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
Ecology
Olivia M. Simmons, Stephen D. Gregory, Phillipa K. Gillingham, William D. Riley, Luke J. Scott, J. Robert Britton
Summary: This study investigated the impacts of various biological and environmental factors on the migration timing of individual Atlantic salmon smolts. It found that warmer winters, daily changes in water temperature and discharge, as well as the location and size of the smolts influenced their migration timing. The results highlight the importance of considering a wide range of variables in understanding and predicting the phenology of smolt migrations.
FRESHWATER BIOLOGY
(2021)
Article
Fisheries
Ingrid A. Johnsen, Alison Harvey, Pal Naeverlid Saevik, Anne D. Sandvik, Ola Ugedal, Bjorn Adlandsvik, Vidar Wennevik, Kevin A. Glover, Orjan Karlsen
Summary: This study focused on the environmental challenges of salmonid aquaculture, estimating the impact of salmon lice on wild salmon mortality in Norwegian waters using models and data analysis. Results showed that aquaculture-produced salmon lice led to varying mortality rates of wild salmon post-smolts in different rivers.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Environmental Sciences
Andrew B. Harbicht, P. Anders Nilsson, Martin Osterling, Olle Calles
Summary: Through observing the passage of radio-tagged Atlantic salmon smolts through nine river sections, this study found that migration rates are primarily influenced by physical river properties, biological traits, and seasonal variables rather than anthropogenic factors. The negative impact of reservoirs may be mainly due to their influence on river width, and spilling water as a mitigative measure can reduce delays. However, the effects of dams on migratory fish species may still be observed due to passage effects.
RIVER RESEARCH AND APPLICATIONS
(2021)
Article
Agriculture, Dairy & Animal Science
Renate Kvingedal, Jannicke Vigen, Dominic Nanton, Kari Ruohonen, Kiranpreet Kaur
Summary: Optimal nutrition is crucial for the early seawater phase of Norwegian-farmed Atlantic salmon, which faces higher mortality and economic losses. Phospholipids have been found to enhance growth, survival, and health in the early stages of the fish life. This study evaluated different phospholipid sources in freshwater and observed increased weight gain with higher doses of krill meal but decreased growth with soy lecithin. Liver histology showed no major differences between different phospholipid sources, but there was a minor positive trend in gill health associated with krill meal and control diets.
Article
Biology
Michelle Y. Monette, Jonathan P. Velotta
Summary: This study investigates the physiological challenge and molecular mechanisms underlying the transition from freshwater to seawater in Atlantic salmon smolts. By combining RNA-Seq with measures of whole-animal homeostasis, the researchers found that exposure to acute stress impairs the ability of smolts to maintain osmotic/ionic balance in seawater, but increases the expression of genes related to ion transport.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Fisheries
N. H. Sissener, K. Hamre, P. G. Fjelldal, A. J. P. Philip, M. Espe, L. Miao, E. Hoglund, C. Sorensen, K. H. Skjaerven, E. Holen, S. Subramanian, V. Vikesa, B. Norberg, S. C. Remo
Summary: The loss of fish in the seawater phase of Atlantic salmon farming is high, but improvements made to the freshwater diet do not greatly affect fish growth and survival in the seawater phase. Direct transfer to seawater at a lower temperature than the fish has been acclimated to is not recommended. There were no significant differences in health- or welfare related parameters between the diet groups.
Article
Fisheries
Thomas W. K. Fraser, Tom J. Hansen, Birgitta Norberg, Tom Ole Nilsen, Ruediger W. Schulz, Per Gunnar Fjelldal
Summary: Photoperiod has an effect on the occurrence of unwanted male post-smolt maturation in large Atlantic salmon smolts. The optimal daylength for triggering smoltification without male puberty has not been determined. The study found that continuous light resulted in a higher incidence of male puberty compared to long days. It concluded that a photoperiod with a short scotophase is recommended to limit the incidence of male puberty.
Article
Fisheries
Raneesha de Fonseka, Per Gunnar Fjelldal, Florian Sambraus, Tom Ole Nilsen, Sofie C. Remo, Lars H. Stien, Helena C. Reinardy, Angelico Madaro, Tom J. Hansen, Thomas W. K. Fraser
Summary: The study found that the growth of triploid Atlantic salmon in seawater cultivation is significantly affected by salinity, but the effects depend on ploidy. In addition, there is a mismatch between triploids and diploids in smoltification biomarkers and growth.
Article
Fisheries
Petri Karppinen, Mikko Hynninen, Teppo Vehanen, Juha-Pekka Vaha
Summary: The study investigated migration behavior, route selection, and mortality of Atlantic salmon smolts in four hydroelectric facilities in the River Mustionjoki, Finland. Findings indicated a general downstream movement tendency of smolts, but variable behavior and mortality rates were observed due to diverse conditions at each power station. Essential information on behavior and mortality in relation to local conditions at each power station was provided for successful application of fish bypass systems in a salmon restoration project.
FISHERIES MANAGEMENT AND ECOLOGY
(2021)
Article
Fisheries
Antony J. Prabhu Philip, Per Gunnar Fjelldal, Sofie C. Remo, Chandrasekar Selvam, Kristin Hamre, Marit Espe, Elisabeth Holen, Kaja H. Skjaerven, Vibeke Viksa, Saravanan Subramanian, Johan W. Schrama, Nini H. Sissener
Summary: The study showed that modulating the electrolyte and/or mineral balance in freshwater feeds can pre-adapt mineral metabolism and intestinal response to seawater transfer in Atlantic salmon. Additionally, the dietary electrolyte balance did not affect the long term development of cataract or vertebral deformities.
Article
Fisheries
Brady K. Quinn, Marc Trudel, Brent M. Wilson, Jonathan Carr, Jason Daniels, Susan Haigh, David C. Hardie, James P. Hawkes, Christopher W. McKindsey, Mitchell O'Flaherty-Sproul, Emilie Simard, Fred Page
Summary: This study used a biophysical model coupled with a water circulation model to simulate the dispersal of Atlantic salmon post-smolts in Passamaquoddy Bay. Different behaviors and swimming speeds were tested, and some behaviors were found to allow salmon to successfully leave the bay and match observation data reasonably well.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Engineering, Marine
Katharine B. Miller, Courtney M. Weiss
Summary: Migration phenology plays a significant role in ecological processes, particularly for Pacific salmon. Understanding how variations in phenology change with environmental heterogeneity is crucial, especially for high-latitude rivers where climate change is occurring rapidly. This research examines the influence of river conditions on the migration phenology of Chinook, chum, and coho salmon in the Yukon River, identifying species-specific differences and their implications for survival.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Review
Oceanography
Skip McKinnell, James R. Irvine
Summary: The study investigated the relationship between ocean indicators and survival rates of certain salmon species, as well as the potential role of primary productivity phenology in explaining variations in marine survival rates. The findings suggested possible correlations but were inconclusive, highlighting the need for further research in this area.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Fisheries
Signe Dille Lovmo, Henrik Sundh, Paul Whatmore, Malene Fosse Nordvi, Trygve Sigholt, Angelico Madaro, Tora Bardal, Rolf Erik Olsen
Summary: The study found that feeding Atlantic salmon a high EPA diet improved intestinal health, while low HUFA fed fish had lower energy utilization. Chronic stress led to intestinal barrier damage and inflammation.