Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada
Abstract The Gulf of St. Lawrence (GSL) is a feeding ground for several baleen whale species from the North Atlantic, providing them with an abundant supply of krill during their seasonal presence. Krill aggregations are found along the abrupt topography formed by the deep channels, but the dynamics...
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crwiley:10.1002/lno.10145 2024-06-23T07:51:34+00:00 Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada Maps, Frédéric Plourde, Stéphane McQuinn, Ian H. St‐Onge‐Drouin, Simon Lavoie, Diane Chassé, Joël Lesage, Véronique Species At Risk Program (SARCEP) and Ecosystem Research Initiative 2015 http://dx.doi.org/10.1002/lno.10145 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10145 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10145 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 60, issue 6, page 1965-1975 ISSN 0024-3590 1939-5590 journal-article 2015 crwiley https://doi.org/10.1002/lno.10145 2024-06-04T06:43:26Z Abstract The Gulf of St. Lawrence (GSL) is a feeding ground for several baleen whale species from the North Atlantic, providing them with an abundant supply of krill during their seasonal presence. Krill aggregations are found along the abrupt topography formed by the deep channels, but the dynamics of krill aggregations have not yet been characterized at the scale of the whole GSL. In this study, we combined extensive dual‐frequency acoustic observations of krill and Lagrangian numerical simulations to identify the recurrent areas of krill accumulation in summer and the mesoscale circulation mechanisms responsible for their formation. Throughout the GSL, the topographic forcing of the surface circulation appeared essential in forming convergence zones where observed krill concentrations were systematically higher than average, and within which most of the densest patches were observed. This approach can help in defining the dynamics of the feeding habitat of baleen whales in the GSL, in particular blue and fin whales whose diet is dominated by krill. Article in Journal/Newspaper baleen whale baleen whales North Atlantic Wiley Online Library Canada Limnology and Oceanography 60 6 1965 1975 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The Gulf of St. Lawrence (GSL) is a feeding ground for several baleen whale species from the North Atlantic, providing them with an abundant supply of krill during their seasonal presence. Krill aggregations are found along the abrupt topography formed by the deep channels, but the dynamics of krill aggregations have not yet been characterized at the scale of the whole GSL. In this study, we combined extensive dual‐frequency acoustic observations of krill and Lagrangian numerical simulations to identify the recurrent areas of krill accumulation in summer and the mesoscale circulation mechanisms responsible for their formation. Throughout the GSL, the topographic forcing of the surface circulation appeared essential in forming convergence zones where observed krill concentrations were systematically higher than average, and within which most of the densest patches were observed. This approach can help in defining the dynamics of the feeding habitat of baleen whales in the GSL, in particular blue and fin whales whose diet is dominated by krill. |
author2 |
Species At Risk Program (SARCEP) and Ecosystem Research Initiative |
format |
Article in Journal/Newspaper |
author |
Maps, Frédéric Plourde, Stéphane McQuinn, Ian H. St‐Onge‐Drouin, Simon Lavoie, Diane Chassé, Joël Lesage, Véronique |
spellingShingle |
Maps, Frédéric Plourde, Stéphane McQuinn, Ian H. St‐Onge‐Drouin, Simon Lavoie, Diane Chassé, Joël Lesage, Véronique Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada |
author_facet |
Maps, Frédéric Plourde, Stéphane McQuinn, Ian H. St‐Onge‐Drouin, Simon Lavoie, Diane Chassé, Joël Lesage, Véronique |
author_sort |
Maps, Frédéric |
title |
Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada |
title_short |
Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada |
title_full |
Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada |
title_fullStr |
Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada |
title_full_unstemmed |
Linking acoustics and finite‐time Lyapunov exponents reveals areas and mechanisms of krill aggregation within the Gulf of St. Lawrence, eastern Canada |
title_sort |
linking acoustics and finite‐time lyapunov exponents reveals areas and mechanisms of krill aggregation within the gulf of st. lawrence, eastern canada |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/lno.10145 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10145 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10145 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
baleen whale baleen whales North Atlantic |
genre_facet |
baleen whale baleen whales North Atlantic |
op_source |
Limnology and Oceanography volume 60, issue 6, page 1965-1975 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.10145 |
container_title |
Limnology and Oceanography |
container_volume |
60 |
container_issue |
6 |
container_start_page |
1965 |
op_container_end_page |
1975 |
_version_ |
1802642680644108288 |