Article
Fisheries
Keno Ferter, Hakon Ottera, Mary Christman, Alf Ring Kleiven, Marc Simon Weltersbach, Sofie Gundersen, Christine Djonne, Otte Bjelland, Bruce Hartill, Jeremy Lyle, Kieran Hyder, Trude Borch, Jon Helge Volstad
Summary: Marine recreational fishing in Norway faces challenges in estimating catches due to its long coastline and large tourist fishery. This study conducted surveys to monitor recreational anglers, estimate their catches, and evaluate the fishery in Troms and Hordaland County. The results showed differences in catches between the two regions and revealed that recreational anglers in Hordaland harvest more cod in coastal waters than commercial fishers. This study provides valuable information for developing monitoring methods and supporting science-based fisheries management.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Editorial Material
Ecology
Nils C. Krueck
Summary: A study warns that concentrated fishing near marine protected areas can hinder population recovery both within and beyond the protected areas.
NATURE ECOLOGY & EVOLUTION
(2021)
Article
Environmental Sciences
Eneko Bachiller, Maria Korta, Maria Mateo, Estanis Mugerza, Lucia Zarauz
Summary: This study assessed marine recreational fisheries (MRF) along the coastal villages of the Basque Country, focusing on shore fishing, boat fishing, and spearfishing. The findings revealed that shore fishing was the most widespread activity, while spearfishing showed higher species diversity. The study also highlighted the frequent capture of unassessed species, emphasizing the importance of incorporating multispecies sampling schemes in future MRF assessments.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Giulia Dapueto, Francesco Massa, Christine Pergent-Martini, Paolo Povero, Ilaria Rigo, Paolo Vassallo, Sara Venturini, Chiara Paoli
Summary: Recreational boating plays an important role in the global leisure activities, but it also causes significant environmental damage, especially in the absence of proper management. This study aims to provide an environmentally focused accounting model to evaluate the net impact of anchoring on sensitive habitats. The model considers factors such as habitat type, seabed compactness, number and size of boats, and anchor type to evaluate the net impact and assess the sustainability status of marine protected areas.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Marine
Yongming Tan, Shangyou Lou
Summary: This study proposes a novel design of a large-scale marine ranch system, which effectively addresses the challenges facing the marine aquaculture industry by integrating marine resources and ecosystem-based environmental supporting facilities. The system includes a multifunctional management platform, deep-sea cage group, and environmental supporting facilities, aiming to achieve sustainable development through advanced technology and ecological concepts. Preliminary results suggest that the design goals can be basically achieved, contributing to the sustainable development of the industry and maximizing comprehensive benefits.
Article
Biodiversity Conservation
Benn J. Hanns, Tim Haggitt, Nick T. Shears
Summary: Fisheries stock assessments based on fisheries dependent data often have high uncertainty. This study proposes using marine reserves as a proxy for unfished biomass to assess stock status. The study shows that lobster populations in fished areas adjacent to marine reserves have significantly lower catch rates and biomass compared to unfished levels, suggesting that marine reserves can provide valuable information for stock assessments.
BIOLOGICAL CONSERVATION
(2022)
Article
Fisheries
Holden E. Harris, Brian K. Whalen, Andrew G. Gude, Micheal S. Allen
Summary: Discard mortality can make fishing unsustainable, but modified hooks, specifically bite-shortened hooks, have shown to improve landing success and self-release rates in released fish, potentially allowing for sustainable recreational fishing opportunities in sensitive areas.
Article
Environmental Studies
Molly Morse, Douglas Mccauley, Sara Orofino, Keenan Stears, Samantha Mladjov, Jenn Caselle, Tyler Clavelle, Ryan Freedman
Summary: Based on vessel data and surveys, this study reveals the benefits of marine protected areas (MPAs) for the scuba diving industry in Southern California and emphasizes the importance of involving the ecotourism industry in MPA management decisions.
Article
Environmental Sciences
J. Assis, E. Fragkopoulou, E. A. Serrao, B. Horta e Costa, M. Gandra, D. Abecasis
Summary: The need for international cooperation in marine resource management and conservation to establish effective networks of Marine Protected Areas has been highlighted. Research shows inadequate connectivity in the European network of marine reserves, especially for ecosystemstructuring species with high isolation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biodiversity Conservation
Shelby L. Ziegler, Rachel O. Brooks, Scott L. Hamilton, Benjamin I. Ruttenberg, Jennifer A. Chiu, Ryan T. Fields, Grant T. Waltz, Chenchen Shen, Dean E. Wendt, Richard M. Starr
Summary: Marine protected areas (MPAs) are established worldwide to mitigate the effects of various stressors on marine communities. This study found that the impacts of MPAs on fish communities are influenced by fishing pressure and environmental factors. Specifically, MPAs have the strongest positive effects on heavily exploited fish communities. Therefore, it is important for managers to consider both human-induced stressors and environmental conditions when establishing MPAs, as well as implement long-term monitoring programs to assess their functionality.
BIOLOGICAL CONSERVATION
(2022)
Article
Environmental Sciences
Mariana Cardoso-Andrade, Henrique Queiroga, Mafalda Rangel, Ines Sousa, Adela Belackova, Luis Bentes, Frederico Oliveira, Pedro Monteiro, Nuno Sales Henriques, Carlos M. L. Afonso, Ana F. Silva, Bernardo R. Quintella, Jose L. Costa, Miguel P. Pais, Sofia Henriques, Marisa I. Batista, Gustavo Franco, Emanuel J. Goncalves, Miguel Henriques, Teresa Leonardo, Paula Coelho, Robert Comas-Gonzalez, Laura P. Fernandez, Carla Quiles-Pons, Andre Costa, Cristina Espirito-Santo, Joao J. Castro, Francisco Arenas, Sandra Ramos, Vasco Ferreira, Jorge M. S. Goncalves, Barbara Horta e Costa
Summary: This paper describes a structured expert-based methodology for co-defining a list of multidisciplinary Marine Protected Area (MPA) performance indicators. The proposed methodology can support future processes aiming to define and prioritize MPA performance indicators.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
B. K. Varnes, E. M. Olsen
Summary: The biodiversity of an ecosystem is crucial for maintaining its key functions during environmental change. This study compared fish species composition, richness, diversity, catch per unit effort (CPUE), and fish size between a 1.5 km(2) no-take marine protected area (MPA) and a nearby fished area on the southern Norwegian coast over a decade. The study found no significant effect of protection on species richness, diversity, or evenness. However, there was a significant decline in the mean body size of selected species in the MPA, indicating a response to protection involving trophic interactions. The MPA had no significant effect on the CPUE or body size of Atlantic cod, suggesting that the small size of the MPA may limit its effectiveness.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Biodiversity Conservation
Joshua G. Smith, Christopher M. Free, Cori Lopazanski, Julien Brun, Clarissa R. Anderson, Mark H. Carr, Joachim Claudet, Jenifer E. Dugan, Jacob G. Eurich, Tessa B. Francis, Scott L. Hamilton, David Mouillot, Peter T. Raimondi, Richard M. Starr, Shelby L. Ziegler, Kerry J. Nickols, Jennifer E. Caselle
Summary: Marine protected areas (MPAs) have limited ability to enhance ecological resilience to climate change, according to a study conducted in the largest MPA network off the coast of California. While rocky intertidal habitats showed significant resistance to a marine heatwave, other habitats did not exhibit habitat-wide resistance or recovery.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Oceanography
Fan Liu, Yan Huang, Ling Zhang, Gen Li
Summary: Based on data from China's coastal areas, this paper constructs a model to study the relationship among marine environmental pollution, aquatic products trade, and marine fishery economy. The results show that marine environmental pollution and aquatic products trade have a certain inhibitory effect on the marine fishery economy, while the development of fishery economy and increase in aquatic products trade contribute to the improvement of marine environmental pollution.
OCEAN & COASTAL MANAGEMENT
(2022)
Article
Fisheries
Caren Barcelo, J. Wilson White, Louis W. Botsford, Alan Hastings
Summary: This research developed a two-patch, age-structured population model based on a renewal equation approach to predict the impact of increased fish abundance in no-take MPAs on fishery yields. Results show that the time-lag between peak biomass in MPAs and increased fishery yields outside MPAs is predictable, depending on factors such as growth patterns and fishing mortality. This model provides broadly applicable guidance for understanding the relationship between MPAs and fishery yields.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Fisheries
Samuel Shephard, Charles J. List, Robert Arlinghaus
Summary: Recreational anglers play a crucial role in aquatic conservation, but their importance is often overlooked. Recreational fishing not only involves environmental and moral implications, but also requires skills and ethical imperatives associated with sustainable and responsible use of fish populations. Marginalizing anglers could undermine aquatic biodiversity conservation, as they have a unique ability to develop care and responsibility for aquatic systems and bridge the gap between values and actions through local capacities.
FISH AND FISHERIES
(2023)
Article
Fisheries
Wolf-Christian Lewin, Marc Simon Weltersbach, Kevin Haase, Robert Arlinghaus, Harry V. Strehlow
Summary: This study found that the western Baltic cod population collapsed in 2016/17, which led to the introduction of a bag limit in recreational fishing. However, the number of anglers and catch rates showed weak correlation with cod stock biomass, indicating that this fishery-related indicator was more responsive to the bag limit than stock status. The study highlights the importance of long-term monitoring programs for identifying change points in recreational fisheries and improving fisheries management in the future.
FISHERIES RESEARCH
(2023)
Article
Behavioral Sciences
Tamal Roy, Tabea Rohr, Robert Arlinghaus
Summary: Selective harvesting in fisheries can evolutionarily alter the life history and behavior of exploited fish populations. Our study on zebrafish showed that size-selective harvesting led to slower associative learning but faster decision-making in the large-harvested line. These results suggest that size-selective fishing can affect the cognitive abilities of exploited fish stocks, potentially impacting resource acquisition and survival.
BEHAVIORAL ECOLOGY
(2023)
Article
Biodiversity Conservation
Paul Castagne, Ivan Paz-Vinas, Stephanie Bouletreau, Jessica Ferriol, Geraldine Loot, Charlotte Veyssiere, Robert Arlinghaus, Robert Britton, Marlene Chiarello, Emili Garcia-Berthou, Pavel Horky, Delphine Nicolas, Annamaria Nocita, Oscar Nordahl, Michaël Ovidio, Filipe Ribeiro, Ondrej Slavik, Chloe Vagnon, Simon Blanchet, Frederic Santoul
Summary: Biological invasions are a significant component of global change, but they can also have negative impacts on native populations. Efficient management policies are needed to prevent the spread of invasive species in non-native areas while protecting native populations. Genetic variation analysis can help assess the genetic state, identify invasion pathways, determine management strategies, and identify populations requiring conservation measures.
BIODIVERSITY AND CONSERVATION
(2023)
Review
Fisheries
J. Robert Britton, Adrian C. Pinder, Josep Alos, Robert Arlinghaus, Andy J. Danylchuk, Wendy Edwards, Katia M. F. Freire, Casper Gundelund, Kieran Hyder, Ivan Jaric, Robert Lennox, Wolf-Christian Lewin, Abigail J. Lynch, Stephen R. Midway, Warren M. Potts, Karina L. Ryan, Christian Skov, Harry V. Strehlow, Sean R. Tracey, Jun-ichi Tsuboi, Paul A. Venturelli, Jessica L. Weir, Marc Simon Weltersbach, Steven J. Cooke
Summary: The global COVID-19 pandemic led to restrictions on people's movements in many jurisdictions, affecting recreational angling. After the restrictions were lifted, initial surveys suggested increased participation and altered angler demographics, but evidence remained limited. This study examines changes in angling interest, licence sales, and angling effort in different regions during the 'pre-pandemic,' 'acute pandemic,' and 'COVID-acclimated' periods. It suggests that efforts to retain younger anglers and provide more urban angling opportunities could increase overall participation levels and enhance resilience in recreational fisheries.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2023)
Article
Multidisciplinary Sciences
Johannes Radinger, Sven Matern, Thomas Klefoth, Christian Wolter, Fritz Feldhege, Christopher T. Monk, Robert Arlinghaus
Summary: Ecosystem-based management is costly, but its effectiveness compared to traditional species-focused alternatives in conservation is uncertain. This study conducted large-scale experiments in fish conservation, finding that adding coarse woody habitats did not enhance fish abundance, while creating shallow water habitat consistently improved the abundance of juvenile fish. Species-focused fish stocking as an alternative approach completely failed. The findings question the efficacy of species-focused conservation actions in aquatic ecosystems, and recommend ecosystem-based habitat management.
Article
Fisheries
Harry V. Strehlow, Artem Korzhenevych, Jorrit Lucas, Wolf-Christian Lewin, Marc Simon Weltersbach, Carsten Riepe, Robert Arlinghaus
Summary: This study estimated the number and expenditures of German marine recreational anglers, and compared the economic impacts of resident and nonresident anglers in coastal and transitional brackish waters in northeastern Germany. The results showed that recreational fishing has a significant contribution to the local and regional economies, with nonresident anglers having a greater economic impact.
FISHERIES MANAGEMENT AND ECOLOGY
(2023)
Article
Fisheries
Timo D. Rittweg, Clive Trueman, Elias Ehrlich, Michael Wiedenbeck, Robert Arlinghaus
Summary: Accurate age estimates are crucial for assessing fish life histories and providing management advice. This study validated age estimates for northern pike using oxygen isotopes and found that estimates from scales significantly underestimated the age of older fish. This underestimation has implications for population models and management regulations, leading to conservative management and lost yield.
FISHERIES MANAGEMENT AND ECOLOGY
(2023)
Article
Fisheries
Catherine Slaton, Dieter Koemle, Max Birdsong, Robert Arlinghaus
Summary: Understanding the attitudes of recreational anglers is crucial for fisheries management. In this study, we examined the relationship between angler characteristics (specialization, catch orientation, place attachment, and demographics) and attitudes towards conservation and management of northern pike in Germany. Our results showed that angler specialization, catch orientations, place attachment, and demographics were consistent predictors of attitudes towards management and conservation. Addressing conflicts in the pike fishery can be achieved by targeting specialized and release-oriented anglers who have higher conflict sensitivity and are more willing to accept regulations.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Robert Arlinghaus, Timo Rittweg, Felicie Dhellemmes, Dieter Koemle, Rob van Gemert, Hendrik Schubert, Dominique Niessner, Soren Moeller, Jan Droll, Rene Friedland, Wolf-Christian Lewin, Malte Dorow, Linda Westphal, Elias Ehrlich, Harry V. Strehlow, Marc Simon Weltersbach, Phillip Roser, Marlon Braun, Fritz Feldhege, Helmut Winkler
Summary: We conducted a comprehensive review of literature on the small-scale northern pike fishery in lagoon ecosystems in the southern Baltic Sea, including peer-reviewed work, grey literature, and novel data analyses. Our findings have important implications for the management of mixed commercial-recreational fisheries in coastal areas. The decline of the pike stock in these lagoons is attributed to multiple pressures such as overharvest, loss of stock structure, eutrophication, predation mortality, availability of prey, and climate change.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Colm J. Fitzgerald, Jan S. Droll, Samuel Shephard, Christopher T. Monk, Timo Rittweg, Robert Arlinghaus
Summary: The objective of this study was to assess the exploitation status of the northern pike fishery in brackish lagoons in the southern Baltic Sea of Germany. Length structure data and empirical estimates of growth, maturation, and fecundity were used to fit the Length-Based Spawning Potential Ratio (LB-SPR) model. The study emphasizes the importance of unbiased growth and natural mortality estimates when using length-based methods for stock assessment.
FISHERIES RESEARCH
(2023)
Article
Limnology
S. Matern, C. Robichon, R. Nikolaus, C. T. Monk, R. Arlinghaus
Summary: This study investigates the density of coarse woody habitat (CWH) in 26 gravel pit lakes in Lower Saxony, Germany. The study finds that CWH density is lower in German gravel pit lakes compared to North American natural lakes. The presence of large trees on the shore and wind direction have a positive impact on CWH density in lakes managed for recreational fisheries, while lake age and density of large trees on the shore and wind from land positively affect the density of large CWH. Recreational fisheries managers and individual anglers are recommended to maintain CWH in shallow littoral zones to promote fish habitats in generally low-structured gravel pit lakes.
LAKE AND RESERVOIR MANAGEMENT
(2023)
Review
Ecology
Robert J. Lennox, Kim Aarestrup, Josep Alos, Robert Arlinghaus, Eneko Aspillaga, Michael G. Bertram, Kim Birnie-Gauvin, Tomas Brodin, Steven J. Cooke, Lotte S. Dahlmo, Felicie Dhellemmes, Karl o. Gjelland, Gustav Hellstrom, Henry Hershey, Christopher Holbrook, Thomas Klefoth, Susan Lowerre-Barbieri, Christopher T. Monk, Cecilie Iden Nilsen, Ine Pauwels, Renanel Pickholtz, Marie Prchalova, Jan Reubens, Milan Riha, David Villegas-Rios, Knut Wiik Vollset, Samuel Westrelin, Henrik Baktoft
Summary: This paper provides an overview of the method of geolocating aquatic animals with acoustic tags, including considerations for designing receiver arrays, testing performance, synchronizing receiver clocks, and calculating positions from detection data. Common positioning algorithms, including open-source solvers and manufacturer-provided "black-box" methods, are also introduced. It is the first comprehensive overview of methods and considerations for designing and implementing better positioning studies in aquatic systems, aiming to support users and encourage further advances in knowledge.
METHODS IN ECOLOGY AND EVOLUTION
(2023)
Editorial Material
Ecology
Ivan Jaric, Robert J. Lennox, Marie Prchalova, Christopher T. Monk, Milan Riha, Ran Nathan, Robert Arlinghaus
Article
Environmental Sciences
Dieter Koemle, Birgit Gassler, Gerard Kyle, Juergen Meyerhoff, Robert Arlinghaus
Summary: This paper examines the relationship between involvement in recreational fishing and decision rules, specifically regret-minimizing versus utility-maximizing behavior. The study finds that individuals who are more involved in fishing are more likely to exhibit regret-minimizing behavior. Factors such as behavioral commitment and psychological involvement are significantly related to the decision rule, while skills, attitudes, and place attachment do not impact the decision rules followed. The study also demonstrates that welfare estimates of policy changes are influenced by the decision rule, and assuming regret-minimizing behavior results in lower estimates compared to assuming utility maximization behavior.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
