Article
Fisheries
R. Marques, S. A. Otto, J. Di Pane, M. Boersma, C. L. Meunier, K. H. Wiltshire, C. Moellmann, J. Renz
Summary: The North Sea is undergoing rapid changes, with fishing intensity, eutrophic conditions, and climate change acting synergistically to modify marine communities. This study focused on large-sized zooplankton and found that the entire community underwent significant restructuring in 2006, shifting from hydrozoans and holoplankton taxa to an increasing abundance of decapods over the long term. The study also identified temperature and top-down processes as the key factors driving community dynamics.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Review
Veterinary Sciences
Robert W. Elwood
Summary: Studies suggest that pain responses in fish and decapod crustaceans go beyond mere nociceptive reflex, involving central processing and the possibility of pain experience, although not proven. The research recommends further consideration and welfare measures for both groups.
FRONTIERS IN VETERINARY SCIENCE
(2021)
Article
Fisheries
Milena Souza dos Santos Sanchez, Mariana Lins-Rodrigues, Jhonis Ernzen Pessini, Fabio Bittencourt, Wilson Rogerio Boscolo, Altevir Signor
Summary: This study evaluated the effects of dietary supplementation with L-carnitine on growth performance, gut and muscle histological parameters, blood hematology, plasma biochemical parameters, and antioxidant enzymes in Nile tilapia juveniles. Results showed that supplementation with L-carnitine improved growth performance and reduced lipid content in the filet, while also increasing the activity of the enzyme catalase in the liver. Different inclusion levels of L-carnitine had varying effects on weight gain, fat deposition, and triacylglycerol in the fish.
Article
Environmental Sciences
Evgeniia Karpova, Ernes Abliazov, Svetlana Statkevich, Cu Nguyen Dinh
Summary: For the first time, a quantitative assessment was made on the accumulation and dynamics of pollutants in the bottom sediments of the Mekong basin. The study found that the distribution of macroplastic in the rivers varied spatially and temporally, with higher amounts in branches with low monthly flow, shallow-water areas, and during the low-water period. There was a significant relationship between the abundance of fish and decapods and the mass of macroplastics, suggesting that aquatic organisms are attracted to substrates with plastic fragments.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
S. M. Mendoza, V. H. Fernandez, M. Barrios, R. Mena, S. Miriuka, M. Cledon
Summary: Microplastics were found in the stomach contents of all sampled individuals of juvenile silversides, with fibers being the most common type. The size of the individuals was correlated with the maximum particle size ingested, while the number of particles ingested per individual did not differ significantly. These findings suggest that protected areas of large ocean currents increase the risk of local fauna ingesting microplastics.
MARINE POLLUTION BULLETIN
(2022)
Review
Environmental Sciences
Sahar Chauffour Mejri, Rejean Tremblay, Celine Audet, Paul S. Wills, Marty Riche
Summary: This review focuses on the difference in essential fatty acid requirements between cold-water and warm-water marine fish species, with cold-water species showing higher demand. Small Florida pompano have satisfactory omega-3 and omega-6 levels in their diet, but potential deficiencies in other essential fatty acids.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Gisele Cristina Favero, Fabio Aremil Costa dos Santos, Gustavo Soares da Costa Julio, Pedro Paulo Cortezzi Pedras, Andre Lima Ferreira, Walisson Silva, Nathalia Soares Ferreira, Luanna do Carmo Neves, Ronald Kennedy Luz
Summary: This study evaluated the effects of short feed restriction cycles on Piaractus brachypomus juveniles during the initial growth phase. The results showed that the 6 days fed/1 day feed restriction treatment had better growth performance compared to the control, while the 5 days fed/2 days feed restriction treatment performed worse. The food intake for the feed restriction treatments was lower.
Article
Fisheries
Tais Ines Zuffo, Emerson Giuliani Durigon, Monique Berticelli Morselli, Fernanda Picoli, Sidinei Folmann, Jose Fernando Kinas, Thaiza Savaris, Aline Zampar, Diogo Luiz De Alcantara Lopes
Summary: The study determined the ideal temperature range and ammonia concentration for breeding Curimbata through experiments, as well as their effects on fish.
Article
Fisheries
Thiago Macedo Santana, Francisco de Matos Dantas, Driely Kathriny Monteiro Dos Santos, Juliana Tomomi Kojima, Yugo Moraes Pastrana, Rogerio Souza De Jesus, Ligia Uribe Goncalves
Summary: Fish viscera can be processed into acid and fermented silage as an important protein and energy source for aquafeed. This study evaluated the nutritional value and digestibility of these silages for juvenile tambaqui. The silages had high dry matter, lipid, and protein content, with leucine and lysine as the predominant essential amino acids. The silages also contained EPA and DHA, and showed good apparent digestibility for both protein and energy. Overall, fish viscera silage can be a valuable energy ingredient for aquafeed.
Article
Veterinary Sciences
Oluwaseun Christianah Ojelade, Samuel Olutunde Durosaro, Abiodun O. Akinde, Ikililu Abdulraheem, Mathew B. Oladepo, Comfort A. Sopein, Abiodun S. Bhadmus, Mary Olateju
Summary: Environmental enrichment has positive effects on the survival rate and growth of Clarias gariepinus, particularly in tanks enriched with substratum. There are no significant differences in the behavioral and physiological responses of C. gariepinus raised in different enriched environments.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Article
Ecology
Jeffrey R. Ziegeweid, Gregory D. Johnson, Aliesha L. Krall, Kara Fitzpatrick, Sara B. Levin
Summary: This study developed linear regression models to quantify the relationships between hydrologic metrics and biological responses in Minnesota streams. The results showed significant relationships between hydrologic metrics and fish-based biological response metrics, with tolerance-based biological metrics demonstrating the strongest relationships.
ECOLOGICAL PROCESSES
(2022)
Article
Environmental Sciences
Abraao Tiago Batista Guimaraes, Fernanda Neves Estrela, Paulo Sergio Pereira, Julya Emmanuela de Andrade Vieira, Aline Sueli de Lima Rodrigues, Fabiano Guimaraes Silva, Guilherme Malafaia
Summary: The study found that polystyrene nanoplastics can cause DNA damage, mutagenic and cytotoxic effects in juvenile grass carp. Animals exposed to higher concentrations of the pollutant showed significant biochemical changes and substantial accumulation of these nanomaterials.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Fisheries
Catarina Basto-Silva, Paula Enes, Aires Oliva-Teles, Encarnacion Capilla, Ines Guerreiro
Summary: This study evaluated the effects of dietary protein/carbohydrate ratio and feeding frequency on the growth, metabolism, and economic efficiency of gilthead seabream juveniles. The results showed that feeding a diet with a protein/carbohydrate ratio of 40%/20% twice a day was the most suitable strategy, as it improved fish growth and economic efficiency.
Article
Fisheries
Gabriel Cardoso Neves, Liliane Soares Presa, Lucas Campos Maltez, Jose Maria Monserrat, Luciano Garcia
Summary: This study found that under low hardness conditions, NO2 exposure increased lipid peroxidation levels in muscles and gills, affecting food conversion rate; while under higher hardness conditions, lipid peroxidation levels remained stable, with no significant changes in zootechnical parameters. The addition of CaCO3 to increase calcium levels can reduce the NO2 toxicity levels in pacu juveniles, showing potential for application in water quality management.
Article
Parasitology
Sunique Poa Cordeiro Bentes, Matheus Gomes da Cruz, Gabriela Tomas Jeronimo, Flavia Cuadal Coimbra, Ligia Uribe Goncalves
Summary: This study investigated the acute toxicity of chloramine-T and its effects on the control of trichodinids in arapaima juveniles. The results showed that a therapeutic bath with 20 mg L-1 of chloramine-T for 1 h reduced parasitism by trichodinids without affecting the overall health of arapaima juveniles.
VETERINARY PARASITOLOGY
(2022)