Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns
A hatchery method designed for mass production of unfed Pacific salmon fry and utilizing a gravel medium during most of the incubation period is being evaluated on successive cycles of a stock of pink salmon, Oncorhynchus gorbuscha, of the Tsolum River, B.C. Possible treatment effects are studied at...
Published in: | Journal of the Fisheries Research Board of Canada |
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Language: | English |
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Canadian Science Publishing
1974
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Online Access: | http://dx.doi.org/10.1139/f74-163 http://www.nrcresearchpress.com/doi/pdf/10.1139/f74-163 |
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crcansciencepubl:10.1139/f74-163 2023-12-17T10:48:09+01:00 Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns Bams, Robert A. 1974 http://dx.doi.org/10.1139/f74-163 http://www.nrcresearchpress.com/doi/pdf/10.1139/f74-163 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 31, issue 8, page 1379-1385 ISSN 0015-296X General Medicine journal-article 1974 crcansciencepubl https://doi.org/10.1139/f74-163 2023-11-19T13:38:44Z A hatchery method designed for mass production of unfed Pacific salmon fry and utilizing a gravel medium during most of the incubation period is being evaluated on successive cycles of a stock of pink salmon, Oncorhynchus gorbuscha, of the Tsolum River, B.C. Possible treatment effects are studied at emergent fry and returning adult stages in artificially and naturally propagated populations. Average growth rate and, hence, efficiency of yolk conversion were unimpeded in the hatchery environment, but fry emerged 11 days prematurely. Survival from green egg to emergent fry averaged 74.9% in the hatchery and 20.6% in the creek, for a gain ratio at emergence of 3.63. Recovery of selectively marked populations of hatchery and creek fish demonstrated almost identical survival rates from fry to adult stages and a final gain ratio of 3.46. Adult lengths and weights, fecundity, and timing of migrations were unaffected generally by the hatchery treatment. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing (via Crossref) Pacific Journal of the Fisheries Research Board of Canada 31 8 1379 1385 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
spellingShingle |
General Medicine Bams, Robert A. Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns |
topic_facet |
General Medicine |
description |
A hatchery method designed for mass production of unfed Pacific salmon fry and utilizing a gravel medium during most of the incubation period is being evaluated on successive cycles of a stock of pink salmon, Oncorhynchus gorbuscha, of the Tsolum River, B.C. Possible treatment effects are studied at emergent fry and returning adult stages in artificially and naturally propagated populations. Average growth rate and, hence, efficiency of yolk conversion were unimpeded in the hatchery environment, but fry emerged 11 days prematurely. Survival from green egg to emergent fry averaged 74.9% in the hatchery and 20.6% in the creek, for a gain ratio at emergence of 3.63. Recovery of selectively marked populations of hatchery and creek fish demonstrated almost identical survival rates from fry to adult stages and a final gain ratio of 3.46. Adult lengths and weights, fecundity, and timing of migrations were unaffected generally by the hatchery treatment. |
format |
Article in Journal/Newspaper |
author |
Bams, Robert A. |
author_facet |
Bams, Robert A. |
author_sort |
Bams, Robert A. |
title |
Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns |
title_short |
Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns |
title_full |
Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns |
title_fullStr |
Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns |
title_full_unstemmed |
Gravel Incubators: a Second Evaluation on Pink Salmon, Oncorhynchus gorbuscha , Including Adult Returns |
title_sort |
gravel incubators: a second evaluation on pink salmon, oncorhynchus gorbuscha , including adult returns |
publisher |
Canadian Science Publishing |
publishDate |
1974 |
url |
http://dx.doi.org/10.1139/f74-163 http://www.nrcresearchpress.com/doi/pdf/10.1139/f74-163 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Journal of the Fisheries Research Board of Canada volume 31, issue 8, page 1379-1385 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f74-163 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
31 |
container_issue |
8 |
container_start_page |
1379 |
op_container_end_page |
1385 |
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1785572258306064384 |