Article
Biochemistry & Molecular Biology
Ying-Ying Li, Jin-Xian Yang, Xi Chen, Qiang Chen, Tie-Ying Song, Jun-Qing Ge
Summary: This study investigated the molecular mechanisms and immune response in the skin mucus of Anguilla anguilla infected with Anguillid herpesvirus 1 (AngHV) at the protein levels. TMT-labelled proteomics with LC-MS/MS was used for quantitative identification of proteins. The results showed significant changes in protein expression, and many differentially expressed proteins were found to be enriched in various pathways, providing important insights into the pathogenesis of AngHV.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Marjorie Lortholarie, Laurence Poirier, Abderrahmane Kamari, Christine Herrenknecht, Aurore Zalouk-Vergnoux
Summary: Rare earth elements (REEs) are essential in many industrial and medical fields due to their unique properties, but they are also becoming emerging pollutants. This study investigated REE bioaccumulation in Anguilla anguilla from the Loire estuary, revealing differences in organotropism between life stages and genders. Significant variations in REEs abundances were observed in different organs, life stages, and genders, with parasitism by Anguillicola crassus also appearing to impact REE bioaccumulation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemistry & Molecular Biology
Shenglin Liu, Aja Noersgaard Buur Tengstedt, Magnus W. Jacobsen, Jose Martin Pujolar, Bjarni Jonsson, Javier Lobon-Cervia, Louis Bernatchez, Michael M. Hansen
Summary: This study analyzed genetic and methylation variation in European eels and found that methylation plays an important role in the life cycle of eels, potentially mediating interactions between local environments, development, and phenotypic variation for adaptation. The study also highlighted the significant role of methylation at Hox genes for adaptive processes.
Article
Agriculture, Dairy & Animal Science
Luis Vinatea, Ricard Carbo, Karl B. Andree, Enric Gisbert, Alicia Estevez
Summary: The study shows that European eel elvers can adapt well to biofloc systems, which have lower production costs compared to conventional systems. The maintenance of biofloc in tanks and prevention of opportunistic pathogens were identified as critical issues. Further studies are needed to test the technology with older eel stages.
Review
Fisheries
Bernd Pelster
Summary: Eels use their swimbladder for buoyancy control, which is achieved through the activity of gas gland cells and countercurrent concentration. Gas gland cells produce lactic acid and CO2, which acidify the blood and release oxygen from hemoglobin. The diffusion of oxygen and CO2 into the swimbladder is facilitated by the diffusion gradients created by elevated PO2 and PCO2. Infection of the swimbladder with the nematode Anguillicola crassus impairs its function as a buoyancy organ.
Article
Fisheries
C. M. F. Durif, M. Arts, F. Bertolini, A. Cresci, F. Daverat, E. Karlsbakk, J. Koprivnikar, E. Moland, E. M. Olsen, C. Parzanini, M. Power, M. Rohtla, A. B. Skiftesvik, E. Thorstad, L. A. Vollestad, H. Browman
Summary: This article discusses the life cycle strategies of anguillid eels and introduces methods for studying these strategies. The article points out that the current management framework for eels focuses mainly on freshwater environments, ignoring eels growing in saline waters. The authors argue that the ability of eels to shift habitats is crucial for the recovery of endangered species.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Kasun A. Bandara, Elisa Benini, Sebastian N. Politis, Luis E. C. Conceicao, Andre Santos, Sune Riis Sorensen, Jonna Tomkiewicz, Olav Vadstein
Summary: The critical period between 20 to 24 days post hatch in European eels is associated with larvae-bacterial interactions and the larval immune status. During this period, the larval stress/repair mechanism is activated, and there is a shift towards a potentially detrimental larval bacterial community. However, larvae fed with a specific diet show higher expression of immune genes and better survival compared to other groups.
Article
Environmental Sciences
Helene Ronquist Knutsen, Sune Riis Sorensen, Peter Munk, Tora Bardal, Elin Kjorsvik
Summary: The study characterized the digestive system of European eel leptocephalus larvae, finding features such as an expandable pharynx/esophagus and a linear relationship between intestine length and larval size. The findings support the hypothesis that the larvae may feed on digestible gelatinous plankton and marine snow aggregates.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Jeremy Denis, Khalef Rabhi, Francois Le Loc'h, Frida Ben Rais Lasram, Kevin Boutin, Maria Kazour, Mamadou Diop, Marie-Christine Gruselle, Rachid Amara
Summary: This study characterizes and compares the feeding ecology of European eels in different salinity gradients in northern France estuaries. The research finds that eels mainly feed on crustaceans and fish, and their trophic level varies among different estuaries. The results are important for understanding the ecology and environmental adaptability of eels.
Article
Environmental Sciences
Concepcion Martinez-Gomez, Beatriz Fernandez, Elena Barcala, Victor Garcia-Aparicio, Esther Jumilla, Angel Gea-Pacheco, Victor Manuel Leon
Summary: This study provides an initial overview of the impact of organic chemical contaminants on the European eel and the potential sublethal effects of chemical pollution on pre-migrating eels in the Mar Menor coastal lagoon. The findings reveal that eels in this habitat are exposed to high levels of legacy organochlorine contaminants, banned pesticides, and emerging chemicals, and they show biomarker responses indicating genotoxic effects.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Marine & Freshwater Biology
Mehis Rohtla, Even Moland, Anne Berit Skiftesvik, Eva B. Thorstad, Sebastian Bosgraaf, Esben M. Olsen, Howard I. Browman, Caroline M. F. Durif
Summary: Like many animals, the northern temperate eel can enter a dormancy-like state during the winter. The timing of dormancy is mainly related to photoperiod and less to temperature. In a fjord in Southern Norway, the European eel exhibited dormancy from late October or November until mid-April, with over 50% of eel becoming dormant when day length was less than 9 hours.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Environmental Sciences
Andrew S. Vowles, Paul S. Kemp
Summary: Artificial light at night (ALAN) is a pervasive form of environmental pollution that can negatively impact the critically endangered European eel. This study found that European eels exposed to high levels of ALAN were more likely to reject illuminated routes, less likely to choose illuminated channels when given a choice, and moved downstream more rapidly when selecting the illuminated route. These findings provide a basis for future research and highlight the ecological impacts of ALAN as a significant environmental pollutant.
ENVIRONMENTAL POLLUTION
(2021)
Article
Fisheries
Carina Caldeira, Sandra Hernandez-Ibanez, Alberto Vendrell, Anthony Valverde, Almudena Garcia-Molina, Victor Gallego, Juan F. Asturiano, Carles Soler
Summary: The current methods for analyzing fish spermatozoa head morphology are subjective, time-consuming, and variable due to manipulation of the samples. This study developed a computer-assisted system to accurately measure the morphology of European eel spermatozoa. By comparing measurements from samples treated with fixation solution and samples without fixation, it was found that the use of TruMorph(R) without fixation produced more realistic measurements.
Review
Fisheries
Mar Collado-Gonzalez, Maria Angeles Esteban
Summary: The study evaluated the immunomodulatory capacity of chitosan nanoparticles used as mucosal vaccines in teleost fish, focusing on the properties of chitosan. Information regarding the properties of chitosan is often underestimated in the literature and should be improved in future studies to generate reproducible data and valuable information.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Article
Ecology
Nicola J. Baker, Rosalind M. Wright, Ian G. Cowx, Leona A. Murphy, Jonathan D. Bolland
Summary: The study found that European eels choose to pass through pumping stations, gravity sluices, or retreat upstream during downstream migration. It is recommended to make operational changes to increase the attractiveness of gravity sluices to reduce passage through hazardous pumping stations.
ECOLOGICAL ENGINEERING
(2021)
Article
Fisheries
Jose Carlos Campos-Sanchez, Enrica Vitarelli, Francisco A. Guardiola, Diana Ceballos-Francisco, Jose Maria Garcia Beltran, Antonio Ieni, Maria Angeles Esteban
Summary: This study evaluated local inflammation mechanisms in the skin of gilthead seabream induced by carrageenin, finding an increase in skin mucus-secreting cells and acidophilic granulocytes after injection. Gene expression of various markers and proinflammatory genes was also up-regulated post-injection. Results indicate the chronological involvement of important immune cells in resolving inflammation in the fish skin.
JOURNAL OF FISH DISEASES
(2022)
Article
Chemistry, Physical
Gurjaspreet Singh, Mohit, Diksha, Suman, Priyanka, K. N. Singh, D. Gonzalez-Silvera, Cristobal Espinosa-Ruiz, Maria Angeles Esteban
Summary: This study proposed the synthesis of chalcone derived organosilanes based on polycyclic aromatic compounds, and categorized the synthesized compounds using various spectroscopic techniques. The compound showed high affinity towards various metal ions, particularly Sn2+, and demonstrated improved detection capabilities for Sn(II) ions when bound to Fe-based magnetic silica nanoparticles.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Biochemistry & Molecular Biology
Adriana Trapani, Maria Angeles Esteban, Francesca Curci, Daniela Erminia Manno, Antonio Serra, Giuseppe Fracchiolla, Cristobal Espinosa-Ruiz, Stefano Castellani, Massimo Conese
Summary: This study investigates the use of solid lipid nanoparticles (SLN) to deliver a mixture of antioxidant compounds to fish cells in aquaculture. The findings show that an SLN formulation containing Gelucire(R) 50/13 and Precirol(R) ATO5 can improve the viability and antioxidant properties of fish cells. This research may have significant implications in the field of aquaculture.
Article
Fisheries
M. G. Parisi, N. Baranzini, M. Dara, C. La Corte, J. Vizioli, M. Cammarata
Summary: This study evaluated the immunological parameters of Mediterranean mussels in response to Vibrio splendidus infection. The results showed that TLR4 was activated before bacterial infection and recruited the MyD88 adapter. Challenging with Gram-negative bacteria caused a massive migration of AIF-1(+) hemocytes, and the ribonuclease RNASET2 may play a key role in this recruitment. This research contributes to a better understanding of the complex molecular defense mechanisms in bivalve molluscs and can guide the development of immunological response assessment methods in aquaculture.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Article
Fisheries
Xiaoming Yu, Vera F. M. F. Sousa, Beatriz M. Oliveira, Francisco A. Guardiola, Francisca Silva-Brito, Rodrigo O. A. Ozorio, Luisa M. P. Valente, Leonardo J. Magnoni
Summary: This study investigated the effects of induced sustained swimming on various factors in juvenile gilthead seabream, including growth performance, metabolic parameters, external morphology, skeletal muscle fiber characteristics, and immune and metabolic markers. The results showed that induced swimming changed the body shape of seabream, increased the oxygen-carrying capacity and plasma lactate levels, but had no significant effect on growth performance and metabolic rates.
Article
Fisheries
Rui Magalhaes, Francisco Abellan Guardiola, Ines Guerreiro, Filipa Fontinha, Sara Moutinho, Claudia Reis Serra, Rolf Erik Olsen, Helena Peres, Aires Oliva-Teles
Summary: This study evaluated the immunomodulatory effects of different ratios of ARA, EPA, and DHA in the diet of gilthead sea bream juveniles. The results showed that fish fed with high DHA diet exhibited increased immune activity after intraperitoneal injection, while fish fed with high ARA diet showed higher bactericidal activity against the pathogenic bacteria.
AQUACULTURE RESEARCH
(2022)
Article
Environmental Sciences
Chalbia Mansour, Maria Angeles Esteban, Omar Rouane Hacene, Dalila Saidane Mosbahi, Francisco Antonio Guardiola
Summary: This study evaluated immune-related parameters in carpet shell clams from the South Lagoon of Tunis, and found that seasonal and pollution factors influenced the values of these parameters. Principal component analyses showed that the chemical industrial area was the most impacted location. The results suggest that immune-related parameters measured in carpet shell clam cell-free haemolymph could serve as suitable biomarkers for environmental quality assessments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Claudia La Corte, Mariano Dara, Federica Bertini, Daniela Parrinello, Daniela Piazzese, Maria Giovanna Parisi
Summary: This study aimed to investigate the immune responses of the polychaete Sabella spallanzanii after exposure to copper sulphate and Escherichia coli infection, in order to validate its use as a model organism in marine-coastal biomonitoring programmes. The results demonstrate the immunomodulating effect of copper sulphate on S. spallanzanii, which is associated with oxidative stress and inflammatory markers.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
(2023)
Article
Fisheries
Jose Carlos Campos-Sanchez, Daniel Gonzalez-Silvera, Xu Gong, Richard Broughton, Francisco A. Guardiola, Monica B. Betancor, Maria Angeles Esteban
Summary: The role of adipocytes and fatty acids in carrageenan-induced skin inflammation was studied in gilthead seabream. Results showed that injection of lambda-carrageenin led to an increase in adipocyte area at 3 hours post-injection and an increase in adipocyte frequency at 6 hours post-injection. Analysis of lipid classes revealed increased levels of free fatty acids and sphingomyelin in the injected fish compared to the control group. The fatty acid profile of the fish skin also showed changes, with an increase in saturated fatty acids and n-6 polyunsaturated fatty acids, and a decrease in monounsaturated fatty acids, n-3 polyunsaturated fatty acids, and minor fatty acids at 6 hours after injection. Evaluation of eicosanoids indicated an increase in hydroxyeicosatetraenoic acid in the injected fish compared to the control group. These findings demonstrate the contribution of adipocytes and fatty acids to the inflammatory response in gilthead seabream skin.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Review
Fisheries
Abir Bahi, Abel Ramos-Vega, Carlos Angulo, Elizabeth Monreal-Escalante, Francisco A. Guardiola
Summary: In recent years, microalgal biotechnology has been recognized as a valuable source of functional feed additives for fish species. Numerous microalgae have demonstrated immunostimulant properties and enhanced disease resistance in fish. This literature review aims to gather and present research on the immune modulation effects of microalgae and their compounds in farmed fish, highlighting their potential for aquaculture. Although the exact mechanisms remain unclear, the inclusion of different microalgal species in fish feed has proven to improve the immune response and increase survival under stress and infectious conditions.
REVIEWS IN AQUACULTURE
(2023)
Article
Biochemistry & Molecular Biology
Claudia La Corte, Nicolo Baranzini, Mariano Dara, Camilla Bon, Annalisa Grimaldi, Maria Giovanna Parisi, Maria Grazia Zizzo, Matteo Cammarata
Summary: This study investigates the differences and characteristics in injured and healthy tissues of the soft coral Anemonia viridis through histological investigation. In addition, positron emission tomography is used for the first time in invertebrates to study regeneration over a longer time period. The results indicate that Mediterranean anthozoan is a valuable model for studying regeneration and many events observed are highly conserved across different phyla.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Fisheries
Raquel Vizcaino, Francisco A. Guardiola, M. Prado-Alvarez, Marina Machado, Benjamin Costas, Camino Gestal
Summary: The aim of this study was to gather deeper insights on functional and molecular stress biomarkers in the common octopus. The results showed significant variations in most of the innate immune parameters in the skin mucus of the octopus after 17 days of movement limitations. At the transcriptional level, some genes showed increased or decreased expression levels under stressful conditions. Overall, this study identified potential functional and molecular biomarkers for studying stressful conditions in the common octopus.
AQUACULTURE REPORTS
(2023)
Article
Fisheries
Jose Carlos Campos-Sanchez, Francisco A. Guardiola, Maria Angeles Esteban
Summary: This study evaluated the potential therapeutic applications of cantharidin in fish, and found that it exhibited dose- and time-dependent cytotoxicity in fish erythrocytes and cell lines, as well as potent bactericidal activity against certain fish pathogenic bacteria. These results provide valuable information on the potential therapeutic applications of cantharidin in fish aquaculture.
Article
Fisheries
Mariano Dara, Maria Dioguardi, Mirella Vazzana, Irene Vazzana, Pierluigi Carbonara, Sebastien Alfonso, Matteo Cammarata
Summary: This study investigated the role of spatial exploration and territoriality in gilthead seabream, and found that time is important in forming social organization while territoriality is related to immune response.
Article
Fisheries
Mariano Dara, Maria Dioguardi, Mirella Vazzana, Irene Vazzana, Davide Accardi, Pierluigi Carbonara, Sebastien Alfonso, Matteo Cammarata
Summary: This paper investigates the effects of social stress on gilt-head bream and finds that social stress can affect the physiological state and immune response of fish. The study provides insights into the relationship between behavior and physiology in fish.