Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1|
Using fishery-dependent observer data from National Marine Fisheries (NMFS) provides insight into the location and intensity of bottom-trawl fishing effort, and allows those areas most exposed to fishing pressure to be identified. In this study, the spatial and temporal extent of Alaskan bottom-traw...
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Online Access: | http://epub.oeaw.ac.at/?arp=8609-0inhalt/A08_1186_FP_Steves.pdf https://doi.org/10.1553/giscience_2019_01_s87 |
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ftoeakadwiss:oai:epub.oeaw.ac.at:0x003aba38 2024-06-09T07:45:06+00:00 Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| 2019-06-19 application/pdf http://epub.oeaw.ac.at/?arp=8609-0inhalt/A08_1186_FP_Steves.pdf https://doi.org/10.1553/giscience_2019_01_s87 en eng oeaw http://epub.oeaw.ac.at/?arp=8609-0inhalt/A08_1186_FP_Steves.pdf ISSN: 2308-1708 doi:10.1553/giscience_2019_01_s87 info:eu-repo/semantics/openAccess http://hw.oeaw.ac.at/8609-0 912,spatiotemporal analysis marine fisheries hotspot analysis,Geography journal 2019 ftoeakadwiss https://doi.org/10.1553/giscience_2019_01_s87 2024-05-15T04:22:11Z Using fishery-dependent observer data from National Marine Fisheries (NMFS) provides insight into the location and intensity of bottom-trawl fishing effort, and allows those areas most exposed to fishing pressure to be identified. In this study, the spatial and temporal extent of Alaskan bottom-trawl fishing effort in the Bering Sea, Aleutian Islands and Gulf of Alaska between 1993 and 2015 is explored within a space-time cube in ArcGIS Pro. The variables analysed were number of hauls per area and total catch per area. Statistical techniques were used to examine spatiotemporal clustering within the data. Results indicate that fishing was significantly clustered over space and time. A three-dimensional hotspot analysis shows which areas were most intensely fished and illustrates the trends over the relatively long study period. The data were then compared with sea ice concentration to determine the effect of changing climate on fishing activity. Sea ice had a limited effect on the spatial patterns of fishing effort, but certain areas in the Bering Sea exhibited increased fishing effort in years with less sea ice. Journal/Newspaper Bering Sea Sea ice Alaska Aleutian Islands epub.oeaw (The digital publication portal of the Austrian Academy of Sciences) Bering Sea Gulf of Alaska GI_Forum 1 87 104 |
institution |
Open Polar |
collection |
epub.oeaw (The digital publication portal of the Austrian Academy of Sciences) |
op_collection_id |
ftoeakadwiss |
language |
English |
topic |
912,spatiotemporal analysis marine fisheries hotspot analysis,Geography |
spellingShingle |
912,spatiotemporal analysis marine fisheries hotspot analysis,Geography Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| |
topic_facet |
912,spatiotemporal analysis marine fisheries hotspot analysis,Geography |
description |
Using fishery-dependent observer data from National Marine Fisheries (NMFS) provides insight into the location and intensity of bottom-trawl fishing effort, and allows those areas most exposed to fishing pressure to be identified. In this study, the spatial and temporal extent of Alaskan bottom-trawl fishing effort in the Bering Sea, Aleutian Islands and Gulf of Alaska between 1993 and 2015 is explored within a space-time cube in ArcGIS Pro. The variables analysed were number of hauls per area and total catch per area. Statistical techniques were used to examine spatiotemporal clustering within the data. Results indicate that fishing was significantly clustered over space and time. A three-dimensional hotspot analysis shows which areas were most intensely fished and illustrates the trends over the relatively long study period. The data were then compared with sea ice concentration to determine the effect of changing climate on fishing activity. Sea ice had a limited effect on the spatial patterns of fishing effort, but certain areas in the Bering Sea exhibited increased fishing effort in years with less sea ice. |
format |
Journal/Newspaper |
title |
Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| |
title_short |
Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| |
title_full |
Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| |
title_fullStr |
Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| |
title_full_unstemmed |
Trends in the Alaskan Bottom-Trawl Fishery from 1993 to 2015: A GIS-based Spatiotemporal Analysis. GI_Forum|GI_Forum 2019, Volume 1| |
title_sort |
trends in the alaskan bottom-trawl fishery from 1993 to 2015: a gis-based spatiotemporal analysis. gi_forum|gi_forum 2019, volume 1| |
publisher |
oeaw |
publishDate |
2019 |
url |
http://epub.oeaw.ac.at/?arp=8609-0inhalt/A08_1186_FP_Steves.pdf https://doi.org/10.1553/giscience_2019_01_s87 |
geographic |
Bering Sea Gulf of Alaska |
geographic_facet |
Bering Sea Gulf of Alaska |
genre |
Bering Sea Sea ice Alaska Aleutian Islands |
genre_facet |
Bering Sea Sea ice Alaska Aleutian Islands |
op_source |
http://hw.oeaw.ac.at/8609-0 |
op_relation |
http://epub.oeaw.ac.at/?arp=8609-0inhalt/A08_1186_FP_Steves.pdf ISSN: 2308-1708 doi:10.1553/giscience_2019_01_s87 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1553/giscience_2019_01_s87 |
container_title |
GI_Forum |
container_volume |
1 |
container_start_page |
87 |
op_container_end_page |
104 |
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1801374039329996800 |