Serial sampling reveals temperature associated response in transcription profiles and shifts in condition and infectious agent communities in wild Atlantic salmon

2021 ◽  
Author(s):  
Jacqueline M. Chapman ◽  
Robert J. Lennox ◽  
William M. Twardek ◽  
Amy K. Teffer ◽  
Martha J. Robertson ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Infectious Agent ◽  
Transcription Profiles ◽  
Serial Sampling ◽  
And Shifts

Long-term declines in body size and shifts in run timing of Atlantic salmon in Ireland

2006 ◽  
Vol 68 (6) ◽  
pp. 1713-1730 ◽  
Author(s):  
T. P. Quinn ◽  
P. McGinnity ◽  
T. F. Cross
Keyword(s):  
Body Size ◽  
Atlantic Salmon ◽  
And Shifts ◽  
Run Timing

scholarly journals An extensive common‐garden study with domesticated and wild Atlantic salmon in the wild reveals impact on smolt production and shifts in fitness traits

2019 ◽  
Vol 12 (5) ◽  
pp. 1001-1016 ◽  
Author(s):  
Øystein Skaala ◽  
Francois Besnier ◽  
Reidar Borgstrøm ◽  
BjørnTorgeir Barlaup ◽  
Anne Grete Sørvik ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Common Garden ◽  
Fitness Traits ◽  
In The Wild ◽  
And Shifts

Salmon gill poxvirus, a recently characterized infectious agent of multifactorial gill disease in freshwater- and seawater-reared Atlantic salmon

2017 ◽  
Vol 40 (10) ◽  
pp. 1253-1265 ◽  
Author(s):  
M C Gjessing ◽  
E Thoen ◽  
T Tengs ◽  
S A Skotheim ◽  
O B Dale
Keyword(s):  
Atlantic Salmon ◽  
Infectious Agent ◽  
Gill Disease

scholarly journals Handling, infectious agents and physiological condition influence survival and post-release behaviour in migratory adult coho salmon after experimental displacement

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
J M Chapman ◽  
A K Teffer ◽  
A L Bass ◽  
S G Hinch ◽  
D A Patterson ◽  
...  
Keyword(s):  
Coho Salmon ◽  
Pacific Salmon ◽  
Radio Telemetry ◽  
Infectious Agent ◽  
Behavioural Plasticity ◽  
Infectious Agents ◽  
Air Exposure ◽  
Immune Genes ◽  
Transcription Profiles ◽  
Recreational Angling

Abstract For Pacific salmon captured and released by fisheries, post-release behaviour and survival may be influenced by their health and condition at time of capture. We sought to characterize the interactions between infectious agent burden, fish immune and stress physiology and fisheries stressors to investigate the potential for capture-mediated pathogen-induced mortality in adult coho salmon Oncorhynchus kisutch. We used radio-telemetry paired with high-throughput qPCR of non-lethal gill biopsies for infectious agents and host biomarkers from 200 tagged fish experimentally displaced and exposed to various experimental fisheries treatments (gill net entanglement, recreational angling and recreational angling with air exposure vs. non-sampled control). We characterized relationships among post-release behaviour and survival, infectious agent presence and loads, physiological parameters and transcription profiles of stress and immune genes. All infectious agents detected were endemic and in loads consistent with previous adult Pacific salmon monitoring. Individuals exposed to fisheries treatments were less likely to reach spawning habitat compared to controls, and handling duration independent of fisheries gear had a negative effect on survival. High infectious agent burden was associated with accelerated migration initiation post-release, revealing behavioural plasticity in response to deteriorating condition in this semelparous species. Prevalence and load of infectious agents increased post-migration as well as transcription signatures reflected changes in immune and stress profiles consistent with senescence. Results from this study further our understanding of factors associated with fisheries that increase risk of post-release mortality and characterize some physiological mechanisms that underpin migratory behaviour.

scholarly journals Descriptive multi-agent epidemiology via molecular screening on Atlantic salmon farms in the northeast Pacific Ocean

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrew W. Bateman ◽  
Angela D. Schulze ◽  
Karia H. Kaukinen ◽  
Amy Tabata ◽  
Gideon Mordecai ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Screening Program ◽  
Temporal Trends ◽  
Cutthroat Trout ◽  
Infectious Agent ◽  
Rapid Expansion ◽  
Transmission Risk ◽  
Farmed Salmon ◽  
Multi Agent ◽  
Dead Fish

AbstractRapid expansion of salmon aquaculture has resulted in high-density populations that host diverse infectious agents, for which surveillance and monitoring are critical to disease management. Screening can reveal infection diversity from which disease arises, differential patterns of infection in live and dead fish that are difficult to collect in wild populations, and potential risks associated with agent transmission between wild and farmed hosts. We report results from a multi-year infectious-agent screening program of farmed salmon in British Columbia, Canada, using quantitative PCR to assess presence and load of 58 infective agents (viruses, bacteria, and eukaryotes) in 2931 Atlantic salmon (Salmo salar). Our analysis reveals temporal trends, agent correlations within hosts, and agent-associated mortality signatures. Multiple agents, most notably Tenacibaculum maritimum, were elevated in dead and dying salmon. We also report detections of agents only recently shown to infect farmed salmon in BC (Atlantic salmon calicivirus, Cutthroat trout virus-2), detection in freshwater hatcheries of two marine agents (Kudoa thyrsites and Tenacibaculum maritimum), and detection in the ocean of a freshwater agent (Flavobacterium psychrophilum). Our results provide information for farm managers, regulators, and conservationists, and enable further work to explore patterns of multi-agent infection and farm/wild transmission risk.

Rapid parallel evolutionary changes of gene transcription profiles in farmed Atlantic salmon

2005 ◽  
Vol 15 (1) ◽  
pp. 9-20 ◽  
Author(s):  
CHRISTIAN ROBERGE ◽  
SIGURD EINUM ◽  
HELGA GUDERLEY ◽  
LOUIS BERNATCHEZ
Keyword(s):  
Atlantic Salmon ◽  
Gene Transcription ◽  
Transcription Profiles ◽  
Evolutionary Changes ◽  
Farmed Atlantic Salmon

scholarly journals Who acquires infection from whom and how? Disentangling multi-host and multi-mode transmission dynamics in the ‘elimination’ era

2017 ◽  
Vol 372 (1719) ◽  
pp. 20160091 ◽  
Author(s):  
Joanne P. Webster ◽  
Anna Borlase ◽  
James W. Rudge
Keyword(s):  
Disease Control ◽  
Infectious Agent ◽  
Transmission Dynamics ◽  
Relative Importance ◽  
Infectious Agents ◽  
Disease Dynamics ◽  
Modes Of Transmission ◽  
Selective Pressures ◽  
And Shifts ◽  
Multi Mode

Multi-host infectious agents challenge our abilities to understand, predict and manage disease dynamics. Within this, many infectious agents are also able to use, simultaneously or sequentially, multiple modes of transmission. Furthermore, the relative importance of different host species and modes can itself be dynamic, with potential for switches and shifts in host range and/or transmission mode in response to changing selective pressures, such as those imposed by disease control interventions. The epidemiology of such multi-host, multi-mode infectious agents thereby can involve a multi-faceted community of definitive and intermediate/secondary hosts or vectors, often together with infectious stages in the environment, all of which may represent potential targets, as well as specific challenges, particularly where disease elimination is proposed. Here, we explore, focusing on examples from both human and animal pathogen systems, why and how we should aim to disentangle and quantify the relative importance of multi-host multi-mode infectious agent transmission dynamics under contrasting conditions, and ultimately, how this can be used to help achieve efficient and effective disease control. This article is part of the themed issue ‘Opening the black box: re-examining the ecology and evolution of parasite transmission’.

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