Article
Biochemistry & Molecular Biology
Takashi Abe, Masaki Ichimura, Hideaki Kudo
Summary: This study found that the expression of the syp gene is strong in the olfactory nervous system of chum salmon during the homeward migration and temporarily increases. These expression changes are similar to the snare genes, suggesting that the synchronous expression of syp and snare component genes is crucial for the development and short-term plasticity of the olfactory nervous system involved in olfactory imprinting.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Fisheries
Malia E. Armstrong, David Minkoff, Andrew H. Dittman, Darran May, Eric K. Moody, Thomas P. Quinn, Jelle Atema, William R. Ardren
Summary: The study reveals that olfactory imprinting in Atlantic salmon can occur before the parr-to-smolt transformation, and that the water source during development may affect endocrine and imprinting responses.
ECOLOGY OF FRESHWATER FISH
(2022)
Article
Multidisciplinary Sciences
Audun H. Rikardsen, David Righton, John Fredrik Strom, Eva B. Thorstad, Patrick Gargan, Timothy Sheehan, Finn Okland, Cedar M. Chittenden, Richard D. Hedger, Tor F. Naesje, Mark Renkawitz, Johannes Sturlaugsson, Pablo Caballero, Henrik Baktoft, Jan G. Davidsen, Elina Halttunen, Serena Wright, Bengt Finstad, Kim Aarestrup
Summary: The study found that the mechanisms driving range-wide reductions in Atlantic salmon marine survival are hindered by a lack of understanding of their oceanic ecology and distribution. The individual salmon migrated further and in different directions than previously reported, showing increased diving activity near oceanographic fronts, highlighting the importance of these regions as feeding areas. Differences in oceanic distribution among individuals and populations may contribute to variations in growth and survival due to environmental conditions.
SCIENTIFIC REPORTS
(2021)
Article
Ecology
Lene Klubben Sortland, Robert J. Lennox, Gaute Velle, Knut Wiik Vollset, Marius Kambestad
Summary: The return of Eurasian otters to western Norway has led to conflicts with humans due to their predation on vulnerable Atlantic salmon populations. The predation by otters has a potential impact on salmon spawning stock and ecosystem services, but there is no evidence of selective killing of salmon based on characteristics. The presence of more holding areas in one river may provide predation refuges for adult salmon, suggesting that management decisions should consider river-specific evaluations.
FRESHWATER BIOLOGY
(2023)
Article
Fisheries
Matthew A. Mensinger, James P. Hawkes, Graham S. Goulette, Alessio Mortelliti, Erik J. Blomberg, Joseph D. Zydlewski
Summary: This study found that diadromous fish populations, including Atlantic salmon smolts, are facing significant declines due to human-made barriers and predation. Specifically, hydropower projects exacerbate predation pressure on Atlantic salmon smolts, with the lower estuary experiencing higher predation rates than expected.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Fisheries
Matthew Newton, James Barry, Angus Lothian, Robert Main, Hannele Honkanen, Simon Mckelvey, Paul Thompson, Ian Davies, Nick Brockie, Alastair Stephen, Rory O'Hara Murray, Ross Gardiner, Louise Campbell, Paul Stainer, Colin Adams
Summary: The study found that post-smolts of salmon do not disperse randomly during migration, but choose common migration pathways. They do not simply take advantage of currents to migrate, but actively swim to select routes.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Fisheries
John Gilbey, Kjell Rong Utne, Vidar Wennevik, Alexander Christian Beck, Kyrre Kausrud, Kjetil Hindar, Carlos Garcia de Leaniz, Corrine Cherbonnel, Jamie Coughlan, Tom F. Cross, Eileen Dillane, Dennis Ensing, Eva Garcia-Vazquez, Lars R. Hole, Marianne Holm, Jens Christian Holst, Jan Arge Jacobsen, Arne J. Jensen, Sten Karlsson, Niall O. Maoileidigh, Kjell Arne Mork, Einar Eg Nielsen, Leif Nottestad, Craig R. Primmer, Paulo Prodohl, Sergey Prusov, Jamie R. Stevens, Katie Thomas, Ken Whelan, Philip McGinnity, Eric Verspoor
Summary: The study reveals significant migrational post-smolt aggregations off the continental shelf-edge of Ireland, Scotland, and Norway, as well as an important marine foraging area in the Norwegian Sea. Genetic analysis shows that aggregational stock composition does not simply reflect distance to natal rivers, with northern phylogeographic stock groups significantly under-represented in high-seas aggregations.
FISH AND FISHERIES
(2021)
Article
Biochemistry & Molecular Biology
Emanuela Teveroni, Fiorella Di Nicuolo, Edoardo Vergani, Carmine Bruno, Giuseppe Maulucci, Giada Bianchetti, Anna Laura Astorri, Giuseppe Grande, Jacopo Gervasoni, Lavinia Santucci, Marco De Spirito, Andrea Urbani, Alfredo Pontecorvi, Francesca Mancini, Domenico Milardi
Summary: The study demonstrates the activation of sperm cells through the olfactory receptor 51E2 (OR51E2) upon stimulation with volatile short-chain fatty acids (SCFAs). SCFAs promote sperm migration and a more linear sperm-cell orientation. The study also reveals the ability of cervical mucus to directly activate sperm cells. These findings provide insights into the role of chemosensory receptors in reproductive activity and offer potential strategies for the treatment of infertility.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Immunology
M. Fernanda Palominos, Cristian Calfun, Gino Nardocci, Danissa Candia, Jorge Torres-Paz, Kathleen E. Whitlock
Summary: In the olfactory organs, a unique population of neutrophils associated with both the olfactory epithelia and the lymphatic vasculature suggests a dual olfactory-immune function.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Ecology
Hannele M. Honkanen, Danielle L. Orrell, Matthew Newton, Simon McKelvey, Alastair Stephen, R. Alistair Duguid, Colin E. Adams
Summary: The study found that the success rate of Atlantic salmon migration through standing waters is generally low, possibly due to a lack of navigational cues. The impact of impounded lakes on Atlantic salmon migration is not significantly different from that of naturally draining lakes, and may depend more on factors such as lake basin shape, exit route, and navigational cues available to the fish.
ECOLOGICAL ENGINEERING
(2021)
Article
Biodiversity Conservation
Knut Wiik Vollset, Robert J. Lennox, Anders Lamberg, Oystein Skaala, Anne Dagrun Sandvik, Harald Saegrov, Eli Kvingedal, Torstein Kristensen, Arne Johan Jensen, Tormod Haraldstad, Bjorn Torgeir Barlaup, Ola Ugedal
Summary: Accurate predictions about the timing of Atlantic salmon smolt migration between freshwater and marine environments are crucial for effective management. This study used data from 41 rivers in Norway to develop a predictive model, finding that air temperature and counting method significantly influenced the timing of smolt emigration. The model suggested that previous national estimates underestimated migration timing in southern populations.
DIVERSITY AND DISTRIBUTIONS
(2021)
Article
Fisheries
Lea Marie Hellenbrecht, Kjell Rong Utne, Orjan Karlsen, Kevin Alan Glover, Vidar Wennevik
Summary: The transition from freshwater to saltwater is challenging for Atlantic salmon, and survival during this critical life stage is believed to affect adult population abundance. However, the role of feeding in influencing growth and survival is not well-studied. In this study, we analyzed the diet of post-smolts captured in Norwegian fjords and found that their diet mainly consisted of fish larvae, krill, planktonic amphipods, and insects. Diet varied among fjords and years, with post-smolts in northern Norway displaying a higher frequency of fish larvae in their diet. Post-smolts consuming fish larvae and/or krill had higher feeding ratios and were longer on average, indicating the importance of these prey items for marine growth and survival. These findings may have implications for Atlantic salmon marine survival rates in the region.
FISHERIES RESEARCH
(2023)
Review
Food Science & Technology
Sherry Stephanie Chan, Bjorn Roth, Flemming Jessen, Anita Nordeng Jakobsen, Jorgen Lerfall
Summary: This review focuses on the water holding properties of Atlantic salmon, evaluating the methods used to measure them and how pre- and postmortem factors, processing, and preservation methods influence these properties and their correlations to other quality parameters. Various methods are available to measure water holding capacity (WHC), with the centrifugation method being the most prevalent but other non-invasive and cost-effective approaches increasingly preferred. The diversity of methods makes direct comparison of results from previous research relative unless the same method is used with the same conditions.
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
(2022)
Article
Ecology
Joacim Naslund, Rachel E. Bowes, Larry Greenberg, Eva Bergman
Summary: River connectivity is important for fish migration, but anthropogenic barriers cause delays and mortality. This experiment investigated the effects of adding cobble in surface bypasses on the downstream movement of Atlantic salmon smolts. It also examined the impact of flow velocity on bypass acceptance.
ECOLOGICAL ENGINEERING
(2022)
Article
Biodiversity Conservation
Per Gunnar Fjelldal, Samantha Bui, Tom J. Hansen, Frode Oppedal, Gunnar Bakke, Lea Hellenbrecht, Sofie Knutar, Abdullah Sami Madhun
Summary: This study reveals that wild Atlantic salmon postsmolts can enter sea-cages stocked with farmed Atlantic salmon, and even wild sea trout and salmon/trout hybrid postsmolts were found inside the sea-cages. Understanding the extent of such bycatch in commercial aquaculture is crucial for the conservation of Atlantic salmon and sea trout, with further research encouraged to evaluate the possible ghost fishing phenomena.
CONSERVATION SCIENCE AND PRACTICE
(2021)
Correction
Genetics & Heredity
Quentin Rougemont, Jean-Sebastien Moore, Thibault Leroy, Eric Normandeau, Eric B. Rondeau, Ruth E. Withler, Donald M. Van Doornik, Penelope A. Crane, Kerry A. Naish, John Carlos Garza, Terry D. Beacham, Ben F. Koop, Louis Bernatchez
Article
Biology
Qiaowei Pan, Romain Feron, Elodie Jouanno, Hugo Darras, Amaury Herpin, Ben Koop, Eric Rondeau, Frederick W. Goetz, Wesley A. Larson, Louis Bernatchez, Mike Tringali, Stephen S. Curran, Eric Saillant, Gael P. J. Denys, Frank A. von Hippel, Songlin Chen, J. Andres Lopez, Hugo Verreycken, Konrad Ocalewicz, Rene Guyomard, Camille Eche, Jerome Lluch, Celine Roques, Hongxia Hu, Roger Tabor, Patrick DeHaan, Krista M. Nichols, Laurent Journot, Hugues Parrinello, Christophe Klopp, Elena A. Interesova, Vladimir Trifonov, Manfred Schartl, John Postlethwait, Yann Guiguen
Summary: This study traced the evolution of sex determination in an entire teleost order through following the fate of a master sex-determining gene in northern pike, revealing that the gene originated from a gene duplication event 65 to 90 million years ago and remained sex linked on undifferentiated sex chromosomes for at least 56 million years in multiple species. Various independent species- or population-specific sex determination transitions, including the recent loss of a Y chromosome, were identified. Occasional sex reversals and genetic bottlenecks were proposed as non-adaptive explanations for sex determination transitions.
Correction
Environmental Sciences
K. K. S. Layton, P. V. R. Snelgrove, J. B. Dempson, T. Kess, S. J. Lehnert, P. Bentzen, S. J. Duffy, A. M. Messmer, R. R. E. Stanley, C. DiBacco, S. J. Salisbury, D. E. Ruzzante, C. M. Nugent, M. M. Ferguson, J. S. Leong, B. F. Koop, I. R. Bradbury
NATURE CLIMATE CHANGE
(2021)
Article
Multidisciplinary Sciences
M. E. Lopez, M. Cadiz, E. B. Rondeau, B. F. Koop, J. M. Yanez
Summary: This study aims to identify selection signatures involved in adaption to culture conditions and traits of productive interest in coho salmon through genotyping and analysis, detecting several signatures of selection on different chromosomal regions. This can contribute to understanding the genetic mechanisms of phenotypic diversity in coho salmon.
SCIENTIFIC REPORTS
(2021)
Article
Ecology
Sarah J. Salisbury, Gregory R. McCracken, Robert Perry, Donald Keefe, Kara K. S. Layton, Tony Kess, Cameron M. Nugent, Jong S. Leong, Ian R. Bradbury, Ben F. Koop, Moira M. Ferguson, Daniel E. Ruzzante
Summary: The genetic consequences associated with the loss of migratory capacity of landlocked diadromous fishes in freshwater are not well understood. Selective pressures in freshwater residency can lead to differentiation between landlocked and anadromous populations, as well as within landlocked populations. However, genetic drift in isolated landlocked populations may limit consistent adaptation. Understanding the genetic parallelism can have implications for evolution and management practices.
AMERICAN NATURALIST
(2022)
Article
Fisheries
Tricia L. Rubi, Alana G. McPherson, Niloufar Mokariasl, Ben F. Koop, Briony Campbell, John S. Taylor
Summary: The study on brood stock selection in Golden Eagle Sablefish hatchery shows potential for enhancing early survival rates. Analysis of a 2019 hatchery cohort revealed significant variations in productivity at both individual and family levels, with few breeding individuals contributing to the majority of offspring.
AQUACULTURE RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Quentin Rougemont, Amanda Xuereb, Xavier Dallaire, Jean-Sebastien Moore, Eric Normandeau, Eric B. Rondeau, Ruth E. Withler, Donald M. Van Doornik, Penelope A. Crane, Kerry A. Naish, John Carlos Garza, Terry D. Beacham, Ben F. Koop, Louis Bernatchez
Summary: This study investigated the genomic basis of local adaptation in Coho salmon across North America and found that migration distance is the primary selective factor. Several candidate genetic variations associated with long-distance migration and altitude were also identified.
Article
Genetics & Heredity
Jay Joshi, Anne-Marie Flores, Kris A. Christensen, Hollie Johnson, Ahmed Siah, Ben F. Koop
Summary: This study used long-read sequencing technology to update the genome assemblies of Atlantic and Pacific salmon lice, and identified unique genomic features of their sex chromosomes. Moreover, conserved orthologous protein sequences were found between the W- and Z-chromosomes.
G3-GENES GENOMES GENETICS
(2022)
Article
Fisheries
Carlo A. Biagi, Rosalind A. Leggatt, Dionne Sakhrani, Mike Wetklo, Wendy E. Vandersteen, Kris A. Christensen, Eric B. Rondeau, Breanna M. Watson, Kyle W. Wellband, Ben F. Koop, Ruth E. Withler, Robert H. Devlin
Summary: Doubled haploid gynogens are individuals with two identical maternal chromosome sets and no paternal genetic contributions. They are useful in whole-genome sequence assembly to eliminate allelic variation. This study successfully determined the timing for producing doubled haploid gynogens in multiple salmonid species and assessed their survival rate and genotypes.
NORTH AMERICAN JOURNAL OF AQUACULTURE
(2022)
Article
Evolutionary Biology
Amanda Xuereb, Quentin Rougemont, Xavier Dallaire, Jean-Sebastien Moore, Eric Normandeau, Berenice Bougas, Alysse Perreault-Payette, Ben F. Koop, Ruth Withler, Terry Beacham, Louis Bernatchez
Summary: This study evaluated the current conservation units (CUs) for Coho salmon in Canada using a large genomic dataset and compared patterns of genetic variation using neutral and outlier loci. The results suggest that the current CU boundaries are generally appropriate, but there may be a need for refinement in certain areas.
EVOLUTIONARY APPLICATIONS
(2022)
Article
Genetics & Heredity
Eric B. Rondeau, Kris A. Christensen, David R. Minkley, Jong S. Leong, Michelle T. T. Chan, Cody A. Despins, Anita Mueller, Dionne Sakhrani, Carlo A. Biagi, Quentin Rougemont, Eric Normandeau, Steven J. M. Jones, Robert H. Devlin, Ruth E. Withler, Terry D. Beacham, Kerry A. Naish, Jose M. Yanez, Roberto Neira, Louis Bernatchez, William S. Davidson, Ben F. Koop
Summary: The coho salmon populations in North America have significantly declined, and analysis of genomic data suggests bottleneck events after glacial retreat as a possible cause. A chromosome-level genome assembly and genome resequencing of 83 coho salmon were performed to aid in stock management and conservation efforts.
G3-GENES GENOMES GENETICS
(2023)
Article
Genetics & Heredity
Eric B. Rondeau, Kris A. Christensen, Hollie A. Johnson, Dionne Sakhrani, Carlo A. Biagi, Mike Wetklo, Cody A. Despins, Rosalind A. Leggatt, David R. Minkley, Ruth E. Withler, Terry D. Beacham, Ben F. Koop, Robert H. Devlin
Summary: Chum salmon genome was sequenced and assembled using Oxford Nanopore and Flye software. Genome assembly was characterized by resequencing 59 chum salmon from hatchery sources. Genes involved in immune system and toxin response were found to be enriched in regions collapsed due to duplicated chromosomes from ancient genome duplication.
G3-GENES GENOMES GENETICS
(2023)
Article
Genetics & Heredity
Anne-Marie Flores, Kris A. Christensen, Briony Campbell, Ben F. Koop, John S. Taylor
Summary: Sablefish, a type of cod, is found in coastal regions of the Pacific Ocean and has been subjected to a declining trend in stock biomass and landings since 2010. The genetic variation in growth rate, disease resistance, and survival among sablefish individuals and cohorts is not well understood. This study provides a comprehensive genome assembly of sablefish, which can be utilized for SNP-based surveys and management of both aquaculture and wild fishery.
G3-GENES GENOMES GENETICS
(2023)
Article
Fisheries
Morgan D. Hocking, Jeffrey C. MacAdams, Michael J. Allison, Lauren C. Bergman, Robert Sneiderman, Ben F. Koop, Brian M. Starzomski, Mary L. Lesperance, Caren C. Helbing
Summary: A current challenge in environmental DNA (eDNA) applications is accounting for environmental background in surveys. This study conducted two controlled experiments using a coho salmon eDNA assay, demonstrating a novel method to detect target species eDNA in the presence of background and providing a statistically robust assessment for eDNA surveys.
Article
Ecology
Lauren H. Henson, Niko Balkenhol, Robert Gustas, Megan Adams, Jennifer Walkus, William G. Housty, Astrid Stronen, Jason Moody, Christina Service, Donald Reece, Bridgett M. VonHoldt, Iain McKechnie, Ben F. Koop, Chris T. Darimont
Summary: Landscape genetic analyses of grizzly bear populations in coastal British Columbia, Canada, revealed the possible effects of complex landscape and human influences on genetic structure. The study found spatial alignment between Indigenous language families and grizzly bear genetic groups, suggesting that people and wildlife populations may have been shaped by the landscape in similar ways. This research provides new genetic evidence to support locally led management of grizzly bears in the future.
ECOLOGY AND SOCIETY
(2021)
