Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen
Sakhalin taimen Parahucho perryi, an east Asian fish noted to be one of the largest salmonids in the world, is threatened throughout its range in northern Japan and neighboring Russian Federation. We report here on the first effort to enumerate and characterize the spawning run of a river population...
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ftdoajarticles:oai:doaj.org/article:6dc49955b6af4895b72ccd31271f8e48 2023-05-15T18:08:52+02:00 Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen Peter S. Rand Michio Fukushima 2014-12-01T00:00:00Z https://doi.org/10.1016/j.gecco.2014.09.007 https://doaj.org/article/6dc49955b6af4895b72ccd31271f8e48 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2351989414000432 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2014.09.007 https://doaj.org/article/6dc49955b6af4895b72ccd31271f8e48 Global Ecology and Conservation, Vol 2, Iss , Pp 214-225 (2014) Ecology QH540-549.5 article 2014 ftdoajarticles https://doi.org/10.1016/j.gecco.2014.09.007 2023-01-08T01:32:51Z Sakhalin taimen Parahucho perryi, an east Asian fish noted to be one of the largest salmonids in the world, is threatened throughout its range in northern Japan and neighboring Russian Federation. We report here on the first effort to enumerate and characterize the spawning run of a river population. We applied sonar and video methods in a tributary of the Sarufutsu River in Hokkaido, Japan, and evaluated environmental controls on migration. Over two years we estimated the tributary population to range from 335 to 425. We found passage rate by our site to increase with temperature and decrease with river discharge, and migratory cues were reinforced by strong diel fluctuations in environmental conditions. Finally, we report evidence of males arriving early to the spawning grounds in this species. Given our results and data on the recreational fishery, we conclude that a substantial number of individuals in the population are affected by angling, underscoring the need to establish fishing regulations. Further, our study indicates passage success can vary over the migration period, and efforts at modifying or removing impediments, and devoting more research to factors controlling passage, could ultimately improve the status of this species. Keywords: Sakhalin taimen, Japan, Population size, Migration, Population status, Sonar Article in Journal/Newspaper Sakhalin Directory of Open Access Journals: DOAJ Articles Global Ecology and Conservation 2 214 225 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 |
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Ecology QH540-549.5 Peter S. Rand Michio Fukushima Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen |
topic_facet |
Ecology QH540-549.5 |
description |
Sakhalin taimen Parahucho perryi, an east Asian fish noted to be one of the largest salmonids in the world, is threatened throughout its range in northern Japan and neighboring Russian Federation. We report here on the first effort to enumerate and characterize the spawning run of a river population. We applied sonar and video methods in a tributary of the Sarufutsu River in Hokkaido, Japan, and evaluated environmental controls on migration. Over two years we estimated the tributary population to range from 335 to 425. We found passage rate by our site to increase with temperature and decrease with river discharge, and migratory cues were reinforced by strong diel fluctuations in environmental conditions. Finally, we report evidence of males arriving early to the spawning grounds in this species. Given our results and data on the recreational fishery, we conclude that a substantial number of individuals in the population are affected by angling, underscoring the need to establish fishing regulations. Further, our study indicates passage success can vary over the migration period, and efforts at modifying or removing impediments, and devoting more research to factors controlling passage, could ultimately improve the status of this species. Keywords: Sakhalin taimen, Japan, Population size, Migration, Population status, Sonar |
format |
Article in Journal/Newspaper |
author |
Peter S. Rand Michio Fukushima |
author_facet |
Peter S. Rand Michio Fukushima |
author_sort |
Peter S. Rand |
title |
Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen |
title_short |
Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen |
title_full |
Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen |
title_fullStr |
Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen |
title_full_unstemmed |
Estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered Asian salmonid, Sakhalin taimen |
title_sort |
estimating the size of the spawning population and evaluating environmental controls on migration for a critically endangered asian salmonid, sakhalin taimen |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://doi.org/10.1016/j.gecco.2014.09.007 https://doaj.org/article/6dc49955b6af4895b72ccd31271f8e48 |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
Global Ecology and Conservation, Vol 2, Iss , Pp 214-225 (2014) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2351989414000432 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2014.09.007 https://doaj.org/article/6dc49955b6af4895b72ccd31271f8e48 |
op_doi |
https://doi.org/10.1016/j.gecco.2014.09.007 |
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Global Ecology and Conservation |
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2 |
container_start_page |
214 |
op_container_end_page |
225 |
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1766181218631548928 |