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Effect of Salinity, Photoperiod, Temperature, and Restricted Food Intake on Growth and Incidence of Sexual Maturation of Labrador Arctic charr (Salvelinus alpinus)

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dc.contributor.author MacPherson, Margaret Jeanette
dc.date.accessioned 2012-09-17T13:45:50Z
dc.date.available 2012-09-17T13:45:50Z
dc.date.issued 2012-09-17
dc.identifier.uri http://hdl.handle.net/10222/15524
dc.description.abstract Economic viability of Fraser River, Labrador Arctic charr (Salvelinus alpinus) aquaculture in Atlantic Canada may be greatly improved if grow-out could be completed in seawater (30 ppt), while having a low incidence of sexual maturation before harvesting. Growth and survival in seawater was investigated among individually PIT-tagged Arctic charr reared in tanks in the laboratory. Direct transfer from freshwater to brackish water (20 ppt), and then acclimation to 30 ppt was successful. The manipulation of photoperiod, temperature, and food ration can be used as practical applications in aquaculture to arrest maturation; this was investigated in two additional experiments. The most effective photoperiod was LD18:6 for 6 weeks starting December 21, which reduced maturation to 43% compared to 78% in controls. Restricted ration from December 21 through March 15 had no effect on maturation, however, rearing females in 5°C compared to 10°C reduced maturation to 15% compared to >80% in controls. en_US
dc.language.iso en en_US
dc.subject Salvelinus alpinus en_US
dc.subject Photoperiod en_US
dc.subject Sexual Maturation en_US
dc.subject Acclimation en_US
dc.subject Temperature en_US
dc.subject Salinity en_US
dc.title Effect of Salinity, Photoperiod, Temperature, and Restricted Food Intake on Growth and Incidence of Sexual Maturation of Labrador Arctic charr (Salvelinus alpinus) en_US
dc.date.defence 2012-08-15
dc.contributor.department Nova Scotia Agricultural College en_US
dc.contributor.degree Master of Science en_US
dc.contributor.external-examiner Dr. Tillman Benfey en_US
dc.contributor.graduate-coordinator Dr. Dian Patterson en_US
dc.contributor.thesis-reader Dr. Derek Anderson en_US
dc.contributor.thesis-supervisor Dr. Jim Duston, Dr. Tess Astatkie en_US
dc.contributor.ethics-approval Not Applicable en_US
dc.contributor.manuscripts Not Applicable en_US
dc.contributor.copyright-release Not Applicable en_US


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