Article
Meteorology & Atmospheric Sciences
Zi-Qing Wang, Guang-Hua Chen, Yu-Hui Zhao
Summary: Based on self-organizing maps (SOM), clustering analysis was performed on 461 tropical cyclones (TCs) in the western North Pacific from 2000 to 2019. The TCs were classified into five patterns, including convergence, monsoon trough, pre-existing cyclone, subtropical high, and easterly wave patterns. The study found that the characteristics and environmental conditions of TC formation vary among different patterns.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Environmental Studies
Karly Marie Miller
Summary: Tourism development has complex impacts on fisheries, leading to a decline in fishery participation but also an increase in fishing effort and improvements in fishing methods, resulting in increased fishing pressure. The impacts vary depending on contextual factors in the biophysical environment and socio-political systems, highlighting the importance of anticipating and planning for sustainable tourism development and fisheries management.
Article
Fisheries
Latifa Pelage, Arnaud Bertrand, Beatrice Padovani Ferreira, Flavia Lucena-Fredou, Anne K. S. Justino, Thierry Fredou
Summary: The study found that all ontogenetic classes of the twelve selected species caught by northeast Brazil SSFs along an estuary-shelf break gradient were in line with a balanced harvest (BH) pattern. Most gears predominately caught young individuals and low trophic level species, suggesting that size limitations alone may not be sufficient to prevent overfishing.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Environmental Studies
Mariana Herrera, Ana Tubio, Pablo Pita, Elsa Vazquez, Celia Olabarria, Andres Simon, Jose Carlos Marino Balsa, Liliana Solis, Ignacio Gianelli, Sebastian Villasante
Summary: Seagrass meadows provide important ecosystem services in coastal environments worldwide, but their effects on shellfishing have not been explored. This study in north-west Spain analyzed the interactions between shellfishing and Zostera spp. beds and identified governance gaps in seagrass management. Interviews and workshops with shellfishers revealed that they viewed the presence of seagrass negatively, as it requires more physical effort and can damage the plants. However, experienced shellfishers recognized the benefits of seagrass meadows and were open to allocating areas for conservation.
Article
Fisheries
Gustavo Hallwass, Friedrich W. Keppeler, Luis H. Tomazoni-Silva, Ivan A. Alves, Victoria J. Isaac, Morgana C. Almeida, Renato A. M. Silvano
Summary: This study evaluated the context and potential advantages of using gillnets alone or in combination with other gears in multi-species freshwater small-scale fisheries in the Brazilian Amazon. The results showed that gillnets allowed for a higher diversity of fish species and reduced variance in fish catches, but mixed gears provided similar or better outcomes. These findings can inform policies aimed at managing the use of gillnets in the Brazilian Amazon and other similar fisheries.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2023)
Article
Oceanography
Stuart J. Campbell, Raymond Jakub, Abel Valdivia, Haris Setiawan, Agus Setiawan, Courtney Cox, Askabul Kiyo, Darman, Lely Fajriah Djafar, Emilio de la Rosa, Wahid Suherfian, Ade Yuliani, Hari Kushardanto, Umi Muawanah, Arwandrija Rukma, Taufiq Alimi, Stephen Box
Summary: The volume and value of fish catches by Indonesia's small-scale fisheries declined significantly after the COVID-19 pandemic, with more than 90% of active fishers and traders reducing their activities. Despite a decrease in the average price per kilogram of fish, fishers who continued fishing had higher catches and maintained their daily catch value. High value fisheries for export were more negatively impacted compared to lower value species sold in local markets.
OCEAN & COASTAL MANAGEMENT
(2021)
Article
Fisheries
Alex Souza Lira, Francois Le Loc'h, Humber Agrelli Andrade, Flavia Lucena-Fredou
Summary: The study found that non-target species are more vulnerable than target species. For the small-scale shrimp fishery in northeast Brazil, certain species with long lifespans, low spawning, high capture rates of juveniles, and high overlap of feeding and breeding grounds with fishing areas are more susceptible to risks. Most species (76%) maintained the same risk category regardless of the evaluation method used. Overall, the target species are not the main ones threatened, but elasmobranchs, catfishes, and Scianidae should be prioritized for assessment and data collection as bycatch.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Environmental Sciences
Michelle J. Gore, Colin M. Zarzycki, Melissa M. Gervais
Summary: The dominant patterns of geopotential height variability were identified through SOM analysis of five reanalysis products during the last four decades. ETC events were tracked using TempestExtremes and integrated with SOMs to classify the accumulated cyclone activity (ACA) associated with each pattern. The skill of CMIP6 historical experiments in simulating the LSMPs and ETC events identified in the SOM was evaluated. Results show a bias toward more zonal patterns in the models, struggling to reproduce the more amplified patterns associated with high cyclone activity. Most CMIP6 models produce too few ETCs, although model errors are distributed around historical reanalyses when ACA is normalized by storm frequency.
Editorial Material
Multidisciplinary Sciences
Sheryl L. Hendriks
Summary: Artisanal fishing is crucial in improving livelihoods, enhancing nutrition, and strengthening food systems, but the involvement of fishers is needed at local, national, and global levels.
Article
Environmental Studies
Julia Benevenuti Soares, Marcus Rodrigues da Costa, Cassiano Monteiro-Neto, Luciana Loto, Mauricio Duppre de Abreu, Rafael de Almeida Tubino
Summary: The COVID-19 pandemic has impacted the value chain structure and dynamics of a small-scale fishery system in the southwestern Atlantic, with fishermen continuing to fish, direct sales, and seafood delivery helping to maintain commercial flows and cope with limitations imposed by the pandemic, leading to an increase in prices.
Article
Computer Science, Artificial Intelligence
Slavisa Jovanovic, Hiroomi Hikawa
Summary: Self-organizing feature maps (SOMs) are commonly used in clustering and data dimensionality reduction. However, their high computational cost limits their real-time online processing. This article surveys the hardware implementations of SOMs and discusses the challenges and trends for their adoption as hardware accelerators in various applications.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Ecology
Pauline Stephan, Daniel Gaertner, Ilan Perez, Lorelei Guery
Summary: This article introduces a method that combines self-organizing maps (SOMs) with a clustering approach to analyze fisheries data. By converting the data into simple geographic maps showing catch hotspots, the method can indicate sensitive areas in fishery management. Testing on simulated and real datasets demonstrates that this method provides scientific support and aids in decision-making for fisheries management.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Computer Science, Software Engineering
Zhaojie Chen, Qi Li, Huajun Feng, Zhihai Xu, Yueting Chen, Tingting Jiang
Summary: This paper proposes a simple yet effective self-supervised learning method to improve networks' performance on small-scale real-world datasets. By generating numerous denser hazy images from a real-world hazy image, networks learn key capabilities of enhancing contrast, leading to stable performance surpassing that of directly supervised learning.
Article
Geography, Physical
Kristen L. Underwood, Donna M. Rizzo, Mandar M. Dewoolkar, Michael Kline
Summary: Given limited resources for managing erosion hazards and water quality along rivers, stakeholders in water resource management could benefit from tools to identify river reaches prone to sediment loading. The Self-Organizing Map (SOM) is a useful tool for clustering multivariate observations and analyzing complex, nonlinear river systems. Through multiple stages of SOM application, we identified seven sediment regimes in river reaches based on stream geomorphic assessment data.
Article
Computer Science, Artificial Intelligence
Leonardo A. Dias, Augusto M. P. Damasceno, Elena Gaura, Marcelo A. C. Fernandes
Summary: The study introduces a fully parallel architecture for SOM that significantly improves processing speed and resource efficiency.
Article
Environmental Sciences
I. J. M. Cornelissen, J. Vijverberg, A. M. van den Beld, N. R. Helmsing, J. A. J. Verreth, L. A. J. Nagelkerke
JOURNAL OF GREAT LAKES RESEARCH
(2018)
Article
Ecology
Erik Maitz Boman, Tadzio Bervoets, Martin de Graaf, Jana Dewenter, Anna Maitz, Melanie P. Meijer Zu Schlochtern, Johan Stapel, Aad C. Smaal, Leopold A. J. Nagelkerke
MARINE ECOLOGY PROGRESS SERIES
(2019)
Article
Biodiversity Conservation
A. M. Luger, J. South, M. E. Alexander, B. R. Ellender, O. L. F. Weyl, L. A. J. Nagelkerke
BIOLOGICAL INVASIONS
(2020)
Article
Fisheries
Niels W. P. Breve, Hendrik V. Winter, Paul A. D. M. Wijmans, Eleanor S. I. Greenway, Leopold A. J. Nagelkerke
JOURNAL OF FISH BIOLOGY
(2020)
Article
Environmental Sciences
T. Stoffers, F. P. L. Collas, A. D. Buijse, G. W. Geerling, L. H. Jans, N. van Kessel, J. A. J. Verreth, L. A. J. Nagelkerke
Summary: The study evaluated the nursery function of restored floodplain channels for rheophilic fish in the lower river Rhine by analyzing 30 years of monitoring data from 12 restoration projects. It found that the nursery area suitability was higher in two-sided connected channels, with rheophilic fish abundance reaching optimal conditions at 13 to 14 years post-restoration. However, rheophilic species richness showed a decreasing trend with channel age, indicating aging channels became less suitable as nursery areas for most rheophilic fish species.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Twan Stoffers, Martin de Graaf, Hendrik Winter, Leopold A. J. Nagelkerke
Summary: This study assessed the distribution and habitat use of reef-associated sharks in the northern Caribbean Netherlands, focusing on ontogenetic shifts in habitat and depth use for the Caribbean reef shark and nurse shark. Results showed that habitat type was the most important factor influencing shark occurrences, with higher probabilities observed in no-fishing zones. The majority of observed sharks were juveniles, suggesting the study area may act as a nursery area. The findings indicate the importance of protecting a diverse range of habitats and depths to support the full life cycle of reef-associated sharks.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Environmental Sciences
Jonathan de Jesus Sauz-Sanchez, Rocio Rodiles-Hernandez, Mercedes Andrade-Velazquez, Manuel Mendoza-Carranza
Summary: Climate change is causing shifts in the distribution patterns of tropical freshwater fish, and ecological niche models can reliably predict these effects. Research indicates potential expansion of distribution ranges of species, such as the tropical gar and giant cichlid, in warmer conditions. This expansion covers areas of high suitability, including important biosphere reserves and protected areas in Central America.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Article
Biodiversity Conservation
Erik M. Boman, Martin De Graaf, Andrew S. Kough, Ayumi Izioka-Kuramae, Alain F. Zuur, Aad Smaal, Leo Nagelkerke
Summary: The study reveals patchy distribution patterns of adult Queen conch, likely due to spatial dependency. Environmental variables have important nonlinear effects on conch abundance, which differ among study areas. Deep areas are crucial for the reproductive capacity of conch.
DIVERSITY AND DISTRIBUTIONS
(2021)
Article
Fisheries
Twan Stoffers, Antonie D. Buijse, Johan A. J. Verreth, Leopold A. J. Nagelkerke
Summary: The large-scale degradation of riparian ecotones and connectivity between rivers and floodplains in European temperate lowland rivers has led to a decline in rheophilic fish populations. Recent river restoration projects have had varying degrees of success in restoring these populations. Understanding nursery habitat requirements is crucial for effective restoration, but the role of habitat heterogeneity in young-of-the-year fish population development is still limited.
FISH AND FISHERIES
(2022)
Article
Biodiversity Conservation
Niels W. P. Breve, Leopold A. J. Nagelkerke, Anthonie D. Buijse, Theodorus J. van Tuijn, AlberTinka J. Murk, Hendrik Winter, H. J. Rob Lenders
Summary: This study reconstructs the historical distribution of sturgeons in northwest Europe and highlights the impact of river fisheries, river regulation, and increased North Sea fishery on the collapse of sturgeon populations.
BIODIVERSITY AND CONSERVATION
(2022)
Article
Ecology
Marita Quitzau, Romain Frelat, Vincent Bonhomme, Christian Mollmann, Leopold Nagelkerke, Sonia Bejarano
Summary: This study highlights the importance of quantifying morphology in ecology and compares the application of different methods in studying morphological variability in fish. The main dimension of variability in morphology was found to be elongation. The choice of dataset in calculating community-scale morphological diversity may affect the accuracy of results, but conclusions regarding the effect of wave exposure on morphological diversity were consistent.
ECOLOGY AND EVOLUTION
(2022)
Review
Fisheries
Amelia Paredes-Trujillo, Manuel Mendoza-Carranza
Summary: This article presents a systematic review and meta-analysis of the risk factors triggering pathogen outbreaks in tilapia culture, focusing on on-farm management and water quality. The results show a correlation between high temperatures, low dissolved oxygen, and high NH3 concentration with pathogen outbreaks. However, most of the current research is descriptive and empirical, and future studies should focus on the effects of multiple stressors on tilapia pathogen outbreaks.
JOURNAL OF FISH DISEASES
(2022)
Article
Biodiversity Conservation
Rosa Maria De Jesus-Carrillo, Frank A. Ocana, Ivan Hernandez-Avila, Manuel Mendoza-Carranza, Alberto J. Sanchez, Everardo Barba-Macias
JOURNAL OF NATURAL HISTORY
(2020)
Article
Fisheries
Juan Carlos Perez-Jimenez, Armando Wakida-Kusunoki, Chrystian Hernandez-Lazo, Manuel Mendoza-Carranza
MARINE AND FRESHWATER RESEARCH
(2020)