Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation
Few fish habitat compensation projects are assessed with respect to the principle of "no net loss" of productive capacity. Using reference streams as standards against which gains and losses of functions (e.g., production of fish) could be quantified, we examined the effectiveness of a 3.4...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2003
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Online Access: | http://dx.doi.org/10.1139/f03-074 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-074 |
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crcansciencepubl:10.1139/f03-074 2024-10-13T14:04:04+00:00 Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation Jones, Nicholas E Tonn, William M Scrimgeour, Garry J Katopodis, Chris 2003 http://dx.doi.org/10.1139/f03-074 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-074 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 7, page 849-863 ISSN 0706-652X 1205-7533 journal-article 2003 crcansciencepubl https://doi.org/10.1139/f03-074 2024-09-19T04:09:49Z Few fish habitat compensation projects are assessed with respect to the principle of "no net loss" of productive capacity. Using reference streams as standards against which gains and losses of functions (e.g., production of fish) could be quantified, we examined the effectiveness of a 3.4-km artificial stream in the Northwest Territories, Canada. The artificial stream restored watershed connectivity, allowing fish migration and provided spawning and nursery habitat, particularly for Arctic grayling (Thymallus arcticus). However, the average mass of young-of-the-year (YOY) grayling at the end of summer was lower (57%) in the artificial stream than in natural streams. This difference in growth, in concert with estimates of grayling density, meant that the standing crop produced in the artificial stream averaged 37% of that found in natural streams. A bioenergetics model indicated that cooler water temperatures in the artificial stream had limited influence on growth. Instead, low amounts of autochthonous and allochthonous organic matter and poor physical habitat in the artificial stream appeared to limit the productivity of benthic invertebrates and fish. Our explicit analysis of productive capacity will allow future compensation measures to focus on deficiencies in the artificial stream and on the improvement of its productive capacity as fish habitat. Article in Journal/Newspaper Arctic grayling Arctic Northwest Territories Thymallus arcticus Canadian Science Publishing Arctic Canada Northwest Territories Canadian Journal of Fisheries and Aquatic Sciences 60 7 849 863 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Few fish habitat compensation projects are assessed with respect to the principle of "no net loss" of productive capacity. Using reference streams as standards against which gains and losses of functions (e.g., production of fish) could be quantified, we examined the effectiveness of a 3.4-km artificial stream in the Northwest Territories, Canada. The artificial stream restored watershed connectivity, allowing fish migration and provided spawning and nursery habitat, particularly for Arctic grayling (Thymallus arcticus). However, the average mass of young-of-the-year (YOY) grayling at the end of summer was lower (57%) in the artificial stream than in natural streams. This difference in growth, in concert with estimates of grayling density, meant that the standing crop produced in the artificial stream averaged 37% of that found in natural streams. A bioenergetics model indicated that cooler water temperatures in the artificial stream had limited influence on growth. Instead, low amounts of autochthonous and allochthonous organic matter and poor physical habitat in the artificial stream appeared to limit the productivity of benthic invertebrates and fish. Our explicit analysis of productive capacity will allow future compensation measures to focus on deficiencies in the artificial stream and on the improvement of its productive capacity as fish habitat. |
format |
Article in Journal/Newspaper |
author |
Jones, Nicholas E Tonn, William M Scrimgeour, Garry J Katopodis, Chris |
spellingShingle |
Jones, Nicholas E Tonn, William M Scrimgeour, Garry J Katopodis, Chris Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation |
author_facet |
Jones, Nicholas E Tonn, William M Scrimgeour, Garry J Katopodis, Chris |
author_sort |
Jones, Nicholas E |
title |
Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation |
title_short |
Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation |
title_full |
Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation |
title_fullStr |
Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation |
title_full_unstemmed |
Productive capacity of an artificial stream in the Canadian Arctic: assessing the effectiveness of fish habitat compensation |
title_sort |
productive capacity of an artificial stream in the canadian arctic: assessing the effectiveness of fish habitat compensation |
publisher |
Canadian Science Publishing |
publishDate |
2003 |
url |
http://dx.doi.org/10.1139/f03-074 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-074 |
geographic |
Arctic Canada Northwest Territories |
geographic_facet |
Arctic Canada Northwest Territories |
genre |
Arctic grayling Arctic Northwest Territories Thymallus arcticus |
genre_facet |
Arctic grayling Arctic Northwest Territories Thymallus arcticus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 7, page 849-863 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f03-074 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
60 |
container_issue |
7 |
container_start_page |
849 |
op_container_end_page |
863 |
_version_ |
1812809233091002368 |