Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry
An artificial incubation method employing filtered river water and a gravel substrate was compared with natural propagation in a test on pink (Oncorhynchus gorbuscha) and chum (O. keta) salmon, at Hooknose Creek, King Island, B.C. At time of migration, about 70% of the hatchery pink fry were similar...
Published in: | Journal of the Fisheries Research Board of Canada |
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Language: | English |
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Canadian Science Publishing
1970
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Online Access: | http://dx.doi.org/10.1139/f70-167 http://www.nrcresearchpress.com/doi/pdf/10.1139/f70-167 |
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crcansciencepubl:10.1139/f70-167 2024-04-07T07:55:12+00:00 Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry Bams, R. A. 1970 http://dx.doi.org/10.1139/f70-167 http://www.nrcresearchpress.com/doi/pdf/10.1139/f70-167 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 27, issue 8, page 1429-1452 ISSN 0015-296X journal-article 1970 crcansciencepubl https://doi.org/10.1139/f70-167 2024-03-08T00:37:45Z An artificial incubation method employing filtered river water and a gravel substrate was compared with natural propagation in a test on pink (Oncorhynchus gorbuscha) and chum (O. keta) salmon, at Hooknose Creek, King Island, B.C. At time of migration, about 70% of the hatchery pink fry were similar to the wild fry in stage of development; the remainder were immature. A similar but less pronounced difference occurred in the chum. Average rates of development were the same in the hatchery and the creek for each species. These two phenomena combined resulted in the hatchery fry of both species migrating, on the average, from 1 to 2 weeks earlier than the wild fry.Growth during incubation was the same in hatchery and creek, i.e., no loss of potential size occurred in this hatchery environment. Survivals in the hatchery were higher than in the creek, but were less than expected on the basis of experiments carried out elsewhere. Hatchery pink fry showed a lower variability in mean lengths and weights than did creek fry, possibly in response to greater homogeneity of the incubational environment. Chum fry from the last part of the creek runs showed evidence of postemergent growth in fresh water. Article in Journal/Newspaper Oncorhynchus gorbuscha Canadian Science Publishing Keta ENVELOPE(-19.455,-19.455,65.656,65.656) King Island ENVELOPE(-58.100,-58.100,-62.000,-62.000) Journal of the Fisheries Research Board of Canada 27 8 1429 1452 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
An artificial incubation method employing filtered river water and a gravel substrate was compared with natural propagation in a test on pink (Oncorhynchus gorbuscha) and chum (O. keta) salmon, at Hooknose Creek, King Island, B.C. At time of migration, about 70% of the hatchery pink fry were similar to the wild fry in stage of development; the remainder were immature. A similar but less pronounced difference occurred in the chum. Average rates of development were the same in the hatchery and the creek for each species. These two phenomena combined resulted in the hatchery fry of both species migrating, on the average, from 1 to 2 weeks earlier than the wild fry.Growth during incubation was the same in hatchery and creek, i.e., no loss of potential size occurred in this hatchery environment. Survivals in the hatchery were higher than in the creek, but were less than expected on the basis of experiments carried out elsewhere. Hatchery pink fry showed a lower variability in mean lengths and weights than did creek fry, possibly in response to greater homogeneity of the incubational environment. Chum fry from the last part of the creek runs showed evidence of postemergent growth in fresh water. |
format |
Article in Journal/Newspaper |
author |
Bams, R. A. |
spellingShingle |
Bams, R. A. Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry |
author_facet |
Bams, R. A. |
author_sort |
Bams, R. A. |
title |
Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry |
title_short |
Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry |
title_full |
Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry |
title_fullStr |
Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry |
title_full_unstemmed |
Evaluation of a Revised Hatchery Method Tested on Pink and Chum Salmon Fry |
title_sort |
evaluation of a revised hatchery method tested on pink and chum salmon fry |
publisher |
Canadian Science Publishing |
publishDate |
1970 |
url |
http://dx.doi.org/10.1139/f70-167 http://www.nrcresearchpress.com/doi/pdf/10.1139/f70-167 |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-58.100,-58.100,-62.000,-62.000) |
geographic |
Keta King Island |
geographic_facet |
Keta King Island |
genre |
Oncorhynchus gorbuscha |
genre_facet |
Oncorhynchus gorbuscha |
op_source |
Journal of the Fisheries Research Board of Canada volume 27, issue 8, page 1429-1452 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f70-167 |
container_title |
Journal of the Fisheries Research Board of Canada |
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27 |
container_issue |
8 |
container_start_page |
1429 |
op_container_end_page |
1452 |
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1795672209152278528 |