Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River
Increased growth rates for adult and young-of-the-year Arctic grayling (Thymallus arcticus) were measured after the addition of fertilizer to an oligotrophic Alaskan tundra river. The strongest response to the fertilization was seen in young-of-the-year grayling; the adult response was more variable...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1992
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Online Access: | http://dx.doi.org/10.1139/f92-209 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-209 |
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crcansciencepubl:10.1139/f92-209 2024-09-15T17:52:39+00:00 Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River Deegan, Linda A. Peterson, Bruce J. 1992 http://dx.doi.org/10.1139/f92-209 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-209 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 9, page 1890-1901 ISSN 0706-652X 1205-7533 journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-209 2024-08-15T04:09:32Z Increased growth rates for adult and young-of-the-year Arctic grayling (Thymallus arcticus) were measured after the addition of fertilizer to an oligotrophic Alaskan tundra river. The strongest response to the fertilization was seen in young-of-the-year grayling; the adult response was more variable. Whole-river phosphorus fertilization of the Kuparuk River, Alaska, during 1985–90 resulted in a 1.4- to 1.9-fold increase in the size of age 0+ fish and a 1.5- to 2.4-fold increase in the weight gain of adult grayling in some years. Neutral lipid storage in adult grayling was increased 1.3- to 3.4-fold in the fertilized zone compared with that in fish from the control zone. There was no detectable difference between the zones in gonad mass, percent lipid in eggs, or egg size. These results suggest that autochthonous production is an important energy source for fish in tundra streams and that nutrient limitation of stream ecosystems affects the highest trophic levels. These findings have importance for understanding the function of river ecosystems, for assessing human impacts on rivers, and for managing fisheries. Article in Journal/Newspaper Arctic grayling Thymallus arcticus Tundra Alaska Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 49 9 1890 1901 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Increased growth rates for adult and young-of-the-year Arctic grayling (Thymallus arcticus) were measured after the addition of fertilizer to an oligotrophic Alaskan tundra river. The strongest response to the fertilization was seen in young-of-the-year grayling; the adult response was more variable. Whole-river phosphorus fertilization of the Kuparuk River, Alaska, during 1985–90 resulted in a 1.4- to 1.9-fold increase in the size of age 0+ fish and a 1.5- to 2.4-fold increase in the weight gain of adult grayling in some years. Neutral lipid storage in adult grayling was increased 1.3- to 3.4-fold in the fertilized zone compared with that in fish from the control zone. There was no detectable difference between the zones in gonad mass, percent lipid in eggs, or egg size. These results suggest that autochthonous production is an important energy source for fish in tundra streams and that nutrient limitation of stream ecosystems affects the highest trophic levels. These findings have importance for understanding the function of river ecosystems, for assessing human impacts on rivers, and for managing fisheries. |
format |
Article in Journal/Newspaper |
author |
Deegan, Linda A. Peterson, Bruce J. |
spellingShingle |
Deegan, Linda A. Peterson, Bruce J. Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River |
author_facet |
Deegan, Linda A. Peterson, Bruce J. |
author_sort |
Deegan, Linda A. |
title |
Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River |
title_short |
Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River |
title_full |
Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River |
title_fullStr |
Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River |
title_full_unstemmed |
Whole-River Fertilization Stimulates Fish Production in an Arctic Tundra River |
title_sort |
whole-river fertilization stimulates fish production in an arctic tundra river |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-209 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-209 |
genre |
Arctic grayling Thymallus arcticus Tundra Alaska |
genre_facet |
Arctic grayling Thymallus arcticus Tundra Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 9, page 1890-1901 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-209 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
49 |
container_issue |
9 |
container_start_page |
1890 |
op_container_end_page |
1901 |
_version_ |
1810294700794445824 |