Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada
Gallagher CP, Dick TA. Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada. Ecology of Freshwater Fish 2010: 19: 39–50. © 2009 John Wiley & Sons A/S Abstract – Stable isotopes, diet and parasites were used to investigate the trophic str...
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crwiley:10.1111/j.1600-0633.2009.00387.x 2023-12-03T10:16:47+01:00 Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada Gallagher, C. P. Dick, T. A. 2010 http://dx.doi.org/10.1111/j.1600-0633.2009.00387.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2009.00387.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2009.00387.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 19, issue 1, page 39-50 ISSN 0906-6691 1600-0633 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2010 crwiley https://doi.org/10.1111/j.1600-0633.2009.00387.x 2023-11-09T13:44:30Z Gallagher CP, Dick TA. Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada. Ecology of Freshwater Fish 2010: 19: 39–50. © 2009 John Wiley & Sons A/S Abstract – Stable isotopes, diet and parasites were used to investigate the trophic structure of landlocked Arctic char ( Salvelinus alpinus ) from a small Canadian Arctic lake. Two trophic levels of char were identified. The lower trophic level comprised smaller char that consumed mainly invertebrates and harboured low numbers of the cestode plerocercoid Diphyllobothrium spp. while the higher trophic level char were larger, mainly piscivorous and had high numbers of plerocercoids. Procercoids of Diphyllobothrium spp. in copepods are eaten by char where the parasite then differentiates into a plerocercoid. Plerocercoids from smaller fish are transmitted to larger fish by piscivory where they encyst again as plerocercoids until the fish is eaten by a gull. These plerocercoids are a good indicator of trophic level as their numbers accumulate over time in larger fish. The three variables together provided a better resolution of trophic structure than applied separately. For example, plerocercoid numbers plus diet were better predictors of trophic status than stable isotopes in 4–7 year olds, but for char ≥8 years all three variables were complementary. Some char (≥10 years old) were placed in the lower trophic level based on their stable isotope values and had low Diphyllobothrium spp. abundance but were piscivorous and/or cannibalistic. The absence of sexually mature char in the higher trophic group was associated with high numbers of Diphyllobothrium spp. plerocercoids. Article in Journal/Newspaper Arctic Baffin Island Baffin Salvelinus alpinus Copepods Wiley Online Library (via Crossref) Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Baffin Island Canada Ecology of Freshwater Fish 19 1 39 50 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Gallagher, C. P. Dick, T. A. Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Gallagher CP, Dick TA. Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada. Ecology of Freshwater Fish 2010: 19: 39–50. © 2009 John Wiley & Sons A/S Abstract – Stable isotopes, diet and parasites were used to investigate the trophic structure of landlocked Arctic char ( Salvelinus alpinus ) from a small Canadian Arctic lake. Two trophic levels of char were identified. The lower trophic level comprised smaller char that consumed mainly invertebrates and harboured low numbers of the cestode plerocercoid Diphyllobothrium spp. while the higher trophic level char were larger, mainly piscivorous and had high numbers of plerocercoids. Procercoids of Diphyllobothrium spp. in copepods are eaten by char where the parasite then differentiates into a plerocercoid. Plerocercoids from smaller fish are transmitted to larger fish by piscivory where they encyst again as plerocercoids until the fish is eaten by a gull. These plerocercoids are a good indicator of trophic level as their numbers accumulate over time in larger fish. The three variables together provided a better resolution of trophic structure than applied separately. For example, plerocercoid numbers plus diet were better predictors of trophic status than stable isotopes in 4–7 year olds, but for char ≥8 years all three variables were complementary. Some char (≥10 years old) were placed in the lower trophic level based on their stable isotope values and had low Diphyllobothrium spp. abundance but were piscivorous and/or cannibalistic. The absence of sexually mature char in the higher trophic group was associated with high numbers of Diphyllobothrium spp. plerocercoids. |
format |
Article in Journal/Newspaper |
author |
Gallagher, C. P. Dick, T. A. |
author_facet |
Gallagher, C. P. Dick, T. A. |
author_sort |
Gallagher, C. P. |
title |
Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada |
title_short |
Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada |
title_full |
Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada |
title_fullStr |
Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada |
title_full_unstemmed |
Trophic structure of a landlocked Arctic char Salvelinus alpinus population from southern Baffin Island, Canada |
title_sort |
trophic structure of a landlocked arctic char salvelinus alpinus population from southern baffin island, canada |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1600-0633.2009.00387.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.2009.00387.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.2009.00387.x |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) |
geographic |
Arctic Arctic Lake Baffin Island Canada |
geographic_facet |
Arctic Arctic Lake Baffin Island Canada |
genre |
Arctic Baffin Island Baffin Salvelinus alpinus Copepods |
genre_facet |
Arctic Baffin Island Baffin Salvelinus alpinus Copepods |
op_source |
Ecology of Freshwater Fish volume 19, issue 1, page 39-50 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-0633.2009.00387.x |
container_title |
Ecology of Freshwater Fish |
container_volume |
19 |
container_issue |
1 |
container_start_page |
39 |
op_container_end_page |
50 |
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1784263725467828224 |