Article
Environmental Sciences
Jose Angel Alvarez Perez, Rodrigo Sant'Ana
Summary: Temperatures in the southwest South Atlantic Ocean have been increasing in recent decades, primarily due to changes in Brazil's Current dynamics. This has had significant impacts on marine ecosystems, but the effects on demersal fauna are not well understood. A study in Santa Catarina, Brazil, analyzed commercial demersal catches between 2000 and 2019 and found evidence of megafauna tropicalization in the region. The mean temperature of catches has been rising since 2013, correlating with changes in bottom water temperatures and transport volumes of the Brazil Current.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Studies
Carlos Chavez, Jorge Dresdner, Nuria Gonzalez, Mauricio Leiva, Miguel Quiroga
Summary: The study applied the Fishery Performance Indicators methodology to analyze the Anchoveta Fishery in southern Peru and northern Chile, finding no significant differences in input performance between the countries but better performance in the harvest stage in Chile. The differences may be attributed to general societal factors and characteristics of fishery organization.
Article
Environmental Sciences
Aline R. Franca, George Olavo, Sergio M. Rezende, Beatrice P. Ferreira
Summary: Sites and periods of spawning aggregations of two important fishery resources, the mutton snapper, Lutjanus analis, and the dog snapper, Lutjanus jocu, were identified and validated along the Brazilian north-east coast. The study showed that spawning activity and seasonal closures may be more effective if combined with spatial management measures, suggesting co-management approaches are needed for these fishing sites.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Article
Engineering, Environmental
John Driscoll, Kai M. A. Chan
Summary: This study highlights the neglect of nutrient information in traditional fisheries science and management, leading to a lack of understanding of nutrient yields and their changes in exploited fish species. By applying nutrient-informed analysis, the researchers find that nutrient yields show more variation over time and are concentrated in fewer taxa in northwest Atlantic fisheries. Minor species in terms of weight are identified as key sources of specific nutrients, with Atlantic herring being a cornerstone of regional nutrient yields.
Article
Oceanography
Ariane R. Ribeiro, Ludmila M. A. Damasio, Renato A. M. Silvano
Summary: Studies have shown a high agreement between local ecological knowledge (LEK) of small-scale fishers and scientific data on fish diet and migration patterns. However, there is less knowledge and lower agreement among fishers when it comes to fish reproduction. Fishers reported declines in abundance and size of studied grouper species, particularly in the threatened fish E. itajara, over time.
OCEAN & COASTAL MANAGEMENT
(2021)
Article
Ecology
Houria Handjar, Yassine Guendouzi, Abdellatif Niar, Hichem Kara, Moustafa Benhalima
Summary: This study provides management-related information on the fisheries biology of Boops boops, including growth, mortality, and fishing effort. The results indicate that the bogue stock is being overexploited, despite having a relatively long lifespan and moderate fishing intensity.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Immunology
Byron Morales-Lange, Felipe Ramirez-Cepeda, Paulina Schmitt, Fanny Guzman, Leidy Lagos, Margareth Overland, Valentina Wong-Benito, Monica Imarai, Derie Fuentes, Sebastian Boltana, Javier Alcaino, Carlos Soto, Luis Mercado
Summary: This study investigated the effect of IFN gamma on the expression of cell-surface markers on splenocytes of Atlantic salmon. The results showed that IFN gamma could stimulate the gene expression and protein availability of cell-surface markers, enhancing the function of immune cells. In vivo experiments demonstrated that during a natural outbreak of Piscirickettsia salmonis, the expression of IFN gamma in Atlantic salmon increased simultaneously with the up-regulation of cell-surface markers.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Fisheries
Helle Torp Christensen, Frank Riget, Anja Retzel, Erik Haar Nielsen, Einar Eg Nielsen, Rasmus Berg Hedeholm
Summary: Mixed-stock fisheries pose challenges for management, and this study demonstrates the practical application of high-resolution genetic stock monitoring in managing mixed Atlantic cod stocks in western Greenland.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Environmental Sciences
Kristen A. Anstead, Katie Drew, David Chagaris, Matt Cieri, Amy M. Schueller, Jason E. McNamee, Andre Buchheister, Genevieve Nesslage, Jim H. Uphoff, Michael J. Wilberg, Alexei Sharov, Micah J. Dean, Jeffrey Brust, Michael Celestino, Shanna Madsen, Sarah Murray, Max Appelman, Joseph C. Ballenger, Joana Brito, Ellen Cosby, Caitlin Craig, Corrin Flora, Kurt Gottschall, Robert J. Latour, Eddie Leonard, Ray Mroch, Josh Newhard, Derek Orner, Chris Swanson, Jeff Tinsman, Edward D. Houde, Thomas J. Miller, Howard Townsend
Summary: Atlantic menhaden is a key fishery resource and forage species on the US East Coast. Concerns over the impact of harvest on ecosystem processes led to a shift from single-species to ecosystem approaches in assessment and management. The adoption of an ecological modeling framework represents a significant advance in forage fish management on the US Atlantic Coast.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Audrey Bourret, Andrew Smith, Elisabeth Van Beveren, Stephane Plourde, Kiersten L. Curti, Teunis Jansen, David E. Richardson, Martin Castonguay, Naiara Rodriguez-Ezpeleta, Genevieve J. Parent
Summary: In the Northwest Atlantic, the Atlantic mackerel has a northern contingent spawning in Canada and a southern contingent spawning in the United States. Genetic differentiation was observed between the two contingents, and genetic assignments showed predictive accuracy > 85%. Both contingents were found along the U.S. shelf during late winter and early spring, and likely in Canadian waters from late spring to fall. Genetic assignments can be used for stock discrimination and effective fisheries management on a contingent level.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Fisheries
Simon Henriksson, Ricardo T. Pereyra, Marte Sodeland, Olga Ortega-Martinez, Halvor Knutsen, Hakan Wennhage, Carl Andre
Summary: A study found two sympatric ecotypes of Atlantic cod in the Skagerrak and Kattegat region, indicating different adaptations to the environment. This highlights the importance of considering locally adapted ecotypes for fisheries management.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Fisheries
Juan F. Espinola-Novelo, Marcelo E. Oliva
Summary: The study evaluated the potential spatial and temporal variability of parasite communities affecting three marine fish species collected between 1993 and 2017. The results showed differences in the prevalence of most taxa at spatial and temporal scales, with some larval endoparasites remaining constant over time. Spatial stability was observed in samples from different localities, while temporal variability was noted in samples from different years. Temporal variability must be taken into account in studies regarding parasites as a tool for stock identification.
Article
Fisheries
K. G. Mini, T. V. Sathianandan, Somy Kuriakose, Sindhu K. Augustine, V. K. Manu, R. Manjeesh, Sijo Paul, J. Jayasankar, Eldho Varghese, A. Gopalakrishnan
Summary: To balance the use and protection of fish as a natural resource, reliable data on recent and historical catches are crucial. The Central Marine Fisheries Research Institute of the Indian Council of Agricultural Research has developed a unique and robust system for monitoring and assessing marine fishery resources. They have also developed a web-based application software for real-time data collection and analysis, which can provide useful information for fish stock assessment.
FISHERIES RESEARCH
(2023)
Article
Marine & Freshwater Biology
Giulia Terlecki, Lucas dos Santos Rodrigues, Eidi Kikuchi, Felippe Veneziani Abbatepaulo, Camila Bosenbecker, Marcio de Araujo Freire, Maria Cristina da Silva Cortinhas, Maira Carneiro Proietti, Luis Gustavo Cardoso
Summary: This study focuses on the Lampris genus fishes from the Southwest Atlantic Ocean and reveals the genetic diversity and morphological differences of Lampris australensis and Lampris megalopsis. Understanding and identifying these species correctly is crucial for conservation and management initiatives.
Article
Biodiversity Conservation
Margrete Emblemsvag, Karl Michael Werner, Ismael Nunez-Riboni, Romain Frelat, Helle Torp Christensen, Heino O. Fock, Raul Primicerio
Summary: This study investigated the spatio-temporal changes in fish community structure at different depths in East Greenland and found the most significant changes occurred between 350 and 1000 meters depth. These changes were in synchrony with atmospheric warming, loss in sea ice, and variability in physical sea surface conditions.
GLOBAL CHANGE BIOLOGY
(2022)