Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern
The Atlantic halibut ( Hippoglossus hippoglossus ) longline fishery is the second most valuable groundfish fishery in Atlantic Canada and received Marine Stewardship Council certification in 2013. The bottom longline fishery accounts for most halibut landings but incidentally catches nontargeted spe...
Published in: | Conservation Science and Practice |
---|---|
Main Authors: | , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/csp2.3 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.3 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.3 |
id |
crwiley:10.1111/csp2.3 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/csp2.3 2024-06-02T08:03:10+00:00 Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern Hurley, Isabelle Wringe, Brendan F. den Heyer, Cornelia E. Shackell, Nancy L. Lotze, Heike K. Natural Sciences and Engineering Research Council of Canada 2019 http://dx.doi.org/10.1111/csp2.3 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.3 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.3 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Conservation Science and Practice volume 1, issue 1 ISSN 2578-4854 2578-4854 journal-article 2019 crwiley https://doi.org/10.1111/csp2.3 2024-05-03T10:38:51Z The Atlantic halibut ( Hippoglossus hippoglossus ) longline fishery is the second most valuable groundfish fishery in Atlantic Canada and received Marine Stewardship Council certification in 2013. The bottom longline fishery accounts for most halibut landings but incidentally catches nontargeted species (bycatch). Since 1998, Fisheries and Oceans Canada and the halibut fishing industry performed annual longline surveys across the Scotian Shelf and Southern Grand Banks stock management area to monitor halibut abundance, and at‐sea observers also recorded bycatch information. We examined the species composition and proportion of the survey bycatch and analyzed temporal and spatial trends in standardized weight of (a) halibut catch, (b) total bycatch, and (c) bycatch of species of conservation concern. From 1998 to 2016, 70% of the total catch by weight and 85% by number of individuals were bycatch. Over 100 identified species of finfish, sharks, skates, benthic invertebrates, marine mammals, and seabirds were caught as bycatch in the survey. This included four species listed under the Species at Risk Act (Northern wolffish, Anarhichas denticulatus spotted wolffish, A. minor Atlantic wolffish, A. lupus; Atlantic cod, Gadus morhua ), and another 14 species awaiting a listing decision based on assessments by the Committee on the Status of Endangered Wildlife in Canada. Generally, the standardized weight of halibut and barndoor skate ( Dipturus laevis ) increased over time, while Atlantic cod, spiny dogfish ( Squalus acanthias ), white hake ( Urophycis tenuis ), and thorny skate ( Amblyraja radiata ) decreased. Spatial patterns indicated high bycatch levels on the southern Scotian Shelf and southern edge of the Southern Grand Banks, with hotspots for certain species of conservation concern. Our results identify temporal trends in threatened species and areas where they are susceptible to the Atlantic halibut longline fishery which can inform recovery strategies, bycatch levels and spatial zoning in fisheries ... Article in Journal/Newspaper atlantic cod Gadus morhua spiny dogfish Squalus acanthias Wiley Online Library Canada Hake ENVELOPE(15.612,15.612,66.797,66.797) Conservation Science and Practice 1 1 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The Atlantic halibut ( Hippoglossus hippoglossus ) longline fishery is the second most valuable groundfish fishery in Atlantic Canada and received Marine Stewardship Council certification in 2013. The bottom longline fishery accounts for most halibut landings but incidentally catches nontargeted species (bycatch). Since 1998, Fisheries and Oceans Canada and the halibut fishing industry performed annual longline surveys across the Scotian Shelf and Southern Grand Banks stock management area to monitor halibut abundance, and at‐sea observers also recorded bycatch information. We examined the species composition and proportion of the survey bycatch and analyzed temporal and spatial trends in standardized weight of (a) halibut catch, (b) total bycatch, and (c) bycatch of species of conservation concern. From 1998 to 2016, 70% of the total catch by weight and 85% by number of individuals were bycatch. Over 100 identified species of finfish, sharks, skates, benthic invertebrates, marine mammals, and seabirds were caught as bycatch in the survey. This included four species listed under the Species at Risk Act (Northern wolffish, Anarhichas denticulatus spotted wolffish, A. minor Atlantic wolffish, A. lupus; Atlantic cod, Gadus morhua ), and another 14 species awaiting a listing decision based on assessments by the Committee on the Status of Endangered Wildlife in Canada. Generally, the standardized weight of halibut and barndoor skate ( Dipturus laevis ) increased over time, while Atlantic cod, spiny dogfish ( Squalus acanthias ), white hake ( Urophycis tenuis ), and thorny skate ( Amblyraja radiata ) decreased. Spatial patterns indicated high bycatch levels on the southern Scotian Shelf and southern edge of the Southern Grand Banks, with hotspots for certain species of conservation concern. Our results identify temporal trends in threatened species and areas where they are susceptible to the Atlantic halibut longline fishery which can inform recovery strategies, bycatch levels and spatial zoning in fisheries ... |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Hurley, Isabelle Wringe, Brendan F. den Heyer, Cornelia E. Shackell, Nancy L. Lotze, Heike K. |
spellingShingle |
Hurley, Isabelle Wringe, Brendan F. den Heyer, Cornelia E. Shackell, Nancy L. Lotze, Heike K. Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
author_facet |
Hurley, Isabelle Wringe, Brendan F. den Heyer, Cornelia E. Shackell, Nancy L. Lotze, Heike K. |
author_sort |
Hurley, Isabelle |
title |
Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
title_short |
Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
title_full |
Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
title_fullStr |
Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
title_full_unstemmed |
Spatiotemporal bycatch analysis of the Atlantic halibut ( Hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
title_sort |
spatiotemporal bycatch analysis of the atlantic halibut ( hippoglossus hippoglossus) longline fishery survey indicates hotspots for species of conservation concern |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/csp2.3 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.3 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.3 |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Canada Hake |
geographic_facet |
Canada Hake |
genre |
atlantic cod Gadus morhua spiny dogfish Squalus acanthias |
genre_facet |
atlantic cod Gadus morhua spiny dogfish Squalus acanthias |
op_source |
Conservation Science and Practice volume 1, issue 1 ISSN 2578-4854 2578-4854 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/csp2.3 |
container_title |
Conservation Science and Practice |
container_volume |
1 |
container_issue |
1 |
_version_ |
1800747646428643328 |