Article
Fisheries
Konstanze Steiner, Kevin Heasman, Olivier Laroche, Xavier Pochon, Mark Preece, John P. Bowman, Seumas P. Walker, Jane E. Symonds
Summary: The intestinal microbiome of Chinook salmon consists mainly of Firmicutes, Bacteroidetes, Proteobacteria, and Actinobacteria, which are partially shared among feces, surrounding water, and feed. Some bacterial taxa are only present in feces, indicating possible acquisition or growth in the gut rather than the surrounding environment. Inter-individual variation suggests host-specific variability that needs further investigation.
Article
Fisheries
Cong-mei Xu, Hai-rui Yu, Ling-yao Li, Min Li, Xiang-yi Qiu, Sha-sha Zhao, Xiao-qian Fan, Yan-lin Fan, Ling-ling Shan
Summary: This study investigated the dietary vitamin A requirement of coho salmon post-smolts. The results showed that increasing dietary vitamin A levels led to higher specific growth rate, increased activity of certain liver enzymes, and decreased liver lipid content. These findings are valuable for optimizing salmon aquaculture and feed formulation.
Article
Ecology
Clare J. Venney, Ben J. G. Sutherland, Terry D. Beacham, Daniel D. Heath
Summary: Population differences in DNA methylation were found at eight out of 23 gene loci, which were not correlated with freshwater environmental parameters but more likely related to unmeasured oceanic environmental conditions, local adaptation, and/or genetic drift. The weak correlation between DNA methylation dissimilarity and microsatellite-based genetic differentiation suggests potential influences on organism phenotype, adaptive potential, and population resilience.
ECOLOGY AND EVOLUTION
(2021)
Article
Chemistry, Applied
Senni J. Bunga, Mirja Kaizer Ahmmed, Blair Lawley, Alan Carne, Alaa El-Din Ahmed Bekhit
Summary: A jeotgal-like product was fermented from Chinook salmon roe for 30 days, resulting in decreased water activity and pH value. Bacterial and LAB counts increased up to 12 days of processing and fatty acid composition changed, with a decrease in SFA and an increase in PUFA content. The concentrations of astaxanthin, lutein, and phospholipids increased, while cholesterol and tocopherol contents decreased at the end of fermentation.
Article
Biochemistry & Molecular Biology
Javad Sadeghi, Subba Rao Chaganti, Daniel D. Heath
Summary: Differences in gut microbiome composition have significant effects on host gene expression patterns, particularly in immune, developmental and metabolic processes. Antibiotic and probiotic treatments significantly alter the gut and aquatic microbiota, as well as gene expression profiles in fish. Antibiotic treatment leads to downregulation of immunity and upregulation of apoptosis, while probiotic treatment upregulates genes related to post-translation modification and inflammatory responses. Lactobacillaceae and Bifidobacteriaceae are associated with host gene expression patterns. Understanding these interactions can inform new strategies for preventing/treating microbiome disruption-related diseases.
Article
Engineering, Environmental
Jason T. Magnuson, Neil Fuller, Kara E. Huff Hartz, Sara Anzalone, Gregory W. Whitledge, Shawn Acuna, Michael J. Lydy, Daniel Schlenk
Summary: This study investigated the effects of dietary exposure to bifenthrin and fipronil on the swimming performance, energetic processes, and liver health of juvenile Chinook salmon. The results showed that the ingestion of bifenthrin and the mixture of bifenthrin and fipronil significantly reduced swimming performance and affected certain biochemical indicators, while the ingestion of fipronil alone did not have a significant effect.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Rebekah L. L. Horn, Shawn R. R. Narum
Summary: This study provides a detailed description of genomic variation in Chinook salmon, focusing on a region that affects migration timing. The researchers analyzed genomic structure within and among lineages and examined the selective sweep at the migration timing region. They found that neutral variation supported fine-scale population structure, while variation in the migration timing region was correlated with the mean return timing of different lineages. They also identified a duplicated block within the migration timing region that contributes to phenotypic variation.
Article
Fisheries
Donald A. Larsen, Abby E. Fuhrman, Deborah L. Harstad, David A. Venditti, Brian R. Beckman
Summary: The age of maturation in salmonid species is phenotypically plastic and dependent on a genetically set threshold in growth. Hatchery supplementation programs that integrate natural-origin adults into broodstock can minimize differences between hatchery and wild fish and affect the life history of salmonids.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Biology
Essie M. Rodgers, Daniel F. Gomez Isaza
Summary: By testing the impact of different stress conditions on the heat tolerance of juvenile Chinook salmon, the study found that mild stress exposure can enhance their tolerance to high temperatures, while severe stress exposure can reduce heat tolerance. The development of cross-tolerance is influenced by the type and severity of stress.
JOURNAL OF THERMAL BIOLOGY
(2022)
Article
Fisheries
Paula Casanovas, Seumas P. Walker, Hazel Johnston, Colin Johnston, Jane E. Symonds
Summary: Blood biochemistry and haematological parameters in fish are affected by environmental changes, stress, and health status. The study provides baseline data and reference ranges for 34 indicators in Chinook salmon, showing significant differences in some parameters between freshwater and seawater environments. Some parameters were also found to be correlated with fish size.
Article
Geochemistry & Geophysics
Megan K. Nims, Timothy J. Linley, James J. Moran
Summary: Oxygen thermometry is widely used to reconstruct thermal history, but interpretation can be affected by vital effects. We studied the relationship between temperature and oxygen isotope fractionation in otoliths of Chinook salmon. Our results showed that temperature and otolith precipitation rate significantly affected the oxygen isotope fractionation, while somatic growth rate did not. Kinetic effects were observed in the oxygen isotope fractionation in Chinook salmon otoliths, and these effects were constrained at higher temperatures by other processes involved in mineral formation. Species-specific fractionation equations have utility in reconstructing temperature history in Pacific salmon, but potential inferential uncertainty should be considered.
APPLIED GEOCHEMISTRY
(2023)
Article
Biodiversity Conservation
Michael J. Ford, Ewann A. Berntson, Paul Moran, Garrett J. McKinney
Summary: Captive propagation is commonly used for conservation, but its genetic effects at a genomic level have not been well studied. This research used genome sequences from 80 Chinook salmon individuals to examine genetic variation across different paired groups. The results showed that captive and natural fish with high fitness had similar genomic variation, indicating minimal allele frequency differences within one generation. However, distinct Evolutionarily Significant Units (ESUs) showed greater genetic divergence, suggesting the need for efforts to limit genetic differences between captive and natural populations.
CONSERVATION GENETICS
(2023)
Article
Fisheries
Leteisha A. Prescott, Jane E. Symonds, Seumas P. Walker, Matthew R. Miller, Jayson M. Semmens, Chris G. Carter
Summary: Exercise training is important in salmon hatcheries for enhancing production-related traits. Moderate flow regimes can improve swimming and metabolic performance in Chinook salmon, including those with spinal curvature. Exercise regimes also lead to morphological changes in muscle fibers, gill, and skin. This study highlights the benefits of exercise training in hatchery settings and provides insights into nutrient utilization in salmon farming.
Article
Environmental Sciences
Bonnie P. Lo, Vicki L. Marlatt, Xiangjun Liao, Sofya Reger, Carys Gallilee, Andrew R. S. Ross, Tanya M. Brown
Summary: The breakdown product of a rubber tire antioxidant has been found to cause toxic injury and death in coho salmon. Coho salmon are more sensitive to this product compared to Chinook salmon. This research highlights the importance of protecting Chinook salmon and their habitat.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2023)
Article
Biodiversity Conservation
Guillermo Figueroa-Munoz, J. Andres Olivos, Ivan Arismendi, Graciela Fabiano, Martin Laporta, Santiago Silveira, Ivan Gonzalez-Bergonzoni, Guido Pavez, Billy Ernst, Javier E. Ciancio, Chris Harrod, Cecilia Y. Di Prinzio, Tomas Chalde, Christina A. Murphy, Daniel Gomez-Uchida
Summary: Chinook salmon have successfully established naturalized populations in South America, particularly in Patagonia. This study presents updated information on the regional distribution of Chinook salmon, revealing a significant expansion of their range both to the north and south of the previously known colonized areas. This expansion includes major basins draining to both the Pacific and Atlantic coasts and highlights the ongoing invasion of Chinook salmon in South America.
BIOLOGICAL INVASIONS
(2023)
Article
Fisheries
N. Sergeenko, E. A. Ustimenko, M. G. Eliseikina, A. D. Kuhlevskiy, E. Bochkova, T. Ryazanova
DISEASES OF AQUATIC ORGANISMS
(2020)
Article
Genetics & Heredity
Alla G. Oleinik, Lubov A. Skurikhina, Andrey D. Kukhlevsky, Alexander A. Semenchenko
MITOCHONDRIAL DNA PART B-RESOURCES
(2020)
Article
Biodiversity Conservation
Alla G. Oleinik, Lubov A. Skurikhina, Andrey D. Kukhlevsky, Alexander A. Semenchenko
Summary: Sequencing of the complete mitochondrial genomes of Boganida charr and smallmouth charr revealed their close phylogenetic relationship with Taranetz charr, suggesting a common ancestor. It is hypothesized that the origin of Boganida charr and smallmouth charr may result from a double invasion of the lake by ancestral lineages of Taranetz charr during postglacial periods.
Article
Microbiology
Marina G. Eliseikina, Irina A. Beleneva, Andrey D. Kukhlevsky, Ekaterina Shamshurina
Summary: A cultivated form of bacteria, identified as Pseudoalteromonas piscicida, was isolated from the hemolymph of the bivalve mollusk Modiolus kurilensis. Strain 2202 exhibits antimicrobial activity against certain pathogens and selective toxicity towards larvae of various invertebrates, suggesting its potential applications in aquaculture as a probiotic and source of antimicrobial substances. The behavior of strain 2202 as a predator-like facultative predator should be considered when exploring its biotechnological potential.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Zoology
T. Ryazanova, M. G. Eliseikina, A. D. Kukhlevsky
Summary: A parasitic dinoflagellate of the genus Hematodinium was found in three species of crabs off the Pacific coast of Kamchatka: red king crab Paralithodes camtschaticus, tanner crab Chionoecetes bairdi, and spiny king crab Paralithodes brevipes. The genetic analysis showed that the pathogen infecting these crabs was similar to Hematodinium sp. found in many crustaceans in the Northern Hemisphere. The prevalence of infection was 0.2% for tanner crabs and 2.7% for red king crabs, with similarities in macroscopic and microscopic signs of the pathology.
JOURNAL OF INVERTEBRATE PATHOLOGY
(2021)
Article
Microbiology
Olga Nedashkovskaya, Andrey D. Kukhlevskiy, Song-Gun Kim, Nadezhda Y. Otstavnykh, Natalia Zhukova, Marina P. Isaeva
Summary: A novel yellow-orange-pigmented bacterium, designated Aureibaculum algae sp. nov., was isolated from the red alga Ahnfeltia tobuchiensis, and it belongs to the family Flavobacteriaceae, phylum Bacteroidetes.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Evolutionary Biology
Alla G. Oleinik, Evgeniia Bondar, Andrey D. Kukhlevsky, Lubov A. Skurikhina, Natalia E. Kovpak
Summary: Genetic analysis revealed that charrs from Lake Grand are closely related to the Bering lineage and historical mtDNA introgression occurred from S. malma malma to S. taranetzi. Postglacial secondary contact between representatives of the Arctic and Bering lineages was observed along the Sea of Okhotsk coast, with past hybridization in Lake Grand.
JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH
(2021)
Article
Genetics & Heredity
Alla G. Oleinik, Andrey D. Kukhlevsky, Lubov A. Skurikhina
Summary: The complete mitochondrial genomes of two individuals of charr Salvelinus alpinus erythrinus from Arctic Canada were studied. The results show a low difference between the two genomes, indicating the phylogenetic closeness of S. alpinus erythrinus and Salvelinus sp. 4 from Lake Nachikinskoe, Kamchatka, and their common ancestry.
MITOCHONDRIAL DNA PART B-RESOURCES
(2022)
Article
Genetics & Heredity
Alla G. Oleinik, Andrey D. Kukhlevsky, Lubov A. Skurikhina
Summary: The complete mitochondrial genomes of three individuals of the endemic charr Salvelinus sp. 4 from Lake Nachikinskoe (Kamchatka, Russia) were sequenced, and the low level of sequence divergence between Salvelinus sp. 4 and GenBank Salvelinus taranetzi genomes suggests recent divergence and a common ancestor. These findings have significant implications for resolving the taxonomic status of endemic charr in the genus Salvelinus.
MITOCHONDRIAL DNA PART B-RESOURCES
(2022)
Article
Marine & Freshwater Biology
A. G. Oleinik, A. D. Kukhlevsky, L. A. Skurikhina
Summary: A comparative analysis revealed the close relationships between the endemic charr from Lake Nachikinskoe and closely related charrs from Asia and North America. The charr from Lake Nachikinskoe is confirmed to be an isolated population of the Taranetz charr, representing the Arctic phylogenetic group.
RUSSIAN JOURNAL OF MARINE BIOLOGY
(2022)
Article
Microbiology
Olga I. Nedashkovskaya, Nadezhda Y. Otstavnykh, Song-Gun Kim, Andrey D. Kukhlevskiy, Natalia V. Zhukova, Marina P. Isaeva
Summary: A novel Gram-staining negative, strictly aerobic, rod-shaped, and non-motile bacterium, Algicella marina, was isolated from the red alga Tichocarpus crinitus. It belongs to the family Rhodobacteraceae, the order Rhodobacterales, the class Alphaproteobacteria, and the phylum Pseudomonadota.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
I. A. Beleneva, U. Kharchenko, A. D. Kukhlevsky, A. Boroda, N. Izotov, A. S. Gnedenkov, V. S. Egorkin
Summary: Selenium and tellurium nanoparticles were synthesized using green technology, and were found to possess antimicrobial, antifouling, and cytotoxic activities. Moreover, their use in coatings can reduce the environmental pressure.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2022)
Article
Oceanography
N. P. Sanamyan, K. E. Sanamyan, A. D. Kukhlevskiy, T. B. Morozov, S. V. Galkin, S. I. Kiyashko, V. V. Mordukhovich
Summary: Two species of sea anemones, Sagartiogeton californicus and Sagartiogeton rufus sp. nov., were found in the reducing environments of the Bering Sea. The former is abundant in both methane seep sites and the background, as well as in hydrothermal vents on the Piip Volcano, while the latter forms crowded settlements in hydrothermal vent areas on the Northern summit of the same volcano. The taxonomy of Sagartiogeton and related genera was discussed.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2023)
Article
Zoology
T. V. Ryazanova, M. G. Eliseikina, A. D. Kukhlevsky
Summary: Milky hemolymph syndrome (MHS) caused by a bacilliform virus (BV) was found in tanner crab Chionoecetes bairdi in Kamchatka. The disease leads to hypertrophy of cells and the presence of two types of virus particles. It is structurally similar to CoBV found in Chionoecetes opilio.
JOURNAL OF INVERTEBRATE PATHOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Alla G. G. Oleinik, Andrey D. D. Kukhlevsky, Lubov A. A. Skurikhina, Elena A. A. Shubina
Summary: This study sequenced and compared the mitochondrial genomes of three narrow-ranged, endemic charr species. The results showed similarity in genome length and high AT content, suggesting the possible reclassification of one of the species.
MOLECULAR BIOLOGY REPORTS
(2023)