farm salmon
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2018 ◽  
Vol 5 (8) ◽  
pp. 180493 ◽  
Author(s):  
D. S. Murray ◽  
M. J. Kainz ◽  
L. Hebberecht ◽  
K. R. Sales ◽  
K. Hindar ◽  
...  

Triploidy could prevent escaped farm salmon breeding in the wild, while also improving nutrient quality within farmed fillets. Despite these potential advantages, triploid Atlantic salmon have not been widely used in aquaculture, and their reproductive function has yet to be fully evaluated. Here, we compare reproductive function and fillet composition between triploid and diploid farm salmon under standard aquaculture rearing conditions. We show that female triploids are sterile and do not develop gonads. By contrast, males produce large numbers of motile spermatozoa capable of fertilizing wild salmon eggs. However, compared with diploids, reproductive development and survival rates of eggs fertilized by triploid males were significantly reduced, with less than 1% of eggs sired by triploid males reaching late-eyed stages of development. Analyses of fillets showed that total lipid and fatty acid quantities were significantly lower in triploid than in diploid Atlantic salmon fillets. However, when fatty acids were normalized to total lipid content, triploid fillets had significantly higher relative levels of important omega-3 long-chain polyunsaturated fatty acids. Our results show that: (i) escaped triploid farm salmon are very unlikely to reproduce in the wild and (ii) if able to match diploid fillet lipid content, triploid farm salmon could achieve better fillet quality in terms of essential fatty acids.



2010 ◽  
Vol 107 (52) ◽  
pp. 22599-22604 ◽  
Author(s):  
G. D. Marty ◽  
S. M. Saksida ◽  
T. J. Quinn


Science ◽  
2008 ◽  
Vol 322 (5909) ◽  
pp. 1790.3-1790 ◽  
Author(s):  
Martin Krkošek ◽  
Jennifer S. Ford ◽  
Alexandra Morton ◽  
Subhash Lele ◽  
Mark A. Lewis

We evaluated the effect of sea lice (Lepeophtheirus salmonis) infestations on wild pink salmon (Oncorhynchus gorbuscha) populations in the Broughton Archipelago, British Columbia. Riddell et al. suggest that we ignored factors and selectively used data. Here, we clarify misunderstandings and provide analysis to test the strength of our conclusions.



Science ◽  
2008 ◽  
Vol 322 (5909) ◽  
pp. 1790.2-1790 ◽  
Author(s):  
Brian E. Riddell ◽  
Richard J. Beamish ◽  
Laura J. Richards ◽  
John R. Candy

Krkošek et al. (Reports, 14 December 2007, p. 1772) claimed that sea lice spread from salmon farms placed wild pink salmon populations “on a trajectory toward rapid local extinction.” Their prediction is inconsistent with observed pink salmon returns and overstates the risks from sea lice and salmon farming.



Science ◽  
2007 ◽  
Vol 318 (5857) ◽  
pp. 1772-1775 ◽  
Author(s):  
M. Krkosek ◽  
J. S. Ford ◽  
A. Morton ◽  
S. Lele ◽  
R. A. Myers ◽  
...  
Keyword(s):  


Science News ◽  
2006 ◽  
Vol 170 (21) ◽  
pp. 333-333
Keyword(s):  


Marine Policy ◽  
2004 ◽  
Vol 28 (3) ◽  
pp. 259-270 ◽  
Author(s):  
Josh Eagle ◽  
Rosamond Naylor ◽  
Whitney Smith
Keyword(s):  


2003 ◽  
Vol 270 (1532) ◽  
pp. 2443-2450 ◽  
Author(s):  
Philip McGinnity ◽  
Paulo Prodöhl ◽  
Andy Ferguson ◽  
Rosaleen Hynes ◽  
Niall ó Maoiléidigh ◽  
...  


2003 ◽  
Vol 6 (6) ◽  
pp. 541-549 ◽  
Author(s):  
Dany Garant ◽  
Ian A. Fleming ◽  
Sigurd Einum ◽  
Louis Bernatchez


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