Survival and Production of Pink and Chum Salmon in a Coastal Stream
A study of the propagation of pink and chum salmon in the central coastal region of British Columbia was made for the years 1947 to 1956.Timing, distribution and movement of the adults and fry are discussed. The effects of temperature, stream discharge, sex ratio and population density were consider...
Published in: | Journal of the Fisheries Research Board of Canada |
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Language: | English |
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Canadian Science Publishing
1959
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Online Access: | http://dx.doi.org/10.1139/f59-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/f59-061 |
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crcansciencepubl:10.1139/f59-061 2023-12-17T10:48:47+01:00 Survival and Production of Pink and Chum Salmon in a Coastal Stream Hunter, J. G. 1959 http://dx.doi.org/10.1139/f59-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/f59-061 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 16, issue 6, page 835-886 ISSN 0015-296X General Medicine journal-article 1959 crcansciencepubl https://doi.org/10.1139/f59-061 2023-11-19T13:38:37Z A study of the propagation of pink and chum salmon in the central coastal region of British Columbia was made for the years 1947 to 1956.Timing, distribution and movement of the adults and fry are discussed. The effects of temperature, stream discharge, sex ratio and population density were considered in relation to survival of egg to fry. Within the limits observed, temperature, stream discharge and sex ratio were not affecting the population perceptibly, but population density was an important factor. The density of spawners in preceding years also affected the survival in subsequent years.Predation was an important factor in keeping the fry output low: the number of fry consumed was approximately 500,000 during each migration.Ocean survival, including the effect of fishing mortality, ranged from 5.2% down to 0.7% for pink salmon, and from 2.6% to 0.85% for chum salmon. Ocean survival for pink salmon before fishing mortality occurred ranged from 10.8% down to 1.0%.Combination of freshwater and ocean survival rates indicate that a variation up to 190 times the lowest rate recorded is possible. Article in Journal/Newspaper Pink salmon Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 16 6 835 886 |
institution |
Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
spellingShingle |
General Medicine Hunter, J. G. Survival and Production of Pink and Chum Salmon in a Coastal Stream |
topic_facet |
General Medicine |
description |
A study of the propagation of pink and chum salmon in the central coastal region of British Columbia was made for the years 1947 to 1956.Timing, distribution and movement of the adults and fry are discussed. The effects of temperature, stream discharge, sex ratio and population density were considered in relation to survival of egg to fry. Within the limits observed, temperature, stream discharge and sex ratio were not affecting the population perceptibly, but population density was an important factor. The density of spawners in preceding years also affected the survival in subsequent years.Predation was an important factor in keeping the fry output low: the number of fry consumed was approximately 500,000 during each migration.Ocean survival, including the effect of fishing mortality, ranged from 5.2% down to 0.7% for pink salmon, and from 2.6% to 0.85% for chum salmon. Ocean survival for pink salmon before fishing mortality occurred ranged from 10.8% down to 1.0%.Combination of freshwater and ocean survival rates indicate that a variation up to 190 times the lowest rate recorded is possible. |
format |
Article in Journal/Newspaper |
author |
Hunter, J. G. |
author_facet |
Hunter, J. G. |
author_sort |
Hunter, J. G. |
title |
Survival and Production of Pink and Chum Salmon in a Coastal Stream |
title_short |
Survival and Production of Pink and Chum Salmon in a Coastal Stream |
title_full |
Survival and Production of Pink and Chum Salmon in a Coastal Stream |
title_fullStr |
Survival and Production of Pink and Chum Salmon in a Coastal Stream |
title_full_unstemmed |
Survival and Production of Pink and Chum Salmon in a Coastal Stream |
title_sort |
survival and production of pink and chum salmon in a coastal stream |
publisher |
Canadian Science Publishing |
publishDate |
1959 |
url |
http://dx.doi.org/10.1139/f59-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/f59-061 |
genre |
Pink salmon |
genre_facet |
Pink salmon |
op_source |
Journal of the Fisheries Research Board of Canada volume 16, issue 6, page 835-886 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f59-061 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
16 |
container_issue |
6 |
container_start_page |
835 |
op_container_end_page |
886 |
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1785573045371404288 |