Article
Fisheries
Gasper Renko, Ida Djurdjevic, Simona Susnik Bajec
Summary: A novel protocol for the isolation of chromatophores from brown trout skin was developed based on previous research on zebrafish, enabling specific gene expression evaluation. The method is simple, fast, and ethical, allowing for monitoring at multiple time points, and should be effective for the majority of salmonid species due to similarities in skin morphology.
Article
Microbiology
Katharina Keiz, Sebastian Ulrich, Jasmin Wenderlein, Patrick Keferloher, Anna Wiesinger, Klaus Neuhaus, Ilias Lagkouvardos, Helmut Wedekind, Reinhard K. Straubinger
Summary: The bacterial community of brown trout from unfertilized egg to 95 days post fertilization (dpf) was studied using 16S rRNA gene amplicon sequencing. Significant changes in bacterial richness, microbial diversity, and taxonomic composition were observed during early developmental stages until 67 dpf, while the bacterial community seemed to stabilize in the fry stages from 67 to 95 dpf.
Article
Fisheries
Giusy Rusco, Michele Di Iorio, Stefano Esposito, Pierpaolo Gibertoni, Emanuele Antenucci, Valentino Palombo, Alessandra Roncarati, Nicolaia Iaffaldano
Summary: In external fertilizer fish, ovarian fluid (OF) plays a key role in improving sperm swimming performance and reducing the risk of genetic introgression of wild populations from introduced individuals.
Article
Fisheries
Magnus Loven Wallerius, Vilhem Moran, Libor Zavorka, Johan Hojesjo
Summary: Interference competition can have significant effects on population structure and habitat use among different species. The introduction of invasive species often leads to competitive interactions over resources, resulting in exclusion of native species from preferred habitats. This study investigates the competition between invasive brook trout and native brown trout, finding that brook trout have a competitive advantage and can displace smaller brown trout to suboptimal habitats.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Fisheries
Eric R. Fetherman, Brian W. Avila
Summary: Habitat restoration activities in large rivers focus on improving juvenile or adult habitats, but incorporating fry habitat associations into designs can increase overall success. Rainbow trout and brown trout fry were found in habitats with specific substrate sizes, velocities, and depths, with some overlap in associations between the two species. Adjusting restoration activities based on different habitat associations may allow for more effective single-species management and decrease fry infection severity.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Biology
Louise C. Archer, Stephen A. Hutton, Luke Harman, W. Russell Poole, Patrick Gargan, Philip McGinnity, Thomas E. Reed
Summary: This study reveals complex associations between metabolic rate and growth rate in brown trout under different thermal environments, indicating a thermally sensitive metabolic phenotype with adaptive responses. The findings suggest that fluctuating selection related to growth plays an important role in shaping metabolic variation and adapting to climate change.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Ecology
Richard D. Durtsche, Bror Jonsson, Larry A. Greenberg
Summary: Elevated egg incubation temperature leads to lower metabolic rates in juvenile brown trout, potentially impacting their energy expenditure and predatory abilities in a future warmer climate. The results support the countergradient variation hypothesis, showing that thermal conditions can produce phenotypic patterns in metabolic rates. The differences observed were likely due to plastic responses rather than genetic differences among populations.
Article
Fisheries
Kristi Kaello, Henrik Baktoft, Martin Lykke Kristensen, Kim Birnie-Gauvin, Kim Aarestrup
Summary: Natal homing is a common strategy among salmonids, but not all individuals return to their natal river and may stray. This study investigated straying in an anadromous brown trout population and found that 36% of individuals were detected in non-natal rivers. Individuals spending longer time at sea were less likely to stray. The likelihood of straying also depended on the developmental status during out-migration, with lower likelihood for parr compared to pre-smolt and smolt.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Food Science & Technology
Muhammed Atamanalp, Arzu Ucar, Esat Mahmut Kocaman, Gonca Alak
Summary: The research aimed to determine the shelf life of products obtained by using humic acid in trout culture, finding that while humic acid did not affect the chemical composition, color, and texture, it had a significant impact on mineral substance, pH, TBARS, TVB-N, and microbiological results. During storage, there were fluctuations in all analyzed values, but the group with 2% humic acid showed relatively lower values in microbiological and physico-chemical analysis results at the end of the storage period.
FOOD PACKAGING AND SHELF LIFE
(2021)
Article
Environmental Sciences
Dhamotharan Kannimuthu, HyeongJin Roh, H. Craig Morton, Ma Michelle D. Penaranda, Anne Vossgard, Tom Hansen, Per Gunnar Fjelldal, Egil Karlsbakk, Ingrid Fiksdal, Maria K. Dahle, Hakon Berg-Rolness, Stig Maehle, Ghebretnsae Dawit Berhe, Joachim Nordbo, Sonal Patel, Abdullah Madhun, Soren Grove, Bjorn Olav Kvamme
Summary: PRV-1 can infect all developmental stages of Atlantic salmon and brown trout, but brown trout have a lower infection prevalence. All life stages of Atlantic salmon develop heart lesions characteristic of HSMI, while brown trout only exhibit mild infections without pathological changes in target organs. These results strongly suggest that brown trout are less susceptible to PRV-1 infection compared to Atlantic salmon, confirming the species-specific susceptibility and disease development for PRV-1 infection.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Fisheries
Robert Kasprzak, Zdzislaw Zakes, Maciej Kamaszewski, Hubert Szudrowicz, Wiktoria Wiechetek, Julia Renata Janusz, Teresa Ostaszewska, Agata Korzelecka-Orkisz, Krzysztof Formicki
Summary: The conservation of brown trout populations is becoming increasingly important due to environmental degradation. This study assessed the effects of dietary immunostimulants on two morphs of brown trout and found that feeding with a diet enriched with immunostimulants for 2 weeks may enhance rearing protocols for the fish.
FISH & SHELLFISH IMMUNOLOGY
(2023)
Article
Biology
Ouellet Valerie, Melinda D. Daniels
Summary: The study examined the shift in thermal habitat occupation for Brook and Brown Trout populations during the summer, with an increase in Brown Trout and a decrease in Brook Trout numbers. The observed population shifts were driven by optimal growth temperatures rather than elevated water temperatures, potentially affecting interactions and survival throughout the summer.
JOURNAL OF THERMAL BIOLOGY
(2021)
Article
Fisheries
Robert Wynne, Joshka Kaufmann, Jamie Coughlan, Karl. P. Philips, Catherine Waters, Ross W. W. Finlay, Ger Rogan, Russell Poole, Philip McGinnity, Thomas E. E. Reed
Summary: Genetic identity analysis and PIT tagging were used to study the characteristics of downstream migrating juvenile Salmo trutta in the Burrishoole catchment. The study found that the juveniles out-migrated throughout the year, with peaks in spring and autumn. The return rates were similar for both types of outmigrants, but autumn fish stayed away for a longer time and were smaller in size. The findings highlight the importance of considering autumn outmigrants and their transitional habitats in salmonid management and conservation.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Fisheries
Arne J. Jensen, Ola H. Diserud, Bengt Finstad, Peder Fiske, Eva B. Thorstad
Summary: The timing of seaward migration is crucial for the growth and survival of anadromous fish species. Early migrating individuals show higher growth and survival rates, while first-time migrants have increased survival with body length and number of smolts migrating simultaneously.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Fisheries
Bror Jonsson, Nina Jonsson
Summary: The study found that offspring of anadromous brown trout grew better at higher temperatures, indicating a possible genetic factor rather than a maternal effect. Additionally, unlike previous studies on Atlantic salmon, egg incubation temperature did not influence later growth in brown trout.
JOURNAL OF FISH BIOLOGY
(2021)
Article
Biodiversity Conservation
L. Carugati, R. Melis, A. Cariani, A. Cau, V. Crobe, A. Ferrari, M. C. Follesa, M. L. Geraci, S. P. Iglesias, P. Pesci, F. Tinti, R. Cannas
Summary: Skates are difficult to identify due to their conservative body morphology, leading to taxonomic confusion and mislabelling. Accurate classification is crucial for reliable stock assessments and effective conservation plans, especially for endangered species.
ANIMAL CONSERVATION
(2022)
Article
Environmental Sciences
Giusy Catalano, Valentina Crobe, Alice Ferrari, Romano Baino, Daniela Massi, Antonino Titone, Cecilia Mancusi, Fabrizio Serena, Rita Cannas, Laura Carugati, Farid Hemida, Chiara Manfredi, Riccardo Melis, Giuseppe Scarcella, Letizia Sion, Marco Stagioni, Fausto Tinti, Alessia Cariani
Summary: The Mediterranean starry ray population in the Mediterranean Sea consists of three distinct units in the western, central-western, and central-eastern areas, with an admixture zone in the Strait of Sicily and the Ionian Sea. Analysis of rajid egg cases revealed the presence of more than one species in the admixture area, but predominantly egg cases laid by R. asterias.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
Article
Environmental Sciences
Alessandro Cau, Simone Franceschini, Davide Moccia, Pankaj A. Gorule, Blondine Agus, Andrea Bellodi, Rita Cannas, Laura Carugati, Danila Cuccu, Claudia Dessi, Martina F. Marongiu, Riccardo Melis, Antonello Mulas, Riccardo Porceddu, Cristina Porcu, Tommaso Russo, Maria Cristina Follesa
Summary: The analysis indicates that there is no temporal trend in the density and weight of seafloor macro-litter, but rather a spatial and bathymetric segregation of different litter categories. Different sources and physical features of macro-litter items lead to spatially segregated accumulation hotspots, with potential spots for future litter removal actions being shallower depths and closer to coastlines.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Francesco Palmas, Alessandro Cau, Cinzia Podda, Alessio Musu, Melissa Serra, Antonio Pusceddu, Andrea Sabatini
Summary: This study investigated the occurrence and distribution of Riverine Anthropogenic Macro-litter (RAM) in 37 river basins in Sardinia Island. The results showed that plastics, especially single-use items, were the most common and abundant RAM category. Statistical modeling revealed that the presence of lightweight RAM, particularly plastic, was mainly influenced by urban and agricultural land use, while the occurrence of heavy weighted RAM, such as large metal items and appliances, was influenced by the proximity of bridges and local population density.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Cinzia Podda, Francesco Palmas, Antonio Pusceddu, Andrea Sabatini
Summary: This study compared the occurrence of European eel in the Sardinian rivers between a historical period and recent data. The research found that dams have significantly disrupted the connectivity of the rivers, leading to a significant decrease in eel occurrence. The construction features and the time of dams' construction have negative effects on eel occurrence. Therefore, future restoration practices for eel should consider dam removal or modification, as well as the addition of fish ladders.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Biology
Riccardo Porceddu, Cinzia Podda, Giovanna Mulas, Francesco Palmas, Luca Picci, Claudia Scano, Saturnino Spiga, Andrea Sabatini
Summary: The density and morphology of dendritic spines in Anguilla anguilla were found to change during different life stages, with a relation to migration behavior. Studying the development of dendritic spines in the olfactory bulb of A. anguilla can provide insights into the processing mechanism of olfactory signals. Additionally, the modification of environmental stimuli may pose a threat to the migration behavior of this critically endangered species.
Article
Biochemistry & Molecular Biology
Aglaia Antoniou, Tereza Manousaki, Francisco Ramirez, Alessia Cariani, Rita Cannas, Panagiotis Kasapidis, Antonios Magoulas, Marta Albo-Puigserver, Elena Lloret-Lloret, Jose Maria Bellido, Maria Grazia Pennino, Maria Cristina Follesa, Antonio Esteban, Claire Saraux, Mario Sbrana, Maria Teresa Spedicato, Marta Coll, Costas S. Tsigenopoulos
Summary: By evaluating genetic variation across the entire genome, the study found evidence of local adaptation and population structuring in Sardina pilchardus, which is a highly exploited species. The findings highlight the importance of physical and ecological factors in maintaining population structure, and suggest the need for continuous monitoring under a seascape genomic approach. These results contribute to a deeper understanding of the species' responses to climate change and can aid in predicting future changes.
Article
Environmental Sciences
Riccardo Melis, Laura Vacca, Alessia Cariani, Laura Carugati, Charis Charilaou, Simone Di Crescenzo, Alice Ferrari, Maria Cristina Follesa, Cecilia Mancusi, Valentina Pinna, Fabrizio Serena, Letizia Sion, Fausto Tinti, Rita Cannas
Summary: The thornback ray is the most important chondrichthyan in terms of landings in the Mediterranean Sea. Genetic diversity information should be considered in fisheries management and conservation policies. Microsatellite markers were used to study the genetic features of thornback ray populations, revealing significant genetic differences between Mediterranean and Atlantic rays, as well as within the Mediterranean Sea.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2023)
Article
Marine & Freshwater Biology
Serenella Cabiddu, Pierantonio Addis, Francesco Palmas, Antonio Pusceddu
Summary: This study investigated the feeding preference of different predators on the alien Asian date mussel in a Mediterranean coastal lagoon. The results showed that the Mediterranean green crab was a more effective predator than the Say mud crab, while the banded dye-murex had almost no impact. This suggests the potential use of the native crab to limit the formation of byssus mats and mitigate their potential negative effects on the native communities.
MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE
(2023)
Article
Environmental Sciences
Riccardo Melis, Laura Vacca, Alessia Cariani, Laura Carugati, Alessandro Cau, Charis Charilaou, Simone Di Crescenzo, Alice Ferrari, Maria Cristina Follesa, Farid Hemida, Sarah Helyar, Sabrina Lo Brutto, Letizia Sion, Fausto Tinti, Rita Cannas
Summary: This study used microsatellite markers to analyze the population genetics of the small-spotted catshark. Significant genetic differences were found between geographic populations in the Mediterranean Sea and between the Mediterranean and the Atlantic Ocean. The results also suggest that the Strait of Gibraltar does not represent a complete barrier to the exchange of individuals between the Atlantic Ocean and the Mediterranean Sea.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Paolo Stara, Riccardo Melis, Andrea Bellodi, Maria Cristina Follesa, Carlo Corradini, Laura Carugati, Antonello Mulas, Michela Sibiriu, Rita Cannas
Summary: This study analyzed 270 specimens of Spatangidae trawled in the Sardinian seas to identify diagnostic characters at the genus level and distinguish two distinct forms within the studied material. Based on morphological and genetic analysis, most individuals were classified as Spatangus purpureus, while a few were similar to Spatangus raschi. Based on the differences, the authors propose to maintain the genus Spatangus and establish the new genus Propespatagus to include other species previously classified as Spatangus. These findings contribute to taxonomic clarification and species identification in the Mediterranean region.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Riccardo Melis, Simone Di Crescenzo, Alessia Cariani, Alice Ferrari, Valentina Crobe, Andrea Bellodi, Antonello Mulas, Laura Carugati, Elisabetta Coluccia, Maria Cristina Follesa, Rita Cannas
Summary: This study focused on three species of electric rays in the Mediterranean Sea, and found that the population in Sardinia has high genetic diversity and should be prioritized for conservation. The study also confirmed the presence of only the three species in the investigated area, but suggested the possibility of cryptic species in other regions and genera/families.
Article
Agriculture, Dairy & Animal Science
Alice Ferrari, Valentina Crobe, Rita Cannas, Rob W. Leslie, Fabrizio Serena, Marco Stagioni, Filipe O. Costa, Daniel Golani, Farid Hemida, Diana Zaera-Perez, Letizia Sion, Pierluigi Carbonara, Fabio Fiorentino, Fausto Tinti, Alessia Cariani
Summary: The Raja miraletus species complex shows high morphological and ecological stability in the Eastern Atlantic and Indian Oceans. Through genetic analysis, we discovered multiple sibling taxa and cryptic speciation, supporting the idea of stabilising selection. Despite high species diversity, skates (Rajiformes) have conserved morphology and ecology. Our study confirms the taxonomic boundaries of three recognized species and reveals hidden genetic structures that can contribute to conservation efforts.
Article
Biology
Francesco Palmas, Paolo Casula, Francesco Curreli, Cinzia Podda, Serenella Cabiddu, Andrea Sabatini
Summary: This study compares two visual survey techniques, one from streambanks and one using underwater cameras, to monitor endangered Mediterranean trout in small intermittent streams. The effectiveness of these methods in detecting patterns in fish occupancy in relation to environmental factors was assessed. The results showed that underwater camera surveys performed similarly to visual surveys from streambanks during low-flow regimes, while visual surveys were less effective during high flow regimes. Pool volume and the percentage cover of submerged macrophytes were found to be significant environmental variables affecting fish detection probability using underwater cameras. On the other hand, high turbulence rates had a clear impact on pool occupancy according to visual observations from streambanks. Overall, visual methods were found to be useful in describing the occupancy patterns of Mediterranean trout in small streams.
Article
Fisheries
Margherita Toma, Marzia Bo, Riccardo Cattaneo-Vietti, Simonepietro Canese, Martina Canessa, Rita Cannas, Frine Cardone, Laura Carugati, Alessandro Cau, Giuseppe Corriero, Maria Cristina Follesa, Maria Mercurio, Silvestro Greco, Franco Andaloro, Giorgio Bavestrello
Summary: An analysis of ROV dives along the Italian coasts revealed the current distribution and habitat preferences of the red coral species Corallium rubrum. The species is widespread, with higher abundance in Sardinia. It prefers depths between 75 m and 125 m, and thrives in habitats dominated by crustose coralline algae.
MEDITERRANEAN MARINE SCIENCE
(2022)
