Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Data source: </SPAN></P><P><SPAN>DFO synoptic groundfish trawl surveys</SPAN></P><P><SPAN>Methods summary: </SPAN></P><P><SPAN>Fish and invertebrate biomass and diversity was calculated from CPUE (kg/hr) from DFO synoptic groundfish bottom trawl surveys that are carried out at depths of 50–1300 m. DFO synoptic surveys are standardized, depth-stratified random bottom trawl surveys in four regions of BC that cover the continental shelf of BC: West Coast Haida Gwaii, Hecate Strait, Queen Charlotte Sound, and West Coast Vancouver Island. These surveys do not include inlets, enclosed waters, sensitive habitats (e.g., Hecate Strait Glass Sponge reefs, Learmonth Bank Red Tree corals, Rockfish Conservation Areas), areas that are not trawlable or the steep slope off the southwest part of Haida Gwaii (Workman et al. 2008, Olsen et al. 2009). All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 28 November 2016, limiting the query to records quality-tagged as "fully usable". The synoptic dataset spans July 2003 - June 2016, and includes samples from the months of May to October, but most are from May to July. Total biomass was calculated from the sum of CPUE from</SPAN><SPAN /><SPAN>all fish </SPAN><SPAN>taxa in each fishing event (trawl tow)</SPAN><SPAN>. Shannon Diversity (H') was calculated from CPUE of fish species using the diversity function in the R package ‘vegan’.</SPAN></P><P><SPAN>Biomass and Shannon diversity values were used to detect hotspots using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude any large areas of the polygons that did not include hotspot points.</SPAN></P><P><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018).</SPAN></P><P><SPAN>Date Represented: 2003-2016</SPAN></P><P><SPAN>Date Updated: Nov 2017</SPAN></P><P><SPAN>References:</SPAN></P><P><SPAN>Olsen, N., Rutherford, K.L., Stanley, R.D., and Wyeth, M. 2009. West Coast Vancouver Island Groundfish Bottom Trawl Survey, May 26th to June 22nd, 2008. Can. Man. Rep. Fish. Aquat. Sci. 2092: 50 p</SPAN></P><P><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P><P><SPAN>Workman, G.D., Stanley, R.D., Olsen, N., and Rutherford, K.L. 2008. West Coast Queen Charlotte Islands Groundfish Bottom Trawl Survey, September 11th to October 17th, 2007. Can. Man. Rep. Fish. Aquat. Sci. 2823: 45 p.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 90568cd0164044c0ab4b687e4a6218f0
Copyright Text: Data Collector/Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>Data source:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>PHMA longline </SPAN><SPAN>surveys</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Methods summary:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Fish diversity was calculated from CPUE (count/hook/hr) </SPAN><SPAN>from </SPAN><SPAN>Pacific Halibut Management Association (PHMA) surveys. PHMA surveys are standardized, depth-stratified random longline surveys that are carried out at depths of 20–260 m. All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 18 April 2017, limiting the query to records quality-tagged as "fully usable". The PHMA dataset spans August 2006 - August 2016 and includes records taken in the months of August and September. Shannon Diversity (H') was calculated from CPUE </SPAN><SPAN>of fish species </SPAN><SPAN>using the diversity function in the R package ‘vegan’.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN>Shannon diversity values were used to detect hotspots of diversity within coastal areas using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to </SPAN><SPAN>exclude any large </SPAN><SPAN>areas </SPAN><SPAN>of </SPAN><SPAN>the polygons that did not include hotspot points.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018</SPAN><SPAN /><SPAN>).</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Represented: 200</SPAN><SPAN>6</SPAN><SPAN>-2016</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Updated: Nov 2017</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>References:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Data Collector/Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>Data Sources:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Habitat richness was calculated from </SPAN><SPAN>eight habitat features</SPAN><SPAN>: </SPAN><SPAN>eelgrass, surfgrass, canopy-forming kelp, estuaries, areas of high rugosity, and hard, mixed, and soft substrate.</SPAN><SPAN /><SPAN>Layers for eelgrass, surfgrass, canopy-forming kelp, and estuaries were assembled as part of an assessment of nearshore EBSA features (</SPAN><SPAN>Rubidge et al. in revision</SPAN><SPAN>)</SPAN><SPAN>. The kelp and eelgrass layers consist of polygons and ShoreZone biobands available from the British Columbia Marine Conservation Analysis (BCMCA), and the estuary layer is from the Pacific Estuary Conservation Program, most recently updated in 2014, but originally developed in 2007 (</SPAN><SPAN>Ryder et al. 2007</SPAN><SPAN>)</SPAN><SPAN>. We used the </SPAN><SPAN>BCMCA layer </SPAN><SPAN>representing areas of high rugosity that was developed using the Benthic Terrain Modeller ArcGIS tool and the NRCAN 75 m bathymetry model </SPAN><SPAN /><SPAN>(</SPAN><A href="http://bcmca.ca/datafiles/individualfiles/bcmca_eco_physical_highrugosity_metadata.htm"><SPAN><SPAN>http://bcmca.ca/datafiles/individualfiles/bcmca_eco_physical_highrugosity_metadata.htm</SPAN></SPAN></A><SPAN>)</SPAN><SPAN /><SPAN>. Finally, for substrate type, we used three layers representing hard, mixed, and soft substrate in nearshore waters from a bottom patch model developed by </SPAN><SPAN>Gregr et </SPAN><SPAN>al. (2013</SPAN><SPAN>)</SPAN><SPAN><SPAN>.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Methods summary:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The nearshore area represents shallow coastal areas (</SPAN></SPAN><SPAN><SPAN>any location </SPAN></SPAN><SPAN>2 km from the coastline </SPAN><SPAN>or shallower than </SPAN><SPAN><SPAN>20 meters depth) and internal waterways </SPAN></SPAN><SPAN>and inlets. The eight layers were clipped to the nearshore area and overlaid with each other in ArcMap 10.4. Habitat richness was calculated by summing the number of features within 1 km x 1 km planning units. Habitat richness values were used to detect hotspots of habitat richness within the nearshore area using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (high values; Gi_Bin>0), a cold spot (low values; Gi_Bin<0), or neutral (Gi_Bin=0). A 1 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. For the purpose of MPA network planning, only 1 km planning units with Gi_Bin values of 3 (99% confidence) were classified as habitat richness hotspots. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018).</SPAN></SPAN></P><P><SPAN>References:</SPAN></P><P><SPAN>Gregr, E.J., Lessard, J., and Harper, J. 2013. A spatial framework for representing nearshore ecosystems. Prog. Oceanog. 115: 189-201</SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>Rubidge E. Jeffery, S., Gregr, E., Gale, K.S.P., and Frid, A. in revision. Assessment of nearshore features in the Northern Shelf Bioregion against criteria for determining Ecologically and Biologically Significant Areas (EBSAs). DFO Can. Sci. Advis. Sec. Res. Doc.</SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. </SPAN><SPAN><SPAN>2018</SPAN></SPAN><SPAN><SPAN>. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053: xii+97 p.</SPAN></SPAN></P><P STYLE="margin:0 0 16 0;"><SPAN>Ryder, J.L., Kenyon, J.K., Buffett, D., Moore, K., Ceh, M., and Stipec, K. 2007. An integrated biophysical assessment of estuarine habitats in British Columbia to assist regional conservation planning. Canadian Wildlife Service Technical Report Series 476. Pacific and Yukon Region, British Columbia.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Data Collector: Various - see BCMCA metadata for details (kelp, eelgrass, surfgrass); PECP (estuaries); NRCan/CHS (substrate)
Data Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:8 0 8 0;"><SPAN><SPAN>Data source:</SPAN></SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>DFO synoptic groundfish trawl surveys</SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>Methods summary:</SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN><SPAN>Invertebrate diversity</SPAN></SPAN><SPAN /><SPAN>was calculated from CPUE (kg/hr) from DFO groundfish synoptic bottom trawl surveys that are carried out at depths of 50–1300 m. DFO synoptic surveys are standardized, depth-stratified random bottom trawl surveys in four regions of BC that cover the continental shelf of BC: West Coast Haida Gwaii, Hecate Strait, Queen Charlotte Sound, and West Coast Vancouver Island. These surveys do not include inlets, enclosed waters, sensitive habitats (e.g., Hecate Strait Glass Sponge reefs, Learmonth Bank Red Tree corals, Rockfish Conservation Areas), areas that are not trawlable or the steep slope off the southwest part of Haida Gwaii (Workman et al. 2008, Olsen et al. 2009). All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 28 November 2016, limiting the query to records quality-tagged as "fully usable". The synoptic dataset spans July 2003 - June 2016, and includes samples from the months of May to October, but most are from May to July. Shannon Diversity (H') was calculated from CPUE </SPAN><SPAN>of inve</SPAN><SPAN>r</SPAN><SPAN>tebrate species </SPAN><SPAN>using the diversity function in the R package ‘vegan’.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Shannon diversity values were used to detect hotspots of diversity within shelf areas using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude any large areas of the polygons that did not include hotspot points.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018).</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Represented: 2003-2016</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Updated: Nov 2017</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>References:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Olsen, N., Rutherford, K.L., Stanley, R.D., and Wyeth, M. 2009. West Coast Vancouver Island Groundfish Bottom Trawl Survey, May 26th to June 22nd, 2008. Can. Man. Rep. Fish. Aquat. Sci. 2092: 50 p.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Workman, G.D., Stanley, R.D., Olsen, N., and Rutherford, K.L. 2008. West Coast Queen Charlotte Islands Groundfish Bottom Trawl Survey, September 11th to October 17th, 2007. Can. Man. Rep. Fish. Aquat. Sci. 2823: 45 p.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 90568cd0164044c0ab4b687e4a6218f0
Copyright Text: Data collector/Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:8 0 8 0;"><SPAN><SPAN>Data source:</SPAN></SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>DFO synoptic groundfish trawl surveys</SPAN><SPAN>and PHMA Longline surveys</SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>Methods summary:</SPAN></P><P STYLE="margin:8 0 8 0;"><SPAN>Fish diversity was calculated from CPUE (kg/hr) from DFO groundfish synoptic bottom trawl surveys that are carried out at depths of </SPAN><SPAN><SPAN>50–1300 m</SPAN></SPAN><SPAN><SPAN>. </SPAN></SPAN><SPAN><SPAN>DFO </SPAN></SPAN><SPAN><SPAN>synoptic surveys are </SPAN></SPAN><SPAN>standardized, depth-stratified random bottom trawl surveys in four regions of BC that cover the continental shelf of BC: West Coast Haida Gwaii, Hecate Strait, Queen Charlotte Sound, and West Coast Vancouver Island. These surveys do not include inlets, enclosed waters, sensitive habitats (e.g., Hecate Strait Glass Sponge reefs, Learmonth Bank Red Tree corals, Rockfish Conservation Areas), areas that are not trawlable or the steep slope off the southwest part of Haida Gwaii (Workman et al. 2008, Olsen et al. 2009). All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 28 November 2016, limiting the query to records quality-tagged as "fully usable". The synoptic dataset spans July 2003 - June 2016, and includes samples from the months of May to October, but most are from May to July. </SPAN><SPAN>Shannon Diversity (H') was calculated from </SPAN><SPAN>CPUE of </SPAN><SPAN>fish species </SPAN><SPAN>using the diversity function in the R package ‘vegan’.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Shannon diversity values were used to detect hotspots of diversity within shelf areas using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude </SPAN><SPAN>any </SPAN><SPAN>large areas of the polygons that did not include hotspot points.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018).</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Represented: 2003-2016</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Updated: Nov 2017</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>References:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Olsen, N., Rutherford, K.L., Stanley, R.D., and Wyeth, M. 2009. West Coast Vancouver Island Groundfish Bottom Trawl Survey, May 26th to June 22nd, 2008. Can. Man. Rep. Fish. Aquat. Sci. 2092: 50 p</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Workman, G.D., Stanley, R.D., Olsen, N., and Rutherford, K.L. 2008. West Coast Queen Charlotte Islands Groundfish Bottom Trawl Survey, September 11th to October 17th, 2007. Can. Man. Rep. Fish. Aquat. Sci. 2823: 45 p.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 90568cd0164044c0ab4b687e4a6218f0
Copyright Text: Data Collector/Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>Data source:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>PHMA longline </SPAN><SPAN>surveys</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Methods summary:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Fish diversity was calculated from CPUE (count/hook/hr) </SPAN><SPAN>from </SPAN><SPAN>Pacific Halibut Management Association (PHMA) surveys. PHMA surveys are standardized, depth-stratified random longline surveys that are carried out at depths of 20–260 m. All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 18 April 2017, limiting the query to records quality-tagged as "fully usable". The PHMA dataset spans August 2006 - August 2016 and includes records taken in the months of August and September. Shannon Diversity (H') was calculated from CPUE </SPAN><SPAN>of fish species </SPAN><SPAN>using the diversity function in the R package ‘vegan’.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN>Shannon diversity values were used to detect hotspots of diversity within coastal areas using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to </SPAN><SPAN>exclude any large </SPAN><SPAN>areas </SPAN><SPAN>of </SPAN><SPAN>the polygons that did not include hotspot points.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018</SPAN><SPAN /><SPAN>).</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Represented: 200</SPAN><SPAN>6</SPAN><SPAN>-2016</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Date Updated: Nov 2017</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>References:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 90568cd0164044c0ab4b687e4a6218f0
Copyright Text: Data Collector/Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Data source:</SPAN></P><P><SPAN>DFO synoptic groundfish trawl surveys</SPAN></P><P><SPAN>Methods summary:</SPAN></P><P><SPAN>Invertebrate biomass was calculated from CPUE (kg/hr) from DFO groundfish synoptic bottom trawl surveys that are carried out at depths of 50–1300 m. DFO synoptic surveys are standardized, depth-stratified random bottom trawl surveys in four regions of BC that cover the continental shelf of BC: West Coast Haida Gwaii, Hecate Strait, Queen Charlotte Sound, and West Coast Vancouver Island. These surveys do not include inlets, enclosed waters, sensitive habitats (e.g., Hecate Strait Glass Sponge reefs, Learmonth Bank Red Tree corals, Rockfish Conservation Areas), areas that are not trawlable or the steep slope off the southwest part of Haida Gwaii (Workman et al. 2008, Olsen et al. 2009). All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 28 November 2016, limiting the query to records quality-tagged as "fully usable". The synoptic dataset spans July 2003 - June 2016, and includes samples from the months of May to October, but most are from May to July. Total biomass was calculated from the sum of CPUE from</SPAN><SPAN /><SPAN>all invertebrate </SPAN><SPAN>taxa within each fishing event (trawl tow)</SPAN><SPAN>.</SPAN></P><P><SPAN>Biomass values were used to detect hotspots of invertebrate biomass within shelf areas using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude any large areas of the polygons that did not include hotspot points.</SPAN></P><P><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018).</SPAN></P><P><SPAN>Date Represented: 2003-2016</SPAN></P><P><SPAN>Date Updated: Nov 2017</SPAN></P><P><SPAN>References:</SPAN></P><P><SPAN>Olsen, N., Rutherford, K.L., Stanley, R.D., and Wyeth, M. 2009. West Coast Vancouver Island Groundfish Bottom Trawl Survey, May 26th to June 22nd, 2008. Can. Man. Rep. Fish. Aquat. Sci. 2092: 50 p</SPAN></P><P><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P><P><SPAN>Workman, G.D., Stanley, R.D., Olsen, N., and Rutherford, K.L. 2008. West Coast Queen Charlotte Islands Groundfish Bottom Trawl Survey, September 11th to October 17th, 2007. Can. Man. Rep. Fish. Aquat. Sci. 2823: 45 p.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 90568cd0164044c0ab4b687e4a6218f0
Copyright Text: Data collector/Processor/Holder: DFO
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Data source: </SPAN></P><P><SPAN>DFO synoptic groundfish trawl surveys</SPAN></P><P><SPAN>Methods summary: </SPAN></P><P><SPAN>Fish biomass was calculated from CPUE (kg/hr) from DFO synoptic groundfish bottom trawl surveys that are carried out at depths of 50–1300 m. DFO synoptic surveys are standardized, depth-stratified random bottom trawl surveys in four regions of BC that cover the continental shelf of BC: West Coast Haida Gwaii, Hecate Strait, Queen Charlotte Sound, and West Coast Vancouver Island. These surveys do not include inlets, enclosed waters, sensitive habitats (e.g., Hecate Strait Glass Sponge reefs, Learmonth Bank Red Tree corals, Rockfish Conservation Areas), areas that are not trawlable or the steep slope off the southwest part of Haida Gwaii (Workman et al. 2008, Olsen et al. 2009). All species caught are weighed or counted and identified to the lowest possible taxonomic level. Data was extracted from DFO's GFBio database on 28 November 2016, limiting the query to records quality-tagged as "fully usable". The synoptic dataset spans July 2003 - June 2016, and includes samples from the months of May to October, but most are from May to July. Total biomass was calculated from the sum of CPUE from</SPAN><SPAN /><SPAN>all fish </SPAN><SPAN>taxa in each fishing event (trawl tow)</SPAN><SPAN>.</SPAN></P><P><SPAN>Biomass values were used to detect hotspots of fish biomass within shelf areas using the Getis-Ord G* tool. The G* statistic represents the local neighbourhood sum compared proportionally to the sum of all features in the study area. When the local sum is significantly different from the expected sum, then that site is identified as a hotspot (Gi_Bin>0), a cold spot (Gi_Bin<0), or neutral (Gi_Bin=0). A 10 km distance value was used as the neighbourhood size. The false discovery rate correction was applied, which accounts for multiple testing and spatial dependence. </SPAN><SPAN>Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. </SPAN></P><P><SPAN>Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude any large areas of the polygons that did not include hotspot points.</SPAN></P><P><SPAN>This layer was reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017 (Rubidge et al. 2018).</SPAN></P><P><SPAN>Date Represented: 2003-2016</SPAN></P><P><SPAN>Date Updated: Nov 2017</SPAN></P><P><SPAN>References:</SPAN></P><P><SPAN>Olsen, N., Rutherford, K.L., Stanley, R.D., and Wyeth, M. 2009. West Coast Vancouver Island Groundfish Bottom Trawl Survey, May 26th to June 22nd, 2008. Can. Man. Rep. Fish. Aquat. Sci. 2092: 50 p</SPAN></P><P><SPAN>Rubidge, E., Nephin, J., Gale, K.S.P., and Curtis, J. 2018. Reassessment of the Ecologically and Biologically Significant Areas (EBSAs) in the Pacific Northern Shelf Bioregion. DFO Can. Sci. Advis. Sec. Res. Doc. 2018/053. xii + 97 p.</SPAN></P><P><SPAN>Workman, G.D., Stanley, R.D., Olsen, N., and Rutherford, K.L. 2008. West Coast Queen Charlotte Islands Groundfish Bottom Trawl Survey, September 11th to October 17th, 2007. Can. Man. Rep. Fish. Aquat. Sci. 2823: 45 p.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 90568cd0164044c0ab4b687e4a6218f0
Copyright Text: Data Collector/Processor/Holder: DFO