized depletion models are useful for managing data-limited fisheries and have been applied to the Mediterranean common dolphinfish fishery. A multiannual five-fleet model was developed using monthly data from 2008 to 2019. The results show high natural mortality rate and intra-season fluctuations in biomass, but indicate that the stock is fished within sustainable limits.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Fisheries
Eric Gilman, Milani Chaloupka, Asuka Ishizaki, Mathew Carnes, Hollyann Naholowaa, Colby Brady, Sarah Ellgen, Eric Kingma
Summary: The study found that using tori lines significantly reduced the likelihood of albatross attempting to contact or actually contacting baited hooks. While albatross captures were also less likely in sets with tori lines, there were not enough captures to draw strong conclusions. Offal discharge during setting was associated with higher seabird interactions, but further investigation is needed to determine the efficacy of this mitigation measure.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2021)
Article
Fisheries
Tianjiao Zhang, Liming Song, Hongchun Yuan, Bo Song, Narcisse Ebango Ngando
Summary: When predicting the habitat preferences of bigeye tuna in the Indian Ocean using gridded fishery data and environmental factors, Generalized Additive Models (GAMs) may be more suitable than the Maximum Entropy Model (MaxEnt), and vertical temperature, dissolved oxygen concentration, and thermocline depth are reliable predictors.
FISHERIES OCEANOGRAPHY
(2021)
Article
Oceanography
Hollie Booth, George Powell, Irfan Yulianto, Benaya Simeon, Muhsin, Luky Adrianto, E. J. Milner-Gulland
Summary: This study explores the cost-effectiveness of management measures for mitigating the capture of threatened shark species in a small-scale longline shark fishery in Indonesia. The results suggest that fishery closures, depth limits, hook limits, and gear restrictions could have a positive conservation impact, but there are trade-offs between different species.
OCEAN & COASTAL MANAGEMENT
(2022)
Article
Fisheries
Morteza Eighani, Jason M. Cope, Paria Raoufi, Reza Abbaspour Naderi, Pascal Bach
Summary: The predominant policy for remedying the world fishing crisis aims at maximum sustainable yield (MSY) by adjusting gear selectivity and fishing effort to maintain sustainable stock levels. Despite limited data, population models consistently indicate a sharp decline in population status since the beginning of the time-series across a variety of assumptions on stock productivity and life history. The yellowfin tuna population in 2019 is below estimated MSY reference points for current relative stock size, and over the fishing intensity at MSY, indicating current overfishing. Adjusting the interactions of that fishery with the population, while continuing to collect biological composition data representative of each fleet in the fishery, will help mitigate current stock decline and provide the ability to refine future population status determination and forecasts through more informed stock assessments.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Environmental Studies
Christopher J. Brown, Amelia Desbiens, Max D. Campbell, Edward T. Game, Eric Gilman, Richard J. Hamilton, Craig Heberer, David Itano, Kydd Pollock
Summary: Accurate fisheries catch data is crucial for sustainable management of tuna fisheries. Electronic monitoring (EM) can help fill the gap in observer data, providing more diverse species data and comparable catch rates to human observers. Further expansion of EM could lead to improved management of both target and bycatch species.
Article
Fisheries
Iratxe Rubio, Alistair J. Hobday, Elena Ojea
Summary: This study examines individual adaptation in the large-scale fisheries, focusing on the Spanish tropical tuna fishery. The survey results show that over half of the skippers have adapted to climate change over the past decade by using new technology and expanding their fishing area. Cluster analysis identifies two groups of skippers who would either follow adaptation or transformation strategies based on different hypothetical scenarios. Skipper characteristics, such as intergenerational knowledge, perceptions of tuna abundance, and years of experience, explain their adaptation and transformation choices.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Biodiversity Conservation
Jiaqi Wang, Chunxia Gao, Feng Wu, Xiaodi Gao, Jessica Chen, Xiaojie Dai, Siquan Tian, Yong Chen
Summary: In the Pacific Ocean, the bycatch and discard patterns of Chinese tuna longline fleets were analyzed using observer data. Other bony fishes and sharks were the most common bycatch species, and the bigeye tuna fleet had higher bycatch and discard rates compared to the albacore fleet. Bycatch of marine turtles and mammals mainly occurred in the Tropical Pacific, while seabird bycatch was more common in the Temperate Pacific.
BIOLOGICAL CONSERVATION
(2021)
Review
Engineering, Environmental
Gabriela Scheufele, Sean Pascoe
Summary: The paper discusses the competition between commercial fishing and recreational fishing for marine resources and introduces two common methods to support allocation decisions for recreational fishing.
Article
Agricultural Economics & Policy
Peggy Schrobback, Eriko Hoshino, Sean Pascoe, Robert Curtotti
Summary: This study found that imported fish, particularly fresh imports, are cointegrated with Australian produced fresh fish supplies traded in the Sydney Fish Market (SFM), suggesting a partial substitution relationship between imports and domestically caught fish. This implies that prices of domestically produced fish within the Australian market are likely impacted by price dynamics within the international seafood market.
AUSTRALIAN JOURNAL OF AGRICULTURAL AND RESOURCE ECONOMICS
(2022)
Article
Fisheries
Eriko Hoshino, Peggy Schrobback, Sean Pascoe, Robert Curtotti
Summary: This article examines the impact of the Southern and Eastern Scalefish and Shark Fishery (SESSF) on the Sydney and Melbourne markets, exploring differences between the two major fish markets in Australia through analysis of historical price data. The study provides insights for bioeconomic modeling to identify MEY-based targets in the future.
FISHERIES RESEARCH
(2021)
Article
Fisheries
Sean Pascoe, Eriko Hoshino, Trevor Hutton, Alistair J. Hobday
Summary: Individual transferable quotas (ITQs) have been introduced to address stock management challenges in fisheries, but they also bring about unexpected economic and social outcomes. An inquiry conducted in Australia revealed that individual fishers had negative perceptions of ITQs, while industry organizations and others were mostly positive. Concerns were raised about social issues, particularly the ownership of quotas by non-fishers.
MARINE AND FRESHWATER RESEARCH
(2022)
Article
Agricultural Economics & Policy
Sean Pascoe, Peggy Schrobback, Eriko Hoshino, Robert Curtotti
Summary: This study develops a dynamic Inverse Almost Ideal Demand System model to analyze the price flexibilities of wild-caught fish, Australian farmed salmon, and imported fresh and frozen fish. The findings suggest that the growth of fresh fish imports and Australian farmed salmon production have negatively affected the prices received for Australian wild-caught species, especially those with lower value.
EUROPEAN REVIEW OF AGRICULTURAL ECONOMICS
(2023)
Article
Fisheries
Trevor Hutton, Sean Pascoe, Roy A. Deng, Andre E. Punt, Shijie Zhou
Summary: The Northern Prawn Fishery is one of Australia's valuable federally managed fisheries, with over 40 years of modeling experience. The current management model may have bias due to the lack of explicit inclusion of banana prawns. Research shows that banana prawns are the key driver of fishery profit.
FISHERIES RESEARCH
(2022)
Article
Fisheries
Sean Pascoe, Andre E. Punt, Trevor Hutton, Paul Burch, Pia Bessell-Browne, L. Richard Little
Summary: Consideration of economic outcomes is common in fisheries management globally, but few jurisdictions prioritize economic objectives. Australia's federally managed fisheries have adopted maximum economic yield (MEY) as their primary objective, with biomass-based target reference points used in harvest control rules. In the absence of explicit estimates for biomass-based MEY (BMEY), proxy estimates based on maximum sustainable yield (BMSY) are used. However, estimating BMEY in multi-species fisheries is challenging due to assessments conducted at the individual species level, while economic activity spans across species. This complexity is further compounded in fisheries with multiple fishing gears and targeting practices. Using an age-structured bioeconomic model, this study estimates BMEY for key species in a multi-species, multi-metier fishery, revealing higher optimal biomass levels compared to the current proxy-based system, with economic targets sensitive to changing prices and fishing costs.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Green & Sustainable Science & Technology
Amar Doshi, Sean Pascoe, Louisa Coglan, Thomas J. Rainey
Summary: The sustainability of biofuels as substitutes for petrol and diesel is questionable due to economic and environmental issues in their production lifecycle. This study estimates the value of externalities associated with different types of biofuel feedstock using a sample of Australian fuel consumers. The results suggest that newer biofuel feedstock, like microalgae, can generate high consumer values compared to agricultural-based predecessors. Consumers are willing to pay more for biofuels that avoid a 10% increase in food prices and have low lifecycle emissions. Existing biofuel policies and higher incomes have contradictory associations with consumer values. The findings should inform biofuel policies to encourage the development of a more diversified range of feedstock and related technologies for more sustainable fuel alternatives.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2023)
Article
Environmental Studies
Sean Pascoe, Toni Cannard, Natalie A. Dowling, Catherine M. Dichmont, Frank Asche, L. Richard Little
Summary: Marine ecosystem-based management aims to satisfy various economic, social, and environmental objectives. Traditional multi-criteria decision analysis is often limited in identifying a preferred option due to non-commensurable units of measurement. Data envelopment analysis (DEA) offers an alternative approach by deriving composite indicator scores for multiple outputs in management alternatives. DEA allows for flexible benefit of the doubt weights and the incorporation of undesirable outcomes in the analysis.
Article
Computer Science, Artificial Intelligence
Sean Pascoe
Summary: Inconsistencies in the comparison matrix can be a common problem in studies, but researchers have developed a simple algorithm to address this issue and have demonstrated its effectiveness through example cases.
Article
Agricultural Economics & Policy
Sean Pascoe, Lukas Danner, Thejani Gunaratne, Tiana Pang, Peggy Schrobback, Tim Perrin, Polly Hilder
Summary: Assessing the potential economic and financial feasibility of a new aquaculture operation requires estimating the expected price of a species being considered for aquaculture, but which does not have a current market presence. In this study, a hedonic pricing model is developed using information on a wide range of other species currently traded in the market. The model includes characteristics such as product form and taste, and four different functional forms are applied to estimate the likely market price of the new species.
AQUACULTURE ECONOMICS & MANAGEMENT
(2023)
Article
Fisheries
Sean Pascoe, Samantha Paredes, Louisa Coglan
Summary: This study finds that the fishing industry in a coastal community in Queensland, Australia, contributes significantly to tourism, generating welfare gains and additional expenditure for visitors.
Article
Ecology
Gabriela Scheufele, Sean Pascoe
Summary: The United Nations Statistical Commission has adopted the chapters 8-11 of the SEEA EA as the international standards for valuing ecosystem services and assets. This presents new challenges for environmental economists. Ecosystem accounts and National Accounts both focus on exchange value rather than welfare value, and we apply the SEV method with the travel cost method to derive exchange prices and values for recreation-related services.
ECOLOGICAL ECONOMICS
(2023)
Article
Fisheries
Sean Pascoe, Samantha Paredes, Louisa Coglan
Summary: The Australian fishing industry is facing challenges from cheaper imports and the COVID-19 pandemic, and is exploring ways to improve its economic viability. Local seafood promotion has been successful elsewhere and may create opportunities for fishermen to tap into a previously underutilized market. This study investigates the willingness to pay for the attribute of "local" in comparison to sustainability and freshness when purchasing fish, using a choice experiment with Queensland seafood consumers. The results show that freshness is the most important attribute, followed by sustainability and then origin. Consumers from regional coastal areas are willing to pay more for locally produced fish, while those from metropolitan areas are less concerned about product origin. Developing a local label may serve as a proxy indicator for freshness and sustainability, benefiting both fishermen and consumers.
FISHERIES RESEARCH
(2023)
Article
Business
Quang Van Nguyen, Sean Pascoe, Louisa Coglan, Son Nghiem
Summary: This study focuses on examining the sensitivity of technical and scale efficiency estimates in stochastic frontier analysis to model choices. The results indicate that distributional assumptions and the choice of time effects have significant impacts on efficiency estimates.
JOURNAL OF PRODUCTIVITY ANALYSIS
(2021)