Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year
There is increasing interest in defining optimal conditions for rearing salmon to market size in recirculating aquaculture systems (RAS). Salinity, however, as a parameter that can be potentially manipulated, has been poorly studied. To address this knowledge gap, we reared coho (Oncorhynchus kisutc...
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2021
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Online Access: | http://dx.doi.org/10.1139/cjz-2020-0288 https://cdnsciencepub.com/doi/full-xml/10.1139/cjz-2020-0288 https://cdnsciencepub.com/doi/pdf/10.1139/cjz-2020-0288 |
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crcansciencepubl:10.1139/cjz-2020-0288 2024-06-23T07:51:15+00:00 Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year Fang, Yuanchang Emerman, Joshua D. Chan, Victor K.S. Stiller, Kevin T. Brauner, Colin J. Richards, Jeffrey G. 2021 http://dx.doi.org/10.1139/cjz-2020-0288 https://cdnsciencepub.com/doi/full-xml/10.1139/cjz-2020-0288 https://cdnsciencepub.com/doi/pdf/10.1139/cjz-2020-0288 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 99, issue 11, page 984-994 ISSN 0008-4301 1480-3283 journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjz-2020-0288 2024-05-30T08:13:48Z There is increasing interest in defining optimal conditions for rearing salmon to market size in recirculating aquaculture systems (RAS). Salinity, however, as a parameter that can be potentially manipulated, has been poorly studied. To address this knowledge gap, we reared coho (Oncorhynchus kisutch (Walbaum, 1792)) and Atlantic (Salmo salar Linnaeus, 1758) salmon from smolt to market size over ∼460 days at five different salinities (0, 5, 10, 20, and 30 ppt) and examined their growth performance. We found that both species reared at intermediate salinities (5–10 ppt) started to show significantly larger body mass than fish reared either in freshwater or full-strength seawater at around days 250–300. These growth-enhancing effects were maintained until day 460. The higher growth in Atlantic salmon at intermediate salinities was associated with a reduced economic feed conversion ratio, but this was not observed in coho salmon. The all-female coho salmon showed no incidence of sexual maturation and negligible cataract formation, while the mixed-sex Atlantic salmon showed high levels of sexual maturation (up to 50%) and presence of cataracts (up to 60%). Our results indicate that all-female coho salmon may be better suited to RAS than Atlantic salmon in some aspects. However, in both species, long-term rearing at intermediate salinities improved growth in RAS. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Zoology |
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Canadian Science Publishing |
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English |
description |
There is increasing interest in defining optimal conditions for rearing salmon to market size in recirculating aquaculture systems (RAS). Salinity, however, as a parameter that can be potentially manipulated, has been poorly studied. To address this knowledge gap, we reared coho (Oncorhynchus kisutch (Walbaum, 1792)) and Atlantic (Salmo salar Linnaeus, 1758) salmon from smolt to market size over ∼460 days at five different salinities (0, 5, 10, 20, and 30 ppt) and examined their growth performance. We found that both species reared at intermediate salinities (5–10 ppt) started to show significantly larger body mass than fish reared either in freshwater or full-strength seawater at around days 250–300. These growth-enhancing effects were maintained until day 460. The higher growth in Atlantic salmon at intermediate salinities was associated with a reduced economic feed conversion ratio, but this was not observed in coho salmon. The all-female coho salmon showed no incidence of sexual maturation and negligible cataract formation, while the mixed-sex Atlantic salmon showed high levels of sexual maturation (up to 50%) and presence of cataracts (up to 60%). Our results indicate that all-female coho salmon may be better suited to RAS than Atlantic salmon in some aspects. However, in both species, long-term rearing at intermediate salinities improved growth in RAS. |
format |
Article in Journal/Newspaper |
author |
Fang, Yuanchang Emerman, Joshua D. Chan, Victor K.S. Stiller, Kevin T. Brauner, Colin J. Richards, Jeffrey G. |
spellingShingle |
Fang, Yuanchang Emerman, Joshua D. Chan, Victor K.S. Stiller, Kevin T. Brauner, Colin J. Richards, Jeffrey G. Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
author_facet |
Fang, Yuanchang Emerman, Joshua D. Chan, Victor K.S. Stiller, Kevin T. Brauner, Colin J. Richards, Jeffrey G. |
author_sort |
Fang, Yuanchang |
title |
Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
title_short |
Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
title_full |
Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
title_fullStr |
Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
title_full_unstemmed |
Growth, feed conversion, sexual maturation, and cataract formation in coho ( Oncorhynchus kisutch) and Atlantic ( Salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
title_sort |
growth, feed conversion, sexual maturation, and cataract formation in coho ( oncorhynchus kisutch) and atlantic ( salmo salar) salmon post-smolts reared at different salinities in recirculating aquaculture systems for over one year |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjz-2020-0288 https://cdnsciencepub.com/doi/full-xml/10.1139/cjz-2020-0288 https://cdnsciencepub.com/doi/pdf/10.1139/cjz-2020-0288 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Zoology volume 99, issue 11, page 984-994 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjz-2020-0288 |
container_title |
Canadian Journal of Zoology |
_version_ |
1802642287279210496 |