Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido
Nomoto K, Omiya H, Sugimoto T, Akiba K, Edo K, Higashi S. Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido. Ecology of Freshwater Fish 2010: 19: 116–126. © 2009 John Wiley & Sons A/S Abstract...
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Online Access: | http://dx.doi.org/10.1111/j.1600-0633.2009.00396.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2009.00396.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2009.00396.x |
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crwiley:10.1111/j.1600-0633.2009.00396.x 2024-03-31T07:55:11+00:00 Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido Nomoto, K. Omiya, H. Sugimoto, T. Akiba, K. Edo, K. Higashi, S. 2010 http://dx.doi.org/10.1111/j.1600-0633.2009.00396.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2009.00396.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2009.00396.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 19, issue 1, page 116-126 ISSN 0906-6691 1600-0633 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2010 crwiley https://doi.org/10.1111/j.1600-0633.2009.00396.x 2024-03-04T13:02:00Z Nomoto K, Omiya H, Sugimoto T, Akiba K, Edo K, Higashi S. Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido. Ecology of Freshwater Fish 2010: 19: 116–126. © 2009 John Wiley & Sons A/S Abstract – Sakhalin taimen ( Hucho perryi ) populations have decreased in Hokkaido, northernmost Japan, primarily because of overexploitation and habitat degradation. Here we document another threat to this species, that of spawning redd superimposition by artificially introduced rainbow trout ( Oncorhynchus mykiss ). Sakhalin taimen and rainbow trout are the only spring‐spawning salmonid species in Hokkaido. In 2006–2008, spawning activities of both these species were observed in a Hokkaido stream, and it was determined that their spawning periods overlapped during mid‐late April. They also spawned at similar water velocities, depths and substrate compositions. Although female Sakhalin taimen were larger than female rainbow trout, their egg burial depths were nearly identical. During the observation period, rainbow trout redds were approximately five times more abundant than Sakhalin taimen redds, and about 30% of the observed Sakhalin taimen redds were superimposed by rainbow trout redds. The high degree of spatial and temporal overlap in spawning, the similar egg burial depths of both species, and the high proportion of superimposed redds suggest that the introduced rainbow trout impact the endangered Sakhalin taimen in Hokkaido, and possibly, in other areas where the two species occur together. Article in Journal/Newspaper Sakhalin Wiley Online Library Ecology of Freshwater Fish 19 1 116 126 |
institution |
Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Nomoto, K. Omiya, H. Sugimoto, T. Akiba, K. Edo, K. Higashi, S. Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Nomoto K, Omiya H, Sugimoto T, Akiba K, Edo K, Higashi S. Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido. Ecology of Freshwater Fish 2010: 19: 116–126. © 2009 John Wiley & Sons A/S Abstract – Sakhalin taimen ( Hucho perryi ) populations have decreased in Hokkaido, northernmost Japan, primarily because of overexploitation and habitat degradation. Here we document another threat to this species, that of spawning redd superimposition by artificially introduced rainbow trout ( Oncorhynchus mykiss ). Sakhalin taimen and rainbow trout are the only spring‐spawning salmonid species in Hokkaido. In 2006–2008, spawning activities of both these species were observed in a Hokkaido stream, and it was determined that their spawning periods overlapped during mid‐late April. They also spawned at similar water velocities, depths and substrate compositions. Although female Sakhalin taimen were larger than female rainbow trout, their egg burial depths were nearly identical. During the observation period, rainbow trout redds were approximately five times more abundant than Sakhalin taimen redds, and about 30% of the observed Sakhalin taimen redds were superimposed by rainbow trout redds. The high degree of spatial and temporal overlap in spawning, the similar egg burial depths of both species, and the high proportion of superimposed redds suggest that the introduced rainbow trout impact the endangered Sakhalin taimen in Hokkaido, and possibly, in other areas where the two species occur together. |
format |
Article in Journal/Newspaper |
author |
Nomoto, K. Omiya, H. Sugimoto, T. Akiba, K. Edo, K. Higashi, S. |
author_facet |
Nomoto, K. Omiya, H. Sugimoto, T. Akiba, K. Edo, K. Higashi, S. |
author_sort |
Nomoto, K. |
title |
Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido |
title_short |
Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido |
title_full |
Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido |
title_fullStr |
Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido |
title_full_unstemmed |
Potential negative impacts of introduced rainbow trout on endangered Sakhalin taimen through redd disturbance in an agricultural stream, eastern Hokkaido |
title_sort |
potential negative impacts of introduced rainbow trout on endangered sakhalin taimen through redd disturbance in an agricultural stream, eastern hokkaido |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1600-0633.2009.00396.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2009.00396.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2009.00396.x |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
Ecology of Freshwater Fish volume 19, issue 1, page 116-126 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-0633.2009.00396.x |
container_title |
Ecology of Freshwater Fish |
container_volume |
19 |
container_issue |
1 |
container_start_page |
116 |
op_container_end_page |
126 |
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1795036718812889088 |