Article
Agriculture, Dairy & Animal Science
Milan Miljevic, Borislav Cabrilo, Ivana Budinski, Marija Rajicic, Branka Bajic, Olivera Bjelic-Cabrilo, Jelena Blagojevic
Summary: This study analyzed intestinal nematodes in three small rodent species and found that animals in better condition had higher parasite species richness. In A. flavicollis, females had more parasite species than males of the same body condition. Contrary to expectations, spleen mass did not reflect changes in parasitism level, but in M. glareolus, a smaller spleen was related to a higher parasite load.
Article
Multidisciplinary Sciences
Fabiano Paschoal, Anderson D. Cezar, Felipe B. Pereira, Jose L. Luque
Summary: Haemulidae is a diverse and widespread family of Perciformes, mostly found in marine habitats. A study in the State of Rio de Janeiro, Brazil, analyzed the metazoan parasites of three species of Haemulidae. The study found that ectoparasites were most common in A. virginicus and Co. nobilis, while endoparasites were most common in O. rubra. The host species differed in abundance, richness, and diversity of parasites.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2023)
Article
Fisheries
Magnus Lauringson, Ilkka Nousiainen, Siim Kahar, Oksana Burimski, Riho Gross, Tanel Kaart, Anti Vasemagi
Summary: Global climate change is impacting the abundance and spread of parasites, leading to variation in host-parasite interactions and relationships between different host species. The study on myxozoan endoparasite Tetracapsuloides bryosalmonae in wild brown trout and Atlantic salmon reveals that the speed of parasite proliferation, rather than the absolute number of parasites in the host kidney, plays a critical role in interspecific variation in PKD susceptibility. Therefore, temporal perspective is useful for understanding host defense mechanisms and the impacts of climate change on wildlife.
JOURNAL OF FISH DISEASES
(2021)
Article
Environmental Sciences
Serena R. Wright, David Righton, Joachim Naulaerts, Robert J. Schallert, Chris A. Griffiths, Taylor Chapple, Daniel Madigan, Vladimir Laptikhovsky, Victoria Bendall, Rhys Hobbs, Doug Beare, Elizabeth Clingham, Barbara Block, Martin A. Collins
Summary: The study investigated the behavior of yellowfin tuna using satellite tags in the South Atlantic Ocean around St Helena, finding that their behavior varies seasonally and with depth, impacting the catchability of the fish by local fishing fleets.
FRONTIERS IN MARINE SCIENCE
(2021)
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
Biochemistry & Molecular Biology
Marilie Pretorius, Annemarie Avenant-Oldewage
Summary: The study found that water quality influenced by metal pollution negatively impacts the infection of Lamproglena clariae, with areas having higher metal concentrations and organic pollution levels showing lower parasite infection rates.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Oceanography
Serena R. Wright, David Righton, Joachim Naulaerts, Robert J. Schallert, Victoria Bendall, Christopher Griffiths, Michael Castleton, Daniel David-Gutierrez, Daniel Madigan, Annalea Beard, Elizabeth Clingham, Leeann Henry, Vladimir Laptikhovsky, Douglas Beare, Waylon Thomas, Barbara A. Block, Martin A. Collins
Summary: Yellowfin tuna, a widely distributed migratory species, have been tagged in the South Atlantic Ocean to study their movement patterns. Most yellowfin tuna remained within 70 km of their release location, while some displayed large-scale movements, indicating connections between different regions.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2021)
Article
Multidisciplinary Sciences
Isaure de Buron, Kristina M. Hill-Spanik, Tiffany Baker, Gabrielle Fignar, Jason Broach
Summary: Three juvenile Atlantic tripletail fish caught in Charleston Harbor, USA, displayed altered swimming behavior after being infected with strigeid trematode larvae. The larvae were identified as Cardiocephaloides medioconiger through genetic sequencing. This is the first report of Atlantic tripletail acting as a second intermediate host for C. medioconiger in South Carolina. The findings suggest that infection by C. medioconiger could potentially spread to other fish species and impact neighboring ecosystems.
Article
Environmental Sciences
Aurelia Pereira Gabellini, Patrizio Mariani, Asbjorn Christensen
Summary: The study investigates the linkages between population variability of commercial fish species in the Atlantic Ocean and the primary production and transport processes of eggs and larvae. By simulating the dispersion of eggs and larvae and considering the ecological information of major fish stocks, the study finds marked differences in how physical and biological processes interact in the early life stages of different fish groups in the Atlantic Ocean.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Natalia A. Dellabianca, Monica A. Torres, Constanza Ordonez, Nicolas Fioramonti, Andrea Raya Rey
Summary: The marine ecosystem plays a vital role in providing goods and services, as well as regulating carbon fluxes, nutrient cycling, and bioremediation. However, anthropogenic threats have greatly altered the ocean. Seabirds and marine mammals, with their ecological features, can serve as sentinels of the marine ecosystem.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2023)
Article
Environmental Sciences
Takako Masuda, Ondrej Prasil, Virginia E. Villafane, Macarena S. Valinas, Keisuke Inomura, E. Walter Helbling
Summary: This study assessed the impact of global change variables on phytoplankton communities in different sites along the Patagonian coast. The results showed that under future conditions, phytoplankton growth was higher in estuarine areas compared to enclosed bays and open waters, especially among large diatoms. Although an increase in photosynthetic activity was not always observed in the future scenario, the lower photosynthetic electron requirement for carbon fixation suggests a more efficient energy utilization.
FRONTIERS IN MARINE SCIENCE
(2021)
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
Marine & Freshwater Biology
Rafael Schroeder, Paulo R. Schwingel, Alberto T. Correia
Summary: The study evaluated distinct population-units of Brazilian sardine inferred from body geometric morphometrics and otolith shape analyses. It revealed the existence of two different population-units in the Brazilian fishing area, likely due to varying oceanographic conditions and fish growth patterns.
Article
Fisheries
Brenda Temperoni, Santiago Aldo Barbini, Paula Orlando, Claudio Cesar Buratti
Summary: The study revealed a marked ontogenetic shift in the diet of rough scad at around 190 mm in size, with smaller individuals specializing in mysidaceans and larger individuals consuming decapods and teleosts. Medium-sized individuals showed a broader trophic niche, preying mainly on copepods and chaetognaths.
JOURNAL OF FISH BIOLOGY
(2021)
Article
Environmental Sciences
Manuel M. Irigoitia, Eugenia Levy, Delfina Canel, Juan T. Timi
Summary: Chondrichthyan populations are highly susceptible to overfishing due to their low reproductive potential and population growth. The Dipturus brevicaudatus skate in Argentine waters is particularly vulnerable to commercial fishing as it is frequently caught as by-catch. A study on its parasites has discovered three distinct stocks, providing a basis for management and recovery strategies to preserve this vulnerable species.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
