Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie
Abstract We used GIS mapping techniques to examine capture data for Burbot Lota lota from annual gill‐net surveys in Canadian waters of Lake Erie during late August and September 1994–2011. Adult males were captured over a larger area (3–17% for ≥20% maximum yearly catch [MYC]) than adult females. M...
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crwiley:10.1080/00028487.2013.795191 2024-06-02T08:04:39+00:00 Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie Stapanian, Martin A. Witzel, Larry D. Cook, Andy 2013 http://dx.doi.org/10.1080/00028487.2013.795191 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/00028487.2013.795191 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 142, issue 6, page 1724-1732 ISSN 0002-8487 1548-8659 journal-article 2013 crwiley https://doi.org/10.1080/00028487.2013.795191 2024-05-03T10:43:37Z Abstract We used GIS mapping techniques to examine capture data for Burbot Lota lota from annual gill‐net surveys in Canadian waters of Lake Erie during late August and September 1994–2011. Adult males were captured over a larger area (3–17% for ≥20% maximum yearly catch [MYC]) than adult females. More males than females were caught in the gill nets in 14 of the 15 study years. Collectively, these results support a hypothesis of greater activity by adult males during summer, when Burbot are actively feeding. The area of capture contracted by more than 60% (for ≥20% MYC) for both sexes during the time period, which is consistent with the documented decrease of the Burbot population in the lake. The sex ratio (females: males) varied over the time series but declined steadily from 0.97 in 2001 to 0.59 in 2011. The overlap in the capture areas of adult males and females was scale dependent. The depth distribution at which adult Burbot were caught did not change over the time series, and there was no difference in the median depths (about 30 m) at which adult male and female Burbot were caught. The last results are consistent with the Burbot's reliance on coldwater habitats. Additional research is recommended, including telemetry to describe daily and seasonal movements and assessment of gender bias in active and passive capture gear. Article in Journal/Newspaper Burbot Lota lota lota Wiley Online Library Transactions of the American Fisheries Society 142 6 1724 1732 |
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language |
English |
description |
Abstract We used GIS mapping techniques to examine capture data for Burbot Lota lota from annual gill‐net surveys in Canadian waters of Lake Erie during late August and September 1994–2011. Adult males were captured over a larger area (3–17% for ≥20% maximum yearly catch [MYC]) than adult females. More males than females were caught in the gill nets in 14 of the 15 study years. Collectively, these results support a hypothesis of greater activity by adult males during summer, when Burbot are actively feeding. The area of capture contracted by more than 60% (for ≥20% MYC) for both sexes during the time period, which is consistent with the documented decrease of the Burbot population in the lake. The sex ratio (females: males) varied over the time series but declined steadily from 0.97 in 2001 to 0.59 in 2011. The overlap in the capture areas of adult males and females was scale dependent. The depth distribution at which adult Burbot were caught did not change over the time series, and there was no difference in the median depths (about 30 m) at which adult male and female Burbot were caught. The last results are consistent with the Burbot's reliance on coldwater habitats. Additional research is recommended, including telemetry to describe daily and seasonal movements and assessment of gender bias in active and passive capture gear. |
format |
Article in Journal/Newspaper |
author |
Stapanian, Martin A. Witzel, Larry D. Cook, Andy |
spellingShingle |
Stapanian, Martin A. Witzel, Larry D. Cook, Andy Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie |
author_facet |
Stapanian, Martin A. Witzel, Larry D. Cook, Andy |
author_sort |
Stapanian, Martin A. |
title |
Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie |
title_short |
Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie |
title_full |
Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie |
title_fullStr |
Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie |
title_full_unstemmed |
Temporal Changes and Sexual Differences in Spatial Distribution of Burbot in Lake Erie |
title_sort |
temporal changes and sexual differences in spatial distribution of burbot in lake erie |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1080/00028487.2013.795191 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/00028487.2013.795191 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_source |
Transactions of the American Fisheries Society volume 142, issue 6, page 1724-1732 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1080/00028487.2013.795191 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
142 |
container_issue |
6 |
container_start_page |
1724 |
op_container_end_page |
1732 |
_version_ |
1800749291137925120 |