Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada
<qd> Brillant, S. W., and Trippel, E. A. 2010. Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada. – ICES Journal of Marine Science, 67: 355–364. </qd>Fishing gear is known to be a threat...
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fthighwire:oai:open-archive.highwire.org:icesjms:67/2/355 2023-05-15T16:08:19+02:00 Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada Brillant, Sean W. Trippel, Edward A. 2010-03-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/67/2/355 https://doi.org/10.1093/icesjms/fsp231 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/67/2/355 http://dx.doi.org/10.1093/icesjms/fsp231 Copyright (C) 2010, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2010 fthighwire https://doi.org/10.1093/icesjms/fsp231 2010-02-28T08:04:38Z <qd> Brillant, S. W., and Trippel, E. A. 2010. Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada. – ICES Journal of Marine Science, 67: 355–364. </qd>Fishing gear is known to be a threat to North Atlantic right whales ( Eubalaena glacialis ), and groundlines used in the American lobster ( Homarus americanus ) trap fishery are hypothesized to be an integral component of entanglements that may, in some incidents, lead to mortality. This research measured the elevations above the seabed of 17 regular groundlines on commercially active lobster gear in the Bay of Fundy and evaluated several factors governing rope elevation profiles. Mean elevation was 1.6 m (s.d. = 0.9, n = 5968, range = 0.0–7.0 m). The hypothesis that groundline elevations were ≤1.0 m (predicted height of taut groundlines) was rejected (Fisher's C = 66.9, p < 0.01), as was the hypothesis that elevations were >3.0 m (approximate body height of a right whale; Fisher's C = 129.5, p < 0.01). The proportion of groundline elevations ≤1.0 m was 0.32, and that <3.0 m was 0.92. Groundline elevations were negatively related to tidal current velocity at the time of setting ( p < 0.001, r 2 = 0.33) and were closer to the seabed in deep than in shallow water ( p < 0.05, r 2 = 0.07). It is suggested that groundlines in the Bay of Fundy may not constitute a large part of the risk associated with the entanglement of right whales, because most lines remained below the elevation hypothesized to be a threat (3 m). We also identified factors within the control of fishers setting trawls that minimize groundline elevations. Text Eubalaena glacialis North Atlantic HighWire Press (Stanford University) Canada ICES Journal of Marine Science 67 2 355 364 |
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Articles Brillant, Sean W. Trippel, Edward A. Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada |
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<qd> Brillant, S. W., and Trippel, E. A. 2010. Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada. – ICES Journal of Marine Science, 67: 355–364. </qd>Fishing gear is known to be a threat to North Atlantic right whales ( Eubalaena glacialis ), and groundlines used in the American lobster ( Homarus americanus ) trap fishery are hypothesized to be an integral component of entanglements that may, in some incidents, lead to mortality. This research measured the elevations above the seabed of 17 regular groundlines on commercially active lobster gear in the Bay of Fundy and evaluated several factors governing rope elevation profiles. Mean elevation was 1.6 m (s.d. = 0.9, n = 5968, range = 0.0–7.0 m). The hypothesis that groundline elevations were ≤1.0 m (predicted height of taut groundlines) was rejected (Fisher's C = 66.9, p < 0.01), as was the hypothesis that elevations were >3.0 m (approximate body height of a right whale; Fisher's C = 129.5, p < 0.01). The proportion of groundline elevations ≤1.0 m was 0.32, and that <3.0 m was 0.92. Groundline elevations were negatively related to tidal current velocity at the time of setting ( p < 0.001, r 2 = 0.33) and were closer to the seabed in deep than in shallow water ( p < 0.05, r 2 = 0.07). It is suggested that groundlines in the Bay of Fundy may not constitute a large part of the risk associated with the entanglement of right whales, because most lines remained below the elevation hypothesized to be a threat (3 m). We also identified factors within the control of fishers setting trawls that minimize groundline elevations. |
format |
Text |
author |
Brillant, Sean W. Trippel, Edward A. |
author_facet |
Brillant, Sean W. Trippel, Edward A. |
author_sort |
Brillant, Sean W. |
title |
Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada |
title_short |
Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada |
title_full |
Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada |
title_fullStr |
Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada |
title_full_unstemmed |
Elevations of lobster fishery groundlines in relation to their potential to entangle endangered North Atlantic right whales in the Bay of Fundy, Canada |
title_sort |
elevations of lobster fishery groundlines in relation to their potential to entangle endangered north atlantic right whales in the bay of fundy, canada |
publisher |
Oxford University Press |
publishDate |
2010 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/67/2/355 https://doi.org/10.1093/icesjms/fsp231 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Eubalaena glacialis North Atlantic |
genre_facet |
Eubalaena glacialis North Atlantic |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/67/2/355 http://dx.doi.org/10.1093/icesjms/fsp231 |
op_rights |
Copyright (C) 2010, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsp231 |
container_title |
ICES Journal of Marine Science |
container_volume |
67 |
container_issue |
2 |
container_start_page |
355 |
op_container_end_page |
364 |
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1766404381944578048 |