Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables
We used information about hatchery rearing and release practices for 173 releases of age 0+ smolts between 1982 and 2012, as well as time series of early marine prey biomass and predator abundance/biomass, to investigate the biological basis of age-specific return variability of chinook salmon ( Onc...
Published in: | The Open Fish Science Journal |
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Language: | English |
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Bentham Science Publishers Ltd.
2016
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Online Access: | http://dx.doi.org/10.2174/1874401x01609010015 https://openfishsciencejournal.com/contents/volumes/V9/TOFISHSJ-9-15/TOFISHSJ-9-15.pdf https://openfishsciencejournal.com/contents/volumes/V9/TOFISHSJ-9-15/TOFISHSJ-9-15.xml |
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crbenthamsciepub:10.2174/1874401x01609010015 2024-04-07T07:46:01+00:00 Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables Tanasichuk, R. W. Emmonds, S. 2016 http://dx.doi.org/10.2174/1874401x01609010015 https://openfishsciencejournal.com/contents/volumes/V9/TOFISHSJ-9-15/TOFISHSJ-9-15.pdf https://openfishsciencejournal.com/contents/volumes/V9/TOFISHSJ-9-15/TOFISHSJ-9-15.xml en eng Bentham Science Publishers Ltd. https://creativecommons.org/licenses/by-nc/4.0/legalcode The Open Fish Science Journal volume 9, issue 1, page 15-25 ISSN 1874-401X journal-article 2016 crbenthamsciepub https://doi.org/10.2174/1874401x01609010015 2024-03-08T00:26:23Z We used information about hatchery rearing and release practices for 173 releases of age 0+ smolts between 1982 and 2012, as well as time series of early marine prey biomass and predator abundance/biomass, to investigate the biological basis of age-specific return variability of chinook salmon ( Oncorhynchus tshawytscha ) from the Robertson Creek Hatchery. We used survival rate as the response variable and considered the rate to be an apparent one because it is the product of the survival and maturation rates. Results of multiple regression analyses (adjusted R 2 ranging between 0.43 and 0.59) showed that Pacific mackerel ( Scomber japonicus ) and Steller sea lion ( Eumetopias jubatus ) abundances accounted consistently for all of the explained variation in age-specific survival rate. We suggest that the persistence of the early marine (predation) effect with age shows that there is no effect of hatchery practice on age at maturity. Apparent survival rate variation was not explained when we used conventional physical oceanographic measurements (temperature, salinity, Pacific Decadal Oscillation Index, Northern Oscillation Index, Arctic Oscillation Index, Aleutian Low Pressure Index, Bakun Upwelling Index, timing of spring transition) in our analyses. Article in Journal/Newspaper aleutian low Arctic Bentham Science Publishers Arctic Pacific Robertson Creek ENVELOPE(-122.653,-122.653,56.833,56.833) The Open Fish Science Journal 9 1 15 25 |
institution |
Open Polar |
collection |
Bentham Science Publishers |
op_collection_id |
crbenthamsciepub |
language |
English |
description |
We used information about hatchery rearing and release practices for 173 releases of age 0+ smolts between 1982 and 2012, as well as time series of early marine prey biomass and predator abundance/biomass, to investigate the biological basis of age-specific return variability of chinook salmon ( Oncorhynchus tshawytscha ) from the Robertson Creek Hatchery. We used survival rate as the response variable and considered the rate to be an apparent one because it is the product of the survival and maturation rates. Results of multiple regression analyses (adjusted R 2 ranging between 0.43 and 0.59) showed that Pacific mackerel ( Scomber japonicus ) and Steller sea lion ( Eumetopias jubatus ) abundances accounted consistently for all of the explained variation in age-specific survival rate. We suggest that the persistence of the early marine (predation) effect with age shows that there is no effect of hatchery practice on age at maturity. Apparent survival rate variation was not explained when we used conventional physical oceanographic measurements (temperature, salinity, Pacific Decadal Oscillation Index, Northern Oscillation Index, Arctic Oscillation Index, Aleutian Low Pressure Index, Bakun Upwelling Index, timing of spring transition) in our analyses. |
format |
Article in Journal/Newspaper |
author |
Tanasichuk, R. W. Emmonds, S. |
spellingShingle |
Tanasichuk, R. W. Emmonds, S. Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables |
author_facet |
Tanasichuk, R. W. Emmonds, S. |
author_sort |
Tanasichuk, R. W. |
title |
Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables |
title_short |
Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables |
title_full |
Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables |
title_fullStr |
Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables |
title_full_unstemmed |
Exploring the Biological Basis of Age-Specific Return Variability of Chinook Salmon (Oncorhynchus tshawytscha) From the Robertson Creek Hatchery, British Columbia Using Biological or Physical Oceanographic Explanatory Variables |
title_sort |
exploring the biological basis of age-specific return variability of chinook salmon (oncorhynchus tshawytscha) from the robertson creek hatchery, british columbia using biological or physical oceanographic explanatory variables |
publisher |
Bentham Science Publishers Ltd. |
publishDate |
2016 |
url |
http://dx.doi.org/10.2174/1874401x01609010015 https://openfishsciencejournal.com/contents/volumes/V9/TOFISHSJ-9-15/TOFISHSJ-9-15.pdf https://openfishsciencejournal.com/contents/volumes/V9/TOFISHSJ-9-15/TOFISHSJ-9-15.xml |
long_lat |
ENVELOPE(-122.653,-122.653,56.833,56.833) |
geographic |
Arctic Pacific Robertson Creek |
geographic_facet |
Arctic Pacific Robertson Creek |
genre |
aleutian low Arctic |
genre_facet |
aleutian low Arctic |
op_source |
The Open Fish Science Journal volume 9, issue 1, page 15-25 ISSN 1874-401X |
op_rights |
https://creativecommons.org/licenses/by-nc/4.0/legalcode |
op_doi |
https://doi.org/10.2174/1874401x01609010015 |
container_title |
The Open Fish Science Journal |
container_volume |
9 |
container_issue |
1 |
container_start_page |
15 |
op_container_end_page |
25 |
_version_ |
1795662133714747392 |