Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan
Abstract Burbot Lota lota are a key demersal piscivore across the Laurentian Great Lakes whose populations have declined by about 90% in recent decades. Larval Burbot typically hatch in the early spring and rely on abundant crustacean zooplankton prey. We examined the stomach contents of larval Burb...
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crwiley:10.1080/00028487.2013.788561 2024-06-02T08:04:38+00:00 Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan George, Ellen M. Roseman, Edward F. Davis, Bruce M. O'Brien, Timothy P. 2013 http://dx.doi.org/10.1080/00028487.2013.788561 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/00028487.2013.788561 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 142, issue 6, page 1716-1723 ISSN 0002-8487 1548-8659 journal-article 2013 crwiley https://doi.org/10.1080/00028487.2013.788561 2024-05-03T10:37:35Z Abstract Burbot Lota lota are a key demersal piscivore across the Laurentian Great Lakes whose populations have declined by about 90% in recent decades. Larval Burbot typically hatch in the early spring and rely on abundant crustacean zooplankton prey. We examined the stomach contents of larval Burbot from inshore (≤15 m) and offshore sites (37 and 91 m) in northern Lake Huron, Michigan. Concurrent zooplankton vertical tows at the same sites showed that the prey community was dominated by calanoid copepods, dreissenid mussel veligers, and rotifers. Burbot consumed mostly cyclopoid copepods, followed by copepod nauplii and calanoid copepods. Chesson's index of selectivity was calculated and compared among sites and months for individual Burbot. According to this index, larval Burbot exhibited positive selection for cyclopoid copepods and copepod nauplii and negative selection for calanoid copepods, cladocerans, rotifers, and dreissenid veligers. This selectivity was consistent across sites and throughout the sampling period. Burbot displayed little variation in their prey preferences during the larval stage, which suggests that the recent shifts in zooplankton abundance due to the invasion of the predatory zooplankter Bythotrephes longimanus and competition from invasive Rainbow Smelt Osmerus mordax could negatively impact larval Burbot populations. Article in Journal/Newspaper Burbot Lota lota Copepods lota Wiley Online Library Transactions of the American Fisheries Society 142 6 1716 1723 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Burbot Lota lota are a key demersal piscivore across the Laurentian Great Lakes whose populations have declined by about 90% in recent decades. Larval Burbot typically hatch in the early spring and rely on abundant crustacean zooplankton prey. We examined the stomach contents of larval Burbot from inshore (≤15 m) and offshore sites (37 and 91 m) in northern Lake Huron, Michigan. Concurrent zooplankton vertical tows at the same sites showed that the prey community was dominated by calanoid copepods, dreissenid mussel veligers, and rotifers. Burbot consumed mostly cyclopoid copepods, followed by copepod nauplii and calanoid copepods. Chesson's index of selectivity was calculated and compared among sites and months for individual Burbot. According to this index, larval Burbot exhibited positive selection for cyclopoid copepods and copepod nauplii and negative selection for calanoid copepods, cladocerans, rotifers, and dreissenid veligers. This selectivity was consistent across sites and throughout the sampling period. Burbot displayed little variation in their prey preferences during the larval stage, which suggests that the recent shifts in zooplankton abundance due to the invasion of the predatory zooplankter Bythotrephes longimanus and competition from invasive Rainbow Smelt Osmerus mordax could negatively impact larval Burbot populations. |
format |
Article in Journal/Newspaper |
author |
George, Ellen M. Roseman, Edward F. Davis, Bruce M. O'Brien, Timothy P. |
spellingShingle |
George, Ellen M. Roseman, Edward F. Davis, Bruce M. O'Brien, Timothy P. Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan |
author_facet |
George, Ellen M. Roseman, Edward F. Davis, Bruce M. O'Brien, Timothy P. |
author_sort |
George, Ellen M. |
title |
Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan |
title_short |
Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan |
title_full |
Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan |
title_fullStr |
Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan |
title_full_unstemmed |
Feeding Ecology of Pelagic Larval Burbot in Northern Lake Huron, Michigan |
title_sort |
feeding ecology of pelagic larval burbot in northern lake huron, michigan |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1080/00028487.2013.788561 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/00028487.2013.788561 |
genre |
Burbot Lota lota Copepods lota |
genre_facet |
Burbot Lota lota Copepods lota |
op_source |
Transactions of the American Fisheries Society volume 142, issue 6, page 1716-1723 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1080/00028487.2013.788561 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
142 |
container_issue |
6 |
container_start_page |
1716 |
op_container_end_page |
1723 |
_version_ |
1800749282724151296 |