Article
Fisheries
Steven J. Cooke, Benjamin W. C. Cooke, Joshua T. H. Cooke, Cameron J. A. Cooke, Luc LaRochelle, Andy J. Danylchuk, Sascha Clark Danylchuk, Robert J. Lennox
Summary: Dehooking tools and bare hands were compared for their efficacy in removing hooks from Bluegill fish caught with barbed and barbless hooks. Bare hands took the longest time, while there was little difference in dehooking times among the tools used. However, using tools resulted in more tissue tearing compared to bare hands. Barbed hooks took significantly longer to remove than barbless hooks, and there was an increase in tissue tear size for fish caught on barbed hooks. Larger fish took longer to dehook, but tearing was not size-dependent. Bleeding incidence was low and not significantly different among treatments. Reflex impairment was observed only in fish caught on barbed hooks with longer dehooking times. Overall, using barbless hooks is more important than the specific dehooking tool used.
FISHERIES RESEARCH
(2023)
Article
Entomology
Jessica L. Kerr, Georgia Dickson, Brooke C. O'Connor, Chanatda Somchit, Jon Sweeney, Stephen M. Pawson
Summary: Early detection of bark- and wood-boring beetles is crucial for eradicating newly established populations in new regions. Flight intercept traps baited with semiochemical lures are essential for monitoring and surveillance of introduced insects. This study presents findings on potential improvements in trap sensitivity and attraction of different beetle species to host-plant volatiles and semiochemical blends.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2022)
Article
Fisheries
Alexandria T. Trahan, Auston D. Chhor, Michael J. Lawrence, Jacob W. Brownscombe, Daniel M. Glassman, Connor H. Reid, Alice E. I. Abrams, Andy J. Danylchuk, Steven J. Cooke
Summary: In this study, it was found that using carbonated beverages increased the duration and intensity of bleeding in injured fish, regardless of the type of beverage or season. Chilled versus ambient-temperature beverages also had no influence on outcomes.
NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT
(2021)
Article
Fisheries
Samuel A. Blyth, Shannon D. Bower
Summary: This study investigated the biophysical responses of sea run brown trout to catch-and-release fishing in Sweden. The results suggest low rates of post-release mortality and generally limited stress responses to angling events, but also highlight situations where stress responses may be compounded and anglers should take additional action to reduce sublethal physiological disturbances and the risk of delayed mortality.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Engineering, Multidisciplinary
Vincent Mokoana, Joseph Asante, Jonathan Okonkwo
Summary: Firefighting bunker gear is made of flame-retardant materials to resist ignition and delay flame spread, with concerns rising over potential harmful effects of brominated flame retardants. Analysis found bromine present in all samples, with new garments showing higher thermal performance and lower concentrations of flame retardants.
JOURNAL OF FIRE SCIENCES
(2021)
Article
Engineering, Mechanical
Nandu V. Namboothiri, P. Marimuthu, S. Suresh Kumar
Summary: Gears are crucial components in various mechanical machines, cars, and wind mills. This study investigates the effect of backup ratio on the fatigue crack behavior of symmetric and asymmetric spur gears under mixed-mode fracture. The findings show that the fracture resistance of gears increases with an increase in rim thickness and backup ratio, leading to improved crack stability.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Nandu Namboothiri, P. Marimuthu
Summary: Variations in design parameters and methodology significantly affect the fracture characteristics of spur gear. The study investigates the fracture properties of a direct designed asymmetric high contact ratio (AHCR-DD) spur gear and compares it with conventional designs. The AHCR-DD spur gear exhibits higher fracture resistance and a parametric study provides useful information for gear design.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Composites
Mehdi Farajpour, Mehdi Ahmadi Najafabadi
Summary: The mechanical behavior and propagation of the initial crack of Mode-I in carbon/epoxy filament wound (FW) composite curve beams were studied using the acoustic emission (AE) method. The momentary position of the interlayer delamination tip during growth was predicted by determining the speed of the AE waves and providing a method to filter unwanted signals. The results showed the significant influence of fiber bridging length on the Mode-I delamination fracture toughness, and good agreement was observed between the fracture toughness values obtained from the AE method and the standard ASTM D5528.
JOURNAL OF COMPOSITE MATERIALS
(2023)
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)
Article
Fisheries
F. Dhellemmes, E. Aspillaga, T. Rittweg, J. Alos, P. Moeller, R. Arlinghaus
Summary: The spatial behavior of coastal pike living in brackish lagoons is not well-known. This study analyzed two years of acoustic telemetry data to investigate the relationship between spatial behavior, body size, sex, season, and vulnerability to fishing in a sample of coastal pike from the Baltic Sea. The results showed that body size and other factors influenced the space use patterns of pike, with larger fish using more space and differences in behavior between sexes and seasons.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Philipp Czapla, Magnus Loven Wallerius, Christopher T. Monk, Steven J. Cooke, Robert Arlinghaus
Summary: This study examined the duration of memory and hook avoidance behavior in fish after being caught and released. Previous research suggested that in carp, one hooking event could cause hook avoidance for over a year. However, this study found that individual experiences of hooking led to longer pick-up times for bait without hooks after 7 months, indicating a more cautious approach to hooks. In contrast, social hooking experiences were forgotten by carp after about half a year.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Thang Dao, Martin Quaas, Dieter Koemle, Elias Ehrlich, Robert Arlinghaus
Summary: The rarity of a good can increase its price and motivate harvesters to exploit the fish stock even at low stock sizes. This study examines the impact of price feedbacks on the bioeconomic equilibrium in a commercial fishery and shows that alternative stable steady states and a tipping point may emerge due to dynamic interactions between the market price of fish, fish population growth, and fishers' decisions. High benefits associated with fishing and conditions such as high prices at low stock sizes or low opportunity costs of fishing can contribute to the maintenance of fishing pressure even at low stock sizes. The study also discusses the conditions that predispose a tipping point under regulated open access and suggests that reorganization of a fishery and the number of fishers can trigger alternative stable steady states and destabilization of a fishery.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Thomas Klefoth, Nicola Wegener, Juergen Meyerhoff, Robert Arlinghaus
Summary: Perceptions about fishery management directions can differ between anglers and fisheries managers. In Germany, the interaction between anglers and elected fisheries managers in fishing clubs is particularly strong. A survey conducted in Lower Saxony revealed that while both anglers and fisheries managers supported conservation objectives and pro-stocking beliefs, they differed in their pro-ecological beliefs and the perceived functionality of habitat management and harvest regulations. Conflicts may arise when decisions deviate from anglers' perceptions, and joint experiments in fisheries management could help bridge the gap.
FISHERIES RESEARCH
(2023)
Article
Marine & Freshwater Biology
A. Maday, S. Matern, C. T. Monk, T. Klefoth, C. Wolter, R. Arlinghaus
Summary: The quality of the littoral zone is crucial for lentic fish species in gravel pit lakes. By adding brush piles in the littoral zone of eight lakes, the diurnal and seasonal use of microhabitats by dominant fish species was investigated. The study found that complex shoreline structures were used by all fish species during the day, while unstructured habitats were utilized more at night. The newly added brush piles provided suitable habitats for specific fish species, particularly during winter.
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
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)
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)