20200127 11281600 1.0 FALSE Diversity_Hotspot_Fish_Longline 636697.472800 853443.089000 746619.953300 1088985.776600 1 002 Projected GCS_North_American_1983 Linear Unit: Meter (1.000000) NAD_1983_BC_Environment_Albers <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.5'><WKT>PROJCS["NAD_1983_BC_Environment_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",1000000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-126.0],PARAMETER["Standard_Parallel_1",50.0],PARAMETER["Standard_Parallel_2",58.5],PARAMETER["Latitude_Of_Origin",45.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3005]]</WKT><XOrigin>-13239300</XOrigin><YOrigin>-8610100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102190</WKID><LatestWKID>3005</LatestWKID></ProjectedCoordinateSystem> 20200127 10400600 20200127 10400600 20000000 5000 Item Description Diversity_Hotspot_Fish_Longline Fish diversity (Shannon Diversity) hotspots in nearshore areas within the Northern Shelf Bioregion planning area <DIV STYLE="text-align:Left;"><DIV><DIV>Data source:PHMA longline surveysMethods summary:Fish diversity was calculated from CPUE (count/hook/hr) from 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 of fish species using the diversity function in the R package ‘vegan’.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. Absolute Gi_Bin values of 1, 2, and 3 correspond to 90, 95, and 99% confidence, respectively. 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.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).Date Represented: 2006-2016Date Updated: Nov 2017References: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.</DIV></DIV></DIV> Data Collector/Processor/Holder: DFO Fish Longline Hotspots Diversity Shannon Index <DIV STYLE="text-align:Left;">Any use of this dataset should take into account the scale and footprint of the analysis and the limitations (temporal, spatial, other) of the input data. Areas outside the analysis footprint may have importance that is not reflected here. This dataset was created for the purpose of marine spatial planning at a relatively broad scale and may have limitations at fine scales. </DIV> Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1.7333 1 -131.652562 -128.124245 54.779541 51.610751 Diversity_Hotspot_Fish_Longline Feature Class 0 OBJECTID_1 FID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. OBJECTID OBJECTID Integer 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Shape Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. PolygonGrp PolygonGrp Double 8 0 0 Area_km2 Area_km2 Double 8 0 0 Shape_Leng Shape_Leng Double 8 0 0 Shape_Length Shape_Length Double 8 0 0 Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. File Geodatabase Feature Class dataset EPSG 6.11(9.0.0) 0 Simple FALSE 0 TRUE FALSE 20200127