scholarly journals Chemical composition and release rate of waste discharge from an Atlantic salmon farm with an evaluation of IMTA feasibility

2013 ◽  
Vol 4 (2) ◽  
pp. 147-162 ◽  
Author(s):  
X Wang ◽  
K Andresen ◽  
A Handå ◽  
B Jensen ◽  
KI Reitan ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Atlantic Salmon ◽  
Release Rate ◽  
Salmon Farm ◽  
Waste Discharge

WASTE LOADINGS FROM A FRESHWATER ATLANTIC SALMON FARM IN SCOTLAND

1996 ◽  
Vol 32 (5) ◽  
pp. 1017-1025 ◽  
Author(s):  
L. A. Kelly ◽  
J. Stellwagen ◽  
A. Bergheim
Keyword(s):  
Atlantic Salmon ◽  
Salmon Farm

An Improved Extender for Freezing Atlantic Salmon Spermatozoa

1969 ◽  
Vol 26 (12) ◽  
pp. 3254-3258 ◽  
Author(s):  
B. Truscott ◽  
D. R. Idler
Keyword(s):  
Chemical Composition ◽  
Atlantic Salmon ◽  
Propylene Glycol ◽  
Seminal Plasma ◽  
Dimethyl Sulphoxide ◽  
Sperm Cells ◽  
Freeze Thaw ◽  
Simultaneous Addition ◽  
Further Development

A solution of chemical composition based on that of seminal plasma was an effective extender for Atlantic salmon spermatozoa; semen diluted to 20 volumes could be maintained at 4 C in an inactive but potentially motile condition for several days. Propylene glycol at concentrations between 7.0 and 12.5% protected sperm cells against freeze–thaw damage. The addition of glycine or albumin to the basic extender containing 7–12.5% propylene glycol or 10% dimethyl sulphoxide provided an extender meriting further development for the cryopreservation of salmonid spermatozoa. Fertilities of 5–19% were achieved with 10 frozen sperm samples diluted with such extenders. For frozen samples a method of fertilization with simultaneous addition of water and sperm to the eggs is proposed.

scholarly journals Environmental DNA from multiple pathogens is elevated near active Atlantic salmon farms

2020 ◽  
Vol 287 (1937) ◽  
pp. 20202010
Author(s):  
Dylan Shea ◽  
Andrew Bateman ◽  
Shaorong Li ◽  
Amy Tabata ◽  
Angela Schulze ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Extinction Risk ◽  
Environmental Dna ◽  
Reservoir Host ◽  
Standard Deviation Increase ◽  
Salmon Farm ◽  
Potential Reservoir ◽  
Spread Of Infection ◽  
A Site ◽  
Multiple Pathogens

The spread of infection from reservoir host populations is a key mechanism for disease emergence and extinction risk and is a management concern for salmon aquaculture and fisheries. Using a quantitative environmental DNA methodology, we assessed pathogen environmental DNA in relation to salmon farms in coastal British Columbia, Canada, by testing for 39 species of salmon pathogens (viral, bacterial, and eukaryotic) in 134 marine environmental samples at 58 salmon farm sites (both active and inactive) over 3 years. Environmental DNA from 22 pathogen species was detected 496 times and species varied in their occurrence among years and sites, likely reflecting variation in environmental factors, other native host species, and strength of association with domesticated Atlantic salmon. Overall, we found that the probability of detecting pathogen environmental DNA (eDNA) was 2.72 (95% CI: 1.48, 5.02) times higher at active versus inactive salmon farm sites and 1.76 (95% CI: 1.28, 2.42) times higher per standard deviation increase in domesticated Atlantic salmon eDNA concentration at a site. If the distribution of pathogen eDNA accurately reflects the distribution of viable pathogens, our findings suggest that salmon farms serve as a potential reservoir for a number of infectious agents; thereby elevating the risk of exposure for wild salmon and other fish species that share the marine environment.

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