Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes
The forage fish communities of the Laurentian Great Lakes continue to experience changes that have altered ecosystem structure, yet little is known about how they partition resources. Seasonal, spatial, and body size variation in δ 13 C and δ 15 N was used to assess isotopic niche overlap and resour...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
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Online Access: | http://dx.doi.org/10.1139/cjfas-2016-0150 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0150 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0150 |
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crcansciencepubl:10.1139/cjfas-2016-0150 2024-05-19T07:39:07+00:00 Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes Mumby, James A. Johnson, Timothy B. Stewart, Thomas J. Halfyard, Edmund A. Weidel, Brian C. Walsh, Maureen G. Lantry, Jana R. Fisk, Aaron T. 2018 http://dx.doi.org/10.1139/cjfas-2016-0150 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0150 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0150 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 5, page 759-771 ISSN 0706-652X 1205-7533 journal-article 2018 crcansciencepubl https://doi.org/10.1139/cjfas-2016-0150 2024-05-02T06:51:25Z The forage fish communities of the Laurentian Great Lakes continue to experience changes that have altered ecosystem structure, yet little is known about how they partition resources. Seasonal, spatial, and body size variation in δ 13 C and δ 15 N was used to assess isotopic niche overlap and resource and habitat partitioning among the five common offshore Lake Ontario forage fish species (n = 2037; alewife (Alosa pseudoharengus), rainbow smelt (Osmerus mordax), round goby (Neogobius melanostomus), and deepwater (Myoxocephalus thompsonii) and slimy (Cottus cognatus) sculpins). Round goby had the largest isotopic niche (6.1‰ 2 , standard ellipse area), followed by alewife (3.4‰ 2 ), while rainbow smelt, slimy sculpin, and deepwater sculpin had the smallest and similar niche size (1.7‰ 2 –1.8‰ 2 ), with only the sculpin species showing significant isotopic niche overlap (>63%). Stable isotopes in alewife, round goby, and rainbow smelt varied with location, season, and size, but did not vary in the sculpin species. Lake Ontario forage fish species have partitioned food and habitat resources, and non-native alewife and round goby have the largest isotopic niche, suggestive of a boarder ecological niche, and may contribute to their current high abundance. Article in Journal/Newspaper Cottus cognatus Slimy sculpin Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 75 5 759 771 |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The forage fish communities of the Laurentian Great Lakes continue to experience changes that have altered ecosystem structure, yet little is known about how they partition resources. Seasonal, spatial, and body size variation in δ 13 C and δ 15 N was used to assess isotopic niche overlap and resource and habitat partitioning among the five common offshore Lake Ontario forage fish species (n = 2037; alewife (Alosa pseudoharengus), rainbow smelt (Osmerus mordax), round goby (Neogobius melanostomus), and deepwater (Myoxocephalus thompsonii) and slimy (Cottus cognatus) sculpins). Round goby had the largest isotopic niche (6.1‰ 2 , standard ellipse area), followed by alewife (3.4‰ 2 ), while rainbow smelt, slimy sculpin, and deepwater sculpin had the smallest and similar niche size (1.7‰ 2 –1.8‰ 2 ), with only the sculpin species showing significant isotopic niche overlap (>63%). Stable isotopes in alewife, round goby, and rainbow smelt varied with location, season, and size, but did not vary in the sculpin species. Lake Ontario forage fish species have partitioned food and habitat resources, and non-native alewife and round goby have the largest isotopic niche, suggestive of a boarder ecological niche, and may contribute to their current high abundance. |
format |
Article in Journal/Newspaper |
author |
Mumby, James A. Johnson, Timothy B. Stewart, Thomas J. Halfyard, Edmund A. Weidel, Brian C. Walsh, Maureen G. Lantry, Jana R. Fisk, Aaron T. |
spellingShingle |
Mumby, James A. Johnson, Timothy B. Stewart, Thomas J. Halfyard, Edmund A. Weidel, Brian C. Walsh, Maureen G. Lantry, Jana R. Fisk, Aaron T. Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes |
author_facet |
Mumby, James A. Johnson, Timothy B. Stewart, Thomas J. Halfyard, Edmund A. Weidel, Brian C. Walsh, Maureen G. Lantry, Jana R. Fisk, Aaron T. |
author_sort |
Mumby, James A. |
title |
Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes |
title_short |
Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes |
title_full |
Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes |
title_fullStr |
Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes |
title_full_unstemmed |
Feeding ecology and niche overlap of Lake Ontario offshore forage fish assessed with stable isotopes |
title_sort |
feeding ecology and niche overlap of lake ontario offshore forage fish assessed with stable isotopes |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
http://dx.doi.org/10.1139/cjfas-2016-0150 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0150 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0150 |
genre |
Cottus cognatus Slimy sculpin |
genre_facet |
Cottus cognatus Slimy sculpin |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 5, page 759-771 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2016-0150 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
75 |
container_issue |
5 |
container_start_page |
759 |
op_container_end_page |
771 |
_version_ |
1799478648137318400 |